Overview
The 74HC245DTR2G is an octal 3-state noninverting bus transceiver produced by onsemi. This high-performance silicon-gate CMOS device is designed for 2-way asynchronous communication between data buses. It is identical in pinout to the LS245 and features TTL-compatible inputs and outputs that can directly interface with CMOS, NMOS, and TTL devices. The device includes an active-low Output Enable pin and a Direction control pin to manage data flow between the two buses.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Operating Voltage Range | 2.0 to 6.0 | V |
| DC Supply Voltage (VCC) | 0.5 to 7.0 | V |
| DC Input Voltage (VIN) | 0.5 to VCC + 0.5 | V |
| DC Output Voltage (VOUT) | 0.5 to VCC + 0.5 | V |
| Operating Temperature | -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 to 5.4 | V |
| Low Input Current | 1.0 | μA |
| ESD Performance (HBM) | 2000 | V |
| ESD Performance (Machine Model) | 200 | V |
| Chip Complexity | 308 FETs or 77 Equivalent Gates | |
| Package Type | TSSOP-20 |
Key Features
- Output Drive Capability: 15 LSTTL Loads
- TTL/NMOS-Compatible Input Levels
- 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
- ESD Performance: HBM ≥ 2000 V; Machine Model ≥ 200 V
- Pb-Free Device
Applications
The 74HC245DTR2G is suitable for various applications requiring 2-way asynchronous communication between data buses. These include:
- Data transmission and reception in digital systems
- Bus interfacing and isolation in microprocessor and microcontroller systems
- Peripheral device communication
- Embedded systems requiring high-speed data transfer
Q & A
- What is the operating voltage range of the 74HC245DTR2G?
The operating voltage range is from 2.0 to 6.0 volts.
- What is the maximum low-level input voltage (VIL) for the 74HC245DTR2G?
The maximum low-level input voltage (VIL) is 0.8 volts.
- What is the ESD performance of the 74HC245DTR2G?
The ESD performance is HBM ≥ 2000 V and Machine Model ≥ 200 V.
- What is the package type of the 74HC245DTR2G?
The package type is TSSOP-20.
- Is the 74HC245DTR2G Pb-free?
- What is the chip complexity of the 74HC245DTR2G?
The chip complexity is 308 FETs or 77 equivalent gates.
- What are the key features of the 74HC245DTR2G?
The key features include TTL/NMOS-compatible input levels, outputs that directly interface with CMOS, NMOS, and TTL, low input current, high noise immunity, and compliance with JEDEC Standard No. 7A.
- What are typical applications for the 74HC245DTR2G?
Typical applications include data transmission and reception in digital systems, bus interfacing and isolation in microprocessor and microcontroller systems, peripheral device communication, and embedded systems requiring high-speed data transfer.
- How does the Direction control pin function in the 74HC245DTR2G?
The Direction control pin determines whether data flows from Bus A to Bus B or from Bus B to Bus A.
- What is the function of the Output Enable pin in the 74HC245DTR2G?
The Output Enable pin, when active-low, places the I/O ports into high-impedance states.
