CY27C256-90WC [CYPRESS]
32K x 8-Bit CMOS EPROM; 32K ×8位CMOS EPROM
| 型号： | CY27C256-90WC |
| 厂家： | 
CYPRESS |
| 描述： | 32K x 8-Bit CMOS EPROM |
| 文件： | 总11页 (文件大小：264K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
1CY27C256
fax id: 3013
CY27C256
32K x 8-Bit CMOS EPROM
able in a CerDIP package equipped with an erasure window
to provide for reprogrammability. When exposed to UV light,
the EPROM is erased and can be reprogrammed. The mem-
ory cells utilize proven EPROM floating gate technology and
byte-wide intelligent programming algorithms.
Features
• Wide speed range
— 45 ns to 200 ns (commercial and military)
• Low power
The CY27C256 offers the advantage of lower power and su-
perior performance and programming yield. The EPROM cell
requires only 12.5V for the super voltage, and low current re-
quirements allow for gang programming. The EPROM cells
allow 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 perfor-
mance to guarantee that after customer programming, the
product will meet both DC and AC specification limits.
— 248 mW (commercial)
— 303 mW (military)
• Low standby power
— Less than 83 mW when deselected
• ±10% Power supply tolerance
Functional Description
Reading the CY27C256 is accomplished by placing active
LOW signals on OE and CE. The contents of the memory location
addressed by the address lines (A - A ) will become available on
The CY27C256 is a high-performance 32,768-word by 8-bit
CMOS EPROM. When disabled (CE HIGH), the CY27C256
automatically powers down into a low-power stand-by mode.
The CY27C256 is packaged in the industry standard 600-mil
DIP, PLCC, and TSOP packages. The CY27C256 is also avail-
0
14
the output lines (O - O ).
0
7
Pin Configurations
Logic Block Diagram
O
7
A
14
A
A
13
DIP/Flatpack
[1]
LCC/PLCC
12
O
6
256 x 1024
PROGRAMABLE
ARRAY
V
1
28
V
PP
CC
ROW
8 x 1 OF 128
MULTIPLEXER
A
11
A
10
ADDRESS
A
2
3
4
5
6
7
8
9
10
11
12
13
14
27
26
A
12
14
4
3 2 323130
1
A
A
8
A
13
7
29
A
6
5
6
7
8
9
10
11
12
13
O
5
A
9
A
A
6
A
A
9
28
27
26
25
24
23
22
21
25
24
5
8
27C256
A
11
A
A
4
A
3
A
A
5
8
9
NC
OE
27C256
A
A
11
23
22
21
A
4
7
A
2
ADDRESS
DECODER
O
4
A
3
A
OE
A
A
10
A
1
6
A
CE
A
2
0
10
A
O
5
NC
O
7
A
1
CE
20
19
18
17
16
O
6
0
A
4
A
0
O
3
O
7
O
14151617 181920
O
A
0
6
3
COLUMN
ADDRESS
O
1
O
5
A
2
27c256–3
O
2
O
O
3
4
O
2
A
GND
15
1
27c256–2
A
0
O
1
POWER–DOWN
O
0
CE
OE
27c256–1
Note:
1. For PLCC only: Pins 1 and 17 are common and tied to the die attach pad. They must therefore be DU (don’t use) for the PLCC package.
