AMD Am27C128 Service Manual
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FINAL
Am27C128
128 Kilobit (16 K x 8-Bit) CMOS EPROM
DISTINCTIVE CHARACTERISTICS
■ Fast access time
— Speed options as fast as 45 ns
■ Low power consumption
— 20 µA typical CMOS standby current
■ JEDEC-approved pinout
■ Single +5 V power supply
■ ±10% power supply tolerance standard
■ 100% Flashrite™ programming
— Typical programming time of 2 seconds
■ Latch-up protected to 100 mA from –1 V to
+ 1 V
V
CC
■ High noise immunity
■ Versatile features for simple interfaci ng
— B oth CMOS and TTL input/output compatibility
— Two line control functions
■ Standard 28-pin DIP, PDIP, and 32-pin PLCC
packages
GENERAL DESCRIPTION
The Am27C128 is a 128-Kbit, ultraviolet erasable programmable read-only memory. It is organized as 16
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 45 ns, allowing high-p erformance m icroproces sors to ope rate
without any WAIT states. The device offers separate
Output Enable (OE#) and Chip Enable (CE#) controls,
BLOCK DIAGRAM
V
CC
V
SS
V
PP
OE#
CE#
PGM#
Output Enable
Chip Enable
and
Prog Logic
thus eliminating bus contention in a mul tiple bus microprocessor system.
AMD’s CMOS process technology provides high
speed, low power, and high noise immunity. Typ ical
power consumption is only 80 mW in active mode, and
100 µW in standby mode.
All signals are TTL levels, including programming signals. Bit locations may be programmed singly, in
blocks, or at random. The device supports AMD’s
Flashrite programming alg orithm (100 µs pulses), resulting in a typical programming time of 2 seconds.
Data Outputs
DQ0–DQ7
Output
Buffers
A0–A13
Address
Inputs
Y
Decoder
X
Decoder
Y
Gating
131,072
Bit Cell
Matrix
Publication# 11420 Rev: E Amendment/0
Issue Date: May 1998
11420E-1
PRODUCT SELECTOR GUIDE
Family Part Number Am27C128
= 5.0 V ± 5% -255
V
Speed Options
Max Access Time (ns) 45 55 70 90 120 150 200 250
CE# (E#) Access (ns) 45 55 70 90 120 150 200 250
OE# (G#) Access (ns) 30 35 40 40 50 50 50 50
CC
= 5.0 V ± 10% -45 -55 -70 -90 -120 -150 -200
V
CC
CONNECTION DIAGRAMS
Top View
DIP PLCC
28
27
26
25
24
23
22
21
20
19
18
17
16
15
V
CC
PGM# (P#)
A13
A8
A9
A11
OE# (G#)
A10
CE # (E#)
DQ7
DQ6
DQ5
DQ4
DQ3
11420E-2
A6
A5
A4
A3
A2
A1
A0
NC
DQ0
5
6
7
8
9
10
11
12
13
14
A7
15
DQ1
A12
DQ2
PP
CC
PGM# (P#)
DU
V
13130234
32
17
18
SS
DU
V
V
19 2016
DQ3
DQ4
A13
29
28
27
26
25
24
23
22
21
DQ5
A8
A9
A11
NC
OE# (G#)
A10
CE# (E#)
DQ7
DQ6
11420E-3
V
PP
A12
A7
A6
A5
A4
A3
A2
A1
A0
DQ0
DQ1
DQ2
V
SS
1
2
3
4
5
6
7
8
9
10
11
12
13
14
Notes:
1. JEDEC nomenclature is in parenthesis.
2. Don’t use (DU) for PLCC.
PIN DESIGNATIONS
LOGIC SYMBOL
A0–A13 = Address Inputs
CE# (E#) = Chip Enable Input
DQ0–DQ7 = Data Input/Outputs
OE# (G#) = Output Enable Input
PGM# (P#) = Program Enable Input
V
CC
V
PP
V
SS
=VCC Supply Voltage
= Program Voltage Input
= Ground
NC = No Internal Connection
2 Am27C128
14
A0–A13
CE# (E#)
PMG# (P#)
OE# (G#)
8
DQ0–DQ7
11420E-4
ORDERING INFORMATION
UV EPROM 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:
AM27C128 -45 D C
DEVICE NUMBER/DESCRIPTION
Am27C128
128 Kilobit (16 K x 8-Bit) CMOS UV EPROM
B
OPTIONAL PROCESSING
Blank = Standard Processing
B = Burn-In
TEMPERATURE RANGE
C = Commercial (0°C to +70
I=Industrial (–40
E = Extended (–55°C to +125°C)
PACKAGE TYPE
D = 28-Pin Ceramic DIP (CDV028)
SPEED OPTION
See Product Selector Guide and Valid Combinations
°C to +85°C)
°C)
AM27C128-45
AM27C128-55
AM27C128-70
AM27C128-90
AM27C128-120
AM27C128-150
AM27C128-200
AM27C128-255
= 5.0 V ± 5%
V
CC
Valid Combinations
DC, DCB, DI, DIB
DC, DCB, DI, DIB, DE, DEB
DC, DCB, DI, DIB
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.
Am27C128 3
ORDERING INFORMATION
OTP EPROM 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:
AM27C128 -55 P C
OPTIONAL PROCESSING
Blank = Standard Processing
TEMPERATURE RANGE
C = Commercial (0
I=Industrial (–40
PACKAGE TYPE
P = 28-Pin Plastic DIP (PD 028)
J = 32-Pin Plastic Leaded Chip Carrier (PL 032)
SPEED OPTION
See Product Selector Guide and Valid Combinations
°C to +70°C)
°C to +85°C)
AM27C128-55
AM27C128-70
AM27C128-90
AM27C128-120
AM27C128-150
AM27C128-200
AM27C128-255
Valid Combinations
JC, PC, JI, PI
DEVICE NUMBER/DES CR IP TIO N
Am27C128
128 Kilobit (16 K x 8-Bit) CMOS OTP EPROM
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.
4 Am27C128
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