XR33155HD-F - EXAR - Datasheet.Live

±60V Fault Tolerant 3.0V to 5.5V

RS-485/RS-422 Transceivers

XR33152/XR33155/XR33156/XR33158

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FEATURES

 3.0V to 5.5V operation

 ±60V fault tolerance on analog bus pins

 Extended ±25V common mode operation

 Robust ESD protection:

±15kV HBM (bus pins)

± 4kV HBM (non-bus pins)

 1.65V to 5.5V logic Interface VL pin

(full-duplex package option)

 Invert control to correct for reversed

bus pins

 Enhanced receiver fail-safe protection for

open, shorted or terminated but idle

data lines

 Hot swap glitch protection on DE and

RE pins

 Driver short-circuit current limit and

thermal shutdown for overload protection

 Reduced unit loads allows up to 320

devices on bus

 Industry standard 8-pin and 14-pin

NSOIC packages

 -40°C to 85°C and -40°C to 105°C ambient

operating temperature ranges

APPLICATIONS

 Industrial control networks

 HVAC networks

 Building and process automation

 Remote utility meter reading

 Energy monitoring and control

 Long or unterminated transmission lines

Typical Application

Description

The XR33152, XR33155, XR33156 and XR33158 (XR3315x) family of

high performance RS-485/RS-422 devices are designed for improved

performance in noisy industrial environments and increased tolerance

to system faults.

The analog bus pins can withstand direct shorts up to ±60V and are

protected against ESD events up to ±15kV HBM. An extended ±25V

common mode operating range allows for more reliable operation in

noisy environments.

The XR3315x receivers include full fail-safe circuitry, guaranteeing a

logic high receiver output when the receiver inputs are open, shorted

or undriven. The XR33152/55 receiver input impedance is at least

120kΩ (1/10 unit load), allowing more than 320 devices on the bus.

The XR33156/58 receiver input impedance is at least 30kΩ (1/2.5

unit load), allowing more than 80 devices on the bus.

The drivers are protected by short circuit detection as well as thermal

shutdown and maintain high impedance in shutdown or when powered

off. The XR33152 driver is slew limited for reduced EMI and error-free

communication over long or unterminated data cables.

The XR3315x family of high performance RS-485/RS-422 devices are

designed for improved performance in noisy industrial environments

and increased tolerance to system faults.

The devices with DE and RE pins include hot swap circuitry to prevent

false transitions on the bus during power up or live insertion and can

enter a 1nA low current shutdown mode for extreme power savings.

Figure 1. Typical Application

5V 5V

60V POWER BUS

FAULT TOLERANT UP TO 60V

Ordering Information - Page 20

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Absolute Maximum Ratings

Stresses beyond the limits listed below may cause

permanent damage to the device. Exposure to any Absolute

Maximum Rating condition for extended periods may affect

device reliability and lifetime.

VCC ..................................................................................-0.3V to 7.0V

VL ...........................................................................VL ≤ VCC

Input voltage at control and driver input (DE, DI and INV)

XR33152/55/58 .................................. -0.3V to (VCC + 0.3V)

Receiver output voltage (RO)

XR33152/55/58 .................................. -0.3V to (VCC + 0.3V)

Input voltage at control (RE) XR33156

..............................................................-0.3V to (VL + 0.3V)

Input voltage at control and driver input

(DE, DI, RINV, DINV, and INV) XR33156 ......... -0.3V to 7.0V

Receiver output voltage (RO)

XR33156 ...............................................-0.3V to (VL + 0.3V)

Driver output voltage (Y, Z, A/Y and B/Z) .................... ±60V

Receiver input voltage (A, B, A/Y and B/Z) .................±60V

Transient voltage pulse, through 100Ω (Figure 7) ..... ±100V

Driver output current ...............................................±250mA

Storage temperature range ......................... -65°C to 150°C

Lead temperature (soldering 10 seconds) ................. 300°C

Maximum junction temperature ................................. 150°C

ESD Ratings

HBM - Human Body Model (A, B, Y and Z pins) ....... ±15kV

HBM - Human Body Model (all other pins) .................. ±4kV

Operating Conditions

Supply voltage range ........................................3.0V to 5.5V

Operating temperature range ...................... -40°C to 105°C

Package power dissipation,

8-pin NSOIC θ

JA ................................................. 128.4°C/W

Package power dissipation,

14-pin NSOIC θ

JA .................................................... 86°C/W

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Electrical Characteristics

Unless otherwise noted: VCC = 3.0V to 5.5V, TA = TMIN to TMAX. Typical values are at VCC = 5.0V, TA = 25°C.

