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SN74AXC1T45 Single-Bit Dual-Supply Bus Transceivers

Texas Instruments' SN74AXC1T45 are single-bit dual-supply bus transceivers with configurable voltage translation and tri-state outputs

Image of Texas Instruments' SN74AXC1T45 Single-Bit Dual-Supply Bus TransceiversTexas Instruments' SN74AXC1T45 are single-bit noninverting bus transceivers that use two separate configurable power-supply rails. The devices are 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.

These devices are 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).

Features
  • 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 max.) and 14 µA (+125°C max.)
  • 500 Mbps support when both VCCA and VCCB are at least 1.65 V
  • Ioff supports partial-power-down mode operation

Applications

  • Enterprise and communications
  • Industrial
  • Personal electronics
  • VCC isolation feature
    • If either VCC input is below 100 mV, all I/Os outputs are disabled and become high-impedance
  • Latch-up performance exceeds 100 mA per JESD 78, Class II
  • ESD protection exceeds JESD 22
    • 8,000 V human-body model
    • 1,000 V charged-device model

SN74AXC1T45 Single-Bit Dual-Supply Bus Transceivers

ImageManufacturer Part NumberDescriptionAvailable QuantityView Details
IC TRNSLTR BIDIRECTIONAL SOT23-6SN74AXC1T45DBVRIC TRNSLTR BIDIRECTIONAL SOT23-63631 - ImmediateView Details
IC TRNSLTR BIDIRECTIONAL SOT563SN74AXC1T45DRLRIC TRNSLTR BIDIRECTIONAL SOT5630View Details
IC TRNSLTR BIDIRECTIONAL SC70-6SN74AXC1T45DCKRIC TRNSLTR BIDIRECTIONAL SC70-62262 - ImmediateView Details
SINGLE-BIT DUAL-SUPPLY BUS TRANSSN74AXC1T45DEARSINGLE-BIT DUAL-SUPPLY BUS TRANS1114 - ImmediateView Details
Published: 2018-05-09