Overview
The 74AVCH4T245PWTG4, produced by Texas Instruments, is a 4-bit dual-supply bus transceiver designed for bidirectional level translation and voltage translation between different voltage nodes. This device is part of the AVC logic family and is optimized for universal low-voltage translation, making it suitable for a wide range of applications in modern electronic systems.
The transceiver features configurable power-supply rails, allowing each port to operate over the full 1.2V to 3.6V power-supply range. This flexibility enables seamless communication between two data buses operating at different voltage levels.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| VCCA/VCCB Supply Voltage | 1.2 | 3.6 | V | ||
| VIH High-level Input Voltage | VCCA = 1.2 V to 1.95 V | 0.65VCCA | V | ||
| VIH High-level Input Voltage | VCCA = 1.95 V to 2.7 V | 1.6 | V | ||
| VIH High-level Input Voltage | VCCA = 2.7 V to 3.6 V | 2 | V | ||
| VOH High-level Output Voltage | IO = -1.5 mA; VCC(A) = VCC(B) = 0.8 V to 3.6 V | 0.69VCC(A) | V | ||
| VOL Low-level Output Voltage | IO = 1.5 mA; VCC(A) = VCC(B) = 0.8 V to 3.6 V | 0.07VCC(A) | V | ||
| tPLH/tPHL Propagation Delay | VCCB = 1.2 V to 3.3 V | 0.1 | 3.6 | 6.5 | ns |
| tPZH/tPZL Output Enable Time | VCCB = 1.2 V to 3.3 V | 0.4 | 5.2 | 10.2 | ns |
Key Features
- Fully configurable dual-rail design allowing each port to operate over the full 1.2V to 3.6V power-supply range.
- Bidirectional level translation between any of the low voltage nodes (1.2V, 1.5V, 1.8V, 2.5V, and 3.3V).
- 3-state outputs to control data flow and prevent backflow current during power-down.
- Direction control input (DIR) and output enable input (OE) for flexible data transmission and output control.
- Support for partial-power-down applications using Ioff circuitry.
- VCC isolation feature to ensure high-impedance state during power-up or power-down.
Applications
- Asynchronous communication between two data buses operating at different voltage levels.
- Level translation in mixed-voltage systems, such as in embedded systems, microcontrollers, and FPGA interfaces.
- Power management and voltage translation in battery-powered devices and mobile electronics.
- Industrial control systems requiring flexible voltage translation and data communication.
- Automotive electronics where different voltage domains need to communicate efficiently.
Q & A
- What is the voltage range for the VCCA and VCCB supplies of the 74AVCH4T245PWTG4?
The VCCA and VCCB supplies can operate over the full 1.2V to 3.6V power-supply range.
- What is the purpose of the DIR and OE inputs in the 74AVCH4T245PWTG4?
The DIR input controls the direction of data transmission, while the OE input enables or disables the outputs, placing them in a high-impedance state if necessary.
- Can the 74AVCH4T245PWTG4 be used in partial-power-down applications?
- What are the typical propagation delays for the 74AVCH4T245PWTG4?
- How does the VCC isolation feature work in the 74AVCH4T245PWTG4?
- What are the thermal characteristics of the 74AVCH4T245PWTG4?
- Can the 74AVCH4T245PWTG4 be used in high-temperature environments?
- What are the package options available for the 74AVCH4T245PWTG4?
- How does the 74AVCH4T245PWTG4 handle input leakage current?
- What is the significance of the Ioff circuitry in the 74AVCH4T245PWTG4?