Symbol Parameter Conditions Min Typ Max Units

Driver DC Characteristics

VCC Supply voltage range 3.0 5.5 V

VLI/O logic supply voltage range VL ≤ VCC 1.65 5.5 V

VOD Differential driver output,

4.5V ≤ VCC ≤ 5.5V

RL = 100Ω (RS-422), Figure 4 2 VCC V

RL = 54Ω (RS-485), Figure 4 1.5 VCC V

-25V ≤ VCM ≤ 25V, Figure 5 1.5 VCC V

VOD Differential driver output,

3.0V ≤ VCC ≤ 4.5V

RL = 100Ω (RS-422), Figure 4 0.85 VCC V

RL = 54Ω (RS-485), Figure 4 0.65 VCC V

∆VOD

Change in magnitude of

differential output voltage, Note 1

RL = 100Ω (RS-422) or

RL = 54Ω (RS-485), Figure 4

±0.2 V

VCM Driver common-mode output

voltage (steady state) 1 3 V

∆VCM

Change in magnitude of common-mode

output voltage, Note 1 ±0.2 V

VIH Logic high input thresholds

(DI, DE and INV)

VCC = 3.3V, for XR33152/55/58 2.0 V

VCC = 5.0V, for XR33152/55/58 2.4 V

VIL Logic low input thresholds

(DI, DE and INV) For XR33152/55/58 0.8 V

VIH Logic high input thresholds

(DI, DE, RE, DINV and RINV)VL ≤ VCC, for XR33156 (2/3)VLV

VIL Logic low input thresholds

(DI, DE, RE, DINV and RINV)VL ≤ VCC, for XR33156 (1/3)VLV

VHYS Input hysteresis

(DI, DE, RE, DINV, RINV and INV) 100 mV

IIN

Logic input current (DI, DE and RE) 0V ≤ VIN ≤ VCC, for XR33152/55/58

After first transition, Note 2 ±1 μA

Logic input current (INV) VIN = VCC = 5.5V, for XR33152/55/58 25 33 55 μA

Logic input current (DI, DE and RE) 0V ≤ VIN ≤ VL = VCC = 5.5V, for XR33156

After first transition, Note 2 ±1 μA

Logic input current (DINV and RINV) VIN = VL = VCC = 5.5V, for XR33156 25 33 55 μA

IINHS Logic input current hot swap (DE and RE) Until first transition, Note 2 100 ±200 μA

IA, B Input current (A and B)

VCC = 0V or 5.5V, VOUT = 12V,

DE = 0V, for XR33152/55 100 μA

VCC = 0V or 5.5V, VOUT = -7V,

DE = 0V, for XR33152/55 -80 μA

VOUT = 12V, DE = 0V,

VCC = 0V or 5.5V, for XR33156/58 400 μA

VOUT = -7V, DE = 0V,

VCC = 0V or 5.5V, for XR33156/58 -320 μA

NOTES:

1. Change in magnitude of differential output voltage and change in magnitude of common mode output voltage are the changes in output voltage when DI input

changes state.

2. The hot swap feature disables the DE and RE inputs for the first 10μs after power is applied. Following this time period, these inputs are weakly pulled to their disabled

state (low for DE, high for RE) until the first transition, after which they become high impedance inputs.

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Electrical Characteristics (Continued)

Unless otherwise noted: VCC = 3.0V to 5.5V, TA = TMIN to TMAX. Typical values are at VCC = 5.0V, TA = 25°C.

Symbol Parameter Conditions Min Typ Max Units

IOL Output leakage (Y and Z)

Full-duplex

VOUT = 12V, DE = 0V, VCC = 0V or 5.5V 100 μA

VOUT = -7V, DE = 0V, VCC = 0V or 5.5V -80 μA

IOSD Driver short-circuit output current -60V ≤ VOUT ≤ 60V, Figure 6 ±250 mA

Driver Thermal Characteristics

TTS Thermal shutdown temperature Junction temperature, Note 1 175 °C

TTSH Thermal shutdown hysteresis Note 1 15 °C

Receiver DC Characteristics

VSTH Receiver differential input signal threshold

voltage (VA - VB)-25V ≤ VOUT ≤ 25V ±85 ±200 mV

∆VSTH

Receiver differential input

signal hysteresis 170 mV

VFSTH- Negative going receiver differential input

failsafe threshold voltage (VA - VB)-25V ≤ VOUT ≤ 25V -200 -125 -40 mV

VFSTH+ Positive going receiver differential input

failsafe threshold voltage (VA - VB)-25V ≤ VOUT ≤ 25V -100 -10 mV

∆VFSTH

Receiver differential input

failsafe hysteresis 25 mV

VOH Receiver output high voltage (RO) IOUT = -4mA, for XR33152/55/58 VCC - 0.6 V

VOL Receiver output low voltage (RO) IOUT = 4mA, for XR33152/55/58 0.4 V

VOH Receiver output high voltage (RO)

