Overview
The SN74LVC16T245DLR is a 16-bit dual-supply bus transceiver produced by Texas Instruments. This device is designed for asynchronous communication between two data buses and supports universal low-voltage bidirectional translation between various voltage nodes such as 1.8-V, 2.5-V, 3.3-V, and 5-V. It features two separate configurable power-supply rails, allowing each port to operate over a wide power-supply range from 1.65 V to 5.5 V. The device is packaged in a 48-pin SSOP (DL) package and operates within an operating temperature range of -40°C to 85°C.
Key Specifications
| Parameter | Specification |
|---|---|
| Package | SSOP (DL) with 48 pins |
| Operating Temperature Range (°C) | -40 to 85 |
| Power-Supply Range (V) | 1.65 V to 5.5 V for both VCCA and VCCB |
| Number of Bits | 16-bit |
| Control Pins Supply | VCCA |
| ESD Protection | Exceeds JESD 22 standards |
| Latch-Up Performance | Exceeds 100 mA per JESD 78, Class II |
Key Features
- 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.
- ESD protection exceeds JESD 22 standards and latch-up performance exceeds 100 mA per JESD 78, Class II.
Applications
The SN74LVC16T245DLR is suitable for various applications requiring asynchronous communication between two data buses with different voltage levels. This includes but is not limited to:
- Low-voltage bidirectional translation in mixed-voltage systems.
- Partial-power-down applications where power conservation is critical.
- Systems requiring high ESD protection and latch-up performance.
- Embedded systems, industrial control systems, and consumer electronics where data communication between different voltage domains is necessary.
Q & A
- What is the primary function of the SN74LVC16T245DLR?
The primary function is to act as a 16-bit dual-supply bus transceiver for asynchronous communication between two data buses with different voltage levels.
- What is the power-supply range for each port of the SN74LVC16T245DLR?
Each port can operate over a power-supply range from 1.65 V to 5.5 V.
- What is the VCC isolation feature?
If either VCC input is at GND, both ports are in the high-impedance state.
- Does the SN74LVC16T245DLR support partial-power-down mode?
Yes, it supports partial-power-down mode operation using Ioff circuitry.
- What is the package type and pin count of the SN74LVC16T245DLR?
The device is packaged in a 48-pin SSOP (DL) package.
- What are the operating temperature ranges for the SN74LVC16T245DLR?
The operating temperature range is from -40°C to 85°C.
- What kind of ESD protection does the SN74LVC16T245DLR offer?
The device offers ESD protection that exceeds JESD 22 standards.
- How does the device handle latch-up performance?
The latch-up performance exceeds 100 mA per JESD 78, Class II.
- What control pins are used for the SN74LVC16T245DLR?
The control pins (1DIR, 2DIR, 1OE, and 2OE) are supplied by VCCA.
- Why is it important to tie OE to VCC through a pullup resistor?
To ensure the high-impedance state during power up or power down.
