ISL3295EIHZ-T - RENESAS TECHNOLOGY

FN6544 Rev 3.00 Page 1 of 17

September 25, 2015

FN6544

Rev 3.00

September 25, 2015

ISL3293E, ISL3294E, ISL3295E ISL3296E, ISL3297E,

ISL3298E

DATASHEET

The Intersil ISL3293E, ISL3294E, ISL3295E, ISL3296E,

ISL3297E, ISL3298E are ±16.5kV HBM ESD Protected (7kV

IEC61000 contact), 3.0V to 5.5V powered, single transmitters

for balanced communication using the RS-485 and RS-422

standards. These drivers have very low bus currents (±40mA),

so they present less than a “1/8 unit load” to the RS-485 bus.

This allows more than 256 transmitters on the network without

violating the RS-485 specification’s 32 unit load maximum, and

without using repeaters.

Hot Plug circuitry ensures that the Tx outputs remain in a high

impedance state while the power supply stabilizes.

The ISL3293E, ISL3294E, ISL3296E, ISL3297E utilize slew rate

limited drivers which reduce EMI, and minimize reflections from

improperly terminated transmission lines, or from unterminated

stubs in multidrop and multipoint applications. Drivers on the

ISL3295E and ISL3298E are not limited, so they can achieve the

20Mbps data rate. All versions are offered in industrial and

extended industrial (-40°C to +125°C) temperature ranges.

A 26% smaller footprint is available with the ISL3296E,

ISL3297E, ISL3298E’s TDFN package. These devices also

feature a logic supply pin (VL) that sets the switching points of

the DE and DI inputs to be compatible with a lower supply

voltage in mixed voltage systems.

For companion single RS-485 receivers in micro packages,

please see the ISL3280E, ISL3281E, ISL3282E, ISL3283E,

ISL3284E datasheet.

Features

•High ESD protection on RS-485 outputs . . . . ±16.5kV HBM

- IEC61000-4-2 contact test method . . . . . . . . . . . . . . . ±7kV

- Class 3 ESD level on all other pins. . . . . . . . . . . .>8kV HBM

•Specified for +125°C operation (VCC ≤ 3.6V only)

• Logic supply pin (VL) eases operation in mixed supply

systems (ISL3296E through ISL3298E only)

• Hot plug - Tx outputs remain three-state during power-up

• Low Tx leakage allows >256 devices on the bus

• High data rates. . . . . . . . . . . . . . . . . . . . . . . . . . up to 20Mbps

• Low quiescent supply current. . . . . . . . . . . . . . . 150µA (max)

- Very low shutdown supply current . . . . . . . . . . . 1µA (max)

• -7V to +12V common-mode output voltage range

(VCC ≤3.6V only)

• Current limiting and thermal shutdown for driver overload

protection (VCC ≤3.6V only)

• Tri-statable Tx outputs

• 5V tolerant logic inputs when VCC ≤5V

• Pb-free (RoHS compliant)

Applications

• Clock distribution

• High node count systems

• Space constrained systems

•Security camera networks

• Building environmental control/lighting systems

• Industrial/process control networks

TABLE 1. SUMMARY OF FEATURES

PART NUMBER FUNCTION

DATA

RATE

(Mbps)

SLEW RATE

LIMITED?

HOT

PLUG?

PIN?

ENABLE?

(Note 11)

MAXIMUM

QUIESCENT

ICC (µA)

LOW POWER

SHUTDOWN?

COUNT

ISL3293E (No longer available or supported,

recommended replacement: ISL32613E)

1 Tx 0.25 YES YES NO YES 150 YES 6 Ld SOT

ISL3294E (No longer available or supported,

recommended replacement: ISL32614E)

1 Tx 0.5 YES YES NO YES 150 YES 6 Ld SOT

ISL3295E 1 Tx 20 NO YES NO YES 150 YES 6 Ld SOT

ISL3296E

(No longer available or supported)

1 Tx 0.25 YES YES YES YES 150 YES 8 Ld TDFN

ISL3297E

(No longer available or supported)

1 Tx 0.5 YES YES YES YES 150 YES 8 Ld TDFN

ISL3298E 1 Tx 20 NO YES YES YES 150 YES 8 Ld TDFN

ISL3293E, ISL3294E, ISL3295E ISL3296E, ISL3297E, ISL3298E

FN6544 Rev 3.00 Page 2 of 17

September 25, 2015

Pin Configurations

ISL3293E, ISL3294E, ISL3295E

(6 LD SOT-23)

TOP VIEW

ISL3296E, ISL3297E, ISL3298E

(8 LD TDFN)

TOP VIEW

NOTE: BOTH GND PINS MUST BE CONNECTED

VCC

GND

VCC

GND

Truth Tables

TRANSMITTING

INPUTS OUTPUTS

DE (Note 11)DI Z Y

1101

1010

0XHigh-Z *High-Z *

NOTE: *Shutdown Mode

Pin Descriptions

NAME FUNCTION

DE Driver output enable. The driver outputs, Y and Z, are enabled by

bringing DE high, and are high impedance when DE is low. If the

driver enable function isn’t needed, connect DE to VCC (or VL)

through a 1kΩ to 3kΩ resistor.

DI Driver input. A low on DI forces output Y low and output Z high.

Similarly, a high on DI forces output Y high and output Z low.

GND Ground connection. This is also the potential of the TDFN

thermal pad.

Y ±15kV HBM, ±7kV IEC61000 (contact method) ESD Protected

RS-485/422 level, noninverting transmitter output.

Z ±15kV HBM, ±7kV IEC61000 (contact method) ESD Protected

RS-485/422 level, inverting transmitter output.

VCC System power supply input (3.0V to 5.5V). On devices with a VL

pin powered from a separate supply, power-up VCC first.

VLLogic-level supply which sets the VIL/VIH levels for the DI and DE

pins (ISL3296E, ISL3297E, ISL3298E only). If VL and VCC are

different supplies, power-up this supply after VCC, and keep

VL≤VCC.

