CD4536 Programmable Timer

Contents hide

CD4536 is a programmable timer that comprises 24 ripple binary counter stages. The salient feature of this device is its flexibility. The device can count from 1 to 224 or the first 8 stages can be bypassed to allow an output, selectable by a 4-bit code, from any one of the remaining 16 stages. It can
be driven by an external clock or an RC oscillator that can be constructed using on-chip components. The CD4536 is a popular timer IC due to it’s use in high quality electronic timers for AC/DC appliances. CD4536 has a wide array of features such as high noise immunity and efficient thermal compensation. This IC is very simple to use and can be interfaced directly with CMOS, NMOS & TTL devices.

Programmable Timer?

Programmable Timers are simple circuits that offer measurement, display and control in applications that contain variables. They can operate with a single input or, in some cases, a pair of signals. Programmable timers are usually electronic and use digital displays, precise digital set-ability, high accuracy, and fast reset times.

CD4536 Key Features

High Voltage Type (20V Rating)
24 Flip-Flop Stage – Counts from 20 to 224
Last 16 Stages Selectable by BCD Select Code
Bypass Input Allows Bypassing First 8 Stages
On-Chip RC Oscillator Provision
Clock Inhibit Input
Schmitt Trigger in clock Line Permits Operation with Very Long Rise and Fall Times
On-Chip Monostable Output Provision
Typical fCL = 3MHz at VDD = 10V
Test Mode Allows Fast Test Sequence
Set and Reset Inputs
Capable of Driving Two Low Power TTL Loads, One
- Lower Power Schottky Load, or Two HTL Loads Over the Rated Temperature Range
100% Tested for Quiescent Current at 20V
5V, 10V and 15V Parametric Ratings
Standardized, Symmetrical Output Characteristics

CD4536 Pinout

Pin No	Pin Name	Description
1	SET	Set Pin
2	RESET	Reset Pin
3	IN 1	Input Pin 1
4	OUT 1	Output Pin 1
5	OUT 2	Output Pin 2
6	8-BYPASS	8-Bypass pin
7	CLOCK INHIBIT	Clock Inhibit Pin
8	VSS	Source Supply
9	A	Binary Select Data Pin A
10	B	Binary Select Data Pin B
11	C	Binary Select Data Pin C
12	D	Binary Select Data Pin D
13	DECODE OUT	Decoded Out Pin
14	OSC INHIBIT	Oscillator Inhibit Pin
15	MONO IN	Monostable Pin
16	VDD	Drain Supply