Overview
The SN74AVC32T245ZKER is a 32-bit dual-supply bus transceiver produced by Texas Instruments. This device is part of the Widebus+™ family and is designed for universal low-voltage bidirectional translation between various voltage nodes, including 1.2 V, 1.5 V, 1.8 V, 2.5 V, and 3.3 V. It operates with two separate, configurable power-supply rails (VCCA and VCCB) and is optimized for asynchronous communication between data buses. The device features control inputs referenced to VCCA, allowing for flexible voltage translation and isolation of the buses through output-enable (OE) inputs.
Key Specifications
| Parameter | Min | Max | Unit |
|---|---|---|---|
| Supply Voltage (VCCA, VCCB) | -0.5 | 4.6 | V |
| Input Voltage (I/O ports) | -0.5 | 4.6 | V |
| Output Voltage (High or Low State) | -0.5 | VCCA + 0.5 / VCCB + 0.5 | V |
| Continuous Output Current | -50 | 50 | mA |
| Operating Free-Air Temperature | -40 | 85 | °C |
| Junction-to-Ambient Thermal Resistance (RθJA) | 70.7 | - | °C/W (LFBGA) |
| High-Level Output Current (IOH) at VCCA = 3.3 V | -12 | - | mA |
| Low-Level Output Current (IOL) at VCCA = 3.3 V | 12 | - | mA |
Key Features
- Member of the Texas Instruments Widebus+™ family.
- Universal low-voltage bidirectional translation between 1.2 V, 1.5 V, 1.8 V, 2.5 V, and 3.3 V voltage nodes.
- Control inputs referenced to VCCA voltage.
- Output-enable (OE) inputs to disable outputs and isolate buses.
- ESD protection: 4000 V Human-Body Model (A114-A) and 1000 V Charged-Device Model (C101).
- Full specification for partial-power-down applications using Ioff circuitry.
- VCC isolation feature to ensure high-impedance state during power-up or power-down.
Applications
- Personal Electronics
- Industrial
- Enterprise
- Telecom
Q & A
- What is the primary function of the SN74AVC32T245ZKER?
The primary function is to provide universal low-voltage bidirectional translation between different voltage nodes.
- What are the supported voltage ranges for VCCA and VCCB?
VCCA and VCCB can operate from 1.2 V to 3.6 V.
- How does the device handle power-down scenarios?
The device features Ioff circuitry to disable outputs and prevent damaging current backflow during power-down.
- What is the purpose of the output-enable (OE) inputs?
The OE inputs can disable the outputs, effectively isolating the buses.
- What are the thermal characteristics of the LFBGA package?
The junction-to-ambient thermal resistance (RθJA) for the LFBGA package is 70.7 °C/W.
- What is the maximum continuous output current?
The maximum continuous output current is ±50 mA.
- What are the ESD protection ratings for this device?
The device has ESD protection ratings of 4000 V Human-Body Model (A114-A) and 1000 V Charged-Device Model (C101).
- What is the operating temperature range for this device?
The operating free-air temperature range is from -40°C to 85°C.
- How does the VCC isolation feature work?
The VCC isolation feature ensures that if either VCC input is at GND, both ports are in the high-impedance state.
- What are some common applications for the SN74AVC32T245ZKER?
Common applications include personal electronics, industrial, enterprise, and telecom sectors.
