Fairchild NC7SB3157 service manual

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NC7SB3157, FSA3157 Low Voltage SPDT Analog Switch or 2:1 Multiplexer/Demultiplexer Bus Switch

March 2006

NC7SB3157, FSA3157
Low Voltage SPDT Analog Switch or
2:1 Multiplexer/Demultiplexer Bus Switch

General Description

The NC7SB3157 or FSA3157 is a high performance, sin­gle-pole/double-throw (SPDT) Analog Switch or 2:1 Mul­tiplexer/Demultiplexer Bus Switch. The device is
fabricated with advanced sub-micron CMOS technology
to achieve high speed enable and disable times and low
On Resistance. The break before make select circuitry
prevents disruption of signals on the B Port due to both
switches temporarily being enabled during select pin
switching. The device is specified to operate over the

1.65 to 5.5V V
ates voltages up to 5.5V independent of the V
ing range.

operating range. The control input toler-

CC

operat-

CC

Features

Useful in both analog and digital applications

■

■

Space saving SC70 6-lead surface mount package
Ultra small MicroPak™ Pb-Free leadless package

■

■

Low On Resistance; < 10 Ω on typ @ 3.3V V
Broad V

■

■

Rail-to-Rail signal handling
Power down high impedance control input

■

■

Overvoltage tolerance of control input to 7.0V
Break before make enable circuitry

■

■

250 MHz, 3dB bandwidth

operating range; 1.65V to 5.5V

CC

CC

Ordering Information

Product

Package

Order Number

NC7SB3157P6X MAA06A B7A 6-Lead SC70, EIAJ SC88, 1.25mm Wide 3k Units on Tape and Reel
NC7SB3157P6X_NL

NC7SB3157L6X MAC06A BB Pb-Free 6-Lead MicroPak, 1.0mm Wide 5k Units on Tape and Reel
FSA3157P6X MAA06A B7A 6-Lead SC70, EIAJ SC88, 1.25mm Wide 3k Units on Tape and Reel
FSA3157P6X_NL

FSA3157L6X MAC06A BB Pb-Free 6-Lead MicroPak, 1.0mm Wide 5k Units on Tape and Reel

Pb-Free package per JEDEC J-STD-020B.

Number

1

MAA06A B7A Pb-Free 6-Lead SC70, EIAJ SC88,

1

MAA06A B7A Pb-Free 6-Lead SC70, EIAJ SC88,

Code

Top Mark Package Description Supplied As

3k Units on Tape and Reel

1.25mm Wide

3k Units on Tape and Reel

1.25mm Wide

Note:

1. “_NL” indicates Pb-Free package (per JEDEC J-STD-020B). Device available in Tape and Reel only.

MicroPak™ is a trademark of Fairchild Semiconductor Corporation.

©2006 Fairchild Semiconductor Corporation

NC7SB3157, FSA3157 Rev. 1.0.1

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k

NC7SB3157, FSA3157 Low Voltage SPDT Analog Switch or 2:1 Multiplexer/Demultiplexer Bus Switch

Logic Symbol

B

1

S

B

0

Analog Symbol

B

1

GND

B

0

Function T able

Input (S) Function

LB

HB

H = HIGH Logic Level
L = LOW Logic Level

Connected to A

0

Connected to A

1

Connection Diagrams

Pin Assignments for SC70

1

B

1

A

2

GND

3

B

0

1

0

(Top View)

Pin One Orientation Diagram

S

V

CC

A

Pin One

AAA

(Top View)

AAA = Product Code Top Mark , see Ordering
Information.

Note:

Orientation of Top Mark determines Pin One location.
Read the top product code mark left to right, Pin One is
the lower left pin (see diagram).

Pad Assignments for MicroPa

6

S

5

V

CC

4

A

Pin Descriptions

Pin Names Description

A, B

, B

0

1

S Control Input

Data Ports

1

B

1

2

GND

34

B

0

S

6

5

V

CC

A

(T op Through View)

NC7SB3157, FSA3157 Rev. 1.0.1

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NC7SB3157, FSA3157 Low Voltage SPDT Analog Switch or 2:1 Multiplexer/Demultiplexer Bus Switch

Absolute Maximum Ratings

The “Absolute Maximum Ratings” are those values beyond which the safety of the device cannot be guaranteed.
The device should not be operated at these limits. The parametric values defined in the Electrical Characteristics
tables are not guaranteed at the absolute maximum ratings. The “Recommended Operating Conditions” table will
define the conditions for actual device operation.)

