AMD Advanced Micro Devices AM27X024-75PC, AM27X024-75JI, AM27X024-75JC, AM27X024-255PC, AM27X024-255JI Datasheet
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FINAL
Publication# 15652 Rev: D Amendment/0
Issue Date: May 1998
Am27X020
2 Megabit (256 K x 8-Bit) CMOS ExpressROM Device
DISTINCTIVE CHARACTERISTICS
■ As an OTP 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 wit h JEDEC-approved EPROM
pinout
■ ±10% power supply tolerance
■ High noise immunity
■ Low power dissipation
— 100 µA maximum CMOS standby current
■ Av ailable in Plastic Dual-In-line Pac kage (PDIP)
and Plastic Leaded Chip Carrier (PLCC)
■ Latch-up protected to 100 mA from –1 V to
V
CC
+ 1 V
■ Versatile features for simpl e int erfacing
— Both CMOS and TTL input/output compatibility
— Two line control functions
GENERAL DESCRIPTION
The Am27X020 is a factory programmed and tested
OTP EPROM. It is progra mmed after pac kaging prior to
final test. Every device is rigorously tested under AC
and DC operating conditions to your stable code. It is
organized as 2 56 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 flexible alternativ e to O TP EPROMs and mask programmed ROMs.
Data can be accessed as fast as 75 ns, allowing
high-performance microprocessors to operate with reduced WAIT states. The device offers separate Output
Enable (OE#) and Chip Enable (CE#) controls, thus
eliminating bus contention in a multiple bus microprocessor 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.
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
2 Am27X020
PRODUCT SELECTOR GUIDE
CONNECTION DIAGRAMS
Top View
DIP PLCC
Notes:.
1. JEDEC nomenclature is in parenthesis.
2. Don’t use (DU) for PLCC.
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
V
CC
=VCC Supply Voltage
V
PP
= Program Voltage Input
V
SS
= Ground
NC = No Internal Connection
LOGIC SYMBOL
Family Part Number Am27X020
Speed Options
V
CC
= 5.0 V ± 5% -255
V
CC
= 5.0 V ± 10% -75 -90 -120 -150 -200
Max Access Time (ns) 70 90 120 150 200 250
CE# (E#) Access (ns) 70 90 120 150 200 250
OE# (G#) Access (ns) 40 50 50 65 75 100
3
4
5
2
1
9
10
11
12
13
27
26
25
24
23
7
8
22
21
6
32
31
20
14
30
29
28
15
16
19
18
17
A6
A5
A4
A3
A2
A1
A0
A16
DQ0
A15
A12
A7
DQ1
DQ2
V
SS
A8
A9
A11
OE# (G#)
A10
CE# (E#)
DQ7
V
CC
PGM# (P#)
DQ6
A17
A14
A13
DQ5
DQ4
DQ3
V
PP
15652D-2
DQ6
V
PP
DQ5
DQ4
DQ3
13130234
5
6
7
8
9
10
11
12
13
17
18
19 2016
15
14
29
28
27
26
25
24
23
22
21
32
A7
A6
A5
A4
A3
A2
A1
A0
DQ0
A14
A13
A8
A9
A11
OE# (G#)
A10
CE# (E#)
DQ7
A12
A15
A16
V
CC
PGM# (P#)
A17
DQ1
DQ2
V
SS
15652D-3
18
8
DQ0–DQ7
A0–A17
CE# (E#)
OE# (G#)
15652D-4
Am27X020 3
ORDERING INFORMATION
Standard Pr od ucts
AMD standard products are available in several packages and operating ranges. The order number (Valid Combination) is formed
by a combination of the following:
Valid Combinations
Valid Combinations list configurations planned to be supported in volume for this device. Consult the local AMD sales
office to confirm availability of specific valid combinations and
to check on newly released combinations.
DEVICE NUMBER/DESCRIPTION
Am27X020
2 Megabit (256 K x 8-Bit) CMOS ExpressROM Device
AM27X020
-75 J C
CODE DESIGNATION
Assigned by AMD
TEMPERATURE RANGE
C = Commercial (0°C to +70
°C)
I=Industrial (–40
°C to +85°C)
PACKAGE TYPE
P = 32-Pin Plastic Dual In-Line Package (PD 032)
J = 32-Pin Plastic Leaded Chip Carrier (PL 032)
SPEED OPTION
See Product Selector Guide and Valid Combinations
XXXXX
Valid Combinations
AM27X020-75
PC, JC, PI, JI
AM27X020-90
AM27X020-120
AM27X020-150
AM27X020-200
AM27X020-255
V
CC
= 5.0 V ± 5%
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