ISL3293E, ISL3294E, ISL3295E ISL3296E, ISL3297E, ISL3298E

FN6544 Rev 3.00 Page 3 of 17

September 25, 2015

Ordering Information

PART NUMBER

(Notes 1, 2, 3)

PART

MARKING

(Note 4)

TEMP.

RANGE

(°C)

PACKAGE

(RoHS

Compliant)

PKG.

DWG. #

ISL3293EFHZ-T

(No longer available or supported, recommended replacement: ISL32613E)

293F -40 to +125 6 Ld SOT-23 P6.064

ISL3293EIHZ-T

(No longer available or supported, recommended replacement: ISL32613E)

293I -40 to +85 6 Ld SOT-23 P6.064

ISL3294EFHZ-T

(No longer available or supported, recommended replacement: ISL32614E)

294F -40 to +125 6 Ld SOT-23 P6.064

ISL3294EIHZ-T

(No longer available or supported, recommended replacement: ISL32614E)

294I -40 to +85 6 Ld SOT-23 P6.064

ISL3295EFHZ-T 295F -40 to +125 6 Ld SOT-23 P6.064

ISL3295EIHZ-T 295I -40 to +85 6 Ld SOT-23 P6.064

ISL3296EFRTZ-T (No longer available or supported) 96F -40 to +125 8 Ld TDFN L8.2x3A

ISL3296EIRTZ-T (No longer available or supported) 96I -40 to +85 8 Ld TDFN L8.2x3A

ISL3297EFRTZ-T (No longer available or supported) 97F -40 to +125 8 Ld TDFN L8.2x3A

ISL3297EIRTZ-T (No longer available or supported) 97I -40 to +85 8 Ld TDFN L8.2x3A

ISL3298EFRTZ-T 98F -40 to +125 8 Ld TDFN L8.2x3A

ISL3298EIRTZ-T (No longer available or supported) 98I -40 to +85 8 Ld TDFN L8.2x3A

NOTES:

1. These Intersil Pb-free plastic packaged products employ special Pb-free material sets, molding compounds/die attach materials, and 100% matte

tin plate plus anneal (e3 termination finish, which is RoHS compliant and compatible with both SnPb and Pb-free soldering operations). Intersil

Pb-free products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020.

2. Please refer to TB347 for details on reel specifications.

3. For Moisture Sensitivity Level (MSL), please see product information page for ISL3293E, ISL3294E, ISL3295E, ISL3296E, ISL3297E, ISL3298E. For

more information on MSL, please see tech brief TB363.

4. SOT-23 “PART MARKING” is branded on the bottom side.

ISL3293E, ISL3294E, ISL3295E ISL3296E, ISL3297E, ISL3298E

FN6544 Rev 3.00 Page 4 of 17

September 25, 2015

Typical Operating Circuits

FIGURE 1. NETWORK WITH ENABLES

FIGURE 2. NETWORK WITHOUT ENABLE

FIGURE 3. NETWORK WITH VL PIN FOR INTERFACING TO LOWER VOLTAGE LOGIC DEVICES

0.1µF

VCC

GND

+3.3V TO 5V

0.1µF +

VCC

GND

+3.3V

ISL3281E ISL329xE

0.1µF

VCC

GND

RO B

+3.3V TO 5V

0.1µF +

VCC

GND

+3.3V

ISL3280E ISL329xE

1kΩ TO 3kΩ Note 10

0.1µF

VCC

GND

+3.3V TO 5V

0.1µF +

4, 5

VCC

GND

+3.3V

ISL3282E ISL3298E

1.8V

2.5V

VCC

LOGIC

DEVICE

(µP, ASIC,

UART)

VCC

LOGIC

DEVICE

(µP, ASIC,

UART)

NOTE: IF POWERED FROM SEPARATE SUPPLIES,

POWER-UP VCC BEFORE VL

ISL3293E, ISL3294E, ISL3295E ISL3296E, ISL3297E, ISL3298E

FN6544 Rev 3.00 Page 5 of 17

September 25, 2015

Absolute Maximum Ratings Thermal Information

VCC to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 7V

VL to GND (ISL3296E thru ISL3298E Only) . . . . . . . . -0.3V to (VCC + 0.3V)

Input Voltages

DI, DE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 7V

Output Voltages

Y, Z (VCC ≤ 3.6V) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -8V to +13V

Y, Z (VCC > 3.6V) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.5V to VCC +0.5V

Short-circuit Duration

Y, Z (VCC ≤ 3.6V) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Continuous

Y, Z (VCC > 3.6V, Note 13) . . . . . . . . . . . . . . . . . . . . . . . . . 1s at <300mA

ESD Rating . . . . . . . . . . . . . . . . . . See Electrical Specifications on page 6

Thermal Resistance (Typical) JA (°C/W) JC (°C/W)

6 Ld SOT-23 Package (Note 5) . . . . . . . . . . 177 N/A

8 Ld TDFN Package (Notes 6, 7). . . . . . . . . 65 8

Maximum Junction Temperature (Plastic Package) . . . . . . . . . . . +150°C

Maximum Storage Temperature Range . . . . . . . . . . . . . .-65°C to +150°C

Pb-free Reflow Profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . see TB493

Operating Conditions

Temperature Range

F Suffix (VCC ≤ 3.6V only). . . . . . . . . . . . . . . . . . . . . . . . .-40°C to +125°C

I Suffix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -40°C to +85°C

CAUTION: Do not operate at or near the maximum ratings listed for extended periods of time. Exposure to such conditions may adversely impact product

reliability and result in failures not covered by warranty.

NOTES:

5. JA is measured with the component mounted on a high effective thermal conductivity test board in free air. See Tech Brief TB379 for details.

6. JA is measured in free air with the component mounted on a high effective thermal conductivity test board with “direct attach” features. See Tech

Brief TB379.

