HCF4536B(2002) Ver la hoja de datos (PDF) - STMicroelectronics

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HCF4536B
(Rev.:2002)

PROGRAMMABLE TIMER

STMicroelectronics 

HCF4536B

for the on-chip monostable oscillator. Grounding

of the MONO IN terminal through a resistor of 10

KΩ or higher, disables the one shot circuit and

connects the decoder directly to the DECODE

OUT terminal. A resistor to VDD and a capacitor to

ground from the MONO IN terminal enables the

one-shot circuit and controls its pulse width. A fast

test mode is enabled by a logic "1" on 8-BYPASS,

SET, and RESET. This mode divides the 24-stage

counter into three 8-stage sections to facilitate a

fast test sequence.

INPUT EQUIVALENT CIRCUIT

FUNCTIONAL DIAGRAM

PIN DESCRIPTION

PIN No

SYMBOL NAME AND FUNCTION

9, 10, 11, 12 A, B, C, D Binary Select Input

1

SET

Set input

2

RESET Reset Input

15

MONO IN

Monostable OscillatorTim-

ing Input

6

8BYPASS

8Bypass input( bypass

the first 8 stages)

3

IN1

External Clock Input or

RC oscillator Input

4, 5

OUT1, OUT2 Outputs

13

DECODE

OUT

Decode Out Terminal

7

CLOCK

INHIBIT

Clock Inhibit Input

14

OSC.

INHIBIT

Oscillator Inhibit Input

8

VSS

Negative Supply Voltage

16

VDD

Positive Supply Voltage

2/13

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