Overview
The MC74HCT245ADWG is an octal 3-state noninverting bus transceiver produced by onsemi. This device is designed for 2-way asynchronous communication between data buses and is particularly useful for interfacing TTL or NMOS outputs to high-speed CMOS inputs. It features an active-low Output Enable pin and a Direction control pin that determines the direction of data flow between the two buses (A and B). The MC74HCT245ADWG is part of the HCT series, which is compatible with TTL and NMOS logic levels, making it versatile for various digital circuit applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| DC Supply Voltage (VCC) | 4.5 to 5.5 | V |
| Operating Temperature Range | -55 to 125 | °C |
| Input Rise and Fall Time | 0 to 500 | ns |
| Minimum High-Level Input Voltage (VIH) | 2.0 | V |
| Maximum Low-Level Input Voltage (VIL) | 0.8 | V |
| Minimum High-Level Output Voltage (VOH) | 4.4 | 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) | 40 | μA |
| Package Type | SOIC W (20-pin) | |
| Mounting Type | Surface Mount |
Key Features
- Output Drive Capability: 15 LSTTL Loads
- Outputs directly interface to CMOS, NMOS, and TTL
- Operating Voltage Range: 4.5 to 5.5 V
- Low Input Current: 1.0 μA
- High Noise Immunity Characteristic of CMOS Devices
- In Compliance with the Requirements Defined by JEDEC Standard No. 7A
- ESD Performance: HBM ≥ 2000 V; Machine Model ≥ 200 V
- Chip Complexity: 308 FETs or 77 Equivalent Gates
- Pb-Free, Halogen Free, and RoHS Compliant
Applications
The MC74HCT245ADWG is suitable for a variety of applications, including:
- Two-way asynchronous communication between data buses
- Level conversion for interfacing TTL or NMOS outputs to high-speed CMOS inputs
- Digital circuit designs requiring bi-directional data transfer
- Systems needing high noise immunity and low power consumption
Q & A
- What is the primary function of the MC74HCT245ADWG?
The MC74HCT245ADWG is an octal 3-state noninverting bus transceiver designed for 2-way asynchronous communication between data buses.
- What is the operating voltage range of the MC74HCT245ADWG?
The operating voltage range is 4.5 to 5.5 V.
- What types of logic levels does the MC74HCT245ADWG support?
The device supports CMOS, NMOS, and TTL logic levels.
- How does the Direction control pin function?
The Direction control pin determines whether data flows from Bus A to Bus B or from Bus B to Bus A.
- What is the purpose of the Output Enable pin?
The Output Enable pin is used to place the I/O ports into high-impedance states.
- Is the MC74HCT245ADWG Pb-Free and RoHS Compliant?
- What is the maximum input leakage current of the MC74HCT245ADWG?
The maximum input leakage current is ±1.0 μA.
- What is the thermal resistance of the TSSOP package?
The thermal resistance of the TSSOP package is 128 °C/W.
- What is the storage temperature range for the MC74HCT245ADWG?
The storage temperature range is -65 to 150 °C.
- Is the MC74HCT245ADWG suitable for automotive applications?
No, the MC74HCT245ADWG is not specifically marked for automotive applications, though other variants in the series may be AEC-Q100 qualified.