7. For JC, the “case temp” location is the center of the exposed metal pad on the package underside.

Electrical Specifications Test Conditions: VCC = 3.0V to 5.5V, VL = VCC (ISL3296E, ISL3297E, ISL3298E only), typicals are at

TA= +25°C, unless otherwise specified. (Note 8)

PARAMETER SYMBOL TEST CONDITIONS

TEMP

(°C)

MIN

(Note 12)

TYP

(Note 14)

MAX

(Note 12)UNIT

DC CHARACTERISTICS

Driver Differential VOUT VOD RL = 100Ω (RS-422)

(Figure 4A)

VCC ≥ 3.15V Full 2 2.3 - V

VCC ≥ 4.5V Full 3 3.8 - V

RL = 54Ω (RS-485)

(Figure 4A)

VCC ≥ 3.0V Full 1.5 2 VCC V

VCC ≥ 4.5V Full 2.5 3.4 VCC V

No load Full - - VCC

RL = 60Ω, -7V ≤ VCM ≤ 12V (Figure 4B) Full 1.5 2, 3.4 - V

Change in Magnitude of Driver

Differential VOUT for

Complementary Output States

VOD RL = 54Ω or 100Ω (Figure 4A) Full - 0.01 0.2 V

Driver Common-mode VOUT VOC RL = 54Ω or 100Ω

(Figure 4A)

VCC ≤ 3.6V Full - 2 3 V

VCC ≤ 5.5V Full - - 3.2 V

Change in Magnitude of Driver

Common-mode VOUT for

Complementary Output States

VOC RL = 54Ω or 100Ω (Figure 4A) Full - 0.01 0.2 V

Input High Voltage (DI, DE) VIH1 VL = VCC if ISL3296E,

ISL3297E, ISL3298E

VCC ≤ 3.6V Full 2.2 - - V

VIH2 VCC ≤ 5.5V Full 3 - - V

VIH3 2.7V ≤ VL < 3.0V (ISL3296E, ISL3297E,

ISL3298E only)

Full 2 - - V

VIH4 2.3V ≤ VL < 2.7V (ISL3296E, ISL3297E,

ISL3298E only)

Full 1.65 - - V

VIH5 1.6V ≤ VL < 2.3V (ISL3296E, ISL3297E,

ISL3298E only)

Full 0.7*VL--V

VIH6 1.35V ≤ VL < 1.6V (ISL3296E, ISL3297E,

ISL3298E only)

25 - 0.5*VL-V

ISL3293E, ISL3294E, ISL3295E ISL3296E, ISL3297E, ISL3298E

FN6544 Rev 3.00 Page 6 of 17

September 25, 2015

Input Low Voltage (DI, DE) VIL1 VL = VCC if ISL3296E, ISL3297E, ISL3298E Full - - 0.8 V

VIL2 VL ≥ 2.7V (ISL3296E, ISL3297E, ISL3298E

only)

Full - - 0.8 V

VIL3 2.3V ≤ VL < 2.7V (ISL3296E, ISL3297E,

ISL3298E only)

Full - - 0.65 V

VIL4 1.6V ≤ VL < 2.3V (ISL3296E, ISL3297E,

ISL3298E only)

Full - - 0.22*VLV

VIL5 1.35V ≤ VL < 1.6V (ISL3296E, ISL3297E,

ISL3298E only)

25 - 0.3*VL-V

Logic Input Current IIN DI = DE = 0V or VCC (Note 11)Full-2-2µA

Output Leakage Current

(Y, Z, Note 11)

IOZ DE = 0V,

VCC = 0V, 3.6V, or 5.5V

VIN = 12V Full - 0.1 40 µA

VIN = -7V Full -40 -10 - µA

Driver Short-circuit Current,

VO = High or Low (Note 9)

IOSD1 DE = VCC, -7V ≤ VO ≤ 12V, VCC ≤ 3.6V Full - - ±250 mA

DE = VCC, 0V ≤ VO ≤ VCC, VCC > 3.6V (Note 13) Full - - ±450 mA

Thermal Shutdown Threshold TSD Full - 160 - °C

SUPPLY CURRENT

No-load Supply Current ICC DI = 0V or VCC DE = VCC Full - 120 150 µA

Shutdown Supply Current ISHDN DE = 0V, DI = 0V or VCC Full - 0.01 1 µA

ESD PERFORMANCE

RS-485 Pins (Y, Z) Human Body Model, from bus pins to GND 25 - ±16.5 - kV

IEC61000 Contact, from bus pins to GND 25 - ±7 - kV

All Pins HBM, per MIL-STD-883 Method 3015 25 - ±8 - kV

Machine Model 25 - ±400 - V

DRIVER SWITCHING CHARACTERISTICS (ISL3293E, ISL3296E, 250kbps)

Maximum Data Rate fMAX VOD = ±1.5V, CD = 820pF (Figure 7) Full 250 - - kbps

Driver Single-ended Output

Delay

tSD RDIFF = 54Ω, CD = 50pF (Figure 5) Full 400 1350 1700 ns

Part-to-part Output Delay Skew tSKPP RDIFF = 54Ω, CD = 50pF (Figure 5, Note 10)Full - - 900 ns

Driver Single-ended Output

Skew

tSSK RDIFF = 54Ω, CD = 50pF (Figure 5) Full - 600 750 ns

Driver Differential Output Delay tDD RDIFF = 54Ω CD = 50pF (Figure 5) Full 400 1100 1500 ns

Driver Differential Output Skew tDSK RDIFF = 54Ω, CD = 50pF (Figure 5) Full - 4, 1 30 ns

Driver Differential Rise or Fall

Time

tR, tFRDIFF = 54Ω,

CD = 50pF (Figure 5)

VCC ≤ 3.6V Full 400 960 1500 ns

VCC = 5V 25 - 1300 - ns

Driver Enable to Output High tZH RL = 500Ω, CL = 50pF, SW = GND (Figure 6) Full - 100, 60 250 ns

Driver Enable to Output Low tZL RL = 500Ω, CL = 50pF, SW = VCC (Figure 6) Full - 60, 35 250 ns

Driver Disable from Output High tHZ RL = 500Ω, CL = 50pF, SW = GND (Figure 6) Full - 30, 22 60 ns

