© 1999 Fairchild Semiconductor Corporation DS009493 www.fairchildsemi.com
April 1988
Revised July 1999
7
4F189 64-Bi
t Random
Access Mem
o
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y

wi
th 3-
S
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Out
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74F189
64-Bit Random Access Memory with 3-STATE Outputs
General Description
The F189 is a high-speed 64-bit RAM organized as a 16-
word by 4-bit array. Address inputs are buffered to mini-
mize loading and are fully decoded on-chip. The outputs
are 3-STATE and are in the high impedance state when-
ever the Chip Select (CS) input is HIGH. The outputs are
active only in the Read mode and the output data is the
complement of the stored data.
Features
a73 3-STATE outputs for data bus applications
a73 Buffered inputs minimize loading
a73 Address decoding on-chip
a73 Diode clamped inputs minimize ringing

Ordering Code:
Devices also available in Tape and Reel. Specify by appending suffix “X” to the ordering code.
Logic Symbols
IEEE/IEC
Connection Diagram
Order Number Package Number Package Description
74F189SC M16B 16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300” Wide
74F189SJ M16D 16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
74F189PC N16E 16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300” Wide