FINAL
Am27X040
4 Megabit (512 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
—90 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 VCC + 1 V
■Versatile features for simple interfacing
—Both CMOS and TTL input/output compatibility
—Two line control functions
GENERAL DESCRIPTION
The Am27X040 is a factory programmed and tested OTP EPROM. It is programmed after packaging prior to final test. Every device is rigorously tested under AC and DC operating conditions to your stable code. It is organized as 512 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 alternative to OTP EPROMs and mask programmed ROMs.
Data can be accessed as fast as 90 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
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VCC |
Data Outputs DQ0–DQ7 |
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VSS |
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OE# |
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Output Enable |
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Chip Enable |
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Output |
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CE# |
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and |
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Buffers |
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Prog Logic |
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Y |
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Y |
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A0–A17 |
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Decoder |
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Gating |
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Address |
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2,097,152 |
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Inputs |
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X |
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Bit Cell |
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Decoder |
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Matrix |
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15654D-1
Publication# 15654 Rev: D Amendment/0
Issue Date: May 1998
PRODUCT SELECTOR GUIDE
Family Part Number |
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Am27X040 |
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Speed Options |
VCC = 5.0 V ± 10% |
-90 |
-120 |
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-150 |
-200 |
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Max Access Time (ns) |
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90 |
120 |
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150 |
200 |
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CE# (E#) Access (ns) |
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90 |
120 |
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150 |
200 |
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OE# (G#) Access (ns) |
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40 |
50 |
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65 |
75 |
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CONNECTION DIAGRAMS
Top View
DIP
VPP |
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1 |
32 |
VCC |
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A16 |
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2 |
31 |
A18 |
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A15 |
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3 |
30 |
A17 |
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A12 |
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4 |
29 |
A14 |
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A7 |
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5 |
28 |
A13 |
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A6 |
6 |
27 |
A8 |
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A5 |
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7 |
26 |
A9 |
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A4 |
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8 |
25 |
A11 |
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A3 |
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9 |
24 |
OE# (G#) |
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A2 |
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10 |
23 |
A10 |
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A1 |
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11 |
22 |
CE# (E#) |
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A0 |
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12 |
21 |
DQ7 |
DQ0 |
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DQ6 |
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13 |
20 |
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DQ1 |
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14 |
19 |
DQ5 |
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DQ2 |
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15 |
18 |
DQ4 |
VSS |
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16 |
17 |
DQ3 15654D-2 |
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PLCC |
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A12 |
A15 |
A16 |
PP |
CC |
A18 |
A17 |
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V |
V |
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4 |
3 |
2 |
1 |
32 31 30 |
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A7 |
5 |
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29 |
A14 |
A6 |
6 |
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28 |
A13 |
A5 |
7 |
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27 |
A8 |
A4 |
8 |
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26 |
A9 |
A3 |
9 |
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25 |
A11 |
A2 |
10 |
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24 |
OE# (G#) |
A1 |
11 |
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23 |
A10 |
A0 |
12 |
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22 |
CE# (E#) |
DQ0 |
13 |
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21 |
DQ7 |
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14 15 16 17 18 19 20 |
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DQ1 |
DQ2 |
SS |
DQ3 |
DQ4 |
DQ5 |
DQ6 |
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V |
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15654D-3 |
Notes:.
1. JEDEC nomenclature is in parenthesis.
2. Don’t use (DU) for PLCC.
PIN DESIGNATIONS |
LOGIC SYMBOL |
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A0–A18 |
= |
Address Inputs |
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CE# (E#) |
= |
Chip Enable Input |
19 |
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DQ0–DQ7 |
= |
Data Input/Outputs |
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A0–A18 |
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8 |
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OE# (G#) |
= |
Output Enable Input |
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DQ0–DQ7 |
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VCC |
= |
VCC Supply Voltage |
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CE# (E#) |
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VPP |
= |
Program Voltage Input |
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VSS |
= Ground |
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OE# (G#) |
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NC |
= |
No Internal Connection |
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15654D-4
2 |
Am27X040 |
ORDERING INFORMATION
Standard Products
AMD standard products are available in several packages and operating ranges. The order number (Valid Combination) is formed by a combination of the following:
AM27X040 |
-90 |
J |
C XXXXX |
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
DEVICE NUMBER/DESCRIPTION
Am27X040
2 Megabit (512 K x 8-Bit) CMOS ExpressROM Device
Valid Combinations
AM27X040-90
AM27X040-120
PC, JC, PI, JI
AM27X040-150
AM27X040-200
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.
Am27X040 |
3 |