The 74LS290 is a part of the 74XXYY IC series. 74LS290 is a high speed 4 bit ripple type counters partitioned into two sections. Each counter has a divide-by-two section and a divide-by-five section, which are triggered by a High to Low transition on the clock inputs. The 74LS290 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 Decade/Binary Ripple 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.
74LS290 Key Features & Specifications
- Technology Family: LS
- 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
- Corner Power Pin Versions of the LS90 and LS93
- Low Power Consumption: Typically 45 mW
- High Count Rates: Typically 42 MHz
- Choice of Counting Mode: BCD, Bi-Quinary, Binary
- Input Clamp Diodes Limit High Speed Termination Effects
- Standard TTL Switching Voltages
- Available in 14-pin PDIP, GDIP, PDSO packages
- Function: Counter
- Product type: Binary
- Rating: Catalog
74LS290 Pinout
| Pin No. | Pin Name | Description |
|---|---|---|
| 1 | MS | Master Set Input |
| 2 | NC | Not Used |
| 3 | MS | Master Set Input |
| 4 | Q2 | Outputs from ÷ by 5 section |
| 5 | Q1 | Outputs from ÷ by 5 section |
| 6 | NC | Not used |
| 7 | GND | Ground Pin |
| 8 | Q3 | Outputs from ÷ by 5 section |
| 9 | Q0 | Outputs from ÷ by 2 section |
| 10 | CP0′ | Clock Pulse Input to ÷ by 2 section |
| 11 | CP1′ | Clock Pulse Input to ÷ by 5 section |
| 12 | MR | Master Reset Input |
| 13 | MR | Master Reset Input |
| 14 | Vcc | Chip Supply Voltage |
Applications
The 74LS290 Counter has a wide number of applications. A few of them are listed down below:
- Generally used to count the number of pulses or events that occur in digital circuits.
- Also used to memorize combinational logic events occurring in digital circuits and show the count of events at the output port.
74LS290 Datasheet
You can download the datasheet for 74LS290 4-Bit Binary Ripple Counter IC from the link given below:
See Also: 74LS27 Triple 3-Input NOR Logic Gate IC – Datasheet | 74LS14 Schmitt Trigger Hex Inverter IC – Datasheet | 74LS04 Hex Inverter IC / NOT Gate IC – Datasheet