Driver Disable from Output Low tLZ RL = 500Ω, CL = 50pF, SW = VCC (Figure 6) Full - 25, 20 60 ns

DRIVER SWITCHING CHARACTERISTICS (ISL3294E, ISL3297E, 500kbps)

Maximum Data Rate fMAX VOD = ±1.5V, CD = 820pF (Figure 7) Full 500 - - kbps

Driver Single-ended Output

Delay

tSD RDIFF = 54Ω, CD = 50pF (Figure 5) Full 200 340 500 ns

Part-to-part Output Delay Skew tSKPP RDIFF = 54Ω, CD = 50pF (Figure 5, Note 10)Full - - 300 ns

Driver Single-ended Output

Skew

tSSK RDIFF = 54Ω, CD = 50pF (Figure 5) Full - 30, 80 150 ns

Driver Differential Output Delay tDD RDIFF = 54Ω, CD = 50pF (Figure 5) Full 200 345 500 ns

Electrical Specifications Test Conditions: VCC = 3.0V to 5.5V, VL = VCC (ISL3296E, ISL3297E, ISL3298E only), typicals are at

TA= +25°C, unless otherwise specified. (Note 8) (Continued)

PARAMETER SYMBOL TEST CONDITIONS

TEMP

(°C)

MIN

(Note 12)

TYP

(Note 14)

MAX

(Note 12)UNIT

ISL3293E, ISL3294E, ISL3295E ISL3296E, ISL3297E, ISL3298E

FN6544 Rev 3.00 Page 7 of 17

September 25, 2015

Driver Differential Output Skew tDSK RDIFF = 54Ω, CD = 50pF (Figure 5)Full-230ns

Driver Differential Rise or Fall

Time

tR, tFRDIFF = 54Ω, CD = 50pF (Figure 5) Full 200 350 800 ns

Driver Enable to Output High tZH RL = 500Ω, CL = 50pF, SW = GND (Figure 6) Full - 100, 60 250 ns

Driver Enable to Output Low tZL RL = 500Ω, CL = 50pF, SW = VCC (Figure 6) Full - 60, 35 250 ns

Driver Disable from Output High tHZ RL = 500Ω, CL = 50pF, SW = GND (Figure 6) Full - 30, 22 60 ns

Driver Disable from Output Low tLZ RL = 500Ω, CL = 50pF, SW = VCC (Figure 6) Full - 25, 20 60 ns

DRIVER SWITCHING CHARACTERISTICS (ISL3295E, ISL3298E, 20Mbps)

Maximum Data Rate fMAX VOD = ±1.5V, CD = 360pF (Figure 7) Full 20 - - Mbps

Driver Single-ended Output

Delay

tSD RDIFF = 54Ω,

CD = 50pF (Figure 5)

VL = VCC Full 15 29, 23 42 ns

VL ≥ 1.8V 25 - 32 - ns

VL = 1.5V 25 - 36 - ns

VL = 1.35V 25 - 40 - ns

Part-to-part Output Delay Skew tSKPP RDIFF = 54Ω, CD = 50pF (Figure 5, Note 10)Full - - 25 ns

Driver Single-ended Output

Skew

tSSK RDIFF = 54Ω,

CD = 50pF (Figure 5)

VL = VCC Full - 3 7 ns

VL ≥ 1.8V 25 - 3 - ns

VL = 1.5V 25 - 4 - ns

VL = 1.35V 25 - 5 - ns

Driver Differential Output Delay tDD RDIFF = 54Ω,

CD = 50pF (Figure 5)

VL = VCC Full - 29, 22 42 ns

VL ≥ 1.8V 25 - 32 - ns

VL = 1.5V 25 - 36 - ns

VL = 1.35V 25 - 42 - ns

Driver Differential Output Skew tDSK RDIFF = 54Ω,

CD = 50pF (Figure 5)

VL = VCC ≤ 3.6V Full - 0.5 3 ns

VL = VCC = 5V 25 - 2 - ns

VL ≥ 1.8V 25 - 0.5, 1 - ns

VL ≥ 1.5V 25 - 1, 2 - ns

VL = 1.35V 25 - 2, 4 - ns

Driver Differential Rise or Fall

Time

tR, tFRDIFF = 54Ω,

CD = 50pF (Figure 5)

VL = VCC Full - 9 15 ns

VL ≥ 1.35V 25 - 9 - ns

Driver Enable to Output High tZH RL = 500Ω, CL = 50pF, SW = GND (Figure 6) Full - 100, 60 250 ns

Driver Enable to Output Low tZL RL = 500Ω, CL = 50pF, SW = VCC (Figure 6) Full - 60, 35 250 ns

Driver Disable from Output High tHZ RL = 500Ω CL = 50pF, SW = GND (Figure 6) Full - 30, 22 60 ns

Driver Disable from Output Low tLZ RL = 500Ω, CL = 50pF, SW = VCC (Figure 6) Full - 25, 20 60 ns

NOTES:

8. All currents into device pins are positive; all currents out of device pins are negative. All voltages are referenced to device ground unless otherwise

specified.

9. Applies to peak current. See “Typical Performance Curves” on page 11 for more information.

10. tSKPP is the magnitude of the difference in propagation delays of the specified terminals of two units tested with identical test conditions (VCC,

temperature, etc.).

11. If the driver enable function isn’t needed, connect DE to VCC (or VL) through a 1kΩ to 3kΩ resistor.

12. Parts are 100% tested at +25°C. Over-temperature limits established by characterization and are not production tested.

13. Due to the high short-circuit current at VCC > 3.6V, the outputs must not be shorted outside the range of GND to VCC or damage may occur. To prevent

excessive power dissipation that may damage the output, the short-circuit current should be limited to ≤ 300mA during testing. It is best to use an

external resistor for this purpose, since the current limiting on the VO supply may respond too slowly to protect the output.

14. Typicals are measured at VCC = 3.3V for parameters specified with 3V ≤ VCC ≤ 3.6V, and are measured at VCC = 5V for parameters specified with

4.5V ≤ VCC ≤ 5.5V. If VCC isn’t specified, then a single “TYP” entry applies to both VCC = 3.3V and 5V, and two entries separated by a comma refer to

VCC = 3.3V and 5V, respectively.

