© 1999 Fairchild Semiconductor Corporation DS009585 www.fairchildsemi.com
April 1988
Revised August 1999
7
4F673A 1
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74F673A
16-Bit Serial-In, Serial/Parallel-Out Shift Register
General Description
The 74F673A contains a 16-bit serial-in, serial-out shift
register and a 16-bit Parallel-Out storage register. A single
pin serves either as an input for serial entry or as a 3-
STATE serial output. In the Serial-Out mode, the data recir-
culates in the shift register. By means of a separate clock,
the contents of the shift register are transferred to the stor-
age register for parallel outputting. The contents of the stor-
age register can also be parallel loaded back into the shift
register. A HIGH signal on the Chip Select input prevents
both shifting and parallel transfer. The storage register may
be cleared via STMR.
Features
a73 Serial-to-parallel converter
a73 16-bit serial I/O shift register
a73 16-bit parallel-out storage register
a73 Recirculating serial shifting
a73 Recirculating parallel transfer
a73 Common serial data I/O pin
a73 Slim 24 lead package

Ordering Code:
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Logic Symbols
IEEE/IEC
Connection Diagram
Order Number Package Number Package Description
74F673ASC M24B 24-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide
74F673APC N24A 24-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-010, 0.600 Wide
74F673ASPC N24C 24-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-100, 0.300 Wide