74F569/74LS569 4-Bit Bi-directional Counter IC With 3-State Output

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2 74F569/74LS569 Key Features & Specifications

The 74F569/74LS569 is a fully synchronous Up/Down binary counter. It features preset capabilities for programmable operation, carry look ahead for programmable operation, carry look ahead for easy cascading, and U/D input to control the direction of counting. For maximum flexibility. It also features both Synchronous and Master Reset inputs as well as both Clocked Carry (CC) and Terminal Count (TC) outputs. All state changes except Master Reset are initiated by rising (+ve) edge of the clock. A High signal on the Output Enable (OE) input forces the output buffers into the high impedance state but does not prevent counting, resetting, or parallel loading. The output of the IC always comes in TTL which makes it easy to work with other TTL devices and microcontrollers. The IC 74F569 is compact in size and it has a much faster speed which makes it reliable in every kind of application.

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What Binary Counter?

A Binary Counter is a serial digital counter that counts ten digits. it resets for every new clock input. As it can go through 10 unique combinations of output, it is also called as “Decade counter”. A binary counter can count 0000, 0001, 0010, 1000, 1001, 1010, 1011, 1110, 1111, 0000, and 0001 and so on. A 4 bit binary counter will act as a decade counter by skipping any six outputs out of the 16 (24) outputs.

74F569/74LS569 Key Features & Specifications

Function: Counter
Product type: Binary
Rating: Catalog
Package: DIP
Pins: 16
Bits: 4
Operating Voltage: 5V
Maximum clock frequency: 32MHz
Synchronous counting
Synchronously programmable
Typical Rise Time: 18ns
Typical Fall Time: 18ns
Diode-clamped inputs
Synchronous counting and loading
Look ahead carry capability for easy cascading
Preset capability for programmable operation
Master Reset (MR) overrides all other inputs
Synchronous Reset (SR) overrides counting and parallel loading
Clock Carry (CC) output to be used as a clock for flip-flops, register, and counters
3-State outputs for bus organized systems
20 Pin DIP package

74F569/74LS569 Pinout

Pin No.	Pin Name	Description
1	U/D’	Up/Down count control input
2	CP	Clock Pulse Input
3	P0	Parallel Data Input Pin P0
4	P1	Parallel Data Input Pin P1
5	P2	Parallel Data Input Pin P2
6	P3	Parallel Data Input Pin P3
7	CEP’	Active Low Count Enable Parallel Input Pin
8	MR’	Active Low Master reset Input
9	SR’	Active Low Synchronous Reset Input
10	GND	Ground Pin
11	PE’	Active Low Parallel Enable Input
12	CET’	Active Low Count Enable Trickle Input
13	O3	Data Output O3
14	O2	Data Output O2
15	O1	Data Output O1
16	O0	Data Output O0
17	OE’	Active Low Output Enable
18	CC’	Active Low Clocked Carry Output
19	TC’	Active Low Terminal Count Output
20	Vcc	Chip Supply Voltage