3.0V ≤ VL ≤ 5.5V, IOUT = -4mA,

1.6V ≤ VL ≤ 3.0V, IOUT = -1mA,

for XR33156

VL - 0.6 V

VOL Receiver output low voltage (RO)

3.0V ≤ VL ≤ 5.5V, IOUT = 4mA,

1.6V ≤ VL ≤ 3.0V, IOUT = 1mA,

for XR33156

0.4 V

IOZR High-Z receiver output current 0V ≤ VOUT ≤ VCC, for XR33152/55/58

0V ≤ VOUT ≤ VL, for XR33156 ±1 μA

RIN RX input resistance

-25V ≤ VCM ≤ 25V, for XR33152/55 120 kΩ

-25V ≤ VCM ≤ 25V, for XR33156/58 30 kΩ

IOSC

RX output short-circuit current 0V ≤ VRO ≤ VCC, for XR33152/55/58 110 mA

RX output short-circuit current 0V ≤ VRO ≤ VL, for XR33156 110 mA

Supply Current

ICC Supply current No load, RE = 0V or VCC,

DE = VCC, DI = 0V or VCC 4 mA

ISHDN Supply current in shutdown mode RE = VCC, DE = 0V 0.001 1 μA

NOTES:

1. This spec is guaranteed by design and bench characterization.

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Electrical Characteristics (Continued)

Driver AC Characteristics - XR33152 (250kbps)

Unless otherwise noted: VCC = 3.0V to 5.5V, TA = TMIN to TMAX. Typical values are at VCC = 5.0V, TA = 25°C.

Symbol Parameter Conditions Min Typ Max Units

tDPLH Driver propagation delay (low to high)

CL = 50pF, RL = 54Ω, Figure 7

350 1500 ns

tDPHL Driver propagation delay (high to low) 350 1600 ns

|tDPLH-tDPHL|Differential driver output skew 20 200 ns

tDR, tDF Driver differential output rise or fall time 400 1500 ns

Maximum data rate 1/tUI, duty cycle 40% to 60% 250 kbps

tDZH Driver enable to output high

CL = 50pF, RL = 500Ω, Figure 8

200 2500 ns

tDZL Driver enable to output low 200 2500 ns

tDHZ Driver disable from output high 250 ns

tDLZ Driver disable from output low 250 ns

tRZH(SHDN) Driver enable from shutdown to

output high CL = 50pF, RL = 500Ω, Figure 8

5500 ns

tRZL(SHDN) Driver enable from shutdown to

output low 5500 ns

tSHDN Time to shutdown Notes 1 and 2 50 200 600 ns

Receiver AC Characteristics -XR33152 (250kbps)

Unless otherwise noted: VCC = 3.0V to 5.5V, TA = TMIN to TMAX. Typical values are at VCC = 5.0V, TA = 25°C.

Symbol Parameter Conditions Min Typ Max Units

tRPLH Receiver propagation delay (low to high)

CL = 15pF, VID = ±2V, VID rise and

fall times < 15ns, Figure 9

200 ns

tRPHL Receiver propagation delay (high to low) 200 ns

|tRPLH-tRPHL|Receiver propagation delay skew 30 ns

Maximum data rate 1/tUI, duty cycle 40% to 60% 250 kbps

tRZH Receiver enable to output high

CL = 15pF, RL = 1kΩ, Figure 10

50 ns

tRZL Receiver enable to output low 50 ns

tRHZ Receiver disable from output high 50 ns

tRLZ Receiver disable from output low 50 ns

tRZH(SHDN) Receiver enable from shutdown to

output high CL = 15pF, RL = 1kΩ, Figure 10

3500 ns

tRZL(SHDN) Receiver enable from shutdown to

output low 3500 ns

tSHDN Time to shutdown Notes 1 and 2 50 200 600 ns

NOTES:

1. The transceivers are put into shutdown by bringing RE high and DE low simultaneously for at least 600ns. If the control inputs are in this state for less than 50ns, the device

is guaranteed to not enter shutdown. If the enable inputs are held in this state for at least 600ns, the device is ensured to be in shutdown. Note that the receiver and driver

enable times increase significantly when coming out of shutdown.

