CY27C128 automatically powers down
into a low power stand by mode. The
D
Wide speed range
CY27C128 is packaged in the industry
45 ns to 200 ns (commercial and
standard 600 mil DIP and LCC packages.
military)
The CY27C128 is also available in a Cer
D
Low power
DIP package equipped with an erasure
window to provide for reprogrammability.
248 mW (commercial)
When exposed to UV light, the EPROM
303 mW (military)
is erased and can be reprogrammed. The
D
Low standby power
cells utilize
Less than 83 mW when deselected
memorygate technologyproven EPROM
floating
and byte wide in
D
±10% Power supply tolerance
telligent programming algorithms.
Functional Description
The CY27C128 offers the advantage of
performance
The CY27C128 is a high performance lower power and superior EPROM cell and
programming yield. The
re
16,384 word by 8 bit CMOS EPROM. quires only 12.5V for the super voltage,
When disabled (CE HIGH), the
Features
128K (16K x 8 Bit) CMOS EPROM
CY27C128
and low current requirements allow for
gang programming. The EPROM cells al
low each memory location to be tested
100% because each location is written
into, erased, and repeatedly exercised
prior to encapsulation. Each EPROM is
also tested for AC performance to guar
antee that after customer programming,
the product will meet both DC and AC
specification limits.
Reading the CY27C128 is accomplished
by placing active LOW signals on OE and
CE. The contents of the memory location
addressed by the address lines (A
0
- A
13
)
will become available on the output lines
(O
0
- O
7
).
Logic Block Diagram
A
13
A
12
A
11
A
10
A
9
A
8
A
7
A
6
A
5
A
4
A
3
COLUMN
A
2
A
1
A
0
ADDRESS
O
5
ROW
ADDRESS
128 x 1024
PROGRAMABLE
ARRAY
8 x 1 OF 128
MULTIPLEXER
O
7
O
6
V
PP
A
12
A
7
A
6
A
5
A
4
O
4
A
3
A
2
A
1
O
3
A
0
O
0
O
1
O
2
O
2
GND
1
2
3
4
5
6
7
8
9
10
11
12
13
14
Pin Configurations
DIP/Flatpack
28
27
26
25
24
27C128
23
22
21
20
19
18
17
16
15
V
CC
PGM
A
13
A
8
A
9
A
11
OE
A
10
CE
O
7
O
6
O
5
O
4
O
3
C128 2
O
1
POWER DOWN
A
6
A
5
A
4
A
3
A
2
A
1
A
0
NC
O
0
5
6
7
8
9
10
11
12
13
27C128
LCC/PLCC
[1]
V
PP
V
CC
PGM
A 12
A7
4
3
2
1 32 31 30
29
28
27
26
25
24
23
22
21
A
8
A
9
A
11
NC
OE
A
10
CE
O
7
O
6
ADDRESS
DECODER
14 15 16 17 1819 20
GND
DU
1
2
3
4
O
5
O
O
O
O
A 13
DU
C128 3
O
0
CE
OE
C128 1
Selection Guide
27C128-45 27C128-55 27C128-70 27C128-90 27C128-120 27C128-150 27C128-200
Maximum Access Time (ns)
45
55
70
90
120
150
200
Maximum
45
45
45
45
45
45
45
Operating
[2]
Com'l
55
55
55
55
55
55
55
Mil
Current (mA)
15
15
15
15
15
15
15
Standby Current Com'l
(mA)
( A)
20
20
20
20
20
20
20
Mil
Chip Select Time (ns)
45
55
70
90
120
150
200
Output Enable Time (ns)
15
20
25
30
30
40
40
Notes:
1. For PLCC only: Pins 1 and 17 are common and tied to the die attach 2. Add 2 mA/MHz for AC power component.
pad. They must therefore be DU (don't use) for the PLCC package.
Cypress Semiconductor Corporation
D
3901 North First Street
1
D
San Jose
D
CA 95134
D
408-943-2600
February 1994
CY27C128
Maximum Ratings
(Above which the useful life may be impaired. For user guidelines,
not tested.)
Storage Temperature . . . . . . . . . . . . . . . . . . -65
_
C to +150
_
C
Ambient Temperature with
Power Applied . . . . . . . . . . . . . . . . . . . . . . . - 55
_
C to +125
_
C
Supply Voltage to Ground Potential . . . . . . . . - 0.5V to +7.0V
DC Voltage Applied to Outputs
in High Z State . . . . . . . . . . . . . . . . . . . . . . . . . - 0.5V to +7.0V
DC Input Voltage . . . . . . . . . . . . . . . . . . . . . . . -3.0V to +7.0V
DC Program Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13.0V
Static Discharge Voltage . . . . . . . . . . . . . . . . . . . . . . . . >2001V
(per MIL STD 883, Method 3015)
Electrical Characteristics
Latch Up Current . . . . . . . . . . . . . . . . . . . . . . . . . . . >200 mA
UV Exposure . . . . . . . . . . . . . . . . . . . . . . . . . . . 7258 Wsec/cm
2
Operating Range
Ambient
Range
Temperature
V
CC
Commercial
Industrial
[3]
Military
[4]
0
_
C to +70
_
C
-40
_
C to +85
_
C
-55
_
C to +125
_
C
5V ±10%
5V ±10%
5V ±10%
Over the Operating Range
[5]
27C128-45, 55, 70, 90,
120, 150, 200
Parameter
Description
Test Conditions
Min.
