Overview
The SN74LVC8T245DGVRG4 is an 8-bit non-inverting bus transceiver manufactured by Texas Instruments. This device is designed for bidirectional voltage level translation and asynchronous communication between two data buses. It operates with configurable dual power supply rails, allowing each port to function over a wide voltage range from 1.65 V to 5.5 V. The SN74LVC8T245 is optimized for universal low-voltage translation between various voltage nodes such as 1.8 V, 2.5 V, 3.3 V, and 5.5 V.
Key Specifications
| Parameter | Value |
|---|---|
| Supply Voltage (VCCA and VCCB) | 1.65 V to 5.5 V |
| Operating Temperature Range | -40°C to 85°C |
| Package Type | TVSOP (DGV) - 24 pins |
| ESD Protection | 4000-V Human-Body Model, 100-V Machine Model, 1000-V Charged-Device Model |
| Latch-up Performance | Exceeds 100 mA per JESD 78, class II |
| Input Transition Rate | Maximum input transition rate with < 4 channels switching simultaneously |
Key Features
- Control inputs VIH/VIL levels are referenced to VCCA voltage
- VCC isolation feature – if either VCC input is at GND, all outputs are in the high-impedance state
- Fully configurable dual-rail design allows each port to operate over the full 1.65-V to 5.5-V power-supply range
- ESD protection exceeds JESD 22 standards
- Latch-up performance exceeds 100 mA per JESD 78, class II
- Designed for partial-power-down applications using Ioff circuitry
Applications
- Personal electronic devices
- Industrial applications
- Enterprise systems
- Telecommunications equipment
Q & A
- What is the voltage range for the SN74LVC8T245? The device operates with supply voltages (VCCA and VCCB) ranging from 1.65 V to 5.5 V.
- What is the purpose of the DIR and OE inputs? The DIR and OE inputs control the direction of data transmission and the output enable state, respectively.
- What is the ESD protection level of the SN74LVC8T245? The device has ESD protection exceeding 4000-V Human-Body Model, 100-V Machine Model, and 1000-V Charged-Device Model.
- Can the SN74LVC8T245 operate in partial-power-down mode? Yes, the device is fully specified for partial-power-down applications using Ioff circuitry.
- What is the operating temperature range of the SN74LVC8T245? The operating temperature range is -40°C to 85°C.
- What package types are available for the SN74LVC8T245? The device is available in TVSOP (DGV) packages with 24 pins.
- How does the VCC isolation feature work? If either VCC input is at GND, all outputs are in the high-impedance state.
- What are the typical applications of the SN74LVC8T245? Typical applications include personal electronic devices, industrial systems, enterprise systems, and telecommunications equipment.
- What is the latch-up performance of the SN74LVC8T245? The latch-up performance exceeds 100 mA per JESD 78, class II.
- How does the device handle input circuitry? The input circuitry on both A and B ports is always active and must have a logic HIGH or LOW level applied to prevent excess ICC and ICCZ.