2. This spec is guaranteed by design and bench characterization.

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Electrical Characteristics (Continued)

Driver AC Characteristics - XR33155 (1Mbps)

Unless otherwise noted: VCC = 3.0V to 5.5V, TA = TMIN to TMAX. Typical values are at VCC = 5.0V, TA = 25°C.

Symbol Parameter Conditions Min Typ Max Units

tDPLH Driver propagation delay (low to high)

CL = 50pF, RL = 54Ω, Figure 7

150 500 ns

tDPHL Driver propagation delay (high to low) 150 500 ns

|tDPLH-tDPHL|Differential driver output skew 5 50 ns

tDR, tDF Driver differential output rise or fall time 100 200 300 ns

Maximum data rate 1/tUI, duty cycle 40% to 60% 1 Mbps

tDZH Driver enable to output high

CL = 50pF, RL = 500Ω, Figure 8

1000 2500 ns

tDZL Driver enable to output low 1000 2500 ns

tDHZ Driver disable from output high 250 ns

tDLZ Driver disable from output low 250 ns

tDZH(SHDN) Driver enable from shutdown to

output high CL = 50pF, RL = 500Ω, Figure 8

2500 4500 ns

tDZL(SHDN) Driver enable from shutdown to

output low 2500 4500 ns

tSHDN Time to shutdown Notes 1 and 2 50 200 600 ns

Receiver AC Characteristics - XR33155 (1Mbps)

Unless otherwise noted: VCC = 3.0V to 5.5V, TA = TMIN to TMAX. Typical values are at VCC = 5.0V, TA = 25°C.

Symbol Parameter Conditions Min Typ Max Units

tRPLH Receiver propagation delay (low to high)

CL = 15pF, VID = ±2V, VID rise and

fall times < 15ns, Figure 9

200 ns

tRPHL Receiver propagation delay (high to low) 200 ns

|tRPLH-tRPHL|Receiver propagation delay skew 30 ns

Maximum data rate 1/tUI, duty cycle 40% to 60% 1 Mbps

tRZH Receiver enable to output high

CL = 15pF, RL = 1kΩ, Figure 10

50 ns

tRZL Receiver enable to output low 50 ns

tRHZ Receiver disable from output high 50 ns

tRLZ Receiver disable from output low 50 ns

tRZH(SHDN) Receiver enable from shutdown to

output high CL = 15pF, RL = 1kΩ, Figure 10

3500 ns

tRZL(SHDN) Receiver enable from shutdown to

output low 3500 ns

tSHDN Time to shutdown Notes 1 and 2 50 200 600 ns

NOTES:

1. The transceivers are put into shutdown by bringing RE high and DE low simultaneously for at least 600ns. If the control inputs are in this state for less than 50ns, the device

is guaranteed to not enter shutdown. If the enable inputs are held in this state for at least 600ns, the device is ensured to be in shutdown. Note that the receiver and driver

enable times increase significantly when coming out of shutdown.

2. This spec is guaranteed by design and bench characterization.

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Electrical Characteristics (Continued)

Driver AC Characteristics - XR33156 and XR33158 (20Mbps)

Unless otherwise noted: VCC = 3.0V to 5.5V, TA = TMIN to TMAX. Typical values are at VCC = 5.0V, TA = 25°C.

Symbol Parameter Conditions Min Typ Max Units

tDPLH Driver prop. delay (low to high)

CL = 50pF, RL = 54Ω,

Figure 7

25 ns

tDPHL Driver prop. delay (high to low) 25 ns

|tDPLH-tDPHL|Differential driver output skew 5 ns

tDR, tDF Driver differential output

rise or fall time 15 ns

Maximum data rate 1/tUI, duty cycle 40% to 60% 20 Mbps

tDZH Driver enable to output high

CL = 50pF, RL = 500Ω,

Figure 8

60 ns

tDZL Driver enable to output low 60 ns

tDHZ Driver disable from output high 250 ns

tDLZ Driver disable from output low 250 ns

tDZH(SHDN) Driver enable from shutdown to

output high CL = 50pF, RL = 500Ω,

Figure 8

2200 ns

tDZL(SHDN) Driver enable from shutdown to

output low 2200 ns

tSHDN Time to shutdown Notes 1 and 2 50 200 600 ns

Receiver AC Characteristics - XR33156 and XR33158 (20Mbps)

Unless otherwise noted: VCC = 3.0V to 5.5V, TA = TMIN to TMAX. Typical values are at VCC = 5.0V, TA = 25°C.

