Overview
The SN74AXC1T45DCKR is a single-bit noninverting bus transceiver produced by Texas Instruments. This device is designed to operate with two separate configurable power-supply rails, allowing for voltage translation between different voltage levels. The SN74AXC1T45 is operational with supply voltages as low as 0.65 V and up to 3.6 V on both the A and B ports. The device features a direction control pin (DIR) that determines the signal propagation direction between the ports. It is fully specified for partial-power-down applications and includes various protection features such as glitch suppression and VCC isolation.
Key Specifications
| Parameter | Min | Max | Unit | Description |
|---|---|---|---|---|
| VCCA (Supply Voltage A) | 0.65 | 3.6 | V | A-port supply voltage |
| VCCB (Supply Voltage B) | 0.65 | 3.6 | V | B-port supply voltage |
| Operating Temperature | –40 | 125 | °C | Operating free-air temperature range |
| Quiescent Current (ICCA + ICCB) | 10µA (at 85°C) | 16µA (at 125°C) | µA | Maximum quiescent current |
| Data Rate | Up to 500Mbps | Mbps | When translating from 1.8V to 3.3V | |
| ESD Protection | ±8000V (HBM), ±1000V (CDM) | V | Human-body model and charged-device model | |
| Package Type | SOT-SC70 (DCK) | Package type with 6 pins |
Key Features
- Up and down voltage translation across 0.65 V to 3.6 V
- Operating temperature range: –40°C to +125°C
- Designed with glitch suppression circuitry to improve power sequencing performance
- VCC isolation feature: If either VCC input is below 100mV, all I/Os outputs are disabled and become high-impedance
- Ioff supports partial-power-down mode operation
- 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
Q & A
- What is the SN74AXC1T45DCKR used for?
The SN74AXC1T45DCKR is a single-bit noninverting bus transceiver used for voltage translation between different voltage levels in various electronic systems.
- What are the operating voltage ranges for the A and B ports?
The A and B ports can operate with supply voltages ranging from 0.65 V to 3.6 V.
- How does the DIR pin control signal propagation?
The DIR pin determines the direction of signal propagation. When set to logic high, translation is from Port A to Port B, and when set to logic low, translation is from Port B to Port A.
- What is the maximum data rate supported by the SN74AXC1T45DCKR?
The device supports up to 500Mbps data rate when translating from 1.8V to 3.3V.
- What is the VCC isolation feature?
If either VCCA or VCCB is less than 100mV, both I/O ports enter a high-impedance state by disabling their outputs.
- Does the SN74AXC1T45DCKR support partial-power-down mode?
Yes, the device is fully specified for partial-power-down applications using the Ioff current.
- What level of ESD protection does the SN74AXC1T45DCKR offer?
The device offers ESD protection exceeding JESD 22: 8000-V human body model and 1000-V charged-device model.
- What is the operating temperature range of the SN74AXC1T45DCKR?
The operating temperature range is –40°C to +125°C.
- What package types are available for the SN74AXC1T45?
The device is available in several package types including SOT-SC70 (DCK), SOT-23 (DBV), SOT-5X3 (DRL), X2SON (DEA and DTQ).
- What is the purpose of the glitch suppression circuitry?
The glitch suppression circuitry improves power sequencing performance by allowing either supply rail to be powered on or off in any order.
