The 74F579 IC is a part of the high-speed 74F family. 74F579 IC is a fully synchronous 8-stage Up/Down Counter with multiplexed 3-State I/O ports for bus-oriented applications. It features a preset capability for programmable operation, carries a look-ahead for easy cascading, and a U/D’ input to control the direction of counting. All state changes, whether in counting or parallel loading, are initiated by the rising edge of the clock. The 74F579 IC offers a wide range of features including thermal overload & ESD protection, which makes it suitable to be deployed in high speed, low-noise environment.
What is a Binary Counter?
A Binary Counter is a digital counter that counts 10 digits. It resets for every new clock input. As it can go through 10 unique combinations of output, therefore it is also called a “Decade counter”. A binary counter can count 0000, 0001, 0010, 1000, 1001, 1010, 1011, 1110, 1111, 0000, and 0001 and so on.
74F579 Pinout
| Pin No. | Pin Name | Description |
|---|---|---|
| 1 | CP | Clock Pulse Inut |
| 2 | (I/O)0 | Data (I/O) Pin 0 |
| 3 | (I/O)1 | Data (I/O) Pin 1 |
| 4 | (I/O)2 | Data (I/O) Pin 2 |
| 5 | (I/O)3 | Data (I/O) Pin 3 |
| 6 | GND | Ground Pin |
| 7 | (I/O)4 | Data (I/O) Pin 4 |
| 8 | (I/O)5 | Data (I/O) Pin 5 |
| 9 | (I/O)6 | Data (I/O) Pin 6 |
| 10 | (I/O)7 | Data (I/O) Pin 7 |
| 11 | OE’ | Active Low Output Enable Input |
| 12 | CS’ | Active Low Chip Select input |
| 13 | PE’ | Active Low Parallel Enable Input |
| 14 | U/D’ | Up/Down count control input |
| 15 | TC’ | Active Low Terminal Count Output |
| 16 | Vcc | Chip Supply Voltage |
| 17 | CET’ | Active Low Count Enable Trickle input |
| 18 | CEP’ | Active Low Count Enable Parallel input |
| 19 | SR’ | Active Low Synchronous Reset input |
| 20 | MR’ | Active Low Master Reset input |
74F579 Key Features & Specifications
- Function: Counter
- Product type: Binary
- Rating: Catalog
- Package: DIP
- Pins: 20
- Bits: 8
- IOH: -3.0mA
- IOL: 24mA
- Operating Voltage: 5V
- Fully Synchronous Operation
- Typical Rise Time: 18ns
- Typical Fall Time: 18ns
- Diode-clamped inputs
- Look ahead carry capability for easy cascading
- Built-In Cascading Carry Capability
- Count Frequency: 115 MHz (Typ)
- Supply Current 100 mA (Typ)
- U/D’ Pin to Control Direction of Counting
- Separate Pins for Master Reset and Synchronous Reset
- Center Power Pins to Reduce Effects of Package Inductance
- 3-State outputs for bus organized systems
- 20 Pin DIP package
Applications
- Usually used in designing Astable frequency dividers & counter circuits.
You can download this datasheet for 74F579 Octal 8-Bit Bidirectional Binary Counter IC from the link given below:
See Also: 7404 NOT Gate IC | 74LS56 50-to-1 Frequency Divider IC | 74LS139 Dual 1-Of-4 Decoder/Demultiplexer IC – Datasheet