Electrical Specifications Test Conditions: VCC = 3.0V to 5.5V, VL = VCC (ISL3296E, ISL3297E, ISL3298E only), typicals are at

TA= +25°C, unless otherwise specified. (Note 8) (Continued)

PARAMETER SYMBOL TEST CONDITIONS

TEMP

(°C)

MIN

(Note 12)

TYP

(Note 14)

MAX

(Note 12)UNIT

ISL3293E, ISL3294E, ISL3295E ISL3296E, ISL3297E, ISL3298E

FN6544 Rev 3.00 Page 8 of 17

September 25, 2015

Test Circuits and Waveforms

FIGURE 4A. VOD AND VOC FIGURE 4B. VOD WITH COMMON-MODE LOAD

FIGURE 4. DC DRIVER TEST CIRCUITS

FIGURE 5A. TEST CIRCUIT FIGURE 5B. MEASUREMENT POINTS

FIGURE 5. DRIVER PROPAGATION DELAY AND DIFFERENTIAL TRANSITION TIMES

FIGURE 6A. TEST CIRCUIT FIGURE 6B. MEASUREMENT POINTS

FIGURE 6. DRIVER ENABLE AND DISABLE TIMES

VCC OR VL

VOD

VOC

RL/2

VCC OR VL

VOD

375Ω

RL = 60Ω

VCM

-7V TO +12V

VCC OR VL

SIGNAL

GENERATOR

RDIFF

OUT (Z)

3V OR VL

50%50%

VOH

VOL

OUT (Y)

tSD1 tSD2

DIFF OUT (Y - Z)

+VOD

-VOD

90% 90%

10% 10%

50%50%

50%

tDDLH tDDHL

50%

DI Z

VCC

GND

PARAMETER OUTPUT DI SW

tHZ Y/Z 1/0 GND

tLZ Y/Z 0/1 VCC

tZH Y/Z 1/0 GND

tZL Y/Z 0/1 VCC

SIGNAL

GENERATOR

500Ω

50pF

OUT (Y, Z)

3V OR VL

50%50%

VOH

VOH - 0.25V

tHZ

OUT (Y, Z)

VCC

VOL

VOL + 0.25V

tLZ

OUTPUT HIGH

OUTPUT LOW

tZL

tZH

50%

ISL3293E, ISL3294E, ISL3295E ISL3296E, ISL3297E, ISL3298E

FN6544 Rev 3.00 Page 9 of 17

September 25, 2015

Application Information

RS-485 and RS-422 are differential (balanced) data

transmission standards for use in long haul or noisy

environments. RS-422 is a subset of RS-485, so RS-485

transmitters and receivers are also RS-422 compliant. RS-422 is

a point-to-multipoint (multidrop) standard, which allows only one

driver and up to 10 (assuming one unit load devices) receivers on

each bus. RS-485 is a true multipoint standard, which allows up

to 32 one unit load devices (any combination of drivers and

receivers) on each bus. To allow for multipoint operation, the

RS-485 specification requires that drivers must handle bus

contention without sustaining any damage.

Another important advantage of RS-485 is the extended

Common-Mode Range (CMR), which specifies that the driver

outputs and receiver inputs withstand signals that range from

+12V to -7V. RS-422 and RS-485 are intended for runs as long as

4000’, so the wide CMR is necessary to handle ground potential

differences, as well as voltages induced in the cable by external

fields.

Driver Features

These RS-485/RS-422 drivers are differential output devices that

delivers at least 1.5V across a 54Ω load (RS-485) and at least 2V

across a 100Ω load (RS-422). The drivers feature low

propagation delay skew to maximize bit width and to minimize

EMI.

All drivers are tri-statable via the active high DE input. If the Tx

enable function is not needed, tie DE to VCC (or VL) through a 1kΩ

to 3kΩ resistor.

The 250kbps and 500kbps driver outputs are slew rate limited to

minimize EMI, and to reduce reflections in unterminated or

improperly terminated networks. Outputs of the ISL3295E and

ISL3298E drivers are not limited, so faster output transition

times allow data rates of at least 20Mbps.

Wide Supply Range

The ISL3293E through ISL3298E are optimized for 3.3V

operation, but can be operated with supply voltages as high as

5.5V. These devices meet the RS-422 and RS-485

specifications for supply voltages less than 4V, and are RS-422

and RS-485 compatible for supplies greater than 4V. Operation

at +125°C requires VCC ≤ 3.6V, while 5V operation requires

adding output current limiting resistors (as described in the

“Driver Overload Protection” on page 10) if output short-circuits

(e.g., from bus contention) are a possibility.

5.5V Tolerant Logic Pins

Logic input pins (DI, DE) contain no ESD nor parasitic diodes to

VCC (nor to VL), so they withstand input voltages exceeding 5.5V

regardless of the VCC and VL voltages.

Logic Supply (VL Pin, ISL3296E through

ISL3298E)

Note: If powered from separate supplies, power-up VCC before

powering up the VL supply and keep VL ≤ VCC.

The ISL3296E through ISL3298E include a VL pin that powers the

logic inputs (DI and DE). These pins interface with “logic” devices

such as UARTs, ASICs, and µcontrollers, and today most of these

devices use power supplies significantly lower than 3.3V. Thus,

the logic device’s low VOH might not exceed the VIH of a 3.3V or

5V powered DI or DE input. Connecting the VL pin to the power

supply of the logic device (as shown in Figure 8) reduces the DI

and DE input switching points to values compatible with the logic

device’s output levels. Tailoring the logic pin input switching

points and output levels to the supply voltage of the UART, ASIC,

or µcontroller eliminates the need for a level shifter/translator

between the two ICs.