Max.
Unit
V
OH
V
OL
V
IH
V
IL
I
IX
I
OZ
I
OS
I
CC
Output HIGH Voltage
Output LOW Voltage
Input HIGH Level
Input LOW Level
Input Current
Output Leakage Current
Output Short Circuit Current
[7]
Power Supply Current
[2]
V
CC
= Min., I
OH
= - 4.0 mA
V
CC
= Min., I
OL
= 16.0 mA
[6]
Guaranteed Input Logical HIGH Voltage for
All Inputs
Guaranteed Input Logical LOW Voltage for
All Inputs
GND < V
IN
< V
CC
GND < V
OUT
< V
CC
,
Output Disabled
V
CC
= Max., V
OUT
= GND
V
CC
= Max., V
IN
=V
IH
,
I
OUT
= 0 mA, CE=V
IL
,
OE = V
IH
V
CC
= Max., CE = V
IH
Commercial
Military
Commercial
Military
Commercial
Military
2.4
0.4
2.0
-0.3
-10
-10
-40
-20
V
CC
0.8
+10
+10
+40
-90
45
55
15
20
12
3.0
0.4
13
50
V
V
V
V
m
A
m
A
mA
mA
I
SB
V
PP
I
PP
V
IHP
V
ILP
Standby Supply Current
mA
Programming Supply Voltage
Programming Supply Current
Input HIGH Programming
Voltage
Input LOW Programming
Voltage
[8]
Description
Test Conditions
V
mA
V
V
Capacitance
Parameter
Max.
Unit
C
IN
C
OUT
Notes:
Input Capacitance
Output Capacitance
T
A
= 25
_
C, f = 1 MHz,
V
CC
= 5.0V
5 0V
6
7.
8.
10
10
pF
pF
3.
4.
5.
Contact a Cypress representative for information on industrial tem
perature range specifications.
T
A
is the instant on" case temperature.
See the last page of this specification for Group A subgroup testing in
formation.
I
OL
=12.0 mA for military devices.
For test purposes, not more than one output at a time should be
shorted. Short circuit test duration should not exceed 30 seconds.
See Introduction to CMOS PROMs in this Data Book for general in
formation on testing.
2
CY27C128
AC Test Loads and Waveforms
R1 250
5V
OUTPUT
30 pF
INCLUDING
JIG AND
SCOPE
R2 167
(202
W
(329
W
R1 250
MIL)
5V
OUTPUT
W
(329
W
MIL)
3.0V
ALL INPUT PULSES
90%
10%
GND
< 5 ns
< 5 ns
90%
10%
W
W
JIG AND
SCOPE
R2 167
5 pF
INCLUDING
C128 4
(202
W
W
MIL
MIL
C128 5
(a) Normal Load
(b) High Z Load
Equivalent to:
THÉVENIN EQUIVALENT
100
OUTPUT
W
125
2.00 V
OUTPUT
W
1.9 V
Commercial
Military
Switching Characteristics
Over the Operating Range
[4, 7]
27C128-45
Parameter
t
AA
t
HZOE
t
OE
t
HZCE
t
ACE
t
PU
t
PD
t
OH
27C128-
55
Min.
Max.
55
20
20
25
55
0
27C128-70
Min.
Max.
70
25
25
25
70
0
27C128-90
Min.
Max.
90
25
30
25
90
0
Description
Address to Output Valid
Outpout Enable Inactive to High Z
Output Enable Active to Output Valid
Chip Enable Inactive to High Z
Chip Enable Active to Output Valid
Chip Enable Active to Power Up
Chip Enable Inactive to Power Down
Output Hold from Address Change
Min.
Max.
45
15
15
20
45
Unit
ns
ns
ns
ns
ns
ns
0
45
0
55
0
0
70
0
90
ns
ns
Switching Characteristics
Over the Operating Range
[4, 7]
(continued)
27C128-120
Parameter
t
AA
t
HZOE
t
OE
t
HZCE
t
ACE
t
PU
t
PD
t
OH
27C128-150
Min.
Max.
150
30
40
30
150
0
27C128-200
Min.
Max.
200
30
40
30
200
0
Description
Address to Output Valid
Outpout Enable Inactive to High Z
Output Enable Active to Output Valid
Chip Enable Inactive to High Z
Chip Enable Active to Output Valid
Chip Enable Active to Power Up
Chip Enable Inactive to Power Down
Output Hold from Address Change
Min.
