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M27C64 Datasheet

  • M27C64

  • 64 Kilobit (8 K x 8-Bit) CMOS EPROM

  • 12頁

  • AMD

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FINAL
Am27C64
64 Kilobit (8 K x 8-Bit) CMOS EPROM
DISTINCTIVE CHARACTERISTICS
s
Fast access time
鈥?Speed options as fast as 45 ns
s
Low power consumption
鈥?20 碌A(chǔ) typical CMOS standby current
s
JEDEC-approved pinout
s
Single +5 V power supply
s
鹵10%
power supply tolerance standard
s
100% Flashrite鈩?programming
鈥?Typical programming time of 1 second
s
Latch-up protected to 100 mA from 鈥? V to
V
CC
+ 1 V
s
High noise immunity
s
Versatile features for simple interfacing
鈥?Both CMOS and TTL input/output compatibility
鈥?Two line control functions
s
Standard 28-pin DIP, PDIP, and 32-pin PLCC
packages
GENERAL DESCRIPTION
The Am27C64 is a 64-Kbit, ultraviolet erasable pro-
grammable read-only memory. It is organized as 8K
words by 8 bits per word, operates from a single +5 V
supply, has a static standby mode, and features fast
single address location programming. Products are
available in windowed ceramic DIP packages, as well
as plastic one time programmable (OTP) PDIP and
PLCC packages.
Data can be typically accessed in less than 45 ns, al-
lowing high-performance microprocessors to operate
without any WAIT states. The device offers separate
Output Enable (OE#) and Chip Enable (CE#) controls,
thus eliminating bus contention in a multiple bus micro-
processor system.
AMD鈥檚 CMOS process technology provides high
speed, low power, and high noise immunity. Typical
power consumption is only 80 mW in active mode, and
100 碌W in standby mode.
All signals are TTL levels, including programming sig-
nals. Bit locations may be programmed singly, in
blocks, or at random. The device supports AMD鈥檚
Flashrite programming algorithm (100 碌s pulses), re-
sulting in a typical programming time of 1 second.
BLOCK DIAGRAM
V
CC
V
SS
V
PP
OE#
CE#
PGM#
Output Enable
Chip Enable
and
Prog Logic
Y
Decoder
A0鈥揂12
Address
Inputs
Output
Buffers
Data Outputs
DQ0鈥揇Q7
Y
Gating
X
Decoder
65,538
Bit Cell
Matrix
11419E-1
Publication#
11419
Rev:
E
Amendment/0
Issue Date:
May 1998

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