74HC123PW

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74HC123PW

Monostable Multivibrator

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  • Mfr. Partie #74HC123PW
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Vue d'ensemble

Description

The 74HC123PW is a dual retriggerable monostable multivibrator integrated circuit (IC) that belongs to the 74HC family of high-speed CMOS logic devices. It is primarily used for generating precise time delays in response to triggering inputs, making it suitable for applications such as pulse width modulation, timers, and event counters.
Key features of the 74HC123PW include two independent monostable circuits, flexible timing with external resistor-capacitor (RC) components, and the capability to retrigger the output pulse. The output pulse width can be adjusted from microseconds to several minutes, depending on the RC values chosen.
The device operates over a wide voltage range (2V to 6V), ensuring compatibility with various logic levels. It has a low power consumption characteristic and high noise immunity. The 74HC123PW is available in a 16-pin TSSOP package, making it suitable for compact designs. Overall, it is a versatile component widely used in digital electronics for timing applications.

Features

The 74HC123PW is a dual retriggerable monostable multivibrator. Key features include:
1. Dual Functionality: It can operate as two independent monostable circuits.
2. Wide Voltage Range: Operates with a supply voltage of 2V to 6V.
3. Fast Switching: Capable of output transitions in less than 20 ns at 5V.
4. Retriggerable: Allows the timing interval to be extended by triggering during the output pulse.
5. Adjustable Pulse Width: Pulse width is determined by external resistors and capacitors.
6. Low Power Consumption: Designed for high-speed performance with low power requirements.
7. TTL Compatibility: Compatible with TTL and CMOS logic families.
8. Temperature Range: Operates within a wide temperature range, typically from -40°C to 125°C.
9. Output Drive Capability: Capable of driving TTL loads directly.
These features make the 74HC123PW suitable for timing applications, pulse generation, and signal conditioning in various electronic circuits.

Package

The 74HC123PW is packaged in a TSSOP (Thin Shrink Small Outline Package) format, specifically with 16 pins. This type of package is compact and suitable for surface mounting on PCBs.

Pinout

The 74HC123PW is a dual retriggerable monostable multivibrator with a pin count of 16. Its primary functions include generating precise time delays and pulse-width modulation.
Pin Configuration:
1. GND (Pin 1): Ground reference.
2. A (Pin 2): Trigger input for the first monostable.
3. Q (Pin 3): Output of the first monostable.
4. \(\overline{Q}\) (Pin 4): Inverted output of the first monostable.
5. B (Pin 5): Trigger input for the second monostable.
6. Q2 (Pin 6): Output of the second monostable.
7. \(\overline{Q2}\) (Pin 7): Inverted output of the second monostable.
8. C (Pin 8): Common connection for both monostables.
9. VCC (Pin 9): Power supply.
10. R1 (Pin 10): External resistor for timing adjustment.
11. R2 (Pin 11): External resistor for the second timing adjustment.
12. C1 (Pin 12): External capacitor for timing control.
13. C2 (Pin 13): External capacitor for the second timing control.
14-16: NC (Pins 14-16): Not connected.
This device is widely used in timing applications for its versatility and stability.

Manufacturer

The manufacturer of the 74HC123PW is Texas Instruments (TI). Texas Instruments is a global semiconductor company known for designing and manufacturing a wide range of analog and embedded processing chips. Established in 1930, the company is headquartered in Dallas, Texas, and serves various industries, including automotive, industrial, communications, and consumer electronics. TI is recognized for its innovation in integrated circuits and has a strong emphasis on research and development. The 74HC123 is a dual retriggerable monostable multivibrator, part of the 74HC series of high-speed CMOS logic devices, commonly used in timing applications and pulse generation.

Application

The 74HC123PW is a dual retriggerable monostable multivibrator used in various applications, including pulse width modulation, timing circuits, and frequency dividers. It is commonly found in timer and delay circuits, waveform generation, and event counting. Its ability to generate precise timing intervals makes it suitable for applications in automotive electronics, consumer electronics, and industrial control systems.

Equivalent

Equivalent products to the 74HC123PW include the 74HCT123 (for TTL compatibility), 74LS123 (for low-power), and the 74AC123 (for higher speed). Additionally, similar devices like TI's 74LVC123A or Nexperia's 74HC123 can also serve as alternatives, depending on specific application requirements such as voltage levels and speed.

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