74HC4538PW,118

Basic Information Overview

• Category: Integrated Circuit (IC)
• Use: Multivibrator
• Characteristics: Dual Precision Monostable Multivibrator
• Package: TSSOP-16
• Essence: High-Speed CMOS Logic IC
• Packaging/Quantity: Tape and Reel, 2500 pieces per reel

Specifications

• Supply Voltage Range: 2.0V to 6.0V
• Operating Temperature Range: -40°C to +125°C
• Output Current: ±25mA
• Propagation Delay Time: 15ns at VCC = 4.5V
• Trigger Pulse Width: 20ns to 10s
• Trigger Voltage: 1.5V to VCC - 1.5V

Detailed Pin Configuration

1. GND: Ground
2. nA: Negative Edge Trigger Input A
3. nB: Negative Edge Trigger Input B
4. Rext: External Resistor/Capacitor Connection
5. Cext: External Resistor/Capacitor Connection
6. Qn: Negative Output
7. Qn: Negative Output
8. VCC: Positive Power Supply

Functional Features

• Dual monostable multivibrator with independent trigger inputs
• Negative edge-triggered inputs for precise timing control
• Wide range of trigger pulse width and voltage options
• Stable output pulse duration unaffected by input pulse width variations
• High noise immunity due to Schmitt-trigger inputs
• Low power consumption in standby mode

Advantages

• Precise timing control with dual trigger inputs
• Wide range of trigger pulse width and voltage options
• Stable output pulse duration regardless of input pulse width variations
• High noise immunity ensures reliable operation
• Low power consumption in standby mode helps conserve energy

Disadvantages

• Limited to negative edge-triggered inputs, may not be suitable for all applications requiring positive edge triggering
• Requires external resistor and capacitor connections for operation, which adds complexity to the circuit design

Working Principles

The 74HC4538PW,118 is a dual precision monostable multivibrator IC. It operates by triggering an output pulse of a fixed duration in response to a negative edge trigger input signal. The duration of the output pulse is determined by the external resistor and capacitor connected to the Rext and Cext pins. The IC features two independent trigger inputs (nA and nB) and provides stable output pulse duration regardless of variations in the input pulse width.

Detailed Application Field Plans

The 74HC4538PW,118 can be used in various applications that require precise timing control, such as: 1. Pulse width modulation (PWM) circuits 2. Timing and delay circuits 3. Frequency division circuits 4. Precision timing in digital systems 5. Control signal generation in microcontrollers

Detailed and Complete Alternative Models

Some alternative models to the 74HC4538PW,118 include: 1. CD4538: Dual Precision Monostable Multivibrator IC 2. MC14538: Dual Precision Monostable Multivibrator IC 3. HEF4538: Dual Precision Monostable Multivibrator IC

These alternative models offer similar functionality and can be used as substitutes depending on availability and specific requirements.

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