Cypress Semiconductor Corporation
•
3901 North First Street
•
San Jose
•
CA 95134
May 1993 – Revised August 1994
•
408-943-2600
CY27C256
Selection Guide
27C256-45 27C256-55 27C256-70 27C256-90 27C256-120 27C256-150 27C256-200
Maximum Access Time (ns)
45
45
55
55
45
55
70
45
55
90
45
55
120
45
150
45
200
45
Maximum
Com’l
Mil
Operating
Current (mA)
55
55
55
Standby Current
(mA)
Com’l
Mil
15
20
45
15
15
20
55
20
15
20
70
25
15
20
90
30
15
20
15
20
15
20
Chip Select Time (ns)
120
30
150
40
200
40
Output Enable Time (ns)
Pin Configurations
28-Pin TSOP
Top View
OE
11
22
23
21
20
19
18
17
A
10
A
CE
24
25
A
O
9
7
O
6
A
8
O
A
13
26
27
5
O
4
A
CC
16
15
14
13
12
11
10
9
14
27C256T
V
28
O
3
V
GND
PP
1
2
O
A
12
2
A
O
1
3
4
5
6
7
7
A
O
6
5
0
A
A
0
A
A
1
4
A
A
2
3
8
27c256–4
32-Pin TSOP
T
op View
32
31
30
NC
A
1
OE
1
2
3
1
9
10
A
CE
A
4
5
29
O
7
8
A
A
28
27
26
25
O
6
3
1
O
5
6
7
NC
O
4
4
A
1
O
3
8
27C256
V
24
23
22
GND
9
CC
P
P
V
O
2
10
11
12
13
14
15
16
NC
2
O
1
A
1
21
20
O
0
7
A
A
NC
6
5
4
3
19
18
A
0
A
A
1
A
A
17
2
A
27c256–5
DC Voltage Applied to Outputs
Maximum Ratings
in High Z State................................................ -0.5V to +7.0V
DC Input Voltage .............................................-3.0V to +7.0V
DC Program Voltage .................................................... 13.0V
(Above which the useful life may be impaired. For user guide-
lines, not tested.)
Storage Temperature ................................. -65°C to +150°C
Static Discharge Voltage ........................................... >2001V
(per MIL-STD-883, Method 3015)
Ambient Temperature with
Power Applied............................................. -55°C to +125°C
Latch-Up Current..................................................... >200 mA
Supply Voltage to Ground Potential................-0.5V to +7.0V
2
UV Exposure ................................................ 7258 Wsec/cm
2
CY27C256
Operating Range
Ambient
Temperature
Range
V
CC
Commercial
0°C to +70°C
-40°C to +85°C
-55°C to +125°C
5V ±10%
5V ±10%
5V ±10%
[2]
Industrial
[3]
Military
[4]
Electrical Characteristics Over the Operating Range
27C256-45, 55, 70, 90,
120, 150, 200
Parameter
Description
Output HIGH Voltage
Output LOW Voltage
Input HIGH Level
Test Conditions
= Min., I = –4.0 mA
OH
Min.
Max.
Unit
V
V
V
V
V
V
2.4
OH
OL
IH
CC
CC
[5]
= Min., I = 16.0 mA
0.4
V
OL
GuaranteedInputLogicalHIGHVoltage for All
Inputs
2.0
V
V
CC
V
Input LOW Level
Guaranteed Input Logical LOW Voltage for All
Inputs
–0.3
0.8
V
IL
I
I
Input Current
GND < V < V
CC
–10
–10
–40
–20
+10
+10
+40
–90
45
µA
µA
IX
IN
Output Leakage Current
GND < V
< V ,
CC
Commercial
Military
OZ
OUT
Output Disabled
[6]
I
I
Output Short Circuit Current
Power Supply Current
V
V
= Max., V = GND
OUT
mA
mA
OS
CC
CC
= Max., V =V ,
Commercial
Military
CC
IN
IH
IL
I
= 0 mA, CE=V ,
OUT
55
OE = V
IH
I
Standby Supply Current
V
= Max., CE = V
IH
Commercial
Military
15
20
13
50
mA
SB
CC
V
Programming Supply Voltage
Programming Supply Current
12
V
mA
V
PP
I
PP
V
Input HIGH Programming
Voltage
3.0
IHP
V
Input LOW Programming
Voltage
0.4
V
ILP
Capacitance[7]
Parameter
Description
Test Conditions
Max.
10
Unit
pF
C
Input Capacitance
T = 25°C, f = 1 MHz,
IN
A
V
= 5.0V
CC
C
Output Capacitance
10
pF
OUT
Notes:
2. Contact a Cypress representative for information on industrial temperature range specifications.
TA is the “instant on” case temperature.
4. See the last page of this specification for Group A subgroup testing information.
5. IOL=12.0 mA for military devices.
3.
6. For test purposes, not more than one output at a time should be shorted. Short circuit test duration should not exceed 30 seconds.
