May 2007 Rev 2 1/18
18
Features
■High speed:
–t
PD = 1.5ns (Typ.) at VCC = 3.0V
–t
PD = 1.5ns (Typ.) at VCC = 2.3V
■Ultra low power dissipation:
–I
CC = 0.2µA (Max.) at TA = 85°C
■Low "ON" resistance:
–R
ON = 0.5Ω (TA = 25ºC) at VCC = 4.3V
–R
ON = 0.6Ω (TA = 25ºC) at VCC = 3.0V
–R
ON = 1.0Ω (TA = 25ºC) at VCC = 1.8V
■Wide operating voltage range:
–V
CC (OPR) = 1.65V to 4.3V single supply
■4.3V Tolerant and 1.8V compatible threshold
on digital control input at VCC = 2.3V to 3.0V
■Latch-up performance exceeds 300mA (JESD
17)
■ESD Performance (Analog Chan. Vs. GND):
HMB >2kV (MIL STD 883 method 3015)
Description
The STG3155 is a high-speed CMOS low voltage
single analog S.P.D.T. (Single Pole Dual Throw)
switch or 2:1 Multiplexer /Demultiplexer switch
fabricated in silicon gate C2MOS technology. It is
designed to operate from 1.65V to 4.3V, making
this device ideal for portable applications.
The device offers very low ON-Resistance
(<0.5Ω) at VCC = 4.3V. The SEL inputs are
provided to control the switch. The switch S1 is
ON (they are connected to common Ports Dn)
when the SEL input is held high and OFF (high
impedance state exists between the two ports)
when SEL is held low; the switch S2 is ON (it is
connected to common Port D) when the SEL
input is held low and OFF (high impedance state
exists between the two ports) when SEL is held
high.
Additional key features are fast switching speed,
break-before-make delay time and Ultra Low
Power Consumption. All inputs and outputs are
equipped with protection circuits against static
discharge, giving them ESD immunity and
transient excess voltage.
DFN6L
STG3155
Low voltage 0.5Ω Max single SPDT switch
with break-before-make feature
www.st.com
Table 1. Device summary
Part number Package Packaging
STG3155DTR DFN6L (1.45mm x 1mm) Tape and Reel
Obsolete Product(s) - Obsolete Product(s)
Obsolete Product(s) - Obsolete Product(s)
Contents STG3155
2/18
Contents
1 Pin connections and functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2 Electrical ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3.1 DC Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3.2 AC Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.3 Analog switch characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.4 Truth table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
4 Typical application circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
5 Test circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
6 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
7 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Obsolete Product(s) - Obsolete Product(s)
STG3155 Pin connections and functions
3/18
1 Pin connections and functions
Figure 1. Pin connections (top through view)
Figure 2. Input equivalent circuit
Table 2. Pin descriptions
Pin NºSymbol Name and function
6, 4 S1, S2 Independent Channels
3 D Common Channels
1 SEL Control
2V
CC Positive Supply Voltage
5 GND Ground (0V)
1
2
3
6
5
4
S
EL
VCC
D
S
2
GN
D
S
1
Obsolete Product(s) - Obsolete Product(s)
Electrical ratings STG3155
4/18
2 Electrical ratings
Stressing the device above the rating listed in the “Absolute Maximum Ratings” table may
cause permanent damage to the device. These are stress ratings only and operation of the
device at these or any other conditions above those indicated in the Operating sections of
this specification is not implied. Exposure to Absolute Maximum Rating conditions for
extended periods may affect device reliability. Refer also to the STMicroelectronics SURE
Program and other relevant quality documents.
