Am27C020-70JC5 반도체 회로 부품 판매점
2 Megabit (256 K x 8-Bit) CMOS EPROM
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 Advanced Micro Devices |
FINAL
Am27C020
2 Megabit (256 K x 8-Bit) CMOS EPROM
DISTINCTIVE CHARACTERISTICS
s Fast access time
— Speed options as fast as 55 ns
s Low power consumption
— 100 µA maximum CMOS standby current
s JEDEC-approved pinout
— Plug in upgrade of 1 Mbit EPROM
— Easy upgrade from 28-pin JEDEC EPROMs
s Single +5 V power supply
s ±10% power supply tolerance standard
s 100% Flashrite™ programming
— Typical programming time of 32 seconds
s Latch-up protected to 100 mA from –1 V to
VCC + 1 V
s High noise immunity
s Compact 32-pin DIP, PDIP, and PLCC packages
GENERAL DESCRIPTION
The Am27C020 is a 2 Megabit, ultraviolet erasable pro-
grammable read-only memory. It is organized as 256
Kwords 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 55 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’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.
All signals are TTL levels, including programming sig-
nals. Bit locations may be programmed singly, in
blocks, or at random. The device supports AMD’s
Flashrite programming algorithm (100 µs pulses), re-
sulting in a typical programming time of 32 seconds.
BLOCK DIAGRAM
OE#
CE#
PGM#
A0–A17
Address
Inputs
VCC
VSS
VPP
Output Enable
Chip Enable
and
Prog Logic
Y
Decoder
X
Decoder
Data Outputs
DQ0–DQ7
Output
Buffers
Y
Gating
2,097,152
Bit Cell
Matrix
11507H-1
Publication# 11507 Rev: H Amendment/0
Issue Date: May 1998
PRODUCT SELECTOR GUIDE
Family Part Number
Am27C020
Speed Options
VCC = 5.0 V ± 5%
-55
-75
-255
VCC = 5.0 V ± 10%
55
-70
-90
-120
-150
-200
Max Access Time (ns)
55 70 90 120 150 200 250
CE# (E#) Access (ns)
55 70 90 120 150 200 250
OE# (G#) Access (ns)
35 40 40 50 65 75 100
CONNECTION DIAGRAMS
Top View
DIP
PLCC
VPP
A16
A15
A12
A7
A6
A5
A4
A3
A2
A1
A0
DQ0
DQ1
DQ2
VSS
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
32 VCC
31 PGM# (P#)
30 A17
29 A14
28 A13
27 A8
26 A9
25 A11
24 OE# (G#)
23 A10
22 CE# (E#)
21 DQ7
20 DQ6
19 DQ5
18 DQ4
17 DQ3
11507H-2
A7
A6
A5
A4
A3
A2
A1
A0
DQ0
4 3 2 1 32 31 30
5 29
6 28
7 27
8 26
9 25
10 24
11 23
12 22
13 21
14 15 16 17 18 19 20
A14
A13
A8
A9
A11
OE# (G#)
A10
CE# (E#)
DQ7
11507H-3
Notes:
1. JEDEC nomenclature is in parenthesis.
2. The 32-pin DIP to 32-pin PLCC configuration varies from the JEDEC 28-pin DIP to 32-pin PLCC configuration.
PIN DESIGNATIONS
A0–A17 = Address Inputs
CE# (E#) = Chip Enable Input
DQ0–DQ7 = Data Input/Outputs
OE# (G#) = Output Enable Input
PGM# (P#) = Program Enable Input
VCC = VCC Supply Voltage
VPP = Program Voltage Input
VSS = Ground
LOGIC SYMBOL
18
A0–A17
DQ0–DQ7
CE# (E#)
PGM# (P#)
OE# (G#)
8
11507H-4
2 Am27C020
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( amd )
Am27C020-70JC5 cmos
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