74FST3861
Quad 2:1 10-Bit Bus Switch
Multiplexer/Demultiplexer
Bus Switch
The ON Semiconductor 74FST3861 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
http://onsemi.com
exhibits extremely low R
The device adds no noise or ground bounce to the system.
and adds nearly zero propagation delay.
ON
MARKING
DIAGRAMS
• R
t 4 W Typical
ON
• 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 QS3861, FST3861, CBT3861
• All Popular Packages: QSOP–24, TSSOP–24, SOIC–24
24
1
24
FST3861
AWLYWW
1
SO–24
D SUFFIX
CASE 751E
24
24
FST
3861
ALYW
NC
V
OE
1
2
3
4
5
6
7
8
9
24
23
CC
A
A
2
1
1
22
21
20
19
18
17
16
15
14
13
B
B
2
Input
OE
1
TSSOP–24
DT SUFFIX
CASE 948H
1
A
A
4
3
Operation
B
B
4
3
A Port = B Port
L
A
A
6
5
B
B
6
Disconnect
5
H
A
7
24
1
NOTE:
H = HIGH Voltage Level
L = LOW Voltage Level
A
8
B
B
8
7
24
A
9
10
11
12
FST3861
AWLYYWW
A
GND
B
10
9
1
B
10
QSOP–24
QS SUFFIX
CASE 492B
SO24–7/SO24–8/SO24–9
Figure 1. 24–Lead
Pinout
Figure 2. Truth Table
A
= Assembly Location
L, WL = Wafer Lot
Y, YY = Year
W, WW = Work Week
PIN NAMES
Pin
Description
ORDERING INFORMATION
OE
Bus Switch Enables
Device
Package
Shipping
NC
No Connect
Bus A
74FST3861D
SO–24
SO–24
48 Units/Rail
2500 Units/Reel
96 Units/Rail
A
B
to A
to B
1
10
74FST3861DR2
74FST3861DT
Bus B
TSSOP–24
1
10
74FST3861DTR2 TSSOP–24 2500 Units/Reel
74FST3861QS
QSOP–24
QSOP–24
96 Units/Rail
74FST3861QSR
2500 Units/Reel
Semiconductor Components Industries, LLC, 2002
1
Publication Order Number:
February, 2002 – Rev. 2
74FST3861/D