Overview
The SN74LVCH16T245DGVR, produced by Texas Instruments, is a 16-bit dual-supply noninverting bus transceiver designed for bidirectional voltage level translation. This device operates with two separate configurable power-supply rails, allowing it to translate signals between different voltage nodes ranging from 1.65 V to 5.5 V. It is particularly useful in mixed-voltage-mode data communications, enabling universal low-voltage translation between 1.8-V, 2.5-V, 3.3-V, and 5-V systems.
Key Specifications
| Parameter | Min | Max | Unit |
|---|---|---|---|
| VCCA Supply Voltage | 1.65 | 5.5 | V |
| VCCB Supply Voltage | 1.65 | 5.5 | V |
| Input Voltage (VI) | -0.5 | 6.5 | V |
| Output Voltage (VO) | -0.5 | VCCA + 0.5 / VCCB + 0.5 | V |
| Operating Free-Air Temperature (TA) | -40 | 85 | °C |
| Junction-to-Ambient Thermal Resistance (RθJA) | 60 | - | °C/W |
Key Features
- Fully configurable dual-rail design allowing each port to operate over the full 1.65 V to 5.5 V power-supply range.
- Control inputs (DIR and OE) are supplied by VCCA.
- Overvoltage-tolerant inputs and outputs.
- Bus hold on data inputs eliminates the need for external pullup and pulldown resistors.
- Ioff supports partial-power-down mode operation.
- ESD protection exceeds JESD 22.
- Latch-up performance exceeds 100 mA per JESD 78, Class II.
- VCC isolation feature ensures that if either VCC input is at GND, all outputs are in the high-impedance state.
Applications
- Personal Electronics
- Industrial
- Enterprise Devices
- Telecom
Q & A
- What is the voltage range for the VCCA and VCCB supply voltages of the SN74LVCH16T245?
The voltage range for both VCCA and VCCB is from 1.65 V to 5.5 V.
- What is the purpose of the DIR and OE control inputs?
The DIR input determines the direction of data transmission (A to B or B to A), and the OE input enables or disables the outputs, placing them in a high-impedance state when set to high.
- What is the significance of the bus hold feature on the SN74LVCH16T245?
The bus hold feature holds unused or undriven inputs at a valid logic state, eliminating the need for external pullup and pulldown resistors.
- How does the VCC isolation feature work?
If either VCC input is at GND, the VCC isolation feature ensures that all outputs are in the high-impedance state.
- What are the thermal characteristics of the SN74LVCH16T245?
The junction-to-ambient thermal resistance (RθJA) varies depending on the package, with values such as 60 °C/W for the TSSOP package.
- What kind of ESD protection does the SN74LVCH16T245 offer?
The device offers ESD protection that exceeds JESD 22 standards.
- Can the SN74LVCH16T245 operate in partial-power-down mode?
- What are the typical applications of the SN74LVCH16T245?
The device is used in personal electronics, industrial, enterprise devices, and telecom applications.
- What packages are available for the SN74LVCH16T245?
The device is available in SSOP, TSSOP, TVSOP, and BGA packages.
- How does the device handle latch-up conditions?
The device's latch-up performance exceeds 100 mA per JESD 78, Class II standards.
