TL/F/11652
74LVX3L383
10-Bit
Low
Power
Bus-Exchange
Switch
December 1996
74LVX3L383
10-Bit Low Power Bus-Exchange Switch
General Description
The LVX3L383 provides two sets of high-speed CMOS TTL-
compatible bus switches. The low on resistance of the
switch allows inputs to be connected to outputs without
adding propagation delay or generating additional ground
bounce noise. The device operates as a 10-bit bus switch or
a 5-bit bus exchanger. The bus exchange (BX) signal pro-
vides nibble swapping of the AB and CD pairs of signals.
This exchange configuration allows byte swapping of buses
in systems. It can also be used as a quad 2-to-1 multiplexer
and to create low delay barrel shifters. The bus enable (BE)
signal turns the switches on.
Features
Y
5X switch connection between two ports
Y
Zero propagation delay
Y
Ultra low power with 0.2 mA typical I
CC
Y
Zero ground bounce in flow-through mode
Y
Control inputs compatible with TTL level
Y
Available in SOIC, TSSOP and QSOP (SSOP, 0.15
body width) packages
Logic Diagram
TL/F/11652–1
Truth Table
BE BX A
0
–A
4
B
0
–B
4
Function
H X High-Z State High-Z State Disconnect
LLC
0
–C
4
D
0
–D
4
Connect
LHD
0
–D
4
C
0
–C
4
Exchange
Connection Diagram
Pin Assignment for
SOIC, QSOP and TSSOP
TL/F/11652–2
Pin Names Description
BE Bus Switch Enable
BX Bus Exchange
A
0
–A
4
,B
0
–B
4
Buses A, B
C
0
–C
4
,D
0
–D
4
Buses C, D
SOIC JEDEC QSOP TSSOP
Order Number 74LVX3L383WM 74LVX3L383QSC 74LVX3L383MTC
74LVX3L383WMX 74LVX3L383QSCX 74LVX3L383MTCX
See NS M24B MQA24 MTC24
Package Number
TRI-STATE is a registered trademark of National Semiconductor Corporation.
C
1996 National Semiconductor Corporation RRD-B30M17/Printed in U. S. A. http://www.national.com