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74F646

Philips
Part Number 74F646
Manufacturer Philips
Description Octal transceiver/register
Published May 28, 2005
Detailed Description INTEGRATED CIRCUITS 74F646, 74F646A Octal transceiver/register, non-inverting (3-State) 74F648, 74F648A Octal transceiv...
Datasheet PDF File 74F646 PDF File

74F646
74F646

Overview
INTEGRATED CIRCUITS 74F646, 74F646A Octal transceiver/register, non-inverting (3-State) 74F648, 74F648A Octal transceiver/register, inverting (3-State) Product specification IC15 Data Handbook 1990 Sep 25 Philips Semiconductors Philips Semiconductors Product specification Transceivers/registers 74F646/A/74F648/A FEATURES • Combines 74F245 and two 74F374 type functions in one chip • High impedance base inputs for reduced loading (70µA in high and low states) DESCRIPTION The 74F646/74F646A and 74F648/74F648A transceivers/registers consist 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 or B bus will be clocked into the registers as the appropriate clock pin goes high.
Output enable (OE) and 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 determines which bus will receive data when the OE is active low.
In the isolation mode (OE = high), data from bus A may be stored in the B register and/or data from bus B may be stored in the A register.
When an output function is disabled, the input function is still enabled and may be used to store and transmit data.
Only one of the two buses, A or B may be driven at a time.
• Independent registers for A and B buses • Multiplexed real-time and stored data • Choice of non-inverting and inverting data paths • Controlled ramp outputs for 74F646A/74F648A • 3-state outputs • 300 mil wide 24-pin slim dip package TYPE 74F646/74F648 74F646A/74F648A TYPICAL fmax 115MHz 185MHz TYPICAL SUPPLY CURRENT ( TOTAL) 140mA 105mA ORDERING INFORMATION ORDER CODE DESCRIPTION 24–pin plastic slim DIP (300mil) 24–pin plastic SOL COMMERCIAL RANGE V...


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