FN3311 Rev 0.00

Page 1 of 10

December 1992

FN3311

Rev 0.00

December 1992

CD4043BMS, CD4044BMS

CMOS Quad 3 State R/S Latches

DATASHEET

Pinout

CD4043BMS

TOP VIEW

CD4044BMS

TOP VIEW

14

15

16

9

13

12

11

10

1

2

3

4

5

7

6

8

Q4

Q1

R1

S1

ENABLE

S2

VSS

R2

VDD

S4

NC

S3

R3

Q3

Q2

R4

NC = NO CONNECTION

14

15

16

9

13

12

11

10

1

2

3

4

5

7

6

8

Q4

NC

S1

R1

ENABLE

R2

VSS

S2

VDD

R4

Q1

R3

S3

Q3

Q2

S4

NC = NO CONNECTION

Features

• High Voltage Types (20V Rating)

• Quad NOR R/S Latch- CD4043BMS

• Quad NAND R/S Latch - CD4044BMS

• 3 State Outputs with Common Output ENABLE

• Separate SET and RESET Inputs for Each Latch

• NOR and NAND Configuration

• 5V, 10V and 15V Parametric Ratings

• Standardized Symmetrical Output Characteristics

• 100% Tested for Quiescent Current at 20V

• Maximum Input Current of 1

a at 18V Over Full Pack-

age-Temperature Range;

- 100nA at 18V and 25oC

• Noise Margin (Over Full Package Temperature Range):

- 1V at VDD = 5V

- 2V at VDD = 10V

- 2.5V at VDD = 15V

• Meets All Requirements of JEDEC Tentative Standard

No. 13B, “Standard Specifications for Description of ‘B’

Series CMOS Devices”

Applications

• Holding Register in Multi-Register System

• Four Bits of Independent Storage with Output ENABLE

• Strobed Register

• General Digital Logic

• CD4043BMS for Positive Logic Systems

• CD4044BMS for Negative Logic Systems

Description

CD4043BMS types are quad cross-coupled 3-state CMOS NOR

latches and the CD4044BMS types are quad cross-coupled 3-

state CMOS NAND latches. Each latch has a separate Q output

and individual SET and RESET inputs. The Q outputs are con-

trolled by a common ENABLE input. A logic “1” or high on the

ENABLE input connects the latch states to the Q outputs. A logic

“0” or low on the ENABLE input disconnects the latch states from

the Q outputs, results in an open circuit feature allows common

busing of the outputs.

The CD4043BMS and CD4044BMS are supplied in these 16-

lead outline packages:

Braze Seal DIP

*H4T

†H4T

Frit Seal DIP

*H1C

†HIE

Ceramic Flatpack

*H3X

†H6W

*CD4043B Only

†CD4044B Only