Overview
The CD74HC123PWR is a high-speed CMOS logic dual retriggerable monostable multivibrator with resets, manufactured by Texas Instruments. This integrated circuit is designed to provide a wide range of output pulse widths and is suitable for various applications requiring precise timing and control. The device operates within a voltage range of 2V to 6V and features balanced propagation delay and transition times, making it a reliable choice for digital circuits.
Key Specifications
| Parameter | Value | Units | Conditions |
|---|---|---|---|
| Operating Voltage (VCC) | 2 to 6 | V | |
| Operating Temperature Range | -55 to 125 | °C | |
| Package Type | TSSOP (PW) | ||
| Number of Pins | 16 | ||
| High Level Input Voltage (VIH) | 1.5 to 6 | V | VCC = 2 to 6V |
| Low Level Input Voltage (VIL) | 0 to 0.8 | V | VCC = 2 to 6V |
| High Level Output Voltage (VOH) | 1.9 to 5.9 | V | VCC = 2 to 6V, CL = 50pF |
| Low Level Output Voltage (VOL) | 0.1 to 0.4 | V | VCC = 2 to 6V, CL = 50pF |
| Input Leakage Current (II) | ±1 | µA | VCC or GND |
| Quiescent Device Current (ICC) | 8 to 160 | µA | VCC = 2 to 6V |
| Trigger Propagation Delay (tPLH) | 60 to 450 | ns | CL = 50pF, VCC = 2 to 6V |
| Output Pulse Width (tW) | 38.7 to 51.8 | µs | RX = 10KΩ, CX = 10nF, VCC = 5V |
Key Features
- Overriding Reset Terminates Output Pulse
- Triggering From the Leading or Trailing Edge
- Q and Q Buffered Outputs
- Separate Resets
- Wide Range of Output-Pulse Widths
- Schmitt Trigger on Both A and B Inputs
- Fanout (Over Temperature Range): 10 LSTTL Loads
- Bus Driver Outputs: 15 LSTTL Loads
- Wide Operating Temperature Range: -55°C to 125°C
- Balanced Propagation Delay and Transition Times
- Significant Power Reduction Compared to LSTTL Logic ICs
- HC Types: 2V to 6V Operation
- HCT Types: 4.5V to 5.5V Operation, Direct LSTTL Input Logic Compatibility
- High Noise Immunity: NIH = 30%, NIL = 30% of VCC at VCC = 5V
Applications
The CD74HC123PWR is versatile and can be used in a variety of digital circuits requiring precise timing and control. Some common applications include:
- Pulse generation and shaping
- Timing circuits in digital systems
- Reset and trigger circuits
- Sequential logic circuits
- Automotive and industrial control systems
- Consumer electronics requiring stable timing signals
Q & A
- What is the operating voltage range of the CD74HC123PWR?
The operating voltage range is 2V to 6V.
- What is the package type of the CD74HC123PWR?
The package type is TSSOP (PW) with 16 pins.
- What is the operating temperature range of the CD74HC123PWR?
The operating temperature range is -55°C to 125°C.
- Can the CD74HC123PWR be triggered from both leading and trailing edges of the input pulse?
- How is the output pulse width controlled in the CD74HC123PWR?
The output pulse width is controlled by an external resistor (RX) and an external capacitor (CX).
- What is the significance of the Schmitt trigger on the inputs of the CD74HC123PWR?
The Schmitt trigger provides high noise immunity and ensures stable triggering even in noisy environments.
- Can the output pulse be extended by retriggering the inputs?
- How is the output pulse terminated in the CD74HC123PWR?
The output pulse can be terminated by a LOW level on the Reset (R) pin.
- What are the fanout capabilities of the CD74HC123PWR?
The device can drive up to 10 LSTTL loads and 15 bus driver loads.
- Is the CD74HC123PWR suitable for use in automotive and industrial applications?
