SN74HCT540N

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SN74HCT540N

Octal Buffers And Line Drivers With 3-State Outputs

Packaging

Package | PIN: N | 20
Temp: I (-40 to 85)
Carrier: Partial Tube
Qty Price
1-9 $0.58
10-24 $0.51
25-99 $0.47
100-249 $0.40
250-499 $0.36
500-749 $0.28
750-999 $0.21
1000+ $0.19

Features

  • Operating Voltage Range of 4.5 V to 5.5 V
  • Low Power Consumption, 80-µA Max ICC
  • Typical tpd = 12 ns
  • ±6-mA Output Drive at 5 V
  • Low Input Current of 1 µA Max
  • Inputs Are TTL-Voltage Compatible
  • High-Current 3-State Outputs Interface Directly With System Bus or Can Drive Up To 15 LSTTL Loads
  • Data Flow-Through Pinout (All Inputs on Opposite Side From Outputs)

Texas Instruments  SN74HCT540N

These octal buffers and line drivers are designed to have the performance of the ’HCT240 devices and a pinout with inputs and outputs on opposite sides of the package. This arrangement greatly facilitates printed circuit board layout.

The 3-state control gate is a 2-input NOR. If either output-enable (OE1\ or OE2\) input is high, all eight outputs are in the high-impedance state. The ’HCT540 devices provide inverted data at the outputs.

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.