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∆∆
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