The 74LS122 IC has a wide range of working voltage, a wide range of working conditions, and directly interfaces with CMOS, NMOS, and TTL. The output of the IC always comes in TTL which makes it easy to work with other TTL devices and microcontrollers. The 74LS122 has an internal timing resistor that allows the circuits to be used with only an external capacitor. Once triggered, the basic pulse width may be extended by retriggering the gated low-level-active (A) or high-level-active (B) inputs or be reduced by the use of the overriding clear.
What is a Monostable Multivibrator?
A monostable multivibrator (MMV), often called a one-shot multivibrator, is a pulse generator circuit in which the duration of the pulse is determined by the R-C network, connected externally to the 555 timers. In such a vibrator, one state of output is stable while the other is quasi-stable (unstable). For auto-triggering of output from a quasi-stable state to a stable state, energy is stored by an externally connected capacitor to a reference level. The time taken in storage determines the pulse width.
74LS122 Pinout
74LS122 Pin Configuration
| Pin No | Pin Name | Description |
|---|---|---|
| 1 | A1′ | Active low input A1 |
| 2 | A2′ | Active low input A1 |
| 3 | B1 | input pin B1 |
| 4 | B2 | input pin B2 |
| 5 | CLR’ | Active low Clear pin |
| 6 | Q’ | Active low Output pin |
| 7 | GND | Ground |
| 8 | Q | Active high Output pin |
| 9 | Rint | Pin to connect Rint resistance |
| 10 | NC | Not Used |
| 11 | Cext | Pin to connect Cext capacitance |
| 12 | NC | Not Used |
| 13 | Rext/Cext | Pin to connect Rext/Cext resistance/capacitance |
| 14 | Vcc | Chip Supply Voltage |
74LS122 Features & Specifications
- Logic Family / Base Number: TTL122
- Multivibrator Type: Monostable
- Output Current: 16mA
- Supply Voltage Min: 4.75V
- Supply Voltage Max: 5.25V
- Logic Case Style: DIP
- No. of Pins: 14 Pins
- Propagation Delay: 45ns
- Logic IC Family: TTL
- Logic IC Base Number: 74121
- Operating Temperature Min: 0°C
- Operating Temperature Max: 70°C
Applications
- Its is commonly used in delay & timing circuits.
- It is also used for temporary memories.
You can download this Datasheet for 74LS122 Retrigger able Monostable Multivibrator from the link given below:
See Also: 74LS20 Dual 4 – Input NAND IC | 74LS02 Quad Two Input NOR Gate| 7407 Hex Buffer IC
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