FSA1257AL8X_NL - Fairchild Semiconductor

March 2008

FSA1256(A) / FSA1257(A) / FSA1258(A) Rev. 1.0.5

FSA1256(A) / FSA1257(A) / FSA1258(A) — Low-RON Low-Voltage, Dual SPST Analog Switch with Low-ICCT “A” Option

FSA1256(A) / FSA1257(A) / FSA1258(A)

Low-RON Low- Voltage, Dual SPST Analog Switch with

Low-ICCT “A” Option

Features

 FSA1256A, FSA1257A, FSA1258A feature low ICCT

when S Input is lower than VCC

 Maximum 1.1Ω On Resistance (RON) for 4.5V

supply

 0.4Ω max RON flatness for 4.5V supply

 Space saving Pb-Free MicroPak™ packaging

 Broad VCC operating range:

 FSA1256, FSA1257, FSA1258: 1.65V to 5.5V

 FSA1256A, FSA1257A, FSA1258A: 2.7V to 5.5V

 Fast turn-on and turn-off time

 FSA1258, FSA1258A feature break-before-make

enable circuitry

 Over-voltage tolerant TTL compatible control input

Applications

 Cell Phone, PDA, Digital Camera, and Notebook

 LCD Monitor, TV, and Set-Top Box

Description

The FSA1256, FSA1256A, FSA1257, FSA1257A,

FSA1258, and FSA1258A are high performance dual

Single Pole/Single Throw (SPST) analog switches. All

devices feature ultra low RON of 1.1Ω maximum at 4.5V

VCC. The FSA1256, FSA1257, and FSA1258 operate

over a wide VCC range of 1.65V to 5.5V. The FSA1256A,

FSA1257A, and FSA1258A operation range is 2.7V to

5.5V. These devices are fabricated with sub-micron

CMOS technology to achieve fast switching speeds and

are designed for break-before-make operation. The

select input is TTL level compatible. The FSA1256 and

FSA1256A feature two Normally Open (NO) switches.

The FSA1257 and FSA1257A feature two Normally

Closed (NC) switches. The FSA1258 and FSA1258A

have one NO switch and one NC switch.

IMPORTANT NOTE:

For additional performance information, please contact

analogswitch@fairchildsemi.com.

Ordering Information

Part Number Top Mark Package Description Packing Method

FSA1256L8X EB 8-Lead, MicroPak™, 1.6mm Wide 5000 Units Tape and Reel

FSA1256AL8X FN 8-Lead, MicroPak™, 1.6mm Wide 5000 Units Tape and Reel

FSA1257L8X EC 8-Lead, MicroPak™, 1.6mm Wide 5000 Units Tape and Reel

FSA1257AL8X FP 8-Lead, MicroPak™, 1.6mm Wide 5000 Units Tape and Reel

FSA1258L8X ED 8-Lead, MicroPak™, 1.6mm Wide 5000 Units Tape and Reel

FSA1258AL8X FS 8-Lead, MicroPak™, 1.6mm Wide 5000 Units Tape and Reel

All packages are lead free per JEDEC: J-STD-020B standard.

MicroPak™ is a trademark of Fairchild Semiconductor Corporation.

FSA1256(A) / FSA1257(A) / FSA1258(A) Rev. 1.0.5 2

FSA1256(A) / FSA1257(A) / FSA1258(A) — Low-RON Low-Voltage, Dual SPST Analog Switch with Low-ICCT “A” Option

Analog Symbols

Figure 1. FSA1256, FSA1256A Figure 2. FSA1257, FSA1257A

Truth Tables

Control Input (s) Function Control Input (s) Function

LOW Logic Level Disconnect LOW Logic Level A Connected to B

HIGH Logic Level A Connected to B HIGH Logic Level Disconnected

Figure 3. FSA1258, FSA1258A

Truth Table

Control Input, 1S Function Control Input 2S Function

LOW Logic Level 1A Connected to 1 B LOW Logic Level Disconnect

HIGH Logic Level Disconnect HIGH Logic Level 2A Connected to 2B

Pin Descriptions

Name Description

A, B0, B1 Data Ports

S Switch Select Pin

FSA1256(A) / FSA1257(A) / FSA1258(A) Rev. 1.0.5 3

FSA1256(A) / FSA1257(A) / FSA1258(A) — Low-RON Low-Voltage, Dual SPST Analog Switch with Low-ICCT “A” Option

Absolute Maximum Ratings

Stresses exceeding the absolute maximum ratings may damage the device. The device may not function or be

operable above the recommended operating conditions and stressing the parts to these levels is not recommended.

In addition, extended exposure to stresses above the recommended operating conditions may affect device reliability.

