FSA1256(A) / FSA1257(A) / FSA1258(A)
Low-RON Low-Voltage, Dual SPST Analog Switch
with Low-ICCT “A” Option
Features
Description
FSA1256A, FSA1257A, FSA1258A Feature Low
ICCT when S Input is Lower than VCC
Maximum 1.1 Ω On Resistance (RON) for
4.5 V Supply
0.4 Ω Max. RON Flatness for 4.5 V Supply
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 1.1 Ω maximum at 4.5 V
VCC. The FSA1256, FSA1257, and FSA1258 operate
over a wide VCC range of 1.65 V to 5.5 V. The
FSA1256A, FSA1257A, and FSA1258A operation range
is 2.7 V to 5.5 V. These devices are fabricated with submicron 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.
Space-Saving Pb-Free MicroPak™ Packaging
Broad VCC Operating Range:
- FSA1256, FSA1257, FSA1258: 1.65 V to 5.5 V
- FSA1256A, FSA1257A, FSA1258A: 2.7 V to
5.5 V
Fast Turn-On and Turn-Off Times
Over-Voltage Tolerant TTL-Compatible Control Input
FSA1258, FSA1258A Feature Break-Before-Make
Enable Circuitry
For additional performance information, please contact
analogswitch@fairchildsemi.com.
Applications
IMPORTANT NOTE:
Cell Phone, PDA, Digital Camera, and Notebook
LCD Monitor, TV, and Set-Top Box
Ordering Information
Part Number
FSA1256L8X
Top Mark
Package Description
Packing Method
EB
8-Lead, MicroPak™, 1.6 mm Wide
5000 Units Tape and Reel
FSA1256AL8X
FN
8-Lead, MicroPak, 1.6 mm Wide
5000 Units Tape and Reel
FSA1257L8X
EC
8-Lead, MicroPak, 1.6 mm Wide
5000 Units Tape and Reel
FSA1257AL8X
FP
8-Lead, MicroPak, 1.6 mm Wide
5000 Units Tape and Reel
FSA1258L8X
ED
8-Lead, MicroPak, 1.6 mm Wide
5000 Units Tape and Reel
FSA1258AL8X
FS
8-Lead, MicroPak, 1.6 mm Wide
5000 Units Tape and Reel
MicroPak™ is a trademark of Fairchild Semiconductor Corporation.
© 2004 Fairchild Semiconductor Corporation
FSA1256(A) / FSA1257(A) / FSA1258(A) Rev. 1.0.9
www.fairchildsemi.com
FSA1256(A) / FSA1257(A) / FSA1258(A) — Low-RON Low-Voltage, Dual SPST Analog Switch with Low-ICCT “A” Option
November 2013
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
Vcc
1
1S
2B
2
2A
3
8
7
1A
6
1B
5
2S
4
GND
Figure 3.
FSA1258, FSA1258A
Truth Table
Control Input, 1S
Function
Control Input 2S
Function
LOW Logic Level
1A Connected to 1B
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
© 2004 Fairchild Semiconductor Corporation
FSA1256(A) / FSA1257(A) / FSA1258(A) Rev. 1.0.9
www.fairchildsemi.com
2
FSA1256(A) / FSA1257(A) / FSA1258(A) — Low-RON Low-Voltage, Dual SPST Analog Switch with Low-ICCT
Analog Symbols
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
VCC
Parameter
Supply Voltage
(1)
VS
Switch Voltage
Vin
(1)
Input Voltage
Min.
Max.
Units
-0.5
6.0
V
-0.5
VCC +0.5
V
-0.5
6.0
V
180
mW
Power Dissipation at 85°C, MicroPak 8-Lead Package
IIK
Input Diode Current
-50
mA
ISW
Switch Current
200
mA
Peak Switch Current (Pulsed at 1ms Duration,
