CD74HC4538PW

Product Overview

• Category: Integrated Circuit (IC)
• Use: Multivibrator
• Characteristics: High-speed, CMOS logic, dual retriggerable precision monostable multivibrator
• Package: TSSOP (Thin Shrink Small Outline Package)
• Essence: Precision timing control
• Packaging/Quantity: Tape and Reel, 2500 pieces per reel

Specifications

• Supply Voltage Range: 2V to 6V
• High-Level Input Voltage: 2V to VCC
• Low-Level Input Voltage: GND to 0.8V
• High-Level Output Current: -4mA
• Low-Level Output Current: 4mA
• Propagation Delay Time: 25ns
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The CD74HC4538PW has a total of 16 pins. The pin configuration is as follows:

1. MR (Master Reset)
2. CP1 (Control Pin 1)
3. CP2 (Control Pin 2)
4. Q1 (Output 1)
5. Q2 (Output 2)
6. GND (Ground)
7. Q3 (Output 3)
8. Q4 (Output 4)
9. VCC (Supply Voltage)
10. RC (Resistor/Capacitor)
11. REXT (External Resistor)
12. CEXT (External Capacitor)
13. NC (No Connection)
14. NC (No Connection)
15. NC (No Connection)
16. NC (No Connection)

Functional Features

• Dual retriggerable monostable multivibrator with precision timing control.
• Provides accurate pulse width generation.
• Can be triggered by positive or negative edges of the input signal.
• Retriggerable feature allows extending the output pulse width.
• Wide supply voltage range and operating temperature range.

Advantages

• High-speed operation due to CMOS logic technology.
• Precision timing control for accurate pulse width generation.
• Retriggerable feature provides flexibility in pulse width adjustment.
• Wide supply voltage range allows compatibility with various systems.
• Compact TSSOP package for space-saving applications.

Disadvantages

• Limited number of output pins (4 outputs).
• Requires external resistors and capacitors for precise timing control.
• Sensitivity to noise and interference due to high-speed operation.

Working Principles

The CD74HC4538PW is a dual retriggerable monostable multivibrator. It generates a single output pulse of a specific width when triggered by an input signal. The pulse width is determined by the values of the external resistor (REXT) and capacitor (CEXT) connected to the RC pin. The multivibrator can be triggered by either positive or negative edges of the input signal, providing flexibility in pulse generation.

The retriggerable feature allows extending the output pulse width if additional trigger signals are received during the pulse period. This feature is useful in applications where precise timing control is required. The IC operates on a wide supply voltage range and can withstand varying environmental conditions within the specified temperature range.

Detailed Application Field Plans

The CD74HC4538PW finds applications in various fields that require precision timing control and accurate pulse width generation. Some of the detailed application field plans include:

1. Timing circuits in digital systems
2. Pulse width modulation (PWM) control
3. Frequency division and multiplication circuits
4. Delay circuits in communication systems
5. Precision timing in industrial automation
6. Time delay circuits in automotive electronics
7. Sequential timing control in lighting systems
8. Pulse shaping and synchronization in audio/video equipment

Detailed and Complete Alternative Models

1. CD74HC4538E: DIP (Dual In-line Package) version of the CD74HC4538PW.
2. MC14538B: Similar dual retriggerable monostable multivibrator IC from a different manufacturer.
3. HEF4538BP: CMOS version of the dual retriggerable monostable multivibrator IC.

These alternative models provide similar functionality and can be used as substitutes for the CD74HC4538PW in various applications.

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