LM556CMX

Product Overview

• Category: Integrated Circuit (IC)
• Use: Timer and oscillator applications
• Characteristics: Dual precision timer with independent control circuits, low power consumption, wide operating voltage range
• Package: Ceramic DIP (Dual In-line Package)
• Essence: The LM556CMX is a dual version of the popular LM555 timer IC. It combines two individual timers in a single package, providing flexibility and convenience for various timing and oscillator applications.
• Packaging/Quantity: Available in tubes or reels, with 25 units per tube/reel.

Specifications

• Supply Voltage Range: 4.5V to 16V
• Operating Temperature Range: -40°C to +85°C
• Timing Capacitance Range: 100pF to 100μF
• Timing Resistance Range: 1kΩ to 100MΩ
• Output Current: 200mA
• Trigger Voltage: 1/3 Vcc
• Reset Voltage: 0.7V
• Threshold Voltage: 2/3 Vcc
• Power Dissipation: 600mW

Pin Configuration

The LM556CMX has a total of 14 pins, which are assigned as follows:

1. GND (Ground)
2. TRIG A (Trigger Input A)
3. OUT A (Output A)
4. RESET A (Reset Input A)
5. CTRL A (Control Voltage A)
6. THRES A (Threshold Input A)
7. DISCH A (Discharge Output A)
8. VCC (Positive Supply Voltage)
9. DISCH B (Discharge Output B)
10. THRES B (Threshold Input B)
11. CTRL B (Control Voltage B)
12. RESET B (Reset Input B)
13. OUT B (Output B)
14. TRIG B (Trigger Input B)

Functional Features

• Dual independent timers with separate control circuits
• Wide timing range and high accuracy
• Low power consumption, suitable for battery-powered applications
• Adjustable duty cycle for pulse generation
• Monostable or astable operation modes
• Output can source or sink current

Advantages

• Compact and convenient dual timer solution
• Versatile and flexible in various timing applications
• Wide operating voltage range allows compatibility with different power sources
• High accuracy and stability in timing functions
• Low power consumption extends battery life

Disadvantages

• Limited output current capacity (200mA)
• Requires external components for precise timing configurations
• Not suitable for high-frequency applications

Working Principles

The LM556CMX operates based on the principles of an astable or monostable multivibrator. It consists of two individual timers, each capable of generating precise time delays or oscillations. The timing is determined by external resistors and capacitors connected to the respective control pins.

In astable mode, the IC continuously alternates between high and low states, producing a square wave output. In monostable mode, the IC triggers a single pulse of a specific duration upon receiving a trigger signal.

Application Field Plans

The LM556CMX finds applications in various fields, including:

1. Timing circuits in electronic devices
2. Pulse width modulation (PWM) generation
3. Frequency division and multiplication
4. Precision timing for industrial automation
5. Oscillator circuits for audio and video equipment
6. LED flashers and sequencers
7. Delay circuits for automotive electronics
8. Robotics and control systems

Alternative Models

Other alternative models that provide similar functionality to the LM556CMX include:

1. NE556
2. ICM7556
3. TLC556
4. MC14536B
5. CD556

These models offer dual timer functionality and can be used as substitutes for the LM556CMX in various applications.

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