FIGURE 7A. TEST CIRCUIT FIGURE 7B. MEASUREMENT POINTS

FIGURE 7. DRIVER DATA RATE

Test Circuits and Waveforms (Continued)

VCC OR VL

SIGNAL

GENERATOR

CDVOD

54Ω

3V OR VL

DIFF OUT (Y - Z) +VOD

-VOD

ISL3293E, ISL3294E, ISL3295E ISL3296E, ISL3297E, ISL3298E

FN6544 Rev 3.00 Page 10 of 17

September 25, 2015

VL can be anywhere from VCC down to 1.35V, but the input

switching points may not provide enough noise margin and

20Mbps data rates may not be achievable, when VL<1.5V.

Table 2 indicates typical VIH and VIL values for various VL settings

so the user can ascertain whether or not a particular VL voltage

meets his needs.

The VL supply current (IL) is typically much less than 20µA, as

shown in Figure 12 on page 11, when DE and DI are

above/below VIH/VIL.

Hot Plug Function

When a piece of equipment powers up, there is a period of time

where the processor or ASIC driving the RS-485 control line (DE)

is unable to ensure that the RS-485 Tx outputs are kept disabled.

If the equipment is connected to the bus, a driver activating

prematurely during power-up may crash the bus. To avoid this

scenario, the ISL329xE family incorporates a “Hot Plug” function.

During power-up, circuitry monitoring VCC ensures that the Tx

outputs remain disabled for a period of time, regardless of the state

of DE. This gives the processor/ASIC a chance to stabilize and drive

the RS-485 control lines to the proper states.

ESD Protection

All pins on these devices include class 3 (8kV) Human Body

Model (HBM) ESD protection structures, but the RS-485 pins

(driver outputs) incorporate advanced structures allowing them

to survive ESD events in excess of ±16.5kV HBM and ±7kV to

the IEC61000 contact test method. The RS-485 pins are

particularly vulnerable to ESD damage because they typically

connect to an exposed port on the exterior of the finished

product. Simply touching the port pins, or connecting a cable,

can cause an ESD event that might destroy unprotected ICs.

These new ESD structures protect the device whether or not it is

powered up and without degrading the RS-485 common-mode

range of -7V to +12V. This built-in ESD protection eliminates the

need for board level protection structures (e.g., transient

suppression diodes) and the associated, undesirable capacitive

load they present.

Data Rate, Cables and Terminations

RS-485/RS-422 are intended for network lengths up to 4000’,

but the maximum system data rate decreases as the

transmission length increases. Devices operating at 20Mbps are

limited to lengths less than 100’, while the 250kbps versions can

operate at full data rates with lengths of several 1000’.

Twisted pair is the cable of choice for RS-485/RS-422 networks.

Twisted pair cables tend to pick up noise and other

electromagnetically induced voltages as common-mode signals,

which are effectively rejected by the differential receivers in

these ICs.

Proper termination is imperative, when using the 20Mbps

devices, to minimize reflections. Short networks using the

250kbps versions need not be terminated, but, terminations are

recommended unless power dissipation is an overriding concern.

In point-to-point, or point-to-multipoint (single driver on bus)

networks, the main cable should be terminated in its

characteristic impedance (typically 120Ω) at the end farthest

from the driver. In multireceiver applications, stubs connecting

receivers to the main cable should be kept as short as possible.

Multipoint (multidriver) systems require that the main cable be

terminated in its characteristic impedance at both ends. Stubs

connecting a transmitter or receiver to the main cable should be

kept as short as possible.

Driver Overload Protection

As stated previously, the RS-485 specification requires that

drivers survive worst case bus contentions undamaged. These

drivers meet this requirement, for VCC ≤ 3.6V, via driver output

short-circuit current limits and on-chip thermal shutdown

circuitry.

The driver output stages incorporate short-circuit current limiting

circuitry, which ensures that the output current never exceeds the

RS-485 specification, for VCC ≤ 3.6V, even at the common-mode

voltage range extremes. Additionally, these devices utilize a

foldback circuit which reduces the short-circuit current and thus

the power dissipation, whenever the contending voltage exceeds

either VCC or GND.

TABLE 2. VIH AND VIL vs VL FOR VCC = 3.3V OR 5V

VL (V) VIH (V) VIL (V)

1.35 0.7 0.4

1.5 0.8 0.5

1.8 0.9 0.7

2.3 1.1 1.0

2.7 1.3 1.1

3.3 1.5 1.4

5.0 (i.e., VCC)2.7 2.3

FIGURE 8. USING VL PIN TO ADJUST LOGIC LEVELS

GND

TXD

DEN

VCC = +2V

UART/PROCESSOR

GND

VCC = +3.3V

ISL3293E

VOH ≤ 2V

VIH ≥ 2V

GND

TXD

DEN

VCC = +2V

UART/PROCESSOR

GND

VCC = +3.3V

ISL3296E

VOH ≤ 2V

VIH = 1.4V

VOH ≤ 2V

VIH ≥ 2V

VOH ≤ 2V

ISL3293E, ISL3294E, ISL3295E ISL3296E, ISL3297E, ISL3298E

FN6544 Rev 3.00 Page 11 of 17

September 25, 2015

In the event of a major short-circuit condition, devices also include

a thermal shutdown feature that disables the drivers whenever the

die temperature becomes excessive. This eliminates the power

dissipation, allowing the die to cool. The drivers automatically

reenable after the die temperature drops about +20°C. If the

contention persists, the thermal shutdown/reenable cycle repeats

until the fault is cleared.

At VCC > 3.6V, the instantaneous short-circuit current is high

enough that output stage damage may occur during short-circuit

conditions to voltages outside of GND to VCC, before the

short-circuit limiting and thermal shutdown activate. For

VCC = 5V operation, if output short-circuits are a possibility

(e.g., due to bus contention), it is recommended that a 5Ω

resistor be inserted in series with each output. This resistor limits

the instantaneous current below levels that can cause damage.

The driver VOD at VCC = 5V is so large that this small added

resistance has little impact.

High Temperature Operation

Due to power dissipation and instantaneous output short-circuit

current levels at VCC = 5V, these transmitters may not be

operated at +125°C with VCC > 3.6V.

