Overview
The SN74AXCH8T245 device, produced by Texas Instruments, is an 8-bit non-inverting bus transceiver designed to resolve voltage level mismatches between devices operating at various voltage nodes. It supports voltage translation between the latest voltage nodes (0.7 V, 0.8 V, and 0.9 V) and industry standard voltage nodes (1.8 V, 2.5 V, and 3.3 V) and vice versa. The device operates using two independent power-supply rails (VCCA and VCCB), each accepting supply voltages from 0.65 V to 3.6 V. It is suitable for asynchronous communication between data buses and features output-enable and direction-control inputs for flexible data transmission and bus isolation.
Key Specifications
| Parameter | Value |
|---|---|
| Package | TSSOP (24 pins) |
| Operating Temperature Range | -40°C to 125°C |
| Supply Voltage Range | 0.65 V to 3.6 V |
| Number of Bits | 8 |
| Propagation Delay | Up to 178 ns |
| Output Characteristics | 3-State |
| ESD Protection | 8000-V Human-Body Model, 1000-V Charged-Device Model |
| Latch-Up Performance | Exceeds 100 mA per JESD 78, Class II |
| Body Size | 7.80 mm × 4.40 mm |
Key Features
- Qualified fully configurable dual-rail design allowing each port to operate with a power supply range from 0.65 V to 3.6 V.
- Operating temperature range from -40°C to +125°C.
- Bus-hold on data inputs eliminates the need for external pullup or pulldown resistors.
- Multiple direction control pins for simultaneous up and down translation.
- Up to 380 Mbps support when translating from 1.8 V to 3.3 V.
- VCC isolation feature to effectively isolate both buses in a power-down scenario.
- Partial power-down mode to limit backflow current in a power-down scenario.
- Compatible with SN74AVCH8T245 and 74AVCH8T245 level shifters.
- ESD protection exceeds JESD 22 standards.
Applications
- Enterprise and Communications
- Wireless Infrastructure
- Building Automation
- Data Center Switches
- Enterprise-Solid State Drive
- Rack Server
- EPOS (Electronic Point of Sale)
Q & A
- What is the primary function of the SN74AXCH8T245 device?
The primary function is to resolve voltage level mismatches between devices operating at different voltage nodes. - What is the operating temperature range of the SN74AXCH8T245?
The operating temperature range is from -40°C to +125°C. - What is the supply voltage range for the SN74AXCH8T245?
The supply voltage range is from 0.65 V to 3.6 V. - Does the SN74AXCH8T245 require external pullup or pulldown resistors?
No, the bus-hold on data inputs eliminates the need for external pullup or pulldown resistors. - What is the maximum propagation delay of the SN74AXCH8T245?
The maximum propagation delay is up to 178 ns. - Is the SN74AXCH8T245 compatible with single-supply systems?
Yes, it is compatible with single-supply systems. - What is the ESD protection level of the SN74AXCH8T245?
The ESD protection exceeds 8000-V Human-Body Model and 1000-V Charged-Device Model. - What are the typical applications of the SN74AXCH8T245?
Typical applications include enterprise and communications, wireless infrastructure, building automation, and data center switches. - Does the SN74AXCH8T245 support partial power-down mode?
Yes, it supports partial power-down mode to limit backflow current. - Is the SN74AXCH8T245 RoHS compliant?
Yes, it is RoHS compliant.
