0
ACTIVE
Technology family |
HCT |
Supply voltage (min) (V) |
4.5 |
Supply voltage (max) (V) |
5.5 |
Number of channels |
8 |
IOL (max) (mA) |
6 |
IOH (max) (mA) |
-6 |
Supply current (max) (µA) |
80 |
Input type |
TTL-Compatible CMOS |
Output type |
3-State |
Features |
Balanced outputs, Input clamp diode, Very high speed (tpd 5-10ns) |
Rating |
Catalog |
Operating temperature range (°C) |
-40 to 85 |
PDIP (N)-20-228.702 mm² 24.33 x 9.4
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.
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