Quad TRI-STATE NOR(NAND) R/S Latches - National Semiconductor
Description
CD4043BM CD4043BC Quad TRI-STATE NOR R S Latches CD4044BM CD4044BC Quad TRI-STATE NAND R S Latches
February 1988
CD4043BM CD4043BC Quad TRI-STATE NOR R S Latches CD4044BM CD4044BC Quad TRI-STATE NAND R S Latches
General Description
CD4043BM CD4043BC are quad cross-couple TRI-STATE CMOS NOR latches and CD4044BM CD4044BC are quad cross-couple TRI-STATE CMOS NAND latches Each latch has a separate Q output and individual SET and RESET inputs There is a common TRI-STATE ENABLE input for all four latches A logic ‘‘1’’ on the ENABLE input connects the latch states to the Q outputs A logic ‘‘0’’ on the ENABLE input disconnects the latch states from the Q outputs resulting in an open circuit condition on the Q output The TRI-STATE feature allows common bussing of the outputs
Features
Y Y Y Y Y Y
Wide supply voltage range 3V to 15V Low power 100 nW (typ ) High noise immunity 0 45 VDD (typ ) Separate SET and RESET inputs for each latch NOR and NAND configuration TRI-STATE output with common output enable
Applications
Y Y Y Y
Multiple bus storage Strobed register Four bits of independent storage with output enable General digital logic
Connection Diagrams
CD4043BM CD4043BC Dual-In-Line and Flat Packages CD4044BM CD4044BC Dual-In-Line and Flat Packages
TL F 5967 – 3
TL F 5967 – 4
Top View
Top View Order Number CD4043B or CD4044B
Truth Table
CD4043BM CD4043BC
S X 0 1 0 1 R X 0 0 1 1 E 0 1 1 1 1 Q OC NC 1 0 D
CD4044BM CD4044BC
S X 1 0 1 0 R X 1 1 0 0 E 0 1 1 1 1 Q OC NC 1 0 DD
OC NC X D DD
TRI-STATE No change Don’t care Dominated by S e 1 input Dominated by R e 0 input
C1995 National Semiconductor Corporation
TL F 5967
RRD-B30M105 Printed in U S A
Absolute Maximum Ratings (Notes 1 and 2)
If Military Aerospace specified devices are required please contact the National Semiconductor Sales Office Distributors for availability and specifications Supply Voltage (VDD) Input Voltage (VIN) Storage Temperature Range (TS) Power Dissipation (PD) Dual-In-Line Small Outline ...
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