Overview
The SN74AXC1T45DBVR, produced by Texas Instruments, is a single-bit noninverting bus transceiver designed for voltage level translation. This device operates with two separate configurable power-supply rails, allowing each port to function with supply voltages ranging from 0.65 V to 3.6 V. The A port tracks VCCA, and the B port tracks VCCB, enabling flexible voltage translation across a wide range of supply voltages. The direction of signal propagation is controlled by the DIR pin, which determines whether the translation is from Port A to Port B or vice versa. This device is particularly useful in applications requiring robust power sequencing and glitch suppression, ensuring reliable operation in various environments.
Key Specifications
| Parameter | Value | Unit | Conditions |
|---|---|---|---|
| Operating Temperature | –40°C to +125°C | °C | |
| Supply Voltage Range (VCCA and VCCB) | 0.65 V to 3.6 V | V | |
| Maximum Quiescent Current (ICCA + ICCB) | 10 µA (85°C), 16 µA (125°C) | µA | |
| Propagation Delay (A to B) | 0.5 ns to 173 ns | ns | –40°C to 125°C |
| ESD Protection | ±8000 V (HBM), ±1000 V (CDM) | V | |
| Junction Temperature | 150°C | °C | |
| Storage Temperature | –65°C to 150°C | °C | |
| Package Types | DBV (SOT-23), DCK (SC70), DRL (SOT-5X3), DEA (X2SON), DTQ (X2SON) |
Key Features
- Up and down voltage translation across 0.65 V to 3.6 V
- Glitch suppression circuitry for improved power sequencing performance
- VCC isolation feature: if either VCC input is below 100 mV, all I/Os become high-impedance
- Support for partial-power-down mode operation with Ioff current protection
- High-speed translation support up to 500 Mbps when translating from 1.8 V to 3.3 V
- ESD protection exceeding JESD 22 standards: ±8000 V (HBM), ±1000 V (CDM)
- Latch-up performance exceeds 100 mA per JESD 78, Class II
Applications
- Enterprise and communications systems
- Industrial automation and control systems
- Personal electronics and consumer devices
- Automotive systems (for the SN74AXC1T45-Q1 variant, which is AEC-Q100 qualified)
Q & A
- What is the operating temperature range of the SN74AXC1T45DBVR?
The operating temperature range is –40°C to +125°C.
- What is the supply voltage range for VCCA and VCCB?
The supply voltage range for both VCCA and VCCB is 0.65 V to 3.6 V.
- How does the DIR pin control signal propagation?
The DIR pin determines the direction of signal propagation. A logic high on the DIR pin enables translation from Port A to Port B, and a logic low enables translation from Port B to Port A.
- What is the maximum quiescent current for this device?
The maximum quiescent current (ICCA + ICCB) is 10 µA at 85°C and 16 µA at 125°C.
- What kind of ESD protection does the SN74AXC1T45DBVR offer?
The device offers ESD protection exceeding JESD 22 standards: ±8000 V (HBM) and ±1000 V (CDM).
- Can the SN74AXC1T45DBVR support high-speed data translation?
Yes, it supports high-speed translation up to 500 Mbps when translating from 1.8 V to 3.3 V.
- What is the purpose of the VCC isolation feature?
The VCC isolation feature ensures that if either VCCA or VCCB is below 100 mV, both I/O ports enter a high-impedance state by disabling their outputs.
- Is the SN74AXC1T45DBVR suitable for partial-power-down applications?
Yes, it is fully specified for partial-power-down applications using the Ioff current protection circuitry.
- What are the package options available for the SN74AXC1T45DBVR?
The device is available in DBV (SOT-23), DCK (SC70), DRL (SOT-5X3), DEA (X2SON), and DTQ (X2SON) packages.
- What are some common applications for the SN74AXC1T45DBVR?
Common applications include enterprise and communications systems, industrial automation, personal electronics, and automotive systems (for the SN74AXC1T45-Q1 variant).