Symbol Parameter Rating

V

V

V

I

IK

I

OUT

I

CC

T

T

T

P

CC
S
IN

STG
J
L
D

/I

GND

Supply Voltage () –0.5V to +7.0V
DC Switch Voltage
DC Input Voltage
DC Input Diode Current @ (I

2

2

) V

< 0V –50 mA

IK

IN

–0.5V to V

–0.5V to +7.0V

CC

+0.5V

DC Output Current 128 mA
DC V

or Ground Current ±100 mA

CC

Storage Temperature Range –65°C to +150°C
Junction Temperature under Bias 150°C
Junction Lead Temperature (Soldering, 10 seconds) 260°C
Power Dissipation @ +85°C 180 mW
ESD, Human Body Model 4000V

Recommended Operating Conditions

3

Symbol Parameter Rating

V

CC

V

IN

V

IN

V

OUT

T

A

t

, t

r

f

θ

JA

Notes:

2. The input and output negative voltage ratings may be exceeded if the input and output diode current ratings are

observed.

3. Control input must be held HIGH or LOW, it must not float.

Supply Voltage Operating 1.65V to 5.5V
Control Input Voltage 0V to V
Switch Input Voltage 0V to V
Output V oltage 0V to V

CC
CC
CC

Operating Temperature –40°C to +85°C
Input Rise and Fall Time

Control Input V
Control Input V

= 2.3V–3.6V 0 ns/V to 10 ns/V

CC

= 4.5V–5.5V 0 ns/V to 5 ns/V

CC

Thermal Resistance 350°C/W

NC7SB3157, FSA3157 Rev. 1.0.1

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≤

Ω

Ω

Ω

DC Electrical Characteristics

T

= +25°C T

A

Symbol Parameter Conditions V

V

IH

HIGH Level 1.65 – 1.95 0.75 V
Input Voltage 2.3 – 5.5 0.7 V

V

IL

LOW Level 1.65 – 1.95 0.25 V

CC

(V)

CC

CC

Input Voltage 2.3 – 5.5 0.3 V

I

IN

I

OFF

R

ON

I

CC

R

RANGE

∆R

R

flat

Input Leakage
Current

OFF State Leakage
Current

Switch On
Resistance

Quiescent Supply
Current All Channels
ON or OFF

Analog Signal
Range

On Resistance
Over Signal
Range

On Resistance

ON

Match Between
Channels

On Resistance
Flatness

4, 8

4

4, 5, 6

4, 5, 7

0 ≤ V

5.5V 0 – 5.5 ±0.05 ±0.1 ±1 µA

IN

0 ≤ A, B ≤ V

V

IN

V

IN

V

IN

V

IN

V

IN

V

IN

V

IN

V

IN

V

IN

CC

= 0V, I

= 30 mA 4.5 3.0 7.0 7.0

O

= 2.4V, I
= 4.5V, I
= 0V, I
= 3V, I
= 0V, I
= 2.3V, I
= 0V, I
= 1.65V, I

= –30 mA 5.0 12.0 12.0

O

= –30 mA 7.0 15.0 15.0

O

= 24 mA 3.0 4.0 9.0 9.0

O

= –24 mA 10.0 20.0 20.0

O

= 8 mA 2.3 5.0 12.0 12.0

O

= –8 mA 13.0 30.0 30.0

O

= 4 mA 1.65 6.5 20.0 20.0

O

= –4 mA 17.0 50.0 50.0

O

VIN = VCC or GND

= 0

I

OUT

IA = –30 mA, 0 ≤ VBn ≤ V
I

= –24 mA, 0 ≤ VBn ≤ V

A

I

= –8 mA, 0 ≤ VBn ≤ V

A

I

= –4 mA, 0 ≤ VBn ≤ V

A

1.65 – 5.5 ±0.05 ±0.1 ±1 µA

5.5 1 10 µA

CC
CC

CC
CC

V

CC

4.5 25.0 Ω

3.0 50.0

2.3 100

1.65 300

0VCC0VCCV

IA = –30 mA, VBn = 3.15 4.5 0.15 Ω
I

= –24 mA, VBn 2.1 3.0 0.2

A

I

= –8 mA, VBn = 1.6 2.3 0.5

A

I

= –4 mA, VBn = 1.15 1.65 0.5

A

IA = –30 mA, 0 ≤ V
I

= –24 mA, 0 ≤ V

A

I

= –8 mA, 0 ≤ V

A

I

= –4 mA, 0 ≤ V

A

Bn
Bn

Bn
Bn

≤ V
≤ V

≤ V
≤ V

CC
CC

CC
CC

5.0 6.0 Ω

3.3 12.0

2.5 28.0

1.8 125

Notes:

4. Measured by the voltage drop between A and B pins at the indicated current through the switch. On Resistance is

determined by the lower of the voltages on the two (A or B Ports).

