Overview
The SN74AVCH4T245PWTE4, produced by Texas Instruments, is a 4-bit dual-supply voltage level transceiver designed for bidirectional level translation between different voltage nodes. This device is part of the AVC family and is optimized for low-voltage applications, supporting supply voltages from 0.8V to 3.6V. It allows for universal low-voltage bidirectional translation between any of the 1.2V, 1.5V, 1.8V, 2.5V, and 3.3V voltage nodes, making it highly versatile in various electronic systems.
Key Specifications
| Parameter | Description | Value |
|---|---|---|
| VCCA/VCCB Supply Voltage | Range of supply voltage for VCCA and VCCB | 0.8V to 3.6V |
| Operating Temperature | Free-air temperature range | –40°C to 85°C |
| Low-Level Output Current (IOL) | At different VCC levels | 8 mA (1.65V to 1.95V), 9 mA (2.3V to 2.7V), 12 mA (3V to 3.6V) |
| Input Transition Rise or Fall Rate | Δt/Δv | 5 ns/V |
| Junction-to-Ambient Thermal Resistance (RθJA) | Thermal resistance for different packages | 85.5°C/W (TSSOP), 126.0°C/W (SOIC), etc. |
| Propagation Delay Time (tPHL/tPLH) | At different VCCB levels | 2.9 ns to 10 ns depending on VCCB and temperature |
| Output Enable Time (tPZH/tPZL) | At different VCCB levels | 4.1 ns to 14.4 ns depending on VCCB and temperature |
Key Features
- Bidirectional Level Translation: Supports translation between any of the 1.2V, 1.5V, 1.8V, 2.5V, and 3.3V voltage nodes.
- Dual-Supply Voltage: VCCA and VCCB can be set independently within the range of 0.8V to 3.6V.
- 3-State Outputs: Outputs can be placed in a high-impedance state.
- Configurable Direction Control: Direction-control (DIR) input and output-enable (OE) input allow for flexible data transmission.
- Latch-Up Performance: Exceeds 100 mA per JESD 78, Class II.
- Thermal Performance: Various thermal metrics provided for different package types.
Applications
- Low-Voltage Systems: Ideal for systems requiring translation between different low-voltage nodes.
- Mobile Devices: Suitable for use in mobile devices where power efficiency and low voltage are critical.
- Embedded Systems: Useful in embedded systems that require data communication between different voltage domains.
- Industrial Automation: Can be used in industrial automation systems where data needs to be translated between different voltage levels.
Q & A
- What is the voltage range for VCCA and VCCB in the SN74AVCH4T245?
The voltage range for VCCA and VCCB is from 0.8V to 3.6V.
- What are the key applications of the SN74AVCH4T245?
The device is suitable for low-voltage systems, mobile devices, embedded systems, and industrial automation where data translation between different voltage domains is required.
- What is the propagation delay time for the SN74AVCH4T245?
The propagation delay time (tPHL/tPLH) varies from 2.9 ns to 10 ns depending on the VCCB level and temperature.
- Can the outputs of the SN74AVCH4T245 be placed in a high-impedance state?
- What is the thermal resistance (RθJA) for the TSSOP package of the SN74AVCH4T245?
The junction-to-ambient thermal resistance (RθJA) for the TSSOP package is approximately 85.5°C/W.
- What is the low-level output current (IOL) for the SN74AVCH4T245 at different VCC levels?
The low-level output current (IOL) is 8 mA for VCC levels between 1.65V and 1.95V, 9 mA for levels between 2.3V and 2.7V, and 12 mA for levels between 3V and 3.6V.
- Does the SN74AVCH4T245 support latch-up protection?
- How does the direction-control (DIR) input function in the SN74AVCH4T245?
The direction-control (DIR) input, along with the output-enable (OE) input, allows for the activation of either the A-port or B-port outputs or places both output ports into the high-impedance mode.
- What is the input transition rise or fall rate (Δt/Δv) for the SN74AVCH4T245?
The input transition rise or fall rate (Δt/Δv) is 5 ns/V.
- Can the SN74AVCH4T245 be used as two 2-bit transceivers or one 4-bit transceiver?
