The ‘LS169B and ‘S169 are 4-bit binary counters. The 74LS169 features an internal carry look-ahead for cascading in high speed counting applications. Synchronous operation is provided by having all flip-flops clocked simultaneously so that the outputs change coincident with each other when so instructed by the count-enable inputs and internal gating. These counters are fully programmable; that is the outputs may each be preset to either level. The 74LS92 IC has a wide range of working voltage, a wide range of working conditions, and directly interfaces with CMOS, NMOS, and TTL.
What is a 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.
74LS169 Pinout
74LS169 Pin Configuration
| Pin No | Pin Name | Description |
|---|---|---|
| 1 | U/D’ | Up-Down Count Control Input |
| 2 | CLK | Clock Pulse Input |
| 3 | A | Parallel Data Input A |
| 4 | B | Parallel Data Input B |
| 5 | C | Parallel Data Input C |
| 6 | D | Parallel Data Input D |
| 7 | ENP’ | Active Low Count Enable Parallel Input |
| 8 | GND | Ground |
| 9 | LOAD’ | Active low parallel load enable input |
| 10 | ENT’ | Active Low Count Enable Trickle Input |
| 11 | QD | Flip-Flop Output D |
| 12 | QC | Flip-Flop Output C |
| 13 | QB | Flip-Flop Output B |
| 14 | QA | Flip-Flop Output A |
| 15 | RCO’ | Active low Terminal Count Output |
| 16 | VCC | Chip supply Voltage |
74LS169 Features & Specifications
- No. of Bits: 4
- Typical Operating Voltage: 5V
- Output type: CMOS
- Operating Voltage Range: 4.5V to 5.5V
- Output current when high: -0.4mA
- Output current when low: 8mA
- CKB and CKA input clock frequency: 32MHz and 16MHz resp.
- CKA and CKB pulse width: 15nS and 30nS resp.
- Programmable Look-Ahead Up/Down Binary Counter
- Fully Synchronous Operation
- Internal Look-Ahead
- Carry Output for Cascading
- Standard TTL Switching Voltages
- Available in 14-pin PDIP, GDIP, PDSO packages
- Function: Counter
- Product type: Binary
- Rating: Catalog
Applications
- Astable frequency divider or counter circuit
- Timing related applications
- They are also used in digital devices such as digital clocks, electronic meters, and other electronic devices that display numerical information.
You can download this Datasheet for 74LS169 Synchronous 4-Bit Up/Down Binary Counter from the link given below:
See Also: 74LS47 BCD to 7-Segment Display Decoder IC – Datasheet | 74LS32 Quad 2 – Input OR Logic Gate IC – Datasheet | 74LS109 Dual JK Positive Edge-Triggered Flip-Flop IC – Datasheet
