SN74AXC1T45 (正在供货)


单位双电源总线收发器 - SN74AXC1T45

Prototype Sample Availability

Prototype samples available for the latest one bit direction controlled level translator: PSN74AXC1T45


The SN74AXC1T45 is a single-bit noninverting bus transceiver that uses two separate configurable power-supply rails. The device is operational with both VCCA and VCCB supplies as low as 0.65 V. The A port is designed to track VCCA, which accepts any supply voltage from 0.65 V to 3.6 V. The B port is designed to track VCCB, which also accepts any supply voltage from 0.65 V to 3.6 V.

The DIR pin determines the direction of signal propagation. With the DIR pin configured HIGH, translation is from Port A to Port B. With DIR configured LOW, translation is from Port B to Port A. The DIR pin is referenced to VCCA, meaning that its logic-high and logic-low thresholds track with VCCA.

This device is fully specified for partial-power-down applications using the Ioff current. The Ioff protection circuitry ensures that no excessive current is drawn from or to an input, output, or combined I/O that is biased to a specific voltage while the device is powered down.

The VCC isolation feature ensures that if either VCCA or VCCB is less than 100 mV, both I/O ports enter a high-impedance state by disabling their outputs.

Glitch-free supply sequencing permits either supply rail to be powered on or off, in any order, without producing a data glitch (that is an output waveform that momentarily transitions from Logic Low to Logic High).


  • Up and Down Translation Across 0.65 V to 3.6 V
  • Operating Temperature: –40°C to +125°C
  • Glitch Free Power Supply Sequencing
  • Maximum Quiescent Current (ICCA + ICCB) of 6 µA (85°C Maximum) and 14 µA (125°C Maximum)
  • 500-Mbps Support When Both VCCA and VCCB Are at Least 1.65 V
  • VCC Isolation Feature
    • If Either VCC Input is Below 100 mV, All I/Os Outputs are Disabled and Become High-Impedance
  • Ioff Supports Partial-Power-Down Mode Operation
  • Latch-Up Performance Exceeds 100 mA Per JESD 78, Class II
  • ESD Protection Exceeds JESD 22
    • 8000-V Human Body Model
    • 1000-V Charged-Device Model

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参数 与其它产品相比 方向控制电压转换

Technology Family
Bits (#)
VCC (Min) (V)
VCC (Max) (V)
Voltage (Nom) (V)
F @ Nom Voltage (Max) (Mhz)
ICC @ Nom Voltage (Max) (mA)
Operating Temperature Range (C)
-40 to 125