FSA1258L8X-NL - Fairchild Semiconductor

March 2004

Revised April 2005

FSA1256 • FSA1256A • FSA1257 • FSA1257A • FSA1258 • FSA1258A Low RON Low Voltage Dual SPST Analog

Switch with Low ICCT “A” Option

FSA1256 • FSA1256A • FSA1257 • FSA1257A •

FSA1258 • FSA1258A

Low RON Low Voltage Dual SPST Analog Switch

with Low ICCT “A” Option

General Descript ion

The FSA1256, FSA1256A, FSA1257, FSA1257A,

FSA1258, and FSA1258A are high performance dual Sin-

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

feature ultra low RON of 1.1

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-bef ore -m ake op era ti on . T he se lect in pu t is TT L l evel

compatible. The FSA1256 and FSA1256A feature two Nor-

mally 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.

Features

■FSA1256A, FSA1257A, FSA1258A feature low ICCT

when S Input is lower than VCC

■Maximum 1.1

On Resistance (RON) for 4.5V supply

■0.4

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-vol tage toler ant TTL com patibl e cont rol in pu t

Ordering Code:

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

MicroPak

is a tradem ark of F airchild Sem iconduc t or Corporation.

Product Packag e Desc ri ption Supplied AsOrder Package Code

Number Number Top Mark

FSA1256L8X MAC08A EB Pb-Free 8-Lead MicroPak, 1.6 mm Wide 5K Units on Tape and Reel

FSA1256AL8X MAC08A FN Pb-Free 8-Lead MicroPak, 1.6 mm Wide 5K Units on Tape and Reel

FSA1257L8X MAC08A EC Pb-Free 8-Lead MicroPak, 1.6 mm Wide 5K Units on Tape and Reel

FSA1257AL8X MAC08A FP Pb-Free 8-Lead MicroPak, 1.6 mm Wide 5K Units on Tape and Reel

FSA1258L8X MAC08A ED Pb-Free 8-Lead MicroPak, 1.6 mm Wide 5K Units on Tape and Reel

FSA1258AL8X MAC08A FS Pb-Free 8-Lead MicroPak, 1.6 mm Wide 5K Units on Tape and Reel

www.fairchildsemi.com 2

FSA1256 • FSA1256A • FSA1257 • FSA1257A • FSA1258 • FSA1258A

Analog Symbols

FSA1256, FSA1256A

(Top Through View)

FSA1257, FSA1257A

(Top Through View)

Truth Tables

HIGH Lo gic Level L

LOW Lo gic Level

Analog Symbol

FSA12 58, FS A 1 258 A

(Top Through View)

Truth Table

HIGH Logi c Level L

LOW Lo gic Level

Pin Descriptions

FSA1256, FSA1256A

Control Input(s) Function

L Disconnect

H A Connected to B

FSA1257, FSA1257A

Control Input(s) Func tion

L A Co nnected to B

H Disconnect

FSA12 58, FS A 1 258 A

Control Input 1S Function Control Input 2S Function

L 1A Connected to 1B L Disconnect

H Disconnect H 2A Connected to 2B

Pin Names Function

A, B Data Ports

S Control Input

3 www.fairchildsemi.com

FSA1256 • FSA1256A • FSA1257 • FSA1257A • FSA1258 • FSA1258A

Absolute Maximum Ratings(Note 1) Recommended Operating

Conditions

Note 1: The “Absolute Maximum Ratings” are those val ues beyond w hich

the saf ety of the device cannot be guarante ed. The device should not be

operated at these limits. The parametric values defined in the Electrical

Char ac teri s tics t ables are not guaran t eed at t he abso lute maximum ratings .

The “R ecomm ended O peratin g Con ditions ” table will defin e the condition s

for actu al device operation.

Note 2: The input and output negative voltage ratings may be exceeded if

the in put and ou t put diode curre nt ratings are obser v e d.

Note 3: Unused inputs must be held HIGH or LOW. They may not float.

DC Electrical Characteristics (All typical values are @ 25

C unless otherwise specified)

Note 4: On Resistance is dete rm ined by the v olta ge drop be tween A and B pins at th e indicate d c urrent through the switch .

Note 5:

RON

RONmax



RONmin measured at identical VCC, temperat ure, and vo lta ge.