7. See Introduction to CMOS PROMs in this Data Book for general information on testing.
3
CY27C256
AC Test Loads and Waveforms
R1 250Ω (329Ω MIL)
ALL INPUT PULSES
90%
10%
5V
OUTPUT
R1 250Ω (329Ω MIL)
3.0V
GND
5V
90%
10%
OUTPUT
R2 167Ω
(202Ω MIL)
5 pF
R2 167Ω
(202Ω MIL)
30 pF
5 ns
≤
5 ns
≤
INCLUDING
JIG AND
SCOPE
INCLUDING
JIG AND
SCOPE
27c256–6
27c256–7
(b) HighZ Load
(a) NormalLoad
Equivalent to:
THÉVENIN EQUIVALENT
125Ω
100Ω
OUTPUT
[4,7 ]
2.00V
OUTPUT
1.9V
Commercial
Military
Switching Characteristics Over the Operating Range
27C256-45
27C256-55
27C256-70
27C256-90
Parameter
Description
Min. Max. Min. Max. Min. Max. Min. Max. Unit
tAA
Address to Output Valid
45
15
15
20
45
55
20
20
25
55
70
25
25
25
70
90
25
30
25
90
ns
ns
ns
ns
ns
ns
ns
ns
t
t
t
t
t
t
t
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
HZOE
OE
HZCE
ACE
PU
0
0
0
0
0
0
0
0
45
55
70
90
PD
OH
[4, 7]
Switching Characteristics Over the Operating Range
27C256-120
27C256-150
27C256-200
Parameter
tAA
Description
Address to Output Valid
Min.
Max.
120
30
Min.
Max.
Min.
Max.
200
30
Unit
ns
ns
ns
ns
ns
ns
ns
ns
150
30
t
t
t
t
t
t
t
Outpout Enable Inactive to High Z
Output Enable Active to Output Valid
Chip Enable Inactive to High Z
HZOE
OE
30
40
40
30
30
30
HZCE
ACE
PU
Chip Enable Active to Output Valid
Chip Enable Active to Power Up
Chip Enable Inactive to Power Down
Output Hold from Address Change
120
150
200
0
0
0
0
0
0
120
150
200
PD
OH
4
CY27C256
Switching Waveform
t
t
PU
PD
POWER–DOWN CONTROLLED BY CE
50%
I
CC
SUPPLY
CURRENT
50%
A - A
0
14
ADDRESS
OE, CE
t
AA
(t
)
OE
(t
)
HZOE
t
t
ACE
t
OH
HZCE
HIGH Z
O -
0
O
7
PREVIOUS DATA VALID
DATA VALID
27c256–8
within 1 inch of the lamp 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 is the recom-
Erasure Characteristics
2
Wavelengths of light less than 4000 Å begin to erase the
27C256 in the windowed package. For this reason, an opaque
label should be placed over the window if the EPROM is ex-
posed to sunlight or fluorescent lighting for extended periods
of time.
mended maximum dosage.
Programming Modes
Programming support is available from Cypress as well as
from a number of third-party software vendors. For detailed
programming information, including a listing of software pack-
ages, please see the EPROM Programming Information locat-
ed at the end of this section. Programming algorithms can be
obtained from any Cypress representative.
The recommended dose of ultraviolet light for erasure is a
wavelength of 2537 Å for a minimum dose (UV intensity mul-
tiplied by exposure time) of 25 Wsec/cm2. For an ultraviolet
lamp with a 12 mW/cm power rating, the exposure time would
be approximately 35 minutes. The CY27C256 needs to be
2
Table 1. CY27C256 Mode Selection.
[8]
Mode
Pin Function
A
A
A
A
-A
-A
-A
-A
OE
CE
V
X
X
X
O -O
7
14
14
14
14
0
0
0
0
PP
[9]
0
0
Read
V
V
X
V
V
V
O -O
7
IL
IL
IL
IH
Output Disable
Power Down
High Z
High Z
IH
Notes:
