SN74LVC16T245
- Control Inputs VIH/VIL Levels are Referenced to
VCCA Voltage - VCC Isolation Feature – If Either VCC Input is at
GND, Both Ports are in the High-Impedance State - Overvoltage-Tolerant Inputs and Outputs Allow
Mixed Voltage-Mode Data Communications - Fully Configurable Dual-Rail Design Allows Each
Port to Operate Over the Full 1.65-V to 5.5-V
Power-Supply Range - Ioff Supports Partial-Power-Down Mode Operation
- Latch-Up Performance Exceeds 100 mA Per
JESD 78, Class II - ESD Protection Exceeds JESD 22
This 16-bit noninverting bus transceiver uses two separate configurable power-supply rails. The A port is designed to track VCCA. VCCA accepts any supply voltage from 1.65 V to 5.5 V. The B port is designed to track VCCB. VCCB accepts any supply voltage from 1.65 V to 5.5 V. This allows for universal low-voltage bidirectional translation between any of the 1.8-V, 2.5-V, 3.3-V, and 5-V voltage nodes.
The SN74LVC16T245 device is designed for asynchronous communication between two data buses. The logic levels of the direction-control (DIR) input and the output-enable (OE) input activate either the B-port outputs or the A-port outputs or place both output ports into the high-impedance mode. The device transmits data from the A bus to the B bus when the B-port outputs are activated, and from the B bus to the A bus when the A-port outputs are activated. The input circuitry on both A and B ports always is active and must have a logic HIGH or LOW level applied to prevent excess ICC and ICCZ.
The SN74LVC16T245 control pins (1DIR, 2DIR, 1OE, and 2OE) are supplied by VCCA.
This device is fully specified for partial-power-down applications using Ioff. The Ioff circuitry disables the outputs, preventing damaging current backflow through the device when it is powered down.
The VCC isolation feature ensures that if either VCC input is at GND, then both ports are in the high-impedance state. To ensure the high-impedance state during power up or power down, OE should be tied to VCC through a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.
技术文档
| 顶层文档 | 类型 | 标题 | 格式选项 | 下载最新的英语版本 | 日期 | |
|---|---|---|---|---|---|---|
| * | 数据表 | SN74LVC16T245 16-bit Dual-Supply Bus Transceiver With Configurable Level-Shifting / Voltage Translation and Tri-State Outputs 数据表 (Rev. B) | PDF | HTML | 2015-4-28 | ||
| 应用手册 | 原理图检查清单 - 使用自动双向转换器进行设计的指南 | PDF | HTML | 英语版 | PDF | HTML | 2024-12-3 | |
| 应用手册 | 原理图检查清单 - 使用固定或方向控制转换器进行设计的指南 | PDF | HTML | 英语版 | PDF | HTML | 2024-10-3 | |
| 应用手册 | Understanding Transient Drive Strength vs. DC Drive Strength in Level-Shifters (Rev. A) | PDF | HTML | 2024-7-3 | |||
| 选择指南 | Voltage Translation Buying Guide (Rev. A) | 2021-4-15 |
设计与开发
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| 封装 | 引脚 | CAD 符号、封装和 3D 模型 |
|---|---|---|
| TVSOP (DGV) | 48 | Ultra Librarian |
| SSOP (DL) | 48 | Ultra Librarian |
| TSSOP (DGG) | 48 | Ultra Librarian |