Fairchild Semiconductor CD4043BCSJX, CD4043BCSJ, CD4043BCN, CD4043BCMX, CD4043BCM Datasheet

October 1987
Revised January 1999

CD4043BC • CD4044BC Quad 3-STATE NOR R/S Latches • Quad 3-STATE NAND R/S Latches

© 1999 Fairchild Semiconductor Corporation DS005967.prf www.fairchildsemi.com

CD4043BC • CD4044BC
Quad 3-STATE NOR R/S Latches •

Quad 3-STATE NAND R/S Latches

General Description

The CD4043BC are quad cross-couple 3-STATE CMOS
NOR latches, and the CD4044BC are quad cross-couple 3­STATE CMOS NAND latches. Each latch has a separate Q
output and individual SET and RESET inputs. There is a
common 3-STATE ENABLE input for all four latches. A

logic “1” on the ENABLE inpu t conne cts the latch sta tes 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 3-S TATE fea­ture allows common bussing of the outputs.

Features

■ Wide supply voltage range: 3V to 15V

■ Low power: 100 nW (typ.)

■ High noise immunity: 0.45 V

DD

(typ.)

■ Separate SET and RESET inputs for each latch

■ NOR and NAND configuration

■ 3-ST ATE output with common output enable

Applications

• Multiple bus storage

• Strobed register

• Four bits of independent storage with output enable

• General digital logic

Ordering Code:

Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.

Connection Diagrams

Pin Assignments for DIP, SOIC and SOP

CD4043BC

Top View

Pin Assignments for DIP and SOIC

CD4044BC

Top V iew

Order Number Package Number Package Description

CD4043BCM M16A 16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150” Narrow Body
CD4043BCN N16E 16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300” Wide
CD4044BCM M16A 16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150” Narrow Body

CD4044BCSJ M16D 16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide

CD4044BCN N16E 16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300” Wide

www.fairchildsemi.com 2

CD4043BC • CD4044BC

Block Diagrams

CD4043BC CD4044BC

Truth Tables

CD4043BC

CD4044BC

OC = 3-STATE
NC = No change
X = Don’t care

∆ = Dominated by S = 1 input
∆∆ = Dominated by R = 0 input

SREQ

XX0OC
001NC
1011
0110
111∆

SREQ

XX0OC
111NC
0111
1010
001∆∆