MC100ELT21DT

Product Overview

• Category: Integrated Circuit
• Use: Signal Translator
• Characteristics: High-speed, Differential PECL to TTL Translator
• Package: 8-pin SOIC (Small Outline Integrated Circuit)
• Essence: Translates high-speed differential signals from PECL (Positive Emitter-Coupled Logic) to TTL (Transistor-Transistor Logic) levels.
• Packaging/Quantity: Available in reels of 2500 units.

Specifications

• Supply Voltage: +3.0V to +5.5V
• Input Voltage Range: -2.0V to +7.0V
• Output Voltage Range: 0V to Vcc
• Propagation Delay: 1.6ns (typical)
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The MC100ELT21DT has the following pin configuration:

```

---

| | --| VCC GND |-- Pin 1: Power Supply (+3.0V to +5.5V) --| /EN Qn |-- Pin 2: Output (TTL) --| A B |-- Pins 3 and 4: Differential PECL Inputs --| /Q Q |-- Pins 5 and 6: Complementary TTL Outputs --| /Qn Qn |-- Pins 7 and 8: Complementary TTL Outputs |___________| ```

Functional Features

• Translates high-speed differential signals from PECL to TTL levels.
• Provides a single-ended TTL output compatible with standard TTL logic families.
• Offers a complementary TTL output for each input.
• Operates at high speeds with low propagation delay.
• Supports a wide supply voltage range for flexibility in various applications.

Advantages and Disadvantages

Advantages

• High-speed translation of differential signals.
• Wide supply voltage range allows compatibility with different systems.
• Complementary TTL outputs provide flexibility in signal routing.

Disadvantages

• Limited to translating signals between PECL and TTL levels only.
• Requires external components for proper biasing and termination.

Working Principles

The MC100ELT21DT utilizes internal circuitry to convert high-speed differential signals from PECL format to TTL levels. The input differential signals are received on pins A and B, while the complementary TTL outputs are available on pins Q, /Q, Qn, and /Qn. The translation process is achieved through a combination of amplification, level shifting, and logic conversion techniques.

Application Field Plans

The MC100ELT21DT finds application in various fields where translation between PECL and TTL signal levels is required. Some potential application areas include:

1. Telecommunications: Signal translation between PECL-based communication systems and TTL-based devices.
2. Data Communication: Interfacing between high-speed data transmission systems and TTL logic circuits.
3. Industrial Automation: Integration of PECL-based sensors or actuators with TTL-based control systems.
4. Test and Measurement: Conversion of differential signals for compatibility with standard TTL test equipment.

Alternative Models

For users seeking alternative options, the following models can be considered:

1. MC100ELT22DT: Similar to MC100ELT21DT but with inverted TTL outputs.
2. MC100ELT20DT: Differential PECL to CMOS translator with complementary CMOS outputs.
3. MC100ELT23DT: Differential PECL to ECL translator with complementary ECL outputs.

These alternatives offer similar functionality with slight variations in output types or additional features.

In conclusion, the MC100ELT21DT is a high-speed signal translator integrated circuit that converts differential PECL signals to TTL levels. It provides a reliable and efficient solution for interfacing between different logic families. With its wide supply voltage range and complementary TTL outputs, it offers flexibility in various applications across multiple industries.