54298 Quad 2-Port Register (Multiplexer With Storage)
June 1989
54298
Quad 2-Port Register (Multiplexer With Storage)
General Description
The ’298 is a quad 2-port register It is the logical equivalent
of a quad 2-input multiplexer followed by a quad 4-bit edge-
triggered register A Common Select input selects between
two 4-bit input ports (data sources) The selected data is
transferred to the output register synchronous with the
HIGH-to-LOW transition of the Clock input
Features
Y
Y
Select from two data sources
Fully edge-triggered operation
Connection Diagram
Logic Symbol
Dual-In-Line Package
TL F 10215 – 2
V
CC
e
Pin 16
GND
e
Pin 8
TL F 10215 – 1
Order Number 54298DMQB or 54298FMQB
See NS Package Number J16A or W16A
Pin Names
S
CP
I0a–I0d
I1a–I1d
Qa Qd
Description
Common Select Input
Clock Pulse Input (Active Falling Edge)
Source 0 Data Inputs
Source 1 Data Inputs
Flip-Flop Outputs
C
1995 National Semiconductor Corporation
TL F 10215
RRD-B30M105 Printed in U S A
NSC [ NATIONAL SEMICONDUCTOR ]