8. X can be VIL or VIH
9. VPP should not exceed VCC in read mode.
5
CY27C256
Typical DC and AC Characteristics
NORMALIZED SUPPLY CURRENT
vs. AMBIENT TEMPERATURE
NORMALIZED ACCESS TIME
vs. SUPPLY VOLTAGE
NORMALIZED SUPPLYCURRENT
vs. SUPPLY VOLTAGE
1.3
1.4
1.3
1.2
1.1
1.25
1.2
1.2
1.15
1.1
1.1
1.0
1.05
1.0
0.9
0.8
1.0
0.95
0.9
0.9
0.8
T =25°C
A
f = f
MAX
0.7
0.6
0.85
0.8
0.7
-100
-50
0
50
100
150
4.0
4.5
5.0
5.5
6.0
4.0
4.5
5.0
5.5
6.0
AMBIENT TEMPERATURE (°C)
SUPPLY VOLTAGE (V)
SUPPLY VOLTAGE (V)
OUTPUT SOURCE CURRENT
vs. OUTPUT VOLTAGE
TYPICAL ACCESS TIME CHANGE
vs. OUTPUT LOADING
NORMALIZED ACCESSTIME
vs. TEMPERATURE
1.4
1.3
60
50
40
30
30.0
25.0
20.0
15.0
1.2
1.1
20
10
10.0
5.0
1.0
0.9
0.8
V
=5V
CC
V
=4.5V
CC
T =25°C
A
T =25°C
A
0
0.0
0
1.0
2.0
3.0
4.0
0
200 400
600 800 1000
-100
-50
0
50
100
150
OUTPUT VOLTAGE (V)
CAPACITANCE (pF)
AMBIENT TEMPERATURE (°C)
NORMALIZED SUPPLYCURRENT
vs. ACCESS TIME
OUTPUT SINK CURRENT
vs. OUTPUT VOLTAGE
175
150
1.2
1.15
1.1
125
100
75
1.05
1.0
V
=5.6V
CC
0.95
T =25°C
A
V
=5.0V
CC
0.9
50
T =25°C
A
0.85
25
0
0.8
0.75
0.0
1.0
2.0
3.0
4.0
0
100 200
300 400 500
OUTPUT VOLTAGE(V)
CYCLE TIME(ns)
6
CY27C256
Ordering Information[10]
Speed
Package
Name
Operating
Range
(ns)
Ordering Code
CY27C256-45JC
CY27C256-45PC
CY27C256-45WC
CY27C256-45ZC
CY27C256-45WMB
CY27C256-55JC
CY27C256-55PC
CY27C256-55WC
CY27C256-55ZC
CY27C256-55WMB
CY27C256-70JC
CY27C256-70PC
CY27C256-70WC
CY27C256-70ZC
CY27C256-70WMB
CY27C256-90JC
CY27C256-90PC
CY27C256-90WC
CY27C256-90ZC
CY27C256-90WMB
CY27C256-120JC
CY27C256-120PC
CY27C256-120WC
CY27C256-120ZC
CY27C256-120WMB
CY27C256-150JC
CY27C256-150PC
CY27C256-150WC
CY27C256-150ZC
CY27C256-150WMB
CY27C256-200JC
CY27C256-200PC
CY27C256-200WC
CY27C256-200ZC
CY27C256-200WMB
Package Type
45
J65
P15
W16
Z32
W16
J65
32-Pin Rectangular Plastic Leaded Chip Carrier
28-Lead (600-Mil) Molded DIP
Commercial
28-Lead (600-Mil) Windowed CerDIP
32-Lead Thin Small Outline Package
28-Lead (600-Mil) Windowed CerDIP
32-Pin Rectangular Plastic Leaded Chip Carrier
28-Lead (600-Mil) Molded DIP
Military
55
70
Commercial
P15
W16
Z32
W16
J65
28-Lead (600-Mil) Windowed CerDIP
32-Lead Thin Small Outline Package
28-Lead (600-Mil) Windowed CerDIP
32-Pin Rectangular Plastic Leaded Chip Carrier
28-Lead (600-Mil) Molded DIP
Military
Commercial
P15
W16
Z32
W16
J65
28-Lead (600-Mil) Windowed CerDIP
32-Lead Thin Small Outline Package
28-Lead (600-Mil) Windowed CerDIP
32-Pin Rectangular Plastic Leaded Chip Carrier
28-Lead (600-Mil) Molded DIP
Military
90
Commercial
P15
W16
Z32
W16
J65
28-Lead (600-Mil) Windowed CerDIP
32-Lead Thin Small Outline Package
28-Lead (600-Mil) Windowed CerDIP
32-Pin Rectangular Plastic Leaded Chip Carrier
28-Lead (600-Mil) Molded DIP
Military
120
150
200
Commercial
P15
W16
Z32
W16
J65
28-Lead (600-Mil) Windowed CerDIP
32-Lead Thin Small Outline Package
28-Lead (600-Mil) Windowed CerDIP
32-Pin Rectangular Plastic Leaded Chip Carrier
28-Lead (600-Mil) Molded DIP
Military
Commercial
P15
W16
Z32
W16
J65
28-Lead (600-Mil) Windowed CerDIP
32-Lead Thin Small Outline Package
28-Lead (600-Mil) Windowed CerDIP
32-Pin Rectangular Plastic Leaded Chip Carrier
28-Lead (600-Mil) Molded DIP
Military
Commercial
P15
W16
Z32
W16
28-Lead (600-Mil) Windowed CerDIP
32-Lead Thin Small Outline Package
28-Lead (600-Mil) Windowed CerDIP
Military
Notes:
10. Most of these products are available in industrial temperature range. Contact a Cypress representative for specifications and product availability.
