M74HC279 Просмотр технического описания (PDF) - STMicroelectronics

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M74HC279

QUAD S - R LATCH

STMicroelectronics 

M74HC279

IINPUT AND OUTPUT EQUIVALENT CIRCUIT

LOGIC DIAGRAM

PIN DESCRIPTION

PIN No

1, 5, 10, 14

2, 3, 6, 11,

12, 15

4, 7, 9, 13

8

16

SYMBOL

1R to 4R

1S1, 1S2,

2S, 3S1,

3S2, 4S

1Q to 4Q

GND

VCC

NAME AND FUNCTION

Reset Inputs (Active Low)

Set Inputs (Active Low)

Outputs

Ground (0V)

Positive Supply Voltage

TRUTH TABLE

S#

R

Q

H

H

Q0

L

H

H

H

L

L

L

L

H

NOTE : Q0 = The level of Q before the indicated input condition was

established.

# : For latches with double S input :

H : Both S inputs high

L : One of both inputs low

This logic diagram has not be used to estimate propagation delays

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