The absolute maximum ratings are stress ratings only.

Symbol Parameter Min. Max. Units

VCC Supply Voltage -0.5 6.0 V

VS Switch Voltage(1) -0.5 VCC +0.5 V

Vin Input Voltage(1) -0.5 6.0 V

Power Dissipation at 85°C, MicroPak™ 8L Package 180 mW

IIK Input Diode Current -50 mA

ISW Switch Current 200 mA

ISWPEAK Peak Switch Current (Pulsed at 1ms Duration, <10% Duty Cycle) 400 mA

TSTG Storage Temperature Range -65 +150 °C

TJ Maximum Junction Temperature +150 °C

TL Lead Temperature (Soldering 10 Seconds) +260 °C

FSA1256, FSA1257, FSA1258 5.5

ESD Human Body Model

(JEDEC: JESD22-A114) FSA1256A, FSA1257A, FSA1258A 4.5 kV

Note:

1. Input and output negative ratings may be exceeded if input and output diode current ratings are observed.

Recommended Operating Conditions

The Recommended Operating Conditions table defines the conditions for actual device operation. Recommended

operating conditions are specified to ensure optimal performance to the datasheet specifications. Fairchild does not

recommend exceeding them or designing to absolute maximum ratings.

Symbol Parameter Min. Max. Units

FSA1256, FSA1257, FSA1258 1.65 5.50

VCC Supply Voltage FSA1256A, FSA1257A, FSA1258A 2.7 5.5 V

VIN Control Input Voltage(2) 0 VCC V

VIN Switch Input Voltage 0 VCC V

ΘJA Thermal Resistance in Still Air, MicroPak 8L Package (modeled) 224 °C/W

TA Operating Temperature -40 +85 ºC

Note:

2. Unused inputs must be held HIGH or LOW. They must not float.

FSA1256(A) / FSA1257(A) / FSA1258(A) Rev. 1.0.5 4

FSA1256(A) / FSA1257(A) / FSA1258(A) — Low-RON Low-Voltage, Dual SPST Analog Switch with Low-ICCT “A” Option

DC Electrical Characteristics

All typical values are at 25ºC unless otherwise specified. The 1.65V to 1.95V range applies to FSA1256, FSA1257,

and FSA1258 only.

TA=+25°C TA=-40 to

+85°C

Symbol Parameter Conditions VCC (V) Min. Typ. Max. Min. Max. Unit

4.5 to 5.5 2.4

2.7 to 3.6 2.0

VIH Input Voltage High(3)

1.65 to 1.95 0.9

V

4.5 to 5.5 0.8

FSA1256A, FSA1257A,

FSA1258A Only 2.7 to 3.6 0.4

2.7 to 3.6 0.6

VIL Input Voltage Low(3)

FSA1256, FSA1257,

FSA1258 Only 1.65 to 1.95 0.4

V

IIN Control Input Leakage

(S) VIN=0 to VCC 1.95 to 5.5 -1 1 µA

INO(0FF) ,

INC(0FF) Off Leakage Current A=1V, 4.5V

1B or 2B=1V, 4.5V 5.5 -2 2 -20 20 nA

IOUT=100mA, 1B or

2B=3.5V 4.5 0.95 1.15 1.30

IOUT=100mA, 1B or

2B=1.5V 2.7 2.6 4.0 4.3

RON Switch On

Resistance(3,4)

IOUT=100mA, 1B or

2B=1.2V 1.65 8.0 9.5 10.5

Ω

∆RON

On Resistance

Matching Between

Channels(3,5)

IOUT=100mA, 1B or

2B=3.5V 4.5 0.06 0.12 0.15

Ω

IOUT=100mA, 1B or

2B=0V, 1.0V, 2.0V 4.5 0.2 0.3 0.4

IOUT=100mA, 1B or

2B=0V, 0.75V, 1.5V 2.7 1.4

RFLAT(ON) On Resistance

Flatness(3,6)

IOUT=100mA, 1B or

2B=0V, 1.0V, 1.2V 1.65 1.8

Ω

5.5 0.1 0.5 1.0

ICC Quiescent Supply

Current VIN=0V or VCC, IOUT=0V 3.6 0.1 0.5 1.0

µA

ICCT Increase in Icc per Input

One Input at 2.6V,

Others at VCC or GND

(FSA1256A, FSA1257A,

FSA1258A Only)

4.3 0.2 10.0 µA

Notes:

3. Guaranteed, but not tested for Vcc=1.65V.

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

5. ∆ RON=RON max – RON min measured at identical Vcc, temperature, and voltage.