7
CY27C256
Ordering Information (continued)
Speed
Package
Name
Operating
Range
(ns)
Ordering Code
CY27C256T-45WC
CY27C256T-45ZC
CY27C256T-45WMB
CY27C256T-55WC
CY27C256T-55ZC
CY27C256T-55WMB
CY27C256T-70WC
CY27C256T-70ZC
CY27C256T-70WMB
Package Type
28-Lead (300-Mil) Windowed CerDIP
28-Thin Small Outline Package
45
W22
Z28
Commercial
W22
W22
Z28
28-Lead (300-Mil) Windowed CerDIP
28-Lead (300-Mil) Windowed CerDIP
28-Thin Small Outline Package
Military
55
70
Commercial
W22
W22
Z28
28-Lead (300-Mil) Windowed CerDIP
28-Lead (300-Mil) Windowed CerDIP
28-Thin Small Outline Package
Military
Commercial
W22
28-Lead (300-Mil) Windowed CerDIP
Military
MILITARY SPECIFICATIONS
Group A Subgroup Testing
DC Characteristics
Switching Characteristics
Parameter
Subgroups
1, 2, 3
Parameter
Subgroups
7, 8, 9, 10, 11
7, 8, 9, 10, 11
7, 8, 9, 10, 11
V
t
OH
AA
V
1, 2, 3
t
OL
OE
V
1, 2, 3
t
IH
ACE
V
1, 2, 3
IL
Document #: 38-00245-D
I
1, 2, 3
IX
I
1, 2, 3
OZ
CC
I
1, 2, 3
I
1, 2, 3
SB
8
CY27C256
Package Diagrams
32-Lead Plastic Leaded Chip Carrier J65
28-Lead (600-Mil) Molded DIP P15
9
CY27C256
Package Diagrams (Continued)
28-Lead (600-Mil) Windowed CerDIP W16
MIL-STD-1835
D-10 Config.A
28-Lead Thin Small Outline Package Z28
10
CY27C256
Package Diagrams (Continued)
32-Lead Thin Small Outline Package Z32
© Cypress Semiconductor Corporation, 1994. The information contained herein is subject to change without notice. Cypress Semiconductor Corporation assumes no responsibility for the use
of anycircuitry other than circuitry embodied in a CypressSemiconductor product. Nor does it conveyor imply any license under patent or other rights. CypressSemiconductor does not authorize
its products for use as critical components in life-support systems where a malfunction or failure may reasonably be expected to result in significant injury to the user. The inclusion of Cypress
Semiconductor products in life-support systems application implies that the manufacturer assumes all risk of such use and in doing so indemnifies Cypress Semiconductor against all charges.
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Multi-Output, Sequence Selectable Power-Supply Controller for Mobile ApplicationsWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
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VISHAY
SI9137DB
Multi-Output, Sequence Selectable Power-Supply Controller for Mobile ApplicationsWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
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VISHAY
SI9137LG
Multi-Output, Sequence Selectable Power-Supply Controller for Mobile ApplicationsWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
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VISHAY
SI9122E
500-kHz Half-Bridge DC/DC Controller with Integrated Secondary Synchronous Rectification DriversWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
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VISHAY
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