Table 3. Absolute maximum ratings
Symbol Parameter Value Unit
VCC Supply voltage -0.5 to 5.5 V
VIDC Input voltage -0.5 to VCC + 0.5 V
VIC DC Control input voltage -0.5 to 5.5 V
VODC Output voltage -0.5 to VCC + 0.5 V
IIKC DC Input diode current on control pin (VSEL < 0V) -50 mA
IIK DC Input diode current (VSEL < 0V) ±50 mA
IOK DC Output diode current ±20 mA
IODC Output current ±200 mA
IOP
DC Output current peak
(pulse at 1ms, 10% duty cycle) ±500 mA
ICC or IGND DC VCC or ground current ±100 mA
PDPower dissipation at TA = 70ºC (1)
1. Derate above 70ºC by 18.5mW/C
1120 mW
Tstg Storage temperature -65 to 150 °C
TLLead temperature (10 sec) 300 °C
Table 4. Recommended operating conditions
Symbol Parameter Value Unit
VCC Supply voltage (1)
1. Truth table guaranteed: 1.2V to 4.3V
1.65 to 4.3 V
VIInput voltage 0 to VCC V
VIC Control input voltage 0 to 4.3 V
VOOutput voltage 0 to VCC V
Top Operating temperature -55 to 125 °C
dt/dv Input rise and fall time
control input
VCC = 1.65V to
2.7V 0 to 20 ns/V
VCC = 3.0 to 4.3V 0 to 10
Obsolete Product(s) - Obsolete Product(s)
STG3155 Electrical characteristics
5/18
3 Electrical characteristics
3.1 DC Electrical characteristics
Table 5. DC Specifications
Symbol Parameter
Test conditions Value
Unit
Vcc (V)
TA = 25°C -40 to 85°C -55 to 125°C
Min. Typ. Max. Min. Max. Min. Max.
VIH
High Level
Input
Voltage
1.65-1.95 0.65VCC 0.65VCC 0.65VCC
V
2.3-2.5 1.2 1.2 1.2
2.7-3.0 1.3 1.3 1.3
3.3-3.6 1.4 1.4 1.4
4.3 1.6 1.6 1.6
VIL
Low Level
Input
Voltage
1.65-1.95 0.25 0.25 0.25
V
2.3-2.5 0.25 0.25 0.25
2.7-3.0 0.25 0.25 0.25
3.3-3.6 0.30 0.30 0.30
4.3 0.40 0.40 0.40
RPEAK
Switch ON
Peak
Resistance
1.8
VS = 0V to
VCC
IS = 100mA
1.1 1.5 1.5
Ω
2.7 0.7 0.8 0.9
3.0 0.7 0.8 0.9
4.3 0.6 0.7 0.8
RON
Switch On
Resistance
1.8 VS = 0.9V
IS = 100mA 1.0 1.2 1.4
Ω
2.7 VS = 1.3V
IS = 100mA 0.6 0.7 0.8
3.0 VS = 1.5V
IS = 100mA 0.6 0.7 0.8
4.3 VS = 2.5V
IS = 100mA 0.5 0.6 0.7
∆RON
ON
Resistance
Match
between
channels (1)
1.8
VS @ RON
Max
IS = 100mA
12
mΩ
2.7 17
3.0 18
4.3 21
RFLAT
ON
Resistance
FLATNESS
(2)
1.8
VS = 0V to
VCC
IS = 100mA
0.45 0.50 0.50
Ω
2.7 0.28 0.32 0.32
3.0 0.27 0.32 0.32
4.3 0.25 0.30 0.30
Obsolete Product(s) - Obsolete Product(s)
Electrical characteristics STG3155
6/18
Symbol Parameter
Test conditions Value
Unit
Vcc (V)
TA = 25°C -40 to 85°C -55 to 125°C
Min. Typ. Max. Min. Max. Min. Max.
IOFF
OFF State
Leakage
Current
(SN), (D)
4.3 VS = 0.3 or
4V ±20 ±100 nA
IIN
Input
Leakage
Current
0 – 4.3 VSEL = 0 to
4.3V ±0.1 ±1 µA
ICC
Quiescent
Supply
Current
1.65 – 4.3
VSEL =
VCC or
GND
±0.05 ±0.2 ±1 µA
ICCLV
Quiescent
Supply
Current Low
Voltage
Driving
4.3
VSEL =
1.65V ±23 ±50 ±100
µA
VSEL =
1.80V ±18 ±40 ±50
VSEL =
2.60V ±7 ±20 ±30
1. ∆RON = RON(Max) - RON(Min)
2. Flatness is defined as the difference between the maximum and minimum value of ON-resistance as measured over the
specified analog signal ranges.
