Overview
The MC74LCX245DTR2 is a high-performance, non-inverting octal transceiver produced by onsemi. This component operates from a supply voltage range of 1.65 to 5.5 volts, making it versatile for various low-voltage applications. It features high impedance TTL-compatible inputs and outputs, which significantly reduce current loading on input drivers and improve switching noise performance. The device is suitable for memory address driving and all TTL-level bus-oriented transceiver applications.
Key Specifications
| Parameter | Min | Max | Unit | |
|---|---|---|---|---|
| VCC (Supply Voltage) | 1.65 | 2.5, 3.3 | 5.5 | V |
| VI (Digital Input Voltage) | 0 | 5.5 | V | |
| VO (Output Voltage) | 0 | VCC | V | |
| TA (Operating Free-Air Temperature) | -55 | 125 | °C | |
| ICC (Quiescent Supply Current) | 10 | μA | ||
| tPLH, tPHL (Propagation Delay, D to O) | 10.3 | ns |
Key Features
- High performance, non-inverting octal transceiver.
- Operates from a 1.65 to 5.5 V supply voltage.
- High impedance TTL-compatible inputs and outputs.
- 5 V-tolerant inputs and outputs.
- Current drive capability of 24 mA at both A and B ports at VCC = 3.0 V.
- Transmit/Receive (T/R) input determines the direction of data flow.
- Output Enable (OE) input for controlling output states.
- Tri-state outputs for bus-oriented applications.
Applications
- Memory address driving.
- TTL-level bus-oriented transceiver applications.
- Low-voltage CMOS logic circuits.
- General-purpose data transmission and reception in digital systems.
Q & A
- What is the operating voltage range of the MC74LCX245DTR2?
The MC74LCX245DTR2 operates from a supply voltage range of 1.65 to 5.5 volts.
- What are the key features of the MC74LCX245DTR2?
Key features include high impedance TTL-compatible inputs and outputs, 5 V-tolerant inputs and outputs, and a current drive capability of 24 mA at both A and B ports at VCC = 3.0 V.
- How does the Transmit/Receive (T/R) input function?
The Transmit/Receive (T/R) input determines the direction of data flow through the bi-directional transceiver. Transmit (active-HIGH) enables data from A ports to B ports, while Receive (active-LOW) enables data from B ports to A ports.
- What is the purpose of the Output Enable (OE) input?
The Output Enable (OE) input controls the output states, allowing the outputs to be in a high impedance state when OE is HIGH.
- What are the typical applications of the MC74LCX245DTR2?
Typical applications include memory address driving, TTL-level bus-oriented transceiver applications, and general-purpose data transmission and reception in digital systems.
- What is the maximum propagation delay of the MC74LCX245DTR2?
The maximum propagation delay (tPLH, tPHL) is 10.3 ns.
- What is the operating temperature range of the MC74LCX245DTR2?
The operating temperature range is from -55°C to +125°C.
- What is the quiescent supply current of the MC74LCX245DTR2?
The quiescent supply current (ICC) is typically 10 μA.
- Is the MC74LCX245DTR2 suitable for 5 V systems?
Yes, the MC74LCX245DTR2 has 5 V-tolerant inputs and outputs, allowing it to be safely driven from 5 V devices if VCC is less than 5.0 V.
- What are the available package options for the MC74LCX245DTR2?
The MC74LCX245DTR2 is available in SOIC-20 WB and TSSOP-20 packages.
