SN74AXCH1T45 Texas instruments

SN74AXCH1T45

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SN74AXCH1T45

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Описание

The SN74AXCH1T45 is a single-bit noninverting bus transceiver that uses two individually 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. Additionally the SN74AXCH1T45 is compatible with a single-supply system.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.Active bus-hold circuitry holds unused or undriven inputs at a valid logic state. Use of pullup or pulldown resistors with the bus-hold circuitry is not recommended. If a supply is present for VCCA or VCCB, the bus-hold circuitry always remains active on the A or B inputs respectively, independent of the state of the direction control pin.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 power supply sequencing allows either supply rail to be powered on or off in any order while providing robust power sequencing performance.

Fully Configurable Dual-Rail Design Allows Each Port to Operate With a Power Supply Range from 0.65 V to 3.6 V
Operating Temperature: –40°C to +125°C
Glitch-Free Power Supply Sequencing
Bus-hold on Data Inputs Eliminates the Need for External Pullup or Pulldown Resistors
Maximum Quiescent Current (I_CCA + I_CCB) of 10 µA (85°C Maximum) and 16 µA (125°C Maximum)
Up to 500-Mbps Support When Translating from 1.8 to 3.3 V
V_CC Isolation Feature
- If Either V_CC Input is Below 100 mV, All I/Os Outputs are Disabled and Become High-Impedance
I_off 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

Technology family	AXC
Applications	GPIO
Bits (#)	1
High input voltage (min) (V)	0.455
High input voltage (max) (V)	3.6
Vout (min) (V)	0.65
Vout (max) (V)	3.6
Data rate (max) (MBits)	500
IOH (max) (mA)	-12
IOL (max) (mA)	12
Supply current (max) (µA)	14
Features	Bus-hold, Output enable, Overvoltage tolerant inputs, Partial power down (Ioff), Vcc isolation
Input type	Standard CMOS
Output type	3-State, Balanced CMOS, Push-Pull
Rating	Catalog
Operating temperature range (°C)	-40 to 125