Overview
The MC74HCT245ADWR2G, produced by onsemi, is a high-performance Silicon-Gate CMOS octal 3-state noninverting bus transceiver. This device is identical in pinout to the LS245 and is designed for 2-way asynchronous communication between data buses. It features an active-low Output Enable pin that places the I/O ports into high-impedance states, and a Direction control that determines the direction of data flow between buses A and B. The MC74HCT245A can also serve as a level converter for interfacing TTL or NMOS outputs to high-speed CMOS inputs.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| DC Supply Voltage (VCC) | 4.5 to 5.5 | V |
| DC Input Voltage (VIN) | -0.5 to VCC+0.5 | V |
| DC Output Voltage (VOUT) | -0.5 to VCC+0.5 | V |
| Operating Free-Air Temperature | -55 to +125 | °C |
| Input Rise or Fall Time | 0 to 500 ns | ns |
| Minimum High-Level Input Voltage (VIH) | 2.4 V | V |
| Maximum Low-Level Input Voltage (VIL) | 0.9 V | V |
| Minimum High-Level Output Voltage (VOH) | 3.98 V (at VCC=5V, Iout=2.4mA) | V |
| Maximum Low-Level Output Voltage (VOL) | 0.26 V (at VCC=5V, Iout=2.4mA) | V |
| Maximum Input Leakage Current | ±1.0 µA | µA |
| Maximum Three-State Leakage Current | ±10 µA | µA |
| Maximum Quiescent Supply Current | 40 µA (at VCC=5V) | µA |
Key Features
- Output Drive Capability: 15 LSTTL Loads
- Outputs Directly Interface to CMOS, NMOS, and TTL
- Low Input Current: 1.0 µA
- High Noise Immunity Characteristic of CMOS Devices
- In Compliance with the Requirements Defined by JEDEC Standard No. 7A
- Chip Complexity: 304 FETs or 76 Equivalent Gates
- Pb-Free, Halogen-Free, and RoHS Compliant Packages
- AEC-Q100 Qualified and PPAP Capable for Automotive and Other Applications
Applications
The MC74HCT245ADWR2G is suitable for various applications requiring 2-way asynchronous communication between data buses, including:
- Level conversion between TTL/NMOS and CMOS systems
- Data bus isolation and switching
- High-speed data transfer in digital systems
- Automotive and industrial control systems
- Embedded systems and microcontrollers
Q & A
- What is the primary function of the MC74HCT245ADWR2G?
The MC74HCT245ADWR2G is a 3-state noninverting bus transceiver used for 2-way asynchronous communication between data buses.
- What is the operating voltage range of the MC74HCT245ADWR2G?
The operating voltage range is 4.5 to 5.5 V.
- Can the MC74HCT245ADWR2G interface with TTL and NMOS outputs?
- What is the maximum input leakage current of the MC74HCT245ADWR2G?
The maximum input leakage current is ±1.0 µA.
- Is the MC74HCT245ADWR2G RoHS compliant?
- What is the chip complexity of the MC74HCT245ADWR2G?
The chip complexity is 304 FETs or 76 equivalent gates.
- Can the MC74HCT245ADWR2G be used in automotive applications?
- How does the Direction control work on the MC74HCT245ADWR2G?
The Direction control determines whether data flows from Bus A to Bus B or from Bus B to Bus A.
- What is the purpose of the active-low Output Enable pin?
The active-low Output Enable pin places the I/O ports into high-impedance states.
- What is the maximum quiescent supply current of the MC74HCT245ADWR2G?
The maximum quiescent supply current is 40 µA at VCC=5V.
