74FST3257_11 Datasheet, PDF (1/8 Pages) ON Semiconductor – Quad 2:1 Multiplexer/ Demultiplexer Bus Switch

74FST3257
Quad 2:1 Multiplexer/
Demultiplexer Bus Switch
The ON Semiconductor 74FST3257 is a quad 2:1, high performance
multiplexer/demultiplexer bus switch. The device is CMOS TTL
compatible when operating between 4 and 5.5 Volts. The device
exhibits extremely low R_ON and adds nearly zero propagation delay.
The device adds no noise or ground bounce to the system.
Features
• R_ON t 4 W Typical
• Less Than 0.25 ns−Max Delay Through Switch
• Nearly Zero Standby Current
• No Circuit Bounce
• Control Inputs are TTL/CMOS Compatible
• Pin−For−Pin Compatible With QS3257, FST3257, CBT3257
• All Popular Packages: SOIC−16, TSSOP−16, QFN16
• These Devices are Pb−Free and are RoHS Compliant
S1
1B₁ 2
1B₂ 3
1A 4
2B_{1 5}
2B₂ 6
2A ₇
GND 8
16 V_CC
15 OE
14 4B₁
13 4B₂
12 4A
11 3B₁
10 3B₂
9 3A
1B₁ 2
S V_CC
1 16
1B₂ 3
1A 4
GND
2B_{1 5}
2B₂ 6
2A 7
89
GND 3A
15 OE
14 4B₁
13 4B₂
12 ^4A
11 3B₁
10 3B₂
Figure 1. 16−Lead Pinout Diagrams
S
OE
Function
X
H
Disconnect
L
L
H
L
A = B₁
A = B₂
Figure 2. Truth Table
http://onsemi.com
16
1
SOIC−16
D SUFFIX
CASE 751B
MARKING
DIAGRAMS
16
FST3257G
AWLYWW
1
16
1
TSSOP−16
DT SUFFIX
CASE 948F
16
FST
3257
ALYW G
G
1
1
QFN16
MN SUFFIX
CASE 485AW
3257
ALYWG
G
A
= Assembly Location
WL, L = Wafer Lot
Y
= Year
WW, W = Work Week
G or G = Pb−Free Package
(Note: Microdot may be in either location)
PIN NAMES
Pin
OE₁, OE₂
S₀, S₁
A
B₁, B₂, B₃, B₄
Description
Bus Switch Enables
Select Inputs
Bus A
Bus B
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 2 of this data sheet.
© Semiconductor Components Industries, LLC, 2011
1
June, 2011 − Rev. 7
Publication Order Number:
74FST3257/D