Symbol Parameter Conditions Min Typ Max Units

tRPLH Receiver prop. delay (low to high)

CL = 15pF, VID = ±2V,

VID rise and fall times < 15ns,

Figure 9

60 ns

tRPHL Receiver prop. delay (high to low) 60 ns

|tRPLH-tRPHL|Receiver propagation delay skew 5 ns

Maximum data rate 1/tUI, duty cycle 40% to 60% 20 Mbps

tRZH Receiver enable to output high

CL = 15pF, RL = 1kΩ,

Figure 10, for XR33156

50 ns

tRZL Receiver enable to output low 50 ns

tRHZ Receiver disable from output high 50 ns

tRLZ Receiver disable from output low 50 ns

tRZH(SHDN) Receiver enable from shutdown to

output high CL = 15pF, RL = 1kΩ,

Figure 10, for XR33156

2200 ns

tRZL(SHDN) Receiver enable from shutdown to

output low 2200 ns

tSHDN Time to shutdown Notes 1 and 2, for XR33156 50 200 600 ns

NOTES:

1. The transceivers are put into shutdown by bringing RE high and DE low simultaneously for at least 600ns. If the control inputs are in this state for less than 50ns,

the device is guaranteed to not enter shutdown. If the enable inputs are held in this state for at least 600ns, the device is ensured to be in shutdown. Note that the receiver

and driver enable times increase significantly when coming out of shutdown.

2. This spec is guaranteed by design and bench characterization.

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Pin Configurations

Pin Functions

Pin Number

Pin Name Type Description

Half-duplex

XR33152

XR33155

XR33158

Full-duplex

XR33156

- 1 RINV I

Receiver invert control (active high). When enabled, the polarity of the receiver bus

pins (A & B) is reversed: A = inverting and B = non-inverting. When disabled, the

receiver bus pins (A & B) operate normally: A = non-inverting and B = inverting.

The RINV pin has a 150KΩ pull-down resistor.

1 2 RO O

Receiver output, when RE is low and if (A-B) ≥ 200mV, RO is high. If (A-B) ≤ -200mV,

RO is low If inputs are left floating, shorted together or terminated and undriven for

more than 2μs the output is high.

2 - INV I

Driver and receiver invert control (active high). When enabled, the polarity of the driver

input and receiver input bus pins is inverted. When disabled, the driver input and

receiver inputs operate normally: A = non-inverting and B = inverting. The INV pin has

a 150kΩ pull-down resistor.

- 3 RE I

Receiver output enable (hot swap). When RE is low, RO is enabled. When RE is high,

RO is high impedance. RE should be high and DE should be low to enter

shutdown mode.

3 4 DE I

Driver output enable (hot swap). When DE is high, outputs are enabled. When DE is

low, outputs are high impedance. DE should be low and RE should be high to enter

shutdown mode.

4 5 DI I

Driver input. With DE high, a low level on DI forces non-inverting output low and

inverting output high. Similarly, a high level on DI forces non-inverting output high and

inverting output low.

5 6, 7 GND PWR Ground.

6 - A/Y I/O Non-inverting receiver input and non-Inverting driver output.

7 - B/Z I/O Inverting receiver input and Inverting driver output.

NOTE:

Type: I = Input, O = Output, I/O = Input/Output, PWR = Power.

RINV 1

RO 2

RE 3

DE 4

DI 5

GND 6

GND 7

VCC14

VL13

A12

B11

Z10

DINV8

RO 1

INV 2

DE 3

DI 4

VCC8

B/Z7

A/Y6

GND5

XR33152, XR33155 and XR33158 Half-duplex XR33156 Full-duplex

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Pin Functions (Continued)

Pin Number

Pin Name Type Description

Half-duplex

XR33152

XR33155

XR33158

Full-duplex

XR33156

8 14 VCC PWR 3.0V to 5.5V power supply input bypass to ground with 0.1μF capacitor.

- 12 A I Non inverting receiver input.

- 11 B I Inverting receiver input.

- 9 Y O Non-inverting driver output.

- 10 Z O Inverting driver output.

- 8 DINV I

Driver invert control (active high). When enabled, the polarity of the driver input pin is

inverted causing the driver output (Y & Z) polarities to be inverted. When disabled, the

driver bus pins (Y & Z) operate normally: Y = non-inverting and Z = inverting. The DINV

pin has a 150kΩ pull-down resistor.

- 13 VL PWR Logic interface power supply.

