SN74AXC1T45 Single-bit dual-supply bus transceiver | TI.com

SN74AXC1T45 (ACTIVE)

Single-bit dual-supply bus transceiver

 

Description

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.

The glitch suppression circuitry enables either supply rail to be powered on or off in any order, providing robust power sequencing performance.

Features

  • Up and Down Translation Across 0.65 V to 3.6 V
  • Operating Temperature: –40°C to +125°C
  • Designed with glitch suppression circuitry to improve power sequencing performance
  • Maximum Quiescent Current (ICCA + ICCB) of 6 µA (85°C Maximum) and 14 µA (125°C Maximum)
  • Up to 500-Mbps Support When Translating from 1.8 to 3.3V
  • 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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Parametrics Compare all products in Direction controlled voltage translation

 
Technology Family
Application
Bits (#)
High input voltage (Min) (Vih)
High input voltage (Max) (Vih)
Output voltage (Min) (V)
Output voltage (Max) (V)
IOH (Max) (mA)
IOL (Max) (mA)
Package Group
Rating
SN74AXC1T45 SN74AVC1T45 SN74AVC4T245 SN74AVC4T245-Q1 SN74AVC4T774 SN74AVCH1T45 SN74AVCH4T245 SN74AXC4T245 SN74AXC8T245 SN74AXCH1T45 SN74LVC1T45
AXC     AVC     AVC     AVC     AVC     AVC     AVC     AXC     AXC     AXC     LVC    
GPIO
SPI
UART    
GPIO
SPI
UART
I2S    
UART
SPI
JTAG
I2S    
UART
SPI
JTAG
I2S    
SPI
UART
JTAG
I2S    
GPIO
I2S    
UART
JTAG
SPI
I2S    
UART
SPI
JTAG
I2S    
RGMII
SPI
UART
JTAG
I2S    
GPIO
SPI
UART    
GPIO    
1     1     4     4     4     1     4     4     8     1     1    
0.455     0.78     0.78     0.78     0.78     1     1.2     0.455     0.455     0.455     1.08    
3.6     3.6     3.6     3.6     3.6     3.6     3.6     3.6     3.6     3.6     5.5    
0.65     1.2     1.2     1.2     1.2     1.2     1.2     0.65     0.65     0.65     1.65    
3.6     3.6     3.6     3.6     3.6     3.6     3.6     3.6     3.6     3.6     5.5    
-12     -12     -12     -12     -12     -12     -12     -12     -12     -12     -32    
12     12     12     12     12     12     12     12     12     12     32    
SC70 | 6
SOT-23 | 6
SOT-5X3 | 6
X2SON | 6
X2SON | 6    
DSBGA | 6
SC70 | 6
SOT-23 | 6
SOT-5X3 | 6    
SOIC | 16
TSSOP | 16
TVSOP | 16
UQFN | 16
VQFN | 16    
VQFN | 16     TSSOP | 16
UQFN | 16
VQFN | 16    
DSBGA | 6
SC70 | 6
SOT-23 | 6    
SOIC | 16
TSSOP | 16
TVSOP | 16
UQFN | 16
VQFN | 16    
TSSOP | 16
UQFN | 16