Note 6: Flatness is defined as the difference between the maximum and minimum value of On Resistance over the specified range of conditions.

Supply Voltage (VCC)



0.5V to



6.0V

Switch Voltage (VS) (Note 2)



0.5V to VCC



0.5V

Input Voltage (VIN) (Not e 2)



0.5V to



6.0V

Input Diode Current



50 mA

Switch Current 200 mA

Peak Switch Current (Pulsed at

1 ms duration,



10% Duty Cycle) 400 mA

Power Dissipation @ 85

MicroPak 8L package 180 mW

Storage Temperature Range (TSTG)



C to



150

Maximum Junction Temperature (TJ)



150

Lead Temperature (TL)

Soldering, 10 seconds



260

ESD

Human Body Model

FSA1256, FSA1257, FSA1258 5.5kV

FSA1256A, FSA1257A, FSA1258A 4.5kV

Supply Voltage (VCC)

FSA1256, FSA1257, FSA1258 1.65V to 5.5V

FSA1256A, FSA1257A, FSA1258A 2.7V to 5.5V

Control Input Voltage (VIN) (Note 3) 0V to VCC

Switch Input Voltage (VIN)0V to V

Operating Temperature (TA)



C to



Thermal Resistance (

JA) in still air

MicroPak 8L package 224

C/W

(modeled)

Symbol Parameter VCC TA





C to



CUnits Conditions

(V) Min Typ Max Min Max

VIH Input Voltage High 2.7 to 3.6 2.0 V

4.5 to 5.5 2.4

VIL Input Voltage Low 2.7 to 3.6 0.4 VFSA1256A, FSA1257A, FSA1258A Only

2.7 to 3.6 0.6

4.5 to 5.5 0.8

IIN Control Input Leakage 2.7 to 3.6



1.0 1.0

0V to VCC

4.5 to 5.5



1.0 1.0

INO(OFF), OFF-Leakage Current 5.5 -2.0 2.0



20.0 20.0 nA A

1V, 4.5V

INC(OFF) 1B or 2B

1V, 4.5V

RON Switch On Resistance 2.7 2.6 4.0 4.3

IOUT

100 mA, 1B or 2B

1.5V

(Note 4) 4.5 0.95 1.15 1.3 IOUT

100 mA, 1B or 2B

3.5V

RON On Resistance Matching

Between Channels 4.5 0.06 0.12 0.15 IOUT

100 mA, 1B or 2B

3.5V

(Note 5)

RFLAT(ON) On Resistance Flatness 2.7 1.4

IOUT

100 mA, 1 B or 2B

0V, 0.75V, 1.5V

(Note 6) 4.5 0.2 0.3 0.4 IOUT

100 mA, 1B or 2B

0V, 1V, 2V

ICC Quiescent Supply Current 3.6 0.1 0.5 1.0

0V or VCC, IOUT

5.5 0.1 0.5 1.0

ICCT Increase in ICC per Input 4.3 0.2 10.0

A One Input at 2.6V, Others at VCC or GND

(FSA1256 A, FSA1 257A, FSA125 8A Only)

www.fairchildsemi.com 4

FSA1256 • FSA1256A • FSA1257 • FSA1257A • FSA1258 • FSA1258A

AC Electrical Characteristics (All typical value are @ 25

C unless otherwise specified)