NOTE:

Type: I = Input, O = Output, I/O = Input/Output, PWR = Power.

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Pin Functions (Continued)

XR33156 (Full-duplex - 14 Pins)

Transmitting

Inputs Outputs

DINV RE DE DI Y Z

0 X 1 1 1 0

0 X 1 0 0 1

1 X 1 1 0 1

1 X 1 0 1 0

X 0 0 X High-Z

X 1 0 X High-Z (shutdown)

XR33152, XR33155 and XR33158 (Half-duplex - 8 Pins)

Transmitting

Inputs Outputs

INV DE DI A/Y B/Z

0 1 1 1 0

0 1 0 0 1

1 1 1 0 1

1 1 0 1 0

X 0 X High-Z

XR33156 (Full-duplex - 14 Pins)

Receiving

Inputs Output

RINV RE DE VA - VBRO

0 0 X ≥ 200mV 1

0 0 X ≤ -200mV 0

0 0 X Open/shorted 1

1 0 X ≥ 200mV 0

1 0 X ≤ -200mV 1

1 0 X Open/shorted 1

X 1 1 X High-Z

X 1 0 X High-Z (shutdown)

XR33152, XR33155 and XR33158 (Half-duplex - 8 Pins)

Receiving

Inputs Output

INV DE VA - VBRO

0 0 ≥ 200mV 1

0 0 ≤ -200mV 0

1 0 Open/shorted 1

1 0 ≥ +200mV 0

1 0 ≤ -200mV 1

1 0 Open/shorted 1

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Figure 3. Differential Driver Output Voltage

DDI = OV or VCC

DE = VCC

VOD VCM

Figure 4. Differential Driver Output Voltage Over Common Mode

DDI = OV or VCC

DE = VCC

375Ω

60Ω

VOD VCM

Applications Information

RO1

INV 2

DE3

DI4

VCC

B/Z7

A/Y6

GND5

RINV 1

RO 2

RE 3

DE 4

DI 5

GND 6

GND 7

VCC

A12

B11

Z10

DINV

Figure 2. XR33152, XR33155 and XR33158 Half-duplex and XR33156 Full-duplex

XR33152, XR33155 and XR33158 XR33156

XR33152/XR33155/XR33156/XR33158

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Figure 6. Transient Overvoltage Test Circuit

DEVICE POWERED

ON/OFF

A OR Z

B OR Y

VTEST

15 μs DURATION

1% DUTY CYCLE

100Ω±1%

TRANSCEIVER,

GENERATOR,

RECEIVER

Figure 7. Driver Propagation Delay Test Circuit and Timing Diagram

DVOD RLCL

DE = VCC

DI 1.5V 1.5V tSKEW = tDPLH – tDPHL

VOD

(VY - VZ)

10% 90% 10%

90%

tDF

tDR

tDPLH tDPHL

VOD

VOD–

VOD+

Figure 5. Driver Output Short Circuit Current

DDI = OV or VCC

DE = OV or VCC

Y -60V to 60V

IOSD

Applications Information (Continued)

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Applications Information (Continued)

Figure 8. Driver Enable and Disable Timing Test Circuits and Timing Diagrams

D VOUT

RLCL

TESTING Z: DI = OV

TESTING Y: DI = VCC Y

D VOUT

VCC

TESTING Z: DI = VCC

TESTING Y: DI = OV Y

VOUT

DE 1.5V 1.5V

tDZH

VOH + VOL VOH – 0.25V

tDHZ

VOH

VOL

VOUT

DE 1.5V 1.5V

tDZL

VOH + VOL VOL + 0.25V

tDLZ

VOH

VOL

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Applications Information (Continued)

Figure 9. Receiver Propagation Delay Test Circuit and Timing Diagram

R RO

RE = OV

tRPLH

tRPHL

VOH

–1V

+1V

VOL

VCC/2 VCC/2

VID

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Applications Information (Continued)

Figure 10. Receiver Enable and Disable Test Circuits and Timing Diagrams

R RO

RLCL

VCC

R RO

1.5V 1.5V

tRZH

VOH VOH – 0.25V

VA = VCC

VB = OV

tRHZ

VOH

1.5V 1.5V

tRZL

VCC + VOL VOL + 0.25V

tRLZ

VCC

VOL

VA = OV

VB = VCC

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REV2C

Applications Information (Continued)

The XR3315x RS-485/RS-422 devices are part of

MaxLinear’s high performance serial interface product line.

The analog bus pins can survive direct shorts up to ±60V

and are protected against ESD events up to ±15kV.

