CD74HC4538PWT

Product Overview

• Category: Integrated Circuit
• Use: Multivibrator and Timer
• Characteristics: High-Speed CMOS Logic, Dual Monostable Multivibrator
• Package: TSSOP (Thin Shrink Small Outline Package)
• Essence: The CD74HC4538PWT is a dual monostable multivibrator that can be used as a timer or pulse generator.
• Packaging/Quantity: Tape and Reel, 2500 pieces per reel

Specifications

• Supply Voltage: 2V to 6V
• Operating Temperature Range: -40°C to +85°C
• Propagation Delay Time: 15 ns
• Output Current: ±5.2 mA
• Number of Pins: 16

Detailed Pin Configuration

1. Pin 1: Output B
2. Pin 2: Input A
3. Pin 3: Ground
4. Pin 4: Reset B
5. Pin 5: Trigger B
6. Pin 6: Threshold B
7. Pin 7: Control Voltage B
8. Pin 8: VCC
9. Pin 9: Control Voltage A
10. Pin 10: Threshold A
11. Pin 11: Trigger A
12. Pin 12: Reset A
13. Pin 13: Ground
14. Pin 14: Input B
15. Pin 15: Output A
16. Pin 16: Control Voltage Common

Functional Features

• Dual monostable multivibrator with independent trigger and reset inputs
• Wide operating voltage range
• High-speed operation
• Low power consumption
• Schmitt-trigger inputs for noise immunity
• Can be used in various timing applications

Advantages and Disadvantages

Advantages: - Dual monostable multivibrator allows for independent timing control - Wide operating voltage range enables flexibility in different applications - High-speed operation ensures accurate timing - Low power consumption for energy-efficient designs - Schmitt-trigger inputs provide noise immunity

Disadvantages: - Limited number of timing options compared to more complex timer ICs - Not suitable for applications requiring precise timing beyond its specified limits

Working Principles

The CD74HC4538PWT operates as a dual monostable multivibrator. It can be triggered by a positive or negative edge on the trigger input (pin 2 or pin 11). Once triggered, the output changes state and remains in that state for a duration determined by the external timing components connected to the threshold input (pin 10 or pin 6) and control voltage input (pin 9 or pin 7).

The reset input (pin 4 or pin 12) can be used to prematurely terminate the timing cycle and return the output to its initial state. The control voltage common (pin 16) is connected to the reference voltage for both control voltage inputs.

Detailed Application Field Plans

The CD74HC4538PWT can be used in various applications that require timing control or pulse generation. Some potential application fields include:

1. Timing circuits in electronic devices
2. Pulse width modulation (PWM) generation
3. Frequency division and counting circuits
4. Delay circuits in communication systems
5. Sequential logic circuits
6. Industrial automation and control systems

Detailed and Complete Alternative Models

1. MC14538B: Dual Precision Monostable Multivibrator
2. HEF4538BP: Dual Precision Monostable Multivibrator
3. SN74HC4538N: Dual Monostable Multivibrator with Schmitt-Trigger Inputs

These alternative models offer similar functionality and can be used as substitutes for the CD74HC4538PWT in various applications.

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