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74ABT16646CSSC Fiches technique(PDF) 1 Page - Fairchild Semiconductor

No de pièce 74ABT16646CSSC
Description  16-Bit Transceivers and Registers with 3-STATE Outputs
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Fabricant  FAIRCHILD [Fairchild Semiconductor]
Site Internet  http://www.fairchildsemi.com
Logo FAIRCHILD - Fairchild Semiconductor

74ABT16646CSSC Fiches technique(HTML) 1 Page - Fairchild Semiconductor

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© 1999 Fairchild Semiconductor Corporation
DS011644
www.fairchildsemi.com
October 1993
Revised November 1999
74ABT16646
16-Bit Transceivers and Registers with 3-STATE Outputs
General Description
The ABT16646 consists of bus transceiver circuits with 3-
STATE, D-type flip-flops, and control circuitry arranged for
multiplexed transmission of data directly from the input bus
or from the internal registers. Data on the A or B bus will be
clocked into the registers as the appropriate clock pin goes
to a high logic level. Control OE and direction pins are pro-
vided to control the transceiver function. In the transceiver
mode, data present at the high impedance port may be
stored in either the A or the B register or in both. The select
controls can multiplex stored and real-time (transparent
mode) data. The direction control determines which bus
will receive data when the enable control OE is Active
LOW. In the isolation mode (control OE HIGH), A data may
be stored in the B register and/or B data may be stored in
the A register.
Features
s Independent registers for A and B buses
s Multiplexed real-time and stored data
s A and B output sink capability of 64 mA, source
capability of 32 mA
s Guaranteed latchup protection
s High impedance glitch free bus loading during entire
power up and power down cycle
s Nondestructive hot insertion capability
Ordering Code:
Devices also available in Tape and Reel. Specify by appending suffix letter “X” to the ordering code.
Logic Symbol
Pin Descriptions
Connection Diagram
Order Number
Package Number
Package Description
74ABT16646CSSC
MS56A
56-Lead Shrink Small Outline Package (SSOP), JEDEC MO-118, 0.300” Wide
74ABT16646CMTD
MTD56
56-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 6.1mm Wide
Pin Names
Description
A0–A15
Data Register A Inputs/
3-STATE Outputs
B0–B15
Data Register B Inputs/
3-STATE Outputs
CPABn, CPBAn
Clock Pulse Inputs
SABn, SBAn
Select Inputs
OEn
Output Enable Input
DIR
Direction Control Input


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