ST STG3856 User Manual

Low voltage 1.0 Ω max dual SP3T switch

Features

■ High speed:

–t –t

■ Ultra low power dissipation:

–I

■ Low ON resistance V

–R

■ Wide operating voltage range:

–V

■ 4.3 V tolerant and 1.8 V compatible threshold

on digital control input at V

■ Latch-up performance exceeds 300 mA

(JESD 17)

■ ESD performance (analog channel vs. GND):

HBM > 2 kV (MIL STD 883 method 3015)

= 0.3 ns (typ.) at VCC=3.0V

PD

= 0.4 ns (typ.) at VCC=2.3V

PD

=0.2µA (max.) at TA=85°C

CC

=0V:

IN

=1.0Ω (max. TA=25°C) at

ON

V

=4.3V

CC

=1.5Ω (max. TA=25°C) at

ON

V

=3.0V

CC

=1.8Ω (max. TA=25°C) at

ON

V

=2.3V

CC

(opr) = 1.65 V to 4.3 V single supply

CC

= 2.3 to 4.3 V

CC

STG3856

with break-before-make feature

QFN12L

Description

The STG3856 is a high-speed CMOS low voltage dual analog SP3T (single pole triple throw) switch or dual 3 : 1 multiplexer /demultiplexer switch fabricated in silicon gate C designed to operate from 1.65 V to 4.3 V, making this device ideal for portable applications.

The device offers very low ON resistance (< 1.0 Ω) at V

= 4.3 V. The disabling and

CC

enabling of switches are done by setting the 1IN and 2IN control pins. Additional key features are fast switching speed, 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.

2

MOS technology. It is

Table 1. Device summary

Order code Temperature range Package Packaging

STG3856QTR -40°C to +85°C QFN12L (2.2 x 1.4 mm) Tape and reel

March 2010 Doc ID 11932 Rev 3 1/15

www.st.com

15

Summary description STG3856

1 Summary description

1.1 Pin connections and description

Figure 1. Connection diagram (top through view)

IN1 VCC IN2

12

11

10

Table 2. Pin description

Pin Symbol Name and function

12, 10 1IN, 2IN Controls

1,2,3, 9,8,7 1S1, 1S2, 1S3, 2S1, 2S2, 2S3 Independent channels

4,6 D1, D2 Common channels

11 V

1.2 Truth table

1S1

1S2

1S3

1

2

3

45 6

D1 GND D2

CC

2S1

9

8

2S2

7

2S3

Positive supply voltage

5 GND Ground (0 V)

Table 3. Truth table

1IN 2IN Switch state

L L High impedance

L H D1-1S1, D2-2S1

H L D1-1S2, D2-2S2

H H D1-1S3, D2-2S3

2/15 Doc ID 11932 Rev 3

STG3856 Summary description

1.3 Internal schematic

Figure 2. Internal schematic

1.4 Input equivalent circuit

Figure 3. Input equivalent circuit

Doc ID 11932 Rev 3 3/15

Maximum ratings STG3856

2 Maximum 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.

Table 4. Absolute maximum ratings

Symbol Parameter Value Unit

V

Supply voltage -0.5 to 5.5 V

CC

DC Input voltage -0.5 to V

V

I

V

IC

V

O

I

IKC

I

IK

I

OK

I

O

I

OP

or I

I

CC

GND

P

D

T

STG

T

L

1. Derate above 70ºC by 18.5mW/C.

DC Control input voltage -0.5 to 5.5 V

DC output voltage -0.5 to VCC+0.5 V

DC input diode current on control pin (V

<0V)

IN

DC input diode current (VIN< 0 V) ± 50 mA

DC output diode current ± 20 mA

DC output current ± 150 mA

DC output current peak (pulse at 1 ms, 10% duty cycle)

DC V

or ground current ± 100 mA

CC

Power dissipation at T

Storage temperature -65 to 150 °C

Lead temperature (10 sec) 300 °C

=70ºC

A

(1)

+0.5 V

CC

-50 mA

±300 mA

mW

4/15 Doc ID 11932 Rev 3

STG3856 Electrical characteristics

3 Electrical characteristics

Table 5. Recommended operating conditions

Symbol Parameter Value Unit

V

CC

V

I

V

IC

V

O

T

OP

dt/dv

1. Truth table guaranteed: 1.2 V to 4.3 V.

Supply voltage

Input voltage 0 to VCC V

Control input voltage 0 to V

Output voltage 0 to V

Operating temperature -55 to 125 °C

Input rise and fall time control input

(1)

= 1.65 V to

V

CC

= 3.0 to

V

CC

4.3 V

2.7 V

1.4 to 4.3 V

CC

V

0 to 20

ns/V

0 to 10

3.1 DC electrical characteristics

Table 6. DC electrical characteristics

Test condition Value

Symb

V

ol

IH

IL

Parameter

High level input voltage

Low level input voltage

V

CC

1.65 -

1.95

2.3 -

2.5

2.7 -

3.0

3.3 -

4.3

1.65 -

1.95

2.3 -

2.5

2.7 -

3.0

3.3 -

4.3

(V)

Min Typ Max Min Max Min Max

0.65 V

1.4 – – 1.4 – 1.4 –

1.5 – – 1.5 – 1.5 –

= 25°C -40 to 85°C -55 to 125°C

T

A

CC

––

0.65 V

CC

0.65 V

–

CC

–

– – 0.40 – 0.40 – 0.40

– – 0.50 – 0.50 – 0.50

Unit

V

Doc ID 11932 Rev 3 5/15