P4C1681, P4C1682
ULTRA HIGH SPEED 4K x 4
STATIC CMOS RAMS
FEATURES
Fully TTL Compatible Inputs and Outputs
Full CMOS, 6T Cell
StandardPinout(JEDECApproved)
– 24-Pin 300 mil DIP
High Speed (Equal Access and Cycle Times)
– 12/15/20/25 ns (Commercial)
–20/25/35ns(Military)
– 24-Pin 300 mil SOIC
– 24-Pin 300 mil SOJ
Low Power Operation
– 24-Pin Solder Seal Flat Pack
– 28-Pin LCC (450 mil x 450 mil)
Single 5V ± 10%Power Supply
Separate Inputs and Outputs
– P4C1681 Input Data at Outputs during Write
– P4C1682 Outputs in High Z during Write
DESCRIPTION
Access times as fast as 12 nanoseconds are available,
permitting greatly enhanced system operating speeds.
The P4C1681 and P4C1682are16,384-bit(4Kx4)ultra
high speed static RAMs similar to theP4C168,but with
separate data I/O pins. The P4C1681 features a
transparent write operation; the outputs of the P4C1682
are in high impedance during the write cycle. All devices
have low power standby modes. The RAMs operate
from a single 5V ± 10% tolerance power supply.
.
CMOS is used to reduce power consumption.
TheP4C1681andP4C1682areavailablein24-pin300mil
DIP, SOIC, SolderSealFlatpack, andSOJpackages, as
well as a 28-pin LCC package, providing excellent board
leveldensities.
FUNCTIONALBLOCKDIAGRAM
PINCONFIGURATIONS
LCC (L5-1)
DIP (P4,C4), SOIC (S4), SOJ (J4)
SOLDER SEAL FLAT PACK (FS-1)
Document # SRAM109 REV A
Revised October 2005
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