Overview
The SN74LVC8T245RHLR is an 8-bit non-inverting bus transceiver produced by Texas Instruments. It is designed to enable bidirectional voltage level translation between two data buses, each operating on different voltage levels. This device is optimized to work with dual power supply rails, VCCA and VCCB, which can be set anywhere from 1.65 V to 5.5 V. This flexibility makes it ideal for universal low-voltage bidirectional translation between various voltage nodes such as 1.8 V, 2.5 V, 3.3 V, and 5.5 V.
Key Specifications
| Parameter | Value |
|---|---|
| No. of Inputs | 8 |
| No. of Pins | 24 |
| Logic Case Style | VQFN |
| Supply Voltage Min | 1.65 V |
| Supply Voltage Max | 5.5 V |
| Operating Temperature Min | -40°C |
| Operating Temperature Max | 85°C |
| Logic Type | Bus Transceiver |
| Output Current | 32 mA |
| Propagation Delay | 4.3 ns |
| Supply Current | 15 µA |
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 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.
- Latch-up performance exceeds 100 mA per JESD 78, class II.
- ESD protection exceeds JESD 22.
- 4000-V Human-Body Model (A114-A), 100-V Machine Model (A115-A), and 1000-V Charged-Device Model (C101) ESD protection.
Applications
The SN74LVC8T245RHLR is suitable for various applications requiring asynchronous communication between two data buses operating at different voltage levels. This includes but is not limited to:
- Universal low-voltage bidirectional translation between different voltage nodes (e.g., 1.8 V, 2.5 V, 3.3 V, and 5.5 V).
- Partial-power-down applications where the device can be powered down without causing current backflow.
- Systems requiring high ESD protection and latch-up performance.
Q & A
- What is the primary function of the SN74LVC8T245RHLR?
The primary function is to act as an 8-bit non-inverting bus transceiver with configurable dual power supply rails for bidirectional voltage level translation. - What is the operating voltage range for the SN74LVC8T245RHLR?
The device operates over a voltage range of 1.65 V to 5.5 V for both VCCA and VCCB. - What is the maximum output current of the SN74LVC8T245RHLR?
The maximum output current is 32 mA. - What is the propagation delay of the SN74LVC8T245RHLR?
The propagation delay is 4.3 ns. - Does the SN74LVC8T245RHLR have ESD protection?
Yes, it exceeds JESD 22 standards with 4000-V Human-Body Model, 100-V Machine Model, and 1000-V Charged-Device Model protection. - What is the operating temperature range of the SN74LVC8T245RHLR?
The operating temperature range is -40°C to 85°C. - What package type is the SN74LVC8T245RHLR available in?
The device is available in a 24-pin VQFN package. - Is the SN74LVC8T245RHLR RoHS compliant?
Yes, it is RoHS compliant. - What is the purpose of the VCC isolation feature?
The VCC isolation feature ensures that if either VCC input is at GND, all outputs are in the high-impedance state. - Can the SN74LVC8T245RHLR be used in partial-power-down applications?
Yes, the device is fully specified for partial-power-down applications using Ioff circuitry).
