HD74ALVCH16835 데이터 시트보기 (PDF) - Hitachi -> Renesas Electronics

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HD74ALVCH16835

18-bit Universal Bus Driver with 3-state Outputs

Hitachi -> Renesas Electronics 

HD74ALVCH16835

18-bit Universal Bus Driver with 3-state Outputs

ADE-205-126D (Z)

5th. Edition

December 1999

Description

The HD74ALVCH16835 is an 18-bit universal bus driver designed for 2.3 V to 3.6 V VCC operation. Data

flow from A to Y is controlled by the output enable (OE). The device operates in the transparent mode

when the latch enable (LE) input is high. The A data is latched if the clock (CLK) input is held at a high or

low logic level. If the LE is low, the A bus data is stored in the latch/flip flop on the low to high transition

of CLK. When OE is high, the outputs are in the high impedance state. To ensure the high impedance

state during power up or power down, the output ebable (OE) input 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 is provided to hold unused or floating data inputs at a valid logic level.

Features

• Supports unregulated battery operation down to 2.7 V

• Bus hold on data inputs eliminates the need for external pullup resistors.

• Distrlbuted VCC and GND pin conflguration minimizes high speed switching noise.

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