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SN74AUCH244RGYR

Octal Buffer/Driver with 3-State Outputs

Packaging

Package | PIN: RGY | 20
Temp: I (-40 to 85)
Carrier: Cut Tape
Qty Price
1-9 $1.36
10-24 $1.22
25-99 $1.13
100-249 $0.96
250-499 $0.89
500-749 $0.73
750-999 $0.58
1000+ $0.52

Features

  • Optimized for 1.8-V Operation and is 3.6-V I/O Tolerant to Support Mixed-Mode Signal Operation
  • Ioff Supports Partial-Power-Down Mode Operation
  • Sub 1-V Operable
  • Max tpd of 1.9 ns at 1.8 V
  • Low Power Consumption, 20-µA Max ICC
  • ±8-mA Output Drive at 1.8 V
  • Bus Hold on Data Inputs Eliminates the Need for External Pullup/Pulldown Resistors
  • Latch-Up Performance Exceeds 100 mA Per JESD 78, Class II
  • ESD Protection Exceeds JESD 22
    • 2000-V Human-Body Model (A114-A)
    • 200-V Machine Model (A115-A)
    • 1000-V Charged-Device Model (C101)

Texas Instruments  SN74AUCH244RGYR

This octal buffer/driver is operational at 0.8-V to 2.7-V VCC, but is designed specifically for 1.65-V to 1.95-V VCC operation.

The SN74AUCH244 is organized as two 4-bit line drivers with separate output-enable (OE)\ inputs. When OE\ is low, the device passes data from the A inputs to the Y outputs. When OE\ is high, the outputs are in the high-impedance state.

To ensure the high-impedance state during power up or power down, OE\ should be tied to VCC through a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.

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.

This device is fully specified for partial-power-down applications using Ioff. The Ioff circuitry disables the outputs, preventing damaging current backflow through the device when it is powered down.