Enhanced Failsafe

Ordinary RS-485 differential receivers will be in an

indeterminate state whenever the data bus is not being

actively driven. The enhanced failsafe feature of the

XR3315x family guarantees a logic-high receiver output

when the receiver inputs are open, shorted or when they

are connected to a terminated transmission line with all

drivers disabled. In a terminated bus with all transmitters

disabled, the receivers’ differential input voltage is pulled

to 0V by the termination. The XR3315x family interprets

0V differential as a logic high with a minimum 50mV noise

margin while maintaining compliance with the RS-485

standard of ±200mV. Although the XR3315x family does

not need failsafe biasing resistors, it can operate without

issue if biasing is used.

Hot Swap Capability

When VCC is first applied the XR3315x family holds the

driver enable and receiver enable inactive for approximately

10μs. During power ramp-up, other system ICs may drive

unpredictable values or tristated lines may be influenced

by stray capacitance. The hot swap feature prevents the

XR3315x family from driving any output signal until power

has stabilized. After the initial 10μs, the driver and receiver

enable pins are weakly pulled to their disabled states (low

for DE and high for RE) until the first transition. After the first

transition, the DE and RE pins operate as high impedance

inputs.

If circuit boards are inserted into an energized backplane

(commonly called “live insertion” or “hot swap”) power

may suddenly be applied to all circuits. Without the hot

swap capability, this situation could improperly enable the

transceiver’s driver or receiver, driving invalid data onto

shared buses and possibly causing driver contention or

device damage.

Driver Output Protection

Two mechanisms prevent excessive output current and

power dissipation caused by faults or by bus contention.

First, a driver current limit on the output stage provides

immediate protection against short circuits over the whole

common-mode voltage range. Second, a thermal shutdown

circuit forces the driver outputs into a high impedance state

if junction temperature becomes excessive.

Line Length

The RS-485/RS-422 standard covers line lengths up to

4000ft. Maximum achievable line length is a function of

signal attenuation and noise. Termination prevents signal

reflections by eliminating the impedance mismatches on

a transmission line. Line termination is generally used if

rise and fall times are shorter than the round trip signal

propagation time. Higher output drivers may allow longer

cables to be used.

±15kV HBM ESD Protection (Unpowered Part)

ESD protection structures are incorporated on all pins to

protect against electrostatic discharges encountered during

handling and assembly. The driver outputs and receiver

inputs of the XR3315x family have extra protection against

static electricity. MaxLinear uses state-of-the-art structures

to protect these pins against ESD damage:

 ±15kV HBM for bus pins to GND

 ±4kV HBM for all other pins

ESD Test Conditions

ESD performance depends on a variety of conditions.

Contact MaxLinear for a reliability report that documents

test setup, methodology and results.

Maximum Number of Transceivers on the Bus

The standard RS-485 receiver input impedance is 12kΩ (1

unit load). A standard driver can drive up to 32 unit loads.

The XR33152 transceiver has a 1/10th unit load receiver

input impedance of 120kΩ, allowing up to 320 transceivers

to be connected in parallel on a communication line. The

XR33156/58 transceivers have a 1/2.5 unit load receiver

input impedance of 30kΩ, allowing up to 80 transceivers

to be connected in parallel on a communication line. Any

combination of these devices and other RS-485 transceivers

up to a total of 32 unit loads may be connected to the line.

Low Power Shutdown Mode

The XR33156 has a low-power shutdown mode that is

initiated by bringing both RE high and DE low simultaneously.

While in shutdown the XR33156 draws less than 1μA of

supply current. DE and RE may be tied together and driven

by a single control signal. Devices are guaranteed not to

enter shutdown if RE is high and DE is low for less than

50ns. If the inputs are in this state for at least 600ns, the

parts will enter shutdown.

XR33156 enable times, tZH and tZL, apply when the part is

not in low power shutdown state. Enable times, tZH(SHDN)

and tZL(SHDN) apply when the part is shutdown. The driver

and receiver take longer to become enabled from low

power shutdown tZH(SHDN) and tZL(SHDN) than from driver

or receiver disable mode (tZH and tZL).