6. Flatness is defined as the difference between the maximum and minimum value of on resistance (RON) over the

specified range of conditions.

FSA1256(A) / FSA1257(A) / FSA1258(A) Rev. 1.0.5 5

FSA1256(A) / FSA1257(A) / FSA1258(A) — Low-RON Low-Voltage, Dual SPST Analog Switch with Low-ICCT “A” Option

AC Electrical Characteristics

All typical values are at 25ºC unless otherwise specified. The 1.65V to 1.95V range applies to FSA1256, FSA1257,

and FSA1258 only.

TA=+25ºC TA=-40 to

+85°C

Symbol Parameter Conditions VCC (V) Min. Typ. Max. Min. Max. Unit Figure

1B or 2B=3.0V,

RL=50Ω, CL=35pF 4.5 to 5.5 10 35 40

1B or 2B=1.5V,

RL=50Ω, CL=35pF 2.7 to 3.6 15 50 60

tON Turn-On Time(7)

1B or 2B=1.0V

RL=50Ω, CL=35pF

1.65 to

1.95 35 110 120

ns 8

1B or 2B=3.0V,

RL=50Ω, CL=35pF 4.5 to 5.5 4 15 20

1B or 2B=1.5V,

RL=50Ω, CL=35pF 2.7 to 3.6 8 20 30

tOFF Turn-Off Time(7)

1B or 2B=1.0V

RL=50Ω, CL=35pF

1.65 to

1.95 10 30 40

ns 8

1B or 2B=3.0V,

RL=50Ω, CL=35pF 4.5 to 5.5 7

tBBM Break-Before-

Make Time(7) 1B or 2B=1.5V,

RL=50Ω, CL=35pF 2.7 to 3.6 12

ns 9

4.5 to 5.5 20

2.7 to 3.6 10

Q Charge

Injection(7)

CL=1.0nF,

VGEN=0V, RGEN=0Ω1.65 to

1.95 5

pC 13

OIRR Off Isolation(7) f=1MHz, RL=50Ω, 1.65 to

5.5 -70 dB 11

Xtalk Crosstalk(7) f=1MHz, RL=50Ω, 1.65 to

4.3 -100 dB 12

BW -3db

Bandwidth(7) RL=50Ω 1.65 to

4.3 300 MHz 10

THD Total Harmonic

Distortion(7)

f=20Hz to 20kHz,

RL=600Ω,

VIN=0.5VPP

1.65 to

4.3 0.002 % 16

Note:

7. Guaranteed, but not tested for Vcc=1.65V.

Capacitance

TA=+25ºC

Symbol Parameter Conditions VCC (V) Min. Typ. Max.

Unit Figure

CIN Control Pin Input Capacitance f=1MHz 0 3.0 pF 15

COFF B Port Off Capacitance f=1MHz 4.5 11.5 pF 14

CON A Port On Capacitance f=1MHz 4.5 27.0 pF 15

FSA1256(A) / FSA1257(A) / FSA1258(A) Rev. 1.0.5 6

FSA1256(A) / FSA1257(A) / FSA1258(A) — Low-RON Low-Voltage, Dual SPST Analog Switch with Low-ICCT “A” Option

Test Diagrams

Select

B0,B1

A

V

S

= 0 or V

CC

ION

VON

R

ON =V

ON /I

ON

GND

V

SW

GND

V

Select

= 0 or V

cc

NC

A

I

A(OFF)

V

IN

GND

I

V

IN

V

IN

V

S

Figure 4. On Resistance Figure 5. Off Leakage (Ports Tested Separately)

Selec

t

V

S

=0 orV

cc

NC I

A(ON)

V

IN

GND

A

V

IN

V

R

L

C

L

nB

n

nA

GND

R

S

V

Sel

V

IN

GND

V

OUT

Figure 6. On Leakage Figure 7. Test Circuit Load

t

RISE

=2.5ns

GND

V

CC

90% 90%

10%10%

t

FALL

=2.5ns

V

CC

/2 V

CC

/2

Input - V

Sel

Output- V

OUT

90%

V

OH

V

OL

t

ON

t

OFF

90%

t

FALL

-

Figure 8. Turn-On / Turn-Off Waveforms

FSA1256(A) / FSA1257(A) / FSA1258(A) Rev. 1.0.5 7

FSA1256(A) / FSA1257(A) / FSA1258(A) — Low-RON Low-Voltage, Dual SPST Analog Switch with Low-ICCT “A” Option

Test Diagrams (Continued)

t

RISE

=2.5ns

V

OUT

V

CC

0.9

V

OUT

V

CC

/2

t

BBM

0V

V

Input-V

Sel

0.9 • V

OUT

90%

10%

C

L

R

L

GND

V

SW

GND V

IN

GND

R

L

and C

L

are functions of the application

environment (50Ω, 75Ω, or 100Ω).

includes test fixture and stray capacitance.

