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74ABT646A

NXP
Part Number 74ABT646A
Manufacturer NXP
Description Octal bus transceiver/register
Published Apr 3, 2005
Detailed Description 74ABT646A Octal bus transceiver/register; 3-state Rev. 03 — 15 March 2010 Product data sheet 1. General description Th...
Datasheet PDF File 74ABT646A PDF File

74ABT646A
74ABT646A


Overview
74ABT646A Octal bus transceiver/register; 3-state Rev.
03 — 15 March 2010 Product data sheet 1.
General description The 74ABT646A high-performance BiCMOS device combines low static and dynamic power dissipation with high speed and high output drive.
The 74ABT646A transceiver/register consists of bus transceiver circuits with 3-state outputs, D-type flip-flops, and control circuitry arranged for multiplexed transmission of data directly from the input bus or the internal registers.
Data on the A bus or B bus will be clocked into the registers as the appropriate clock pin (CPAB or CPBA) goes HIGH.
Output Enable (OE) and Direction (DIR) pins are provided to control the transceiver function.
In the transceiver mode, data present at the high-impedance port may be stored in either the A or B register or both.
The Select (SAB, SBA) pins determine whether data is stored or transferred through the device in real-time.
The DIR pin determines which bus receives data when OE is active (LOW).
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