Table 5. DC Specifications (continued)
Obsolete Product(s) - Obsolete Product(s)
STG3155 Electrical characteristics
7/18
3.2 AC Electrical characteristics
CL = 35pF, RL = 50Ω, tr = tf ≤ 5ns
Table 6. AC Electrical characteristics
Symbol Parameter
Test conditions Value
Unit
Vcc (V)
TA = 25°C -40 to 85°C -55 to 125°C
Min. Typ. Max. Min. Max. Min. Max.
tPLH,
tPHL
Propagation
Delay
1.65-1.95
VS = OPEN
0.45
ns
2.3-2.7 0.40
3.0-3.3 0.30
3.6-4.3 0.30
tON TURN-ON time
1.65-1.95 VS = 0.8V 120
ns
2.3-2.7
VS = 1.5V
45 55 65
3.0-3.3 52 55 65
3.6-4.3 40 55 65
tOFF TURN-OFF time
1.65-1.95 VS = 0.8 22
ns
2.3-2.7
VS = 1.5V
18 30 40
3.0-3.3 16 30 40
3.6-4.3 15 30 40
tD
Break Before
Make Time Delay
1.65-1.95
CL = 35pF
RL = 50Ω
VS = 1.5V
28
ns
2.3-2.7 10
3.0-3.3 7
3.6-4.3 4
Q Charge Injection
1.65
CL = 100pF
VGEN = 0V
RGEN = 0Ω
25
pC
2.3 34
342
4.3 53
Obsolete Product(s) - Obsolete Product(s)
Electrical characteristics STG3155
8/18
3.3 Analog switch characteristics
CL = 5pF, RL = 50Ω, TA = 25°C
3.4 Truth table
Table 7. Analog switch characteristics
Symbol Parameter
Test conditions Value
Unit
Vcc (V)
TA = 25°C -40 to 85°C -55 to 125°C
Min. Typ. Max. Min. Max. Min. Max.
OIRR Off Isolation
(1) 1.65-4.3 VS = 1VRMS
f = 100kHz -74 dB
Xtalk Crosstalk 1.6-4.3 VS = 1VRMS
f = 100kHz -72 dB
THD
To t al
Harmonic
Distortion
2.3-4.3
RL = 600Ω
VS = 2VPP
f = 20Hz to 20
kHz
0.03 %
BW -3dB
Bandwidth 1.65-4.3 RL= 50Ω70 MHz
CIN
Control Pin
Input
Capacitance
6.6
pF
CSn
Sn Port
Capacitance 3.3 f = 1MHz 42
CD
D Port
Capacitance
when Switch
is Enabled
3.3 f = 1MHz 103
1. OFF Isolation = 20Log10 (VD/VS), VD = output. VS = input to OFF switch.
Table 8. Truth table
Sel Switch S1 Switch S2
HONOFF
(1)
LOFF
(1)
1. High impedance
ON
Obsolete Product(s) - Obsolete Product(s)
STG3155 Typical application circuit
9/18
4 Typical application circuit
Figure 3. ON-Resistance Figure 4. Bandwidth
Figure 5. OFF Leakage Figure 6. Channel to channel crosstalk
Figure 7. OFF Isolation
Obsolete Product(s) - Obsolete Product(s)
Test circuit STG3155
10/18
5 Test circuit
Note: CL = 5/35pF or equivalent: (includes jig capacitance)
RL = 50Ω or equivalent
RT = ZOUT of pulse generator (typically 50Ω)
Figure 8. Test circuit
Figure 9. Break-before-make time delay
Obsolete Product(s) - Obsolete Product(s)
STG3155 Test circuit
11/18
Figure 10. Switching time and charge injection
(VGEN = 0V, RGEN = 0Ω, RL = 1MΩ, CL = 100pF)
Figure 11. Turn ON, turn OFF delay time
Obsolete Product(s) - Obsolete Product(s)
Package mechanical data STG3155
12/18
6 Package mechanical data
In order to meet environmental requirements, ST offers these devices in ECOPACK®
packages. These packages have a Lead-free second level interconnect. The category of
second level interconnect is marked on the package and on the inner box label, in
compliance with JEDEC Standard JESD97. The maximum ratings related to soldering
conditions are also marked on the inner box label. ECOPACK is an ST trademark.