At VCC = 3.6V, even the SOT-23 versions may be operated at

+125°C, while driving a 100’, double terminated, CAT 5 cable at

20Mbps, without triggering the thermal SHDN circuit.

Low Power Shutdown Mode

These BiCMOS transmitters all use a fraction of the power

required by their bipolar counterparts, but they also include a

shutdown feature that reduces the already low quiescent ICC to a

1µA trickle. These devices enter shutdown whenever the driver

disables (DE = GND).

Typical Performance Curves VCC = VL = 3.3V, TA = +25°C, unless otherwise specified.

FIGURE 9. DRIVER OUTPUT CURRENT vs DIFFERENTIAL OUTPUT

VOLTAGE

FIGURE 10. DRIVER DIFFERENTIAL OUTPUT VOLTAGE vs

TEMPERATURE

FIGURE 11. SUPPLY CURRENT vs TEMPERATURE FIGURE 12. VL SUPPLY CURRENT vs LOGIC PIN VOLTAGE

DIFFERENTIAL OUTPUT VOLTAGE (V)

DRIVER OUTPUT CURRENT (mA)

0 0.5 1.0 1.5 2.0 2.5 3.0 3.5

100

110

+25°C

+85°C

+125°C

+25°C

1.5

1.6

1.7

1.8

1.9

2.0

2.1

2.2

2.3

2.4

-40 10 60 110

TEMPERATURE (°C)

DIFFERENTIAL OUTPUT VOLTAGE (V)

-15 35 85

RDIFF = 54Ω

RDIFF = 100Ω

125

TEMPERATURE (°C)

ICC (µA)

-40 10 60 110

-15 35 85 125

DE = VCC = VL

100

024

DI VOLTAGE (V)

IL (µA)

135677.5

VL = 3.3V

= 3.3V

VL ≤ 2V

VL = 2.5V

ISL3293E, ISL3294E, ISL3295E ISL3296E, ISL3297E, ISL3298E

FN6544 Rev 3.00 Page 12 of 17

September 25, 2015

FIGURE 13. DRIVER DIFFERENTIAL PROPAGATION DELAY vs

TEMPERATURE (ISL3293E, ISL3296E)

FIGURE 14. DRIVER SKEW vs TEMPERATURE (ISL3293E,

ISL3296E)

FIGURE 15. DRIVER DIFFERENTIAL PROPAGATION DELAY vs

TEMPERATURE (ISL3294E, ISL3297E)

FIGURE 16. DRIVER SKEW vs TEMPERATURE (ISL3294E,

ISL3297E)

FIGURE 17. DRIVER DIFFERENTIAL PROPAGATION DELAY vs

TEMPERATURE (ISL3295E, ISL3298E)

FIGURE 18. DRIVER DIFFERENTIAL SKEW vs TEMPERATURE

(ISL3295E, ISL3298E)

Typical Performance Curves VCC = VL = 3.3V, TA = +25°C, unless otherwise specified. (Continued)

TEMPERATURE (°C)

PROPAGATION DELAY (ns)

-40 10 60 110

-15 35 85 125

tDDHL

1050

1075

1100

1125

1150

1175

1200

1225

1250

tDDLH

VL = 1.35V TO VCC

TEMPERATURE (°C)

SKEW (ns)

-40 10 60 110-15 35 85 125

tDSK

tSSK

100

200

300

400

500

600

700

VL = 1.35V TO VCC

TEMPERATURE (°C)

PROPAGATION DELAY (ns)

-40 10 60 110-15 35 85 125

tDDLH

tDDHL

330

340

350

360

370

380

390

VL = 1.35V TO VCC

TEMPERATURE (°C)

SKEW (ns)

-40 10 60 110-15 35 85 125

tDSK

tSSK

VL = 1.35V TO VCC

TEMPERATURE (°C)

PROPAGATION DELAY (ns)

-40 10 60 110-15 35 85 125

VL = 1.35V, tDDLH

VL = 1.35V, tDDHL

VL = 1.8V, tDDLH, tDDHL

VL = VCC, tDDLH, tDDHL

VL = 1.5V, tDDLH, tDDHL

TEMPERATURE (°C)

SKEW (ns)

-40 10 60 110-15 35 85 125

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

4.5

VL = 1.35V

VL = 1.5V

VL ≥ 1.8V

ISL3293E, ISL3294E, ISL3295E ISL3296E, ISL3297E, ISL3298E

FN6544 Rev 3.00 Page 13 of 17

September 25, 2015

FIGURE 19. DRIVER SINGLE-ENDED SKEW vs TEMPERATURE

(ISL3295E, ISL3298E)

FIGURE 20. DRIVER OUTPUT CURRENT vs SHORT-CIRCUIT

VOLTAGE

FIGURE 21. DRIVER WAVEFORMS, LOW-TO-HIGH

(ISL3293E, ISL3296E)

FIGURE 22. DRIVER WAVEFORMS, HIGH-TO-LOW

(ISL3293E, ISL3296E)

FIGURE 23. DRIVER WAVEFORMS, LOW-TO-HIGH

(ISL3294E, ISL3297E)

FIGURE 24. DRIVER WAVEFORMS, HIGH-TO-LOW

(ISL3294E, ISL3297E)

Typical Performance Curves VCC = VL = 3.3V, TA = +25°C, unless otherwise specified. (Continued)

TEMPERATURE (°C)

SKEW (ns)

-40 10 60 110-15 35 85 125

VL = 1.35V

VL = 1.5V

VL ≥ 1.8V

OUTPUT VOLTAGE (V)

-7 -6 -4 -2 0 2 4 6 8 10 12

OUTPUT CURRENT (mA)

-50

100

150

200

-100

-150

Y OR Z = HIGH

Y OR Z = LOW

ISL329xE

OTHER ISL329xE

ISL3295E/ISL3298E

TIME (400ns/DIV)

DRIVER OUTPUT (V)

RDIFF = 54Ω, CD = 50pF

1.5

3.0

DRIVER OUTPUT (V)

DRIVER INPUT (V)

