Overview
The SN74AXC1T45, produced by Texas Instruments, is a single-bit dual-supply bus transceiver designed for voltage translation across a wide range of supply voltages. This device operates with supply voltages from 0.65V to 3.6V on both the A and B ports, making it highly versatile for various applications. It features glitch suppression circuitry to improve power sequencing performance and supports up to 500Mbps data transfer rates when translating between 1.8V and 3.3V. The SN74AXC1T45 also includes VCC isolation and partial-power-down mode, enhancing its functionality in power-sensitive designs.
Key Specifications
| Parameter | Min | Max | Unit |
|---|---|---|---|
| Supply Voltage (VCCA, VCCB) | 0.65 | 3.6 | V |
| Operating Temperature | -40 | 125 | °C |
| Maximum Quiescent Current (ICCA + ICCB) | 10 | 16 | µA |
| Data Transfer Rate | - | 500 | Mbps |
| ESD Protection (Human Body Model) | - | ±8000 | V |
| ESD Protection (Charged-Device Model) | - | ±1000 | V |
| Junction Temperature | - | 150 | °C |
| Storage Temperature | -65 | 150 | °C |
Key Features
- Up and down voltage translation across 0.65V to 3.6V
- Glitch suppression circuitry for improved power sequencing performance
- VCC isolation feature: disables outputs if either VCC input is below 100mV
- Partial-power-down mode operation with Ioff protection
- Supports up to 500Mbps data transfer rates when translating between 1.8V and 3.3V
- Latch-up performance exceeds 100mA per JESD 78, Class II
- ESD protection exceeds JESD 22: 8000-V human body model and 1000-V charged-device model
Applications
- Enterprise and communications systems
- Industrial applications
- Personal electronics
- Automotive systems (for the SN74AXC1T45-Q1 variant): ADAS, HEV, and infotainment
Q & A
- What is the operating temperature range of the SN74AXC1T45?
The operating temperature range is from -40°C to 125°C. - What are the supply voltage ranges for VCCA and VCCB?
Both VCCA and VCCB can operate with supply voltages from 0.65V to 3.6V. - What is the maximum data transfer rate supported by the SN74AXC1T45?
The device supports up to 500Mbps data transfer rates when translating between 1.8V and 3.3V. - What is the purpose of the DIR pin?
The DIR pin determines the direction of signal propagation. Setting it HIGH translates signals from Port A to Port B, and setting it LOW translates signals from Port B to Port A. - Does the SN74AXC1T45 have ESD protection?
Yes, it exceeds JESD 22 standards with 8000-V human body model and 1000-V charged-device model ESD protection. - What is the VCC isolation feature?
If either VCCA or VCCB is below 100mV, the device disables its outputs and enters a high-impedance state. - Can the SN74AXC1T45 operate in partial-power-down mode?
Yes, it supports partial-power-down mode operation with Ioff protection. - What are the package options for the SN74AXC1T45?
The device is available in DBV (SOT-23), DCK (SC70), DRL (SOT-5X3), DEA (X2SON), and DTQ (X2SON) packages. - Is the SN74AXC1T45 suitable for automotive applications?
Yes, the SN74AXC1T45-Q1 variant is AEC-Q100 qualified for automotive use. - What is the junction temperature limit for the SN74AXC1T45?
The junction temperature limit is 150°C.