5. Parameter is characterized but not tested in production.

6. ∆ R

ON

= R

max – R

ON

min measured at identical V

ON

, temperature and voltage levels.

CC

7. Flatness is defined as the difference between the maximum and minimum v alue of On Resistance ov er the specified

range of conditions.

8. Guaranteed by Design.

= –40°C to +85°C

A

0.75 V

0.7 V

CC

CC

CC

CC

0.25 V

0.3 V

CC

CC

UnitsMin Typ Max Min Max

V

V

Ω

Ω

Ω

Ω

Ω

Ω

NC7SB3157, FSA3157 Low Voltage SPDT Analog Switch or 2:1 Multiplexer/Demultiplexer Bus Switch

NC7SB3157, FSA3157 Rev. 1.0.1

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AC Electrical Characteristics

NC7SB3157, FSA3157 Low Voltage SPDT Analog Switch or 2:1 Multiplexer/Demultiplexer Bus Switch

Symbol Parameter Conditions

t

,

PHL

t

PLH

t

PZL

t

PZH

t

PLZ

t

PHZ

t

B-M

Q Charge Injection

OIRR Off Isolation
Xtalk Crosstalk R
BW –3dB Bandwidth R
THD Total Harmonic

Propagation Delay
Bus to Bus

,

Output Enable Time
Turn on Time

)

(A to B

n

,

Output Disable Time
Turn Off Time
(A Port to B Port)

Break Before Make Time

Distortion

9

10

9

11

VI = OPEN 1.65 – 1.95 3.5 3.5 ns Figure 7

V

= 2 x VCC for t

I

VI = 0V for t

VI = 2 x V
VI = 0V for t

9

CL = 0.1 nF, V
R

= 0Ω 3.3 3.0

GEN

RL = 50Ω, f = 10MHz 1.65 – 5.5 –57.0 dB Figure 11

= 50Ω, f = 10MHz 1.65 – 5.5 –54.0 dB Figure 12

L

= 50Ω 1.65 – 5.5 250 MHz Figure 15

L

RL = 600Ω, 0.5 V
f = 600 Hz to 20 KHz

CC

PZH

for t

PHZ

PZL

PLZ

GEN

V

CC

(V)

2.3 – 2.7 1.2 1.2

3.0 – 3.6 0.8 0.8

4.5 – 5.5 0.3 0.3

1.65 – 1.95 7.0 23.0 7.0 24.0 ns Figure 7

2.3 – 2.7 3.5 13.0 3.5 14.0

3.0 – 3.6 2.5 6.9 2.5 7.6

4.5 – 5.5 1.7 5.2 1.7 5.7

1.65 – 1.95 3.0 12.5 3.0 13.0 ns Figure 7

2.3 – 2.7 2.0 7.0 2.0 7.5

3.0 – 3.6 1.5 5.0 1.5 5.3

4.5 – 5.5 0.8 3.5 0.8 3.8

1.65 – 1.95 0.5 0.5 ns Figure 9

2.3 – 2.7 0.5 0.5

3.0 – 3.6 0.5 0.5

4.5 – 5.5 0.5 0.5

= 0V, 5.0 7.0 pC Figure 10

P-P

,

5.0 .011 %

TA = +25°C TA = –40°C to +85°C

Units

Figure

NumberMin Typ Max Min Max

Figure 8

Figure 8

Figure 8

Capacitance

12

Figure

Symbol Parameter Typ Max Units Conditions

C

IN

C

IO-B

C

IOA-ON

Control Pin Input Capacitance 2.3 pF VCC = 0V
B Port Off Capacitance 6.5 pF VCC = 5.0V Figure 13
A Port Capacitance When Switch Is Enabled 18.5 pF VCC = 5.0V Figure 14

Number

Notes:

9. Guaranteed by Design.

10.This parameter is guaranteed by design but not tested. The bus switch contributes no propagation delay other than the

RC delay of the On Resistance of the switch and the 50 pF load capacitance, when driven by an ideal voltage source
(zero output impedance).

11.Off Isolation = 20 log

12.T

= +25°C, f = 1 MHz, Capacitance is characterized but not tested in production.

A

[VA / VBn]

10

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