OUT

C

L

•

B0

n

B1

nA

R

S

V

Sel

GND

Figure 9. Break-Before-Make Interval Timing

V

OUT

GND

R

T

GND

V

S

R

S

Network Analyzer

V

S

GND

RS and RT are functions of the application

environment (50, 75, or 100 ).

V

IN

Figure 10. Bandwidth

V

OUT

GND

R

T

GND

V

S

R

S

Network Analyzer

R

T

GND

V

Sel

GND

Off Isolation= 20 Log (VOUT /V

IN)

T

RS and RT are functions of the application

environment (50, 75, or 100 ).

Figure 11. Channel Off Isolation

FSA1256(A) / FSA1257(A) / FSA1258(A) Rev. 1.0.5 8

FSA1256(A) / FSA1257(A) / FSA1258(A) — Low-RON Low-Voltage, Dual SPST Analog Switch with Low-ICCT “A” Option

Test Diagrams (Continued)

R

S

and R

T

are functions of the application

environment (50, 75, or 100 ).

V

OUT

GND

R

T

GND

V

S

R

S

Network Analyzer

R

T

GND

V

Sel

GND

Crosstalk = 20 Log (V

OUT

/ V

IN

)

V

IN

Figure 12. Adjacent Channel Crosstalk

RS

VOUT

Q = ΔVOUT • CL

ΔVOUT

VOUT

VCC

0V

Input – VSEL

Generator

GND

VS

CL

V

SEL

VIN

B

nSn

GND CL includes test fixture and stray capacitance

GND

Off On Off

mA

Figure 13. Charge Injection Test

B0

n

B1

Capacitance

Meter

Select

B0,B1

f=1MHz

V

S

= 0 or V

CC

nB

n

Capacitance

Meter

Select

f=1MHz V

S

= 0 or V

CC

nB

n

Figure 14. Channel Off Capacitance Figure 15. Channel On Capacitance

V

OUT

GND

GND R

T

GND

V

S

R

S

Audio Analyzer

V

CNTRL

GND

V

IN

V

CNTRL

=0orVcc

R

S

and R

T

are functions of the

application environment.

Figure 16. Total Harmonic Distortion

FSA1256(A) / FSA1257(A) / FSA1258(A) Rev. 1.0.5 9

FSA1256(A) / FSA1257(A) / FSA1258(A) — Low-RON Low-Voltage, Dual SPST Analog Switch with Low-ICCT “A” Option

Physical Dimensions

(0.09)

(0.1)

(0.2)

1.6

2X

0.05

0.00

1.6

2X

C0.05 C

4

3. DRAWING CONFORMS TO ASME Y.14M-1994

2. DIMENSIONS ARE IN MILLIMETERS

1. PACKAGE CONFORMS TO JEDEC MO-255 VARIATION UAAD

BOTTOM VIEW

4. PIN 1 FLAG, END OF PACKAGE OFFSET

MAC08AREV4

123

567

8

Notes:

8X 0.25

0.35

3X

8X

1.0

4

0.5

8X

0.25

0.15

0.10 CAB

0.05 C

0.10 C

TOP VIEW

INDEX AREA

B

Recommended Landpattern

A

0.10 C

0.55 MAX

0.05 C

DETAIL A

0.35

0.25

(0.15)

(0.20)

0.35

0.25

DETAIL A

PIN #1 TERMINAL

SCALE: 2X

5. DRAWING FILE NAME: MKT-MAC08AREV4

Figure 17. 8-Lead MicroPak™, 1.6mm Wide

For tape and reel specifications f or MicroPak, please visit:

http://www.fairchildsemi.com/products/logic/pdf/micropak_tr.pdf

Package drawings are provided as a service to customers consideri ng Fairchild components. Drawings may change in any manner

without notic e. Please note the revision and/or date on the drawing and contact a Fairchild Semiconductor representativ e to verify or

obtain the most recent revisi on. Package specific ati ons do not ex pand the terms of Fairchild’s worl dwide terms and condi tions,

specifically the warranty therein, which covers Fairchild products.

Always visit Fairchi l d Semiconductor’s online packaging area for the most recent package drawings:

http://www.fairchildsemi.com/packaging/

FSA1256(A) / FSA1257(A) / FSA1258(A) Rev. 1.0.5 10

FSA1256(A) / FSA1257(A) / FSA1258(A) — Low-RON Low-Voltage, Dual SPST Analog Switch with Low-ICCT “A” Option