-3

-2

-1

Y - Z

TIME (400ns/DIV)

DRIVER OUTPUT (V)

RDIFF = 54Ω, CD = 50pF

1.5

3.0

DRIVER OUTPUT (V)

DRIVER INPUT (V)

-3

-2

-1

Y - Z

TIME (200ns/DIV)

DRIVER OUTPUT (V)

RDIFF = 54Ω, CD = 50pF

1.5

3.0

DRIVER OUTPUT (V)

DRIVER INPUT (V)

-3

-2

-1

Y - Z

TIME (200ns/DIV)

DRIVER OUTPUT (V)

RDIFF = 54Ω, CD = 50pF

1.5

3.0

DRIVER OUTPUT (V)

DRIVER INPUT (V)

-3

-2

-1

Y - Z

ISL3293E, ISL3294E, ISL3295E ISL3296E, ISL3297E, ISL3298E

FN6544 Rev 3.00 Page 14 of 17

September 25, 2015

FIGURE 25. DRIVER WAVEFORMS, LOW-TO-HIGH

(ISL3295E, ISL3298E)

FIGURE 26. DRIVER WAVEFORMS, HIGH-TO-LOW

(ISL3295E, ISL3298E)

FIGURE 27. DRIVER WAVEFORMS, LOW-TO-HIGH

(ISL3295E, ISL3298E)

FIGURE 28. DRIVER WAVEFORMS, HIGH-TO-LOW

(ISL3295E, ISL3298E)

Die Characteristics

SUBSTRATE AND TDFN THERMAL PAD POTENTIAL

(POWERED UP):

GND

TRANSISTOR COUNT:

516

PROCESS:

Si Gate BiCMOS

Typical Performance Curves VCC = VL = 3.3V, TA = +25°C, unless otherwise specified. (Continued)

TIME (10ns/DIV)

DRIVER OUTPUT (V)

RDIFF = 54Ω, CD = 50pF

1.5

3.0

DRIVER OUTPUT (V)

DRIVER INPUT (V)

-3

-2

-1

Y - Z

TIME (10ns/DIV)

DRIVER OUTPUT (V)

RDIFF = 54Ω, CD = 50pF

1.5

3.0

DRIVER OUTPUT (V)

DRIVER INPUT (V)

-3

-2

-1

Y - Z

TIME (10ns/DIV)

DRIVER OUTPUT (V)

RDIFF = 54Ω CD = 50pF

1.5

3.0

DRIVER OUTPUT (V)

DRIVER INPUT (V)

-3

-2

-1

Y - Z

VL = 1.35V

TIME (10ns/DIV)

DRIVER OUTPUT (V)

RDIFF = 54Ω, CD = 50pF

1.5

3.0

DRIVER OUTPUT (V)

DRIVER INPUT (V)

-3

-2

-1

Y - Z

VL = 1.35V

FN6544 Rev 3.00 Page 15 of 17

September 25, 2015

ISL3293E, ISL3294E, ISL3295E ISL3296E, ISL3297E, ISL3298E

Intersil products are manufactured, assembled and tested utilizing ISO9001 quality systems as noted

in the quality certifications found at www.intersil.com/en/support/qualandreliability.html

Intersil products are sold by description only. Intersil may modify the circuit design and/or specifications of products at any time without notice, provided that such

modification does not, in Intersil's sole judgment, affect the form, fit or function of the product. Accordingly, the reader is cautioned to verify that datasheets are

current before placing orders. Information furnished by Intersil is believed to be accurate and reliable. However, no responsibility is assumed by Intersil or its

subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or

otherwise under any patent or patent rights of Intersil or its subsidiaries.

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For additional products, see www.intersil.com/en/products.html

All trademarks and registered trademarks are the property of their respective owners.

About Intersil

Intersil Corporation is a leading provider of innovative power management and precision analog solutions. The company's products

address some of the largest markets within the industrial and infrastructure, mobile computing and high-end consumer markets.

For the most updated datasheet, application notes, related documentation and related parts, please see the respective product

information page found at www.intersil.com.

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Reliability reports are also available from our website at www.intersil.com/support

Revision History

The revision history provided is for informational purposes only and is believed to be accurate, but not warranted. Please go to the web to make sure that

you have the latest revision.

DATE REVISION CHANGE

September 25, 2015 FN6544.3 On page 1, table 1, for ISL3293E entry, added "Recommended replacement: ISL32613E" after "No longer

available or supported". For ISL3294E entry, added "Recommended replacement: ISL32614E" after "No

longer available or supported".

On page 3, "Ordering Information" table, for ISL3293E entries (rows 1 and 2), added "Recommended

replacement: ISL32613E" after "No longer available or supported". For ISL3294E entries (rows 3 and 4),

added "Recommended replacement: ISL32614E" after "No longer available or supported".

July 27, 2015 FN6544.2 Table 1 Summary of Features on page 1, added “No longer available or supported” to ISL3293E, ISL3294E,

ISL3296E, ISL3297E.

Ordering Information table on page 3, added “No longer available or supported” to the following parts:

ISL3293E and ISL3294E (1st 4 rows) and to ISL3296E and ISL3297E (rows 7-10).

Electrical Spec table, added “(Parts no longer available or supported)” to DRIVER SWITCHING

CHARACTERISTICS sections on page 6 (for parts ISL3293E, ISL3296E and ISL3294E, ISL3297E).

POD on page 16, updated from ref 1 to rev 2. Changes since rev 1:

Tiebar Note updated

From: Tiebar shown (if present) is a non-functional feature.

To: Tiebar shown (if present) is a non-functional feature and may be located on any of the 4 sides (or ends).

December 11, 2014 FN6544.1 Updated entire datasheet to Intersil new standard.

Added text in several places to clarify that VL can be connected to Vcc.

Updated PODs P6.064 and L8.2x3A to latest revisions with changes as follows:

Updated to new POD format by removing table listing dimensions and moving dimensions onto drawing.

Added Typical Recommended Land Pattern.

September 19, 2007 FN6544.0 Initial Release.