74FST3400
4−Bit, 4−Port Bus Exchange
Switch
The ON Semiconductor 74FST3400 is a 4−bit, 4−port bus exchange
switch. The device is CMOS TTL compatible when operating between
4.0 and 5.5 Volts. The device exhibits extremely low R and adds
nearly zero propagation delay. The device adds no noise or ground
bounce to the system.
ON
http://onsemi.com
MARKING
DIAGRAMS
Features
• R t 4 W Typical
• Less Than 0.25 ns−Max Delay Through Switch
• Nearly Zero Standby Current
ON
24
1
24
FST3400
AWLYWW
1
• No Circuit Bounce
SOIC−24
DW SUFFIX
CASE 751E
• Control Inputs are TTL/CMOS Compatible
• Pin−For−Pin Compatible With QS3400, FST3400, CBT3400
• All Popular Packages: SOIC−24, TSSOP−24, QSOP−24
• All Devices in Package TSSOP are Inherently Pb−Free*
24
24
FST
3400
ALYW
BE
V
1
2
3
4
5
6
7
8
9
24
23
CC
1
C
D
B
0
3
A
0
22
21
20
19
18
17
16
15
14
13
TSSOP−24
DT SUFFIX
CASE 948H
1
3
3
B
0
A
D
C
D
B
0
3
2
C
1
A
1
2
2
B
1
A
24
1
24
D
C
NC
BX
1
2
FST3400
AWLYYWW
BX
10
11
12
0
1
BX
1
3
QSOP−24
QS SUFFIX
CASE 492B
GND
BX
2
Figure 1. 24−Lead Pinout
A
= Assembly Location
L, WL = Wafer Lot
Y, YY = Year
TRUTH TABLE
W, WW = Work Week
Function
Disconnect
Connect
BE
H
BX
BX
BX
BX
3
A0−3 B0−3
Hi−Z Hi−Z
0
1
2
X
X
X
X
PIN NAMES
L
BXi = L
BXi = H
C0−3 D0−3
D0−3 C0−3
Pin
BE
Description
Bus Enable Input (Active LOW)
Bus A, Bus B, Bus C, Bus D
Bus Exchange (Bit 0)
Bus Exchange (Bit 1)
Bus Exchange (Bit 2)
Bus Exchange (Bit 3)
No Connect
Exchange
L
NOTE: H = HIGH Voltage Level, L = LOW Voltage Level, X = Don’t Care,
NOTE: Hi−Z = High Impedance, i = 0, 1, 2 or 3
Ax, Bx, Cx, Dx
OE , OE
1
2
2
2
2
2
2
2
OE , OE
1
OE , OE
1
OE , OE
1
OE , OE
1
OE , OE
Ground
1
OE , OE
Power
1
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 2 of this data sheet.
*For additional information on our Pb−Free strategy and soldering details, please
download the ON Semiconductor Soldering and Mounting Techniques
Reference Manual, SOLDERRM/D.
Semiconductor Components Industries, LLC, 2005
1
Publication Order Number:
January, 2005 − Rev. 5
74FST3400/D