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AM27X020-90PC

AM27X020-90PC首页预览图
型号: AM27X020-90PC
PDF文件:
  • AM27X020-90PC PDF在线浏览
功能描述: 2 Megabit (256 K x 8-Bit) CMOS ExpressROM Device
PDF文件大小: 136.48 Kbytes
PDF页数: 共10页
制造商: AMD[Advanced Micro Devices]
制造商LOGO: AMD[Advanced Micro Devices] LOGO
制造商网址: http://www.amd.com
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PDF页面索引
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FINAL
Publicati on# 15652 Rev: D Amendment/0
Issue Date: May 1998
Am27X020
2 Megabit (256 K x 8-Bit) CMOS ExpressROM Device
DISTINCTIVE CHARACTERISTICS
As an O TP EPROM alternative:
Factory optimized programming
Fully tested and guaranteed
As a Mask ROM alternative:
Shorter leadtime
Lower volume per code
Fast access time
75 ns
Single +5 V power supply
Compatible with JEDEC-approved EPROM
pinout
±10% power supply tolerance
High noise immunity
Low power dissipation
100 µA maximum CMOS standby current
Available in Plastic Dual-In-line Package (PDIP)
and Plastic Leaded Chip Carrier (PLCC)
Latch-up protected to 100 mA from –1 V to
V
CC
+ 1 V
Versatile features f or simple interfacing
Both CMOS and TTL input/output compatibility
Two line control functions
GENERAL DESCRIPTION
The Am27X020 is a factory programmed and tested
O TP EPROM. It is progra mmed after packag ing prior to
final test. Every device is rigorously tested under AC
and DC operating conditions to your stable code. It is
organized as 256 Kwords by 8 bits per word and is
available in plastic dual in-line packages (PDIP), as
well as plastic leaded chip carrier (PLCC) packages.
ExpressROM devices provide a board-ready memory
solution for medium to high volume codes with short
leadtimes. This offers manufacturers a cost-effective
and fle xible alternative to O TP EPROMs and mask pro-
grammed ROMs.
Data can be accessed as fast as 75 ns, allowing
high-perfor mance microprocessors to operate with re-
duced WAIT states. The device offers separate Output
Enable (OE#) and Chip Enable (CE#) controls, thus
eliminating bus contention in a multiple bus micropro-
cessor sy ste m.
AMD’s CMOS process technology provides high
speed, low power, and high noise immunity. Typical
power consumption is only 100 mW in active mode,
and 100 µW in standby mode.
BLOCK DIAGRAM
15652D-1
A0–A17
Address
Inputs
CE#
OE#
V
CC
V
SS
Data Outputs DQ0–DQ7
Output
Buffers
Y
Gating
2,097,152
Bit Cell
Matrix
X
Decoder
Y
Decoder
Output Enable
Chip Enable
and
Prog Logic
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