CD40193 8-bit Up/Down Binary Counter

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The CD40193 is an 8-Bit Up/Down binary counter made by using monolithic complementary MOS (CMOS) integrated circuits. CD40193 is a part of the CD4000 IC series. Up/Down count is performed by two count inputs, one being held high while the other is clocked. The outputs change on the positive going transition of this clock. These counters feature preset inputs that are enabled when the load is a logical ‘‘0’’ and a clear which forces all outputs to ‘‘0’’ when it is at logical ‘‘1’’. Cascading of the counters can be done by the featured carry and borrow outputs presented on the IC. The IC has a wide array of workable voltages and directly interfaces with CMOS, NMOS, and TTL devices.

Up/Down Binary Counter

A binary up/down counter is a simple digital logic configuration that can count immediate as well as subsequent events in an increasing as well as decreasing order. For example a 4-bit binary up/down counter can count from 0000 to 1111 and also from 1111 to 0000. A simple Binary up/down counter can easily be made by rigging at least two D – type flip flops. A 4 bit binary counter will act as a decade counter by skipping any six outputs out of the 16 (24) outputs.

CD40193 Key Features

Wide supply voltage range 3V to 15V
High noise immunity 0.45 VDD (typ.)
Low power TTL compatibility Fan out of 2
- driving 74L
- or 1 driving 74LS
Carry and borrow outputs for easy expansion to N-bit by cascading
Asynchronous clear

CD40193 Pinout

Pin No	Pin Name	Description
1	DATA B	Input B of Counter
2	QB	Output B of Counter
3	QA	Output A of Counter
4	C-DOWN	Count Down Input Pin
5	C-UP	Count Up Input Pin
6	QC	Output C of Counter
7	QD	Output D of Counter
8	VSS	Source Supply
9	DATA D	Input D of Counter
10	DATA C	Input C of Counter
11	LOAD	Load Input Pin
12	CARRY	Carry Output Pin
13	BORROW	Borrow Output Pin
14	CLEAR	Clear Input Pin
15	DATA A	Input A of Counter
16	VDD	Drain Supply