Overview
The SN74AVCA164245ZQLR is a 16-bit dual-supply bus transceiver produced by Texas Instruments. This device is part of the Texas Instruments Widebus™ family and is designed for asynchronous communication between data buses. It features configurable voltage translation and 3-state outputs, making it versatile for various low-voltage applications. The transceiver allows data transmission between two separate configurable power-supply rails, enabling universal low-voltage bidirectional translation between 1.5-V, 1.8-V, 2.5-V, and 3.3-V voltage nodes.
Key Specifications
| Parameter | Min | Max | Unit |
|---|---|---|---|
| Supply Voltage Range (VCCA, VCCB) | 1.4 | 3.6 | V |
| Input Voltage Range | -0.5 | 4.6 | V |
| Output Voltage Range (High-Impedance State) | -0.5 | VCCA + 0.5 / VCCB + 0.5 | V |
| Continuous Output Current | -50 | 50 | mA |
| Continuous Current through VCCA, VCCB, or GND | -100 | 100 | mA |
| Operating Temperature Range | -40 | 85 | °C |
| Package Thermal Impedance (θJA) | 42 | °C/W (GQL/ZQL package) |
Key Features
- Member of the Texas Instruments Widebus™ family
- Overvoltage-tolerant inputs/outputs for mixed-voltage-mode data communications
- DOC™ circuitry for noise reduction without speed degradation
- Fully configurable dual-rail design allowing each port to operate over the full 1.4-V to 3.6-V power-supply range
- Dynamic drive capability equivalent to standard outputs with IOH and IOL of ±24 mA at 2.5-V VCC
- Latch-up performance exceeds 100 mA per JESD 78, Class II
- ESD protection exceeds JESD 22 (2000-V Human-Body Model, 200-V Machine Model, 1000-V Charged-Device Model)
- Ioff supports partial-power-down mode operation
- Control inputs VIH/VIL levels are referenced to VCCA voltage
- Output-enable (OE) input to disable outputs and isolate buses
Applications
The SN74AVCA164245ZQLR is suitable for various applications requiring asynchronous communication between data buses with different voltage levels. This includes:
- Low-voltage bidirectional translation between 1.5-V, 1.8-V, 2.5-V, and 3.3-V voltage nodes
- Mixed-voltage-mode data communications
- Partial-power-down applications
- Systems requiring noise reduction and high-speed data transmission
- Embedded systems, industrial control systems, and other applications needing versatile bus transceivers
Q & A
- What is the primary function of the SN74AVCA164245ZQLR?
The primary function is to act as a 16-bit dual-supply bus transceiver with configurable voltage translation and 3-state outputs.
- What is the voltage range for VCCA and VCCB?
The voltage range for both VCCA and VCCB is from 1.4 V to 3.6 V.
- What are the key features of the DOC™ circuitry in this device?
The DOC™ circuitry dynamically changes output impedance, resulting in noise reduction without speed degradation.
- How does the Ioff feature support partial-power-down mode?
The Ioff circuitry disables the outputs, preventing damaging current backflow through the device when it is powered down.
- What is the significance of the overvoltage-tolerant inputs/outputs?
The overvoltage-tolerant inputs/outputs allow for mixed-voltage-mode data communications.
- What are the ESD protection levels for this device?
The device has ESD protection exceeding JESD 22 (2000-V Human-Body Model, 200-V Machine Model, 1000-V Charged-Device Model).
- How do the control inputs VIH/VIL levels work?
The control inputs VIH/VIL levels are referenced to VCCA voltage.
- What is the purpose of the output-enable (OE) input?
The output-enable (OE) input can be used to disable the outputs and isolate the buses.
- What are the operating temperature ranges for this device?
The operating temperature range is from -40°C to 85°C.
- What types of packages are available for the SN74AVCA164245ZQLR?
The device is available in TSSOP, TVSOP, and VFBGA packages.