XR33152/XR33155/XR33156/XR33158

17/21

REV2C

Applications Information (Continued)

Product Selector Guide

Part Number Operation Data Rate Shutdown Receiver/Driver

Enable

Nodes

On Bus Footprint

XR33152 Half-duplex 250kbps

No No/Yes 320 8-NSOIC

XR33155 Half-duplex 1Mbps

XR33156 Full-duplex

20Mbps

Yes Yes/Yes 80 14-NSOIC

XR33158 Half-duplex No No/Yes 80 8-NSOIC

XR33152/XR33155/XR33156/XR33158

18/21

REV2C

Mechanical Dimensions

NSOIC-8

Drawing No:

Revision: A

Side View

Top View

Front View

POD-00000108

XR33152/XR33155/XR33156/XR33158

19/21

REV2C

Mechanical Dimensions

NSOIC-14

Drawing No:

Revision: A

Side View

Top View

Front View

POD-00000109

XR33152/XR33155/XR33156/XR33158

20/21

REV2C

Ordering Information(1)

Part Number Operation Data Rate Operating

Temperature Range Lead-Free Package Packaging Method

XR33152ID-F

Half-duplex 250kbps

-40°C to 85°C

Yes(2)

8-pin SOIC

Tube

XR33152IDTR-F Tape and Reel

XR33152HD-F -40°C to 105°C Tube

XR33152HDTR-F Tape and Reel

XR33155ID-F

Half-duplex 1Mbps

-40°C to 85°C

8-pin SOIC

Tube

XR33155IDTR-F Tape and Reel

XR33155HD-F -40°C to 105°C Tube

XR33155HDTR-F Tape and Reel

XR33156ID-F

Full-duplex 20Mbps

-40°C to 85°C

14-pin SOIC

Tube

XR33156IDTR-F Tape and Reel

XR33156HD-F -40°C to 105°C Tube

XR33156HDTR-F Tape and Reel

XR33158ID-F

Half-duplex 20Mbps

-40°C to 85°C

8-pin SOIC

Tube

XR33158IDTR-F Tape and Reel

XR33158HD-F -40°C to 105°C Tube

XR33158HDTR-F Tape and Reel

XR33152IDEVB

XR33152HDEVB

XR33155IDEVB

XR33155HDEVB

XR33156IDEVB

XR33156HDEVB

XR33158IDEVB

XR33158HDEVB

Evaluation Boards

NOTE:

1. Refer to www.exar.com/XR33152, www.exar.com/XR33155, www.exar.com/XR33156, www.exar.com/XR33158 for most up-to-date Ordering Information.

2. Visit www.exar.com for additional information on Environmental Rating.

XR33152/XR33155/XR33156/XR33158

The content of this document is furnished for informational use only, is subject to change without notice, and should not be construed as a commitment by MaxLinear, Inc.. MaxLinear, Inc. assumes

no responsibility or liability for any errors or inaccuracies that may appear in the informational content contained in this guide. Complying with all applicable copyright laws is the responsibility of the

user. Without limiting the rights under copyright, no part of this document may be reproduced into, stored in, or introduced into a retrieval system, or transmitted in any form or by any means (electronic,

mechanical, photocopying, recording, or otherwise), or for any purpose, without the express written permission of MaxLinear, Inc.

Maxlinear, Inc. does not recommend the use of any of its products in life support applications where the failure or malfunction of the product can reasonably be expected to cause failure of the life support

system or to significantly affect its safety or effectiveness. Products are not authorized for use in such applications unless MaxLinear, Inc. receives, in writing, assurances to its satisfaction that: (a) the

risk of injury or damage has been minimized; (b) the user assumes all such risks; (c) potential liability of MaxLinear, Inc. is adequately protected under the circumstances.

MaxLinear, Inc. may have patents, patent applications, trademarks, copyrights, or other intellectual property rights covering subject matter in this document. Except as expressly provided in any written

license agreement from MaxLinear, Inc., the furnishing of this document does not give you any license to these patents, trademarks, copyrights, or other intellectual property.

Company and product names may be registered trademarks or trademarks of the respective owners with which they are associated.

XR33152/55/56/58_DS_020118 21/21

REV2C

Corporate Headquarters:

5966 La Place Court

Suite 100

Carlsbad, CA 92008

Tel.:+1 (760) 692-0711

Fax: +1 (760) 444-8598

www.maxlinear.com

High Performance Analog:

1060 Rincon Circle

San Jose, CA 95131

Tel.: +1 (669) 265-6100

Fax: +1 (669) 265-6101

Email: serialtechsupport@exar.com

www.exar.com

Revision History

Revision Date Description

1A Jan 2016 Initial Release

2A July 2016 Add XR33155, -40°C to 105°C parts, and Revision History.

2B Jan 2017 Corrected XR33158 max temperature typo

2C Feb 2018 Updated to MaxLinear logo. Updated format and Ordering Information. Moved ESD ratings to page 2.