INPUT EQUIVALENT CIRCUIT

PIN DESCRIPTION

PI N No

SYMBOL

NAME AND FUNCT ION

1, 2, 3

A, B, C

Latch Select

4, 5, 6, 7, 9,

10, 11, 12

Q0 to Q7

latch Outputs

13

DATA IN

Data Inputs

14

ENABLE

Latch Enable Input

15

CLEAR

Conditional Reset Input

8

GND

Ground (0V)

16

Positive Supply Voltage

TRUTH TABLE

INPUT S

OUTPUTS OF

ADDRESSED LATCH

EACH O THER OUTPUT

F UNCTION

CLEAR

ENABL E

H

L

D

QI0

ADDRESSABLE LATCH

H

H

Qi0

Qi0

MEMORY

L

L

D

H

8-LINE DEMULTIPLEXER

SELECT INPUT S

L AT CH ADDRESSED

CBA

LLL

Q0

LL

H

Q1

LHL

Q2

LH

H

Q3

HL

L

Q4

HLH

Q5

HH

L

Q6

HHH

Q7

D:The level at the data input

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

ABSOLUTE MAXIMUM RATINGS

Symbol

Parameter

Val ue

Unit

Supply Voltage

-0.5 to +7.0

V

DC Input Voltage

V

DC Output Voltage

V

DC Input Diode Current

± 20

mA

DC Output Diode Current

± 20

mA

DC Output Current Per Pin

100

mA

Ground Current

- 800

mA

50

mA

Power Dissipation

500 (*)

mW

Storage Temperature

-65 to +150

Lead Temperature (10 sec)

300

Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these condition is not implied.

(*) 500 mW:

M74HCT7259

3/11