Max.
120
30
30
30
120
Unit
ns
ns
ns
ns
ns
ns
0
120
0
150
0
0
200
ns
ns
3
CY27C128
Switching Waveform
I
CC
SUPPLY
CURRENT
50%
50%
t
PD
t
PU
POWER DOWN CONTROLLED BY CE
A
0
- A
13
ADDRESS
OE, CE
t
AA
t
OH
(t
HZOE
)
t
HZCE
(t
OE
)
t
ACE
HIGH Z
O
0
- O
7
PREVIOUS DATA VALID
DATA VALID
Erasure Characteristics
Wavelengths of light less than 4000 Å begin to erase the 27C128
in the windowed package. For this reason, an opaque label should
be placed over the window if the EPROM is exposed to sunlight
or fluorescent lighting for extended periods of time.
The recommended dose of ultraviolet light for erasure is a wave
length of 2537 Å for a minimum dose (UV intensity multiplied by
exposure time) of 25 Wsec/cm
2
. For an ultraviolet lamp with a 12
mW/cm
2
power rating, the exposure time would be approximately
35 minutes. The CY27C128 needs to be within 1 inch of the lamp
C128 6
Programming Modes
during erasure. Permanent damage may result if the EPROM is
exposed to high intensity UV light for an extended period of
time. 7258 Wsec/cm
2
is the recommended maximum dosage.
Mode
Read
Output Disable
Power Down
Table 1. CY27C128 Mode Selection
Pin Function
A
13
- A
0
OE
CE
V
PP
[9]
Programming support is available from Cypress as well as from a
number of third party software vendors. For detailed program
ming information, including a listing of software packages, please
see the EPROM Programming Information located at the end of
this section. Programming algorithms can be obtained from any
Cypress representative.
PGM
Note 10
Note 10
Note 10
O
7
- O
0
O
7
- O
0
High Z
High Z
A
13
- A
0
A
13
- A
0
A
13
- A
0
V
IL
V
IH
X
V
IL
X
V
IH
X
X
X
Notes:
9.
X must be either V
IL
or V
IH.
10. X must be either V
IL
or V
IH
(must not switch).
4
CY27C128
T
ypical DC and AC Characteristics
NORMALIZED SUPPLY CURRENT
vs. SUPPLY VOLTAGE
NORMALIZED SUPPLY CURRENT
vs. AMBIENT TEMPERATURE
NORMALIZED ACCESS TIME
vs. SUPPLY VOLTAGE
1.4
1.3
NORMALIZED I
CC
1.2
1.1
1.0
0.9
0.8
0.7
0.6
4.0
4.5
5.0
5.5
6.0
NORMALIZED I
CC
1.3
NORMALIZED ACCESS TIME
-50
0
50
100
150
1.25
1.2
1.15
1.1
1.05
1.0
0.95
0.9
0.85
0.8
4.0
4.5
5.0
5.5
6.0
1.2
1.1
1.0
0.9
T
A
= 25 C
f = f
MAX
_
0.8
0.7
-100
SUPPLY VOLTAGE (V)
AMBIENT TEMPERATURE ( C)
_
SUPPLY VOLTAGE (V)
NORMALIZED ACCESS TIME
OUTPUT SOURCE CURRENT
TYPICAL ACCESS TIME CHANGE
vs. OUTPUT LOADING
OUTPUT SOURCE CURRENT (mA)
vs. TEMPERATURE
vs. OUTPUT VOLTAGE
1.4
NORMALIZED ACCESS TIME
60
30.0
1.3
50
(ns)
DELTA t
V
CC
= 5V
T
A
= 25 C
AA
25.0
1.2
40
20.0
1.1
30
15.0
1.0
20
10.0
V
CC
= 4.5V
T
A
= 25 C
0.0
0.9
10
_
5.0
_
0.8
-100
-50
0
50
100
150
0
0
1.0
2.0
3.0
4.0
0
200
400
600
800
1000
AMBIENT TEMPERATURE ( C)
_
OUTPUT VOLTAGE (V)
CAPACITANCE (pF)
OUTPUT SINK CURRENT
vs. OUTPUT VOLTAGE
NORMALIZEDSUPPLY CURRENT
vs. ACCESS TIME
OUTPUT SINK CURRENT (mA)
175
150
NORMALIZED I
CC
1.2
1.15
1.1
1.05
1.0
0.95
0.9
0.85
0.8
V
CC
= 5.6V
T
A
= 25 C
125
100
75
V
CC
= 5.0V
50
25
0
0.0
1.0
2.0
3.0
4.0
T
A
= 25 C
_
_
0.75
0
100
200
300
400
500
OUTPUT VOLTAGE (V)
CYCLE TIME (ns)
5
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