Overview
The MC74HC245ADTR2G, 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. The inputs are compatible with standard CMOS outputs, and with the use of external pull-up resistors, they can also be compatible with LSTTL outputs. The device 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 the two buses.
Key Specifications
| Parameter | Min | Max | Unit |
|---|---|---|---|
| DC Supply Voltage (VCC) | 2.0 | 6.0 | V |
| DC Input Voltage (VIN) | -0.5 | VCC + 0.5 | V |
| DC Output Voltage (VOUT) | -0.5 | VCC + 0.5 | V |
| Operating Free-Air Temperature (TA) | -55 | 125 | °C |
| Input Rise or Fall Time (tr, tf) | 0 | 1000 (VCC=2.0V), 500 (VCC=4.5V), 400 (VCC=6.0V) | ns |
| Maximum High-Level Input Voltage (VIH) | 1.5 (VCC=2.0V), 2.1 (VCC=3.0V), 3.15 (VCC=4.5V), 4.2 (VCC=6.0V) | V | |
| Maximum Low-Level Input Voltage (VIL) | 0.5 (VCC=2.0V), 0.9 (VCC=3.0V), 1.35 (VCC=4.5V), 1.8 (VCC=6.0V) | V | |
| Minimum High-Level Output Voltage (VOH) | 1.9 (VCC=2.0V), 4.4 (VCC=4.5V), 5.9 (VCC=6.0V) | V | |
| Maximum Low-Level Output Voltage (VOL) | 0.1 | V | |
| Maximum Input Leakage Current (Iin) | ±1.0 | µA | |
| Maximum Three-State Leakage Current (IOZ) | ±10 | µA | |
| Maximum Quiescent Supply Current (ICC) | 160 | µA |
Key Features
- Output Drive Capability: 15 LSTTL Loads
- Outputs Directly Interface to CMOS, NMOS, and TTL
- Operating Voltage Range: 2.0 to 6.0 V
- Low Input Current: 1 µA
- High Noise Immunity Characteristic of CMOS Devices
- In Compliance with the Requirements Defined by JEDEC Standard No. 7A
- Chip Complexity: 308 FETs or 77 Equivalent Gates
- Pb-Free Packages are Available
- AEC-Q100 Qualified and PPAP Capable for Automotive and Other Applications
Applications
The MC74HC245ADTR2G is suitable for various applications requiring 2-way asynchronous communication between data buses. It is particularly useful in systems that need to interface different logic families such as CMOS, NMOS, and TTL. Common applications include:
- Data Bus Transceivers in Microprocessor Systems
- Level Conversion between Different Logic Families
- High-Speed Data Transmission Systems
- Automotive and Industrial Control Systems
Q & A
- What is the operating voltage range of the MC74HC245ADTR2G?
The operating voltage range is from 2.0 to 6.0 V.
- How many LSTTL loads can the outputs of the MC74HC245ADTR2G drive?
The outputs can drive up to 15 LSTTL loads.
- What is the maximum input leakage current of the MC74HC245ADTR2G?
The maximum input leakage current is ±1.0 µA.
- Is the MC74HC245ADTR2G compatible with different logic families?
Yes, it is compatible with CMOS, NMOS, and TTL logic families.
- What is the purpose of the Output Enable pin in the MC74HC245ADTR2G?
The Output Enable pin is used to place the I/O ports into high-impedance states.
- What determines the direction of data flow in the MC74HC245ADTR2G?
The Direction control determines whether data flows from Bus A to Bus B or from Bus B to Bus A.
- Is the MC74HC245ADTR2G AEC-Q100 qualified?
Yes, it is AEC-Q100 qualified and PPAP capable for automotive and other applications.
- What is the storage temperature range for the MC74HC245ADTR2G?
The storage temperature range is from -65°C to +150°C.
- What is the maximum quiescent supply current of the MC74HC245ADTR2G?
The maximum quiescent supply current is 160 µA.
- What package types are available for the MC74HC245ADTR2G?
The device is available in TSSOP-20 packages, with options for reel and tape packaging.