Capacitance

Symbol Parameter VCC TA





C to



CUnits Conditions Figure

(V) Min Typ Max Min Max Number

tON Turn ON Time 2.7 to 3.6 15.0 50.0 60.0 ns 1B or 2B

1.5V, RL

, CL

35 pF Figure 1

4.5 to 5.5 10.0 35.0 40.0 1B or 2B

3.0V, RL

, CL

35 pF

tOFF Turn OFF Time 2.7 to 3.6 8.0 20.0 30.0 ns 1B or 2B

1.5V, RL

, CL

35 pF Figure 1

4.5 to 5.5 4.0 15.0 20.0 1B or 2B

3.0V, RL

, CL

35 pF

tB-M Break-Before-Make 2.7 to 3.6 12.0 ns 1B or 2B

1.5V, RL

, CL

35 pF Figure 2

Time 4.5 to 5.5 7.0 1B or 2B

3.0V, RL

, CL

35 pF

Q Charge Injection 2.7 to 3.6 10.0 pC CL

1.0 nF, VGEN

0V, Figure 4

4.5 to 5.5 20.0 RGEN

OIRR OFF-Isolation 2.7 to 3.6



70.0 dB f

1MHz, RL

Figure 3

4.5 to 5.5



70.0

Xtalk Crosstalk 2.7 to 3.6



100 dB f

1MHz, RL

Figure 6

4.5 to 5.5



100



3db Bandwidth 2.7 to 3.6 300 MHz RL

Figure 7

4.5 to 5.5 300

THD Total Harmonic 2.7 to 3.6 0.002 %RL

600

, VIN

0.5V P.P, Figure 8

Distortion 4.5 to 5.5 0.002 f

20Hz to 20kHz

Symbol Parameter VCC TA



C to



CUnits Conditions

(V) Min Typ Max Min Max

CIN Control Pin Input Capacitance 0. 0 3.0 pF f

1MHz (see Figure 6)

COFF B Port OFF Capacitance 4.5 11.5 pF f

1MHz (see Figure 6)

CON A Port ON Capacitance 4.5 27.0 pF f

1MHz (see Figure 6)

5 www.fairchildsemi.com

FSA1256 • FSA1256A • FSA1257 • FSA1257A • FSA1258 • FSA1258A

AC Loading and Waveforms

CL includes Fixture and Stray Capacitance Logic Input Waveforms Inverted

for Switches that have the Opposite Logic Sense

FIGURE 1. Turn-On/Turn-Off Timing

FIGURE 2. Break-Before-Make Timing

FIGURE 3. OFF Isolation

www.fairchildsemi.com 6

FSA1256 • FSA1256A • FSA1257 • FSA1257A • FSA1258 • FSA1258A

AC Loading and Waveforms (Continued)

(

VOUT)(CL)

FIGURE 4. Charge Injection

FIGURE 5. Crosstalk

FIGURE 6. ON/OFF Capacitance Measurement Setup

7 www.fairchildsemi.com

FSA1256 • FSA1256A • FSA1257 • FSA1257A • FSA1258 • FSA1258A

AC Loading and Waveforms (Continued)

FIGURE 7. Bandwidth

FIGURE 8. Harmonic Distortion

www.fairchildsemi.com 8

FSA1256 • FSA1256A • FSA1257 • FSA1257A • FSA1258 • FSA1258A

Tape and Reel Specification

Tape Format For Micropak

REEL DIMENSIONS inches (millimeters)

Package Tape Number Cavity Cover Tape

Designator Section Cavities Status Status

Leader (Start End) 125 (typ) Empty Sealed

L8X Carrier 5000 Filled Sealed

Trailer (Hub End) 75 (typ) Empty Sealed

Tape

Size ABCDN W1 W2 W3

8 mm 7.0 0.059 0.512 0.795 2.165 0.331



0.059/



0.000 0.567 W1



0.078/



0.039

(177.8) (1.50) (13.00) (20.20) (55.00) (8.40



1.50/



0.00) (14.40) (W1



2.00/



1.00)

9 www.fairchildsemi.com

FSA1256 • FSA1256A • FSA1257 • FSA1257A • FSA1258 • FSA1258A Low RON Low Voltage Dual SPST Analog

Switch with Low ICCT “A” Option

Physical Dimensions inches (millimeters) unless otherwise noted

Pb-Free 8-Lead MicroPak, 1.6 mm Wide

Package Number MAC08A

Fairchild does not assum e any responsibility for use of any circuitry des cribed, n o circuit patent lice nses are implied and

Fairchild reserves the right at any time without notice to change said circuitry and specifications.

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FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT

DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD

SEMICONDUCTOR CORPORATION. As used herein:

1. Life suppor t de vices o r syst ems are dev ic es or syste ms

which, (a) are intended for surgical implant into the

body, or (b) support or sustain life, and (c) whose failure

to perform when properly used in accordance with

instruct ions fo r use provided in the l abe li ng, can be re a-

sonably expected to result in a significant injury to the

user.

2. A crit ical com ponen t in any com ponen t of a life s uppor t

device or system whose failure to perform can be rea-

sonabl y e xpec ted to cause th e fa i lure of the l ife suppor t

device or system, or to affect its safety or effectiveness.