ST STG3157 User Manual

Low voltage low on-resistance SPDT switch

Features

■ High speed:

–t

= 0.3 ns (max) at VCC = 4.5 V

PD

–t

= 0.8 ns (max) at VCC = 3.0 V

PD

–t

= 1.2 ns (max) at VCC = 2.3 V

PD

■ Ultra low power dissipation:

–I

= 1 µA (max) at TA = 85 °C

CC

■ Low on-resistance; at V

–R –R

■ Wide operating voltage range:

–V

■ TTL threshold ON control input at

V

■ Pin and function compatible with 74 series

= 7 Ω (max TA = 85 °C) at VCC = 4.5 V

ON

= 9 Ω (max TA = 85 °C) at VCC = 3.0 V

ON

(OPR) = 1.65 V to 5.5 V single supply

CC

= 2.7 to 3.6 V

CC

3157

■ Latch-up performance exceeds

150 mA (JESD 17)

Description

= 0 V:

IN

STG3157

with break-before-make feature

SOT323-6L

(connected to common port D) when the IN input is held high, and OFF (a high impedance state exists between the two ports) when IN is held low. Switch S2 is ON (connected to common port D) when the IN input is held low and OFF (a high impedance state exists between the two ports) when IN is held high.

Additional key features are fast switching speed, break-before-make delay time, and very low power consumption. All inputs and outputs are equipped with protection circuits to protect against static discharge, giving them immunity from ESD and transient excess voltage.

The STG3157 is a high-speed CMOS analog SPDT (single-pole double-throw) switch or 2:1 multiplexer/demultiplexer bus switch manufactured using silicon gate C

2

MOS

technology. It is designed to operate from a

1.65 V to 5.5 V supply, making the device ideal for portable applications.

The STG3157 features very low on-resistance (< 9 Ω) at V

= 3.0 V. The IN input is provided to

CC

control the SPDT switch, and is compatible with standard CMOS output. Switch S1 is ON

Table 1. Device summary

April 2010 Doc ID 9007 Rev 2 1/18

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18

Contents STG3157

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

4 Test circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

5 Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

6 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

2/18 Doc ID 9007 Rev 2

STG3157 Pin connections and functions

1 Pin connections and functions

Figure 1. Pin connections and IEC logic symbols

Table 2. Truth table

IN Switch S1 Switch S2

HONOFF

LOFF

(1)

ON

1. High impedance

Table 3. Pin descriptions

Pin Nº Symbol Name and function

1, 3 S1, S2 Independent channels

4 D Common channels

6INControl

5V

CC

2 GND Ground (0 V)

Figure 2. Input equivalent circuit

Positive supply voltage

Doc ID 9007 Rev 2 3/18

Electrical ratings STG3157

2 Electrical ratings

Stressing the device above the ratings 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 4. Absolute maximum ratings

Symbol Parameter Value Unit

V

CC

V

IC

V

O

I

IKC

I

IK

I

OK

I

O

I

or I

CC

T

stg

T

L

Supply voltage -0.5 to +7.0 V

DC input voltage -0.5 to VCC + 0.5 V

I

DC control input voltage -0.5 to VCC + 0.5 V

DC output voltage -0.5 to VCC + 0.5 V

DC input diode current on control pin (V

DC input diode current (V

< 0V) ±50 mA

IN

< 0V) ±50 mA

IN

DC output diode current ±20 mA

DC output current +128 mA

DC VCC or ground current ±100 mA

GND

Storage temperature -65 to 150 °C

Lead temperature (10 s) 300 °C

Table 5. Recommended operating conditions

Symbol Parameter Value Unit

V

CC

V

IC

V

O

T

op

dt/dv

1. Truth table guaranteed: 1.2 V to 6.0 V

Supply voltage

Input voltage 0 to V

I

Control input voltage 0 to 5.5 V

Output voltage 0 to V

Operating temperature -55 to 125 °C

Input rise and fall time control input

(1)

= 1.65V to 2.7V 0 to 20

V

CC

= 3.0 to 4.5V 0 to 10

V

CC

1.65 to 4.5 V

CC

V

ns/V

4/18 Doc ID 9007 Rev 2

STG3157 Electrical characteristics

3 Electrical characteristics

3.1 DC Electrical characteristics

Table 6. DC specifications

Test conditions Value

Symbol Parameter

V

IH

V

IL

R

ON

ΔR

ON

High level input voltage

Low level input voltage

Switch onresistance

Onresistance match between channels

TA = 25°C -40 to 85°C -55 to 125°C

Vcc (V)

Min. Typ. Max. Min. Max. Min. Max.

1.65-1.95 0.75V

CC

0.75V

0.7V

CC

0.75V

0.7V

CC

2.7-3.6 2 2 2

1.65-1.95 0.25V

CC

0.25V

0.3V

CC

0.25V

0.3V

2.7-3.6 0.8 0.8 0.8

V

= 0V

4.5

3.0

S

= 30mA

I

S

= 2.4V

V

S

IS = 30mA

V

= 4.5V

S

IS = 30mA

= 0V

V

S

= 100mA

I

S

= 3V

V

S

IS = 24mA

V

= 0V

S

IS = 8mA

4.4 7 7 9

4.9 12 12 14.5

6.1 15 15 18

5.2 9 9 11

7.8 20 20 24

6.5 12 12 14.5

2.3 = 2.3V

V

1.65

4.5

3.0

2.3

1.65

S

= 8mA

I

S

= 0V

V

S

= 4mA

I

S

V

= 1.65V

S

IS = 4mA

= 3.15V

V

S

= 30mA

I

S

= 2.1V

V

S

IS = 24mA

V

= 1.6V

S

IS = 8mA

= 1.15V

V

S

= 4mA

I

S

9.6 30 30 36

9.0 20 20 24

14 50 50 60

0.10

0.20

0.35

CC

Unit

V2.3-2.5 0.7V

CC

V2.3-2.5 0.3V

Ω

Doc ID 9007 Rev 2 5/18

Electrical characteristics STG3157

Table 6. DC specifications (continued)

Test conditions Value

Symbol Parameter

On-

R

FLAT

resistance flatness

OFF state

OFF

leakage

I

current

Input

I

leakage

IN

current

Quiescent

I

supply

CC

current

Vcc (V)

5.0

3.3

2.5

1.8

1.65-195

0 - 5.5

1.65 - 4.3

= 0V to

V

S

V

CC

IS = 30mA

= 0V to

V

S

V

CC

IS = 24mA

= 0V to

V

S

V

CC

IS = 8mA

= 0V to

V

S

V

CC

IS = 4mA

V

= 0 to

S

V

CC

V

= 0 to

IN

5.5V

V

= VCC

IN

or GND

TA = 25°C -40 to 85°C -55 to 125°C

Min. Typ. Max. Min. Max. Min. Max.

3

6

14

80

±0.05

±0.1 ±1 ±10 μA

1110μA

Unit

Ω

6/18 Doc ID 9007 Rev 2