ECOPACK specifications are available at: www.st.com
Obsolete Product(s) - Obsolete Product(s)
STG3155 Package mechanical data
13/18
Table 9. DFN6L (1.45mm x 1mm) Mechanical data
Dim.
mm. inch
Min. Typ. Max. Min. Typ. Max.
A 0.45 0.50 0.55 0.017 0.019 0.021
A1 0 0.02 0.05 0 0.001 0.002
A3 0.127 0.005
b 0.20 0.25 0.30 0.007 0.010 0.011
D 1.35 1.45 1.55 0.053 0.057 0.061
E 0.90 1 1.10 0.035 0.040 0.043
e 0.50 0.020
L 0.25 0.35 0.45 0.010 0.013 0.017
Figure 12. Package dimensions
Obsolete Product(s) - Obsolete Product(s)
Package mechanical data STG3155
14/18
Figure 13. Tape and Reel Information
Obsolete Product(s) - Obsolete Product(s)
STG3155 Package mechanical data
15/18
Figure 14. Tape and Reel Information
Obsolete Product(s) - Obsolete Product(s)
Package mechanical data STG3155
16/18
Figure 15. Tape and Reel Information
Obsolete Product(s) - Obsolete Product(s)
STG3155
18/18
Please Read Carefully:
Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the
right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any
time, without notice.
All ST products are sold pursuant to ST’s terms and conditions of sale.
Purchasers are solely responsible for the choice, selection and use of the ST products and services described herein, and ST assumes no
liability whatsoever relating to the choice, selection or use of the ST products and services described herein.
No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted under this document. If any part of this
document refers to any third party products or services it shall not be deemed a license grant by ST for the use of such third party products
or services, or any intellectual property contained therein or considered as a warranty covering the use in any manner whatsoever of such
third party products or services or any intellectual property contained therein.
UNLESS OTHERWISE SET FORTH IN ST’S TERMS AND CONDITIONS OF SALE ST DISCLAIMS ANY EXPRESS OR IMPLIED
WARRANTY WITH RESPECT TO THE USE AND/OR SALE OF ST PRODUCTS INCLUDING WITHOUT LIMITATION IMPLIED
WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE (AND THEIR EQUIVALENTS UNDER THE LAWS
OF ANY JURISDICTION), OR INFRINGEMENT OF ANY PATENT, COPYRIGHT OR OTHER INTELLECTUAL PROPERTY RIGHT.
UNLESS EXPRESSLY APPROVED IN WRITING BY AN AUTHORIZED ST REPRESENTATIVE, ST PRODUCTS ARE NOT
RECOMMENDED, AUTHORIZED OR WARRANTED FOR USE IN MILITARY, AIR CRAFT, SPACE, LIFE SAVING, OR LIFE SUSTAINING
APPLICATIONS, NOR IN PRODUCTS OR SYSTEMS WHERE FAILURE OR MALFUNCTION MAY RESULT IN PERSONAL INJURY,
DEATH, OR SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE. ST PRODUCTS WHICH ARE NOT SPECIFIED AS "AUTOMOTIVE
GRADE" MAY ONLY BE USED IN AUTOMOTIVE APPLICATIONS AT USER’S OWN RISK.
Resale of ST products with provisions different from the statements and/or technical features set forth in this document shall immediately void
any warranty granted by ST for the ST product or service described herein and shall not create or extend in any manner whatsoever, any
liability of ST.
ST and the ST logo are trademarks or registered trademarks of ST in various countries.
Information in this document supersedes and replaces all information previously supplied.
The ST logo is a registered trademark of STMicroelectronics. All other names are the property of their respective owners.
© 2007 STMicroelectronics - All rights reserved
STMicroelectronics group of companies
Australia - Belgium - Brazil - Canada - China - Czech Republic - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan -
Malaysia - Malta - Morocco - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States of America
www.st.com
