74FST3126 Datasheet, PDF (1/8 Pages) ON Semiconductor – 4-Bit Bus Switch

74FST3126
4-Bit Bus Switch
The ON Semiconductor 74FST3126 is a quad, high performance
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.
The device consists of four independent 1–bit switches with
separate Output/Enable (OE) pins. Port A is connected to Port B when
OE is high. If OE is low, the switch is high Z.
• 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 QS3126, FST3126, CBT3126
• All Popular Packages: QSOP–16, TSSOP–14, SOIC–14
OE₁ 1
1A 2
1B 3
OE₂ 4
2A 5
2B 6
GND 7
14 V_CC
13 OE₄
12 4A
11 4B
10 OE₃
9 3A
8 3B
Figure 1. Pin Assignment for
SOIC and TSSOP
NC 1
OE₁ 2
1A 3
1B 4
OE₂ 5
2A ⁶
2B 7
GND ⁸
16 V_CC
15 OE₄
14 4A
13 4B
12 OE₃
11 _3A
10 3B
9 _NC
Figure 2. Pin Assignment
for QSOP
© Semiconductor Components Industries, LLC, 2001
1
August, 2001 – Rev. 0
http://onsemi.com
14
1
SO–14
D SUFFIX
CASE 751A
MARKING
DIAGRAMS
14
FST3126
AWLYWW
1
14
14
1
TSSOP–14
DT SUFFIX
CASE 948G
FST
3126
ALYW
1
16
16
1
QSOP–16
QS SUFFIX
CASE 492
S3126
ALYW
1
A
= Assembly Location
L, WL = Wafer Lot
Y
= Year
W, WW = Work Week
PIN NAMES
Pin
OE₁, OE₂, OE₃, OE₄
1A, 2A, 3A, 4A
1B, 2B, 3B, 4B
NC
Description
Bus Switch Enables
Bus A
Bus B
Not Connected
ORDERING INFORMATION
Device
Package
74FST3126D
SO–14
74FST3126DR2
SO–14
74FST3126DT TSSOP–14
74FST3126DTR2 TSSOP–14
74FST3126QS
QSOP–16
74FST3126QSR QSOP–16
Shipping
55 Units/Rail
2500 Units/Reel
96 Units/Rail
2500 Units/Reel
98 Units/Rail
2500 Units/Reel
Publication Order Number:
74FST3126/D