HCF4099B(2002) 데이터 시트보기 (PDF) - STMicroelectronics

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HCF4099B
(Rev.:2002)

8 BIT ADDRESSABLE LATCH

STMicroelectronics 

HCF4099B

IINPUT EQUIVALENT CIRCUIT

FUNCTIONAL DIAGRAM

PIN DESCRIPTION

PIN No

5, 6, 7

9, 10, 11, 12,

13, 14, 15, 1

3

2

4

8

16

SYMBOL NAME AND FUNCTION

A0 to A2 Address Inputs

Q0 to Q7 Latch Outputs

DATA

RESET

WRITE

DISABLE

VSS

VDD

Data Inputs

Reset Input

Write Disable Input

Negative Supply Voltage

Positive Supply Voltage

TRUTH TABLE

SELECT INPUTS

LATCH ADDRESSED

C

B

A

L

L

L

Q0

L

L

H

Q1

L

H

L

Q2

L

H

H

Q3

H

L

L

Q4

H

L

H

Q5

H

H

L

Q6

H

H

H

Q7

INPUTS

WRITE DISABLE

RESET

OUTPUTS OF

ADDRESSED

LATCH

EACH OTHER

OUTPUT

FUNCTION

L

L

D

Qi0

ADDRESSABLE LATCH

L

H

Qi0

Qi0

MEMORY

H

L

D

L

DEMULTIPLEXER

H

H

L

L

CLEAR ALL BITS TO "0"

D: The level at the data input ; Qi0 The level before the indicated steady state input conditions were established, (i=0, 1,...7)

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