CY7C271 [CYPRESS]
32K x 8 Power Switched and Reprogrammable PROM; 32K ×8电源开关和可重复编程的PROM
| 型号： | CY7C271 |
| 厂家： | 
CYPRESS |
| 描述： | 32K x 8 Power Switched and Reprogrammable PROM |
| 文件： | 总11页 (文件大小：240K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
1CY7C274
CY7C271
CY7C274
32K x 8 Power Switched and
Reprogrammable PROM
low-power stand-by mode. The CY7C271 is packaged in the
300-mil slim package. The CY7C274 is packaged in the
industry standard 600-mil package. Both the CY7C271 and
CY7C274 are available in a cerDIP package equipped with an
erasure window to provide for reprogrammability. When
exposed to UV light, the PROM is erased and can be repro-
grammed. The memory cells utilize proven EPROM floating
gate technology and byte-wide intelligent programming
algorithms.
Features
• CMOS for optimum speed/power
• Windowed for reprogrammability
• High speed
— 30 ns (Commercial)
— 35 ns (Military)
• Low power
The CY7C271 and CY7C274 offer the advantage of lower
power, superior performance, and programming yield. The
EPROM cell requires only 12.5V for the super voltage, and low
current requirements 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 PROM is also tested
for AC performance to guarantee that after customer
programming, the product will meet DC and AC specification
limits.
— 660 mW (commercial)
— 715 mW (military)
• Super low standby power
— Less than 165 mW when deselected
• EPROM technology 100% programmable
• Slim 300-mil package (7C271)
• Direct replacement for bipolar PROMs
• Capable of withstanding >2001V static discharge
Reading the 7C271 is accomplished by placing active LOW
signals on CS1 and CE, and an active HIGH on CS2. Reading the
7C274 is accomplished by placing active LOW signals on OE and
CE. The contents of the memory location addressed by the address
lines (A0−A14) will become available on the output lines (O0−O7).
Functional Description
The CY7C271 and CY7C274 are high-performance
32,768-word by 8-bit CMOS PROMs. When disabled (CE
HIGH), the 7C271/7C274 automatically powers down into a
Pin Configurations
Logic Block Diagram
DIP/Flatpack
DIP/Flatpack
V
V
CC
1
28
1
28
A
V
PP
CC
O
O
O
9
7
6
5
A
14
A
10
A
11
A
12
A
13
A
14
A
A
A
A
A
2
27
26
2
27
26
A
8
A
12
14
13
8
A
A
13
3
3
A
7
A
7
12
X ADDRESS
A
4
A
6
4
25
24
23
22
21
25
24
23
22
21
6
256 x 1024
8 x 1 OF 128
MULTIPLEXER
A
11
A
10
A
5
5
A
5
5
9
PROGRAMABLE
ARRAY
7C274
7C271
A
4
6
A
4
6
11
A
A
3
CS
OE
7
7
3
1
A
9
A
A
2
A
10
8
8
CS
2
2
A
8
A
1
A
1
CE
9
9
20
19
18
17
16
20
19
18
17
16
CE
A
7
A
0
A
0
10
11
12
13
10
11
12
13
O
O
O
O
7
7
O
4
O
3
A
O
O
O
O
6
0
6
0
6
O
O
O
O
5
O
4
O
3
1
1
5
4
3
A
5
O
2
O
2
A
4
14
14
GND
GND
15
15
A
3
Y ADDRESS
A
2
LCC/PLCC (Opaque Only) LCC/PLCC (Opaque Only)
O
O
2
A
1
4
4
3
A
0
3
2
3231 30
2
323130
1
1
A
A
A
NC
CS
CS
CE
A
8
12
13
14
29
29
A
A
A
A
6
6
5
5
6
7
8
5
6
7
8
1
A
A
9
28
27
26
25
24
23
22
21
28
27
26
25
24
23
22
21
5
POWER-DOWN
7C271
7C274
A
11
A
4
4
NC
OE
A
A
3
3
A
A
2
1
2
2
9
9
O
0
A
10
A
A
1
1
10
11
12
13
10
11
12
13
A
A
CE
0
0
CE
(7C271) CS
O
O
6
O
7
NC
O
NC
7
1
O
6
O
0
0
(7C271) CS
2
14151617 181920
14151617 181920
(7C274) OE
Cypress Semiconductor Corporation
Document #: 38-04008 Rev. *B
•
3901 North First Street
•
San Jose
•
CA 95134
•
408-943-2600
Revised December 27, 2002
CY7C271
CY7C274
Selection Guide
7C271-35
7C274-35
7C271-45
7C274-45
7C274-30
30
7C271-55
55
Unit
ns
Maximum Access Time
35
120
130
30
45
120
130
30
Maximum Operating Com’l
120
120
mA
mA
mA
mA
Current
Military
130
Standby Current
Com’l
30
30
Military
40
40
40
Maximum Ratings[1]
DC Program Voltage .................................................... 13.0V
Static Discharge Voltage............................................ >2001V
(per MIL-STD-883, Method 3015)
(Above which the useful life may be impaired. For user guide-
lines, not tested.)
Latch-Up Current..................................................... >200 mA
UV Exposure ................................................ 7258 Wsec/cm2
Storage Temperature ..................................... −65°C to +150°C
Ambient Temperature with
Power Applied..................................................−55°C to +125°C
Operating Range
Supply Voltage to Ground Potential .................−0.5V to +7.0V
Ambient
DC Voltage Applied to Outputs
in High Z State .....................................................−0.5V to +7.0V
Range
Commercial
Military[2]
Temperature
VCC
0°C to +70°C
5V ±10%
5V ±10%
DC Input Voltage .................................................−3.0V to +7.0V
Electrical Characteristics Over the Operating Range[3]
−55°C to +125°C
7C271- 35, 45, 55
7C274-30, 35, 45,
Parameter
VOH
Description
Output HIGH Voltage
Output LOW Voltage
Input HIGH Level
Test Conditions
Min.
Max.
Unit
V
VCC = Min., IOH = −2.0 mA
VCC = Min., IOL = 8.0 mA[4]
2.4
VOL
0.4
V
VIH
GuaranteedInputLogicalHIGH Voltagefor All
Inputs
2.0
VCC
V
VIL
Input LOW Level
Guaranteed Input Logical LOW Voltage for All
Inputs
0.8
V
IIX
Input Current
GND < VIN < VCC
−10
−40
−20
+10
+40
−90
120
130
30
µA
µA
IOZ
IOS
ICC
Output Leakage Current
Output Short Circuit Current[5] VCC = Max., VOUT = GND
GND < VOUT < VCC, Output Disabled
mA
mA
Power Supply Current
VCC = Max., VIN = 2.0V,
IOUT = 0 mA, CE=VIL
Commercial
Military
ISB
Standby Supply Current
VCC = Max., CE = VIH,
IOUT = 0 mA
Commercial
Military
mA
40
VPP
IPP
Programming Supply Voltage
Programming Supply Current
12
13
V
mA
V
50
VIHP
Input HIGH Programming
Voltage
3.0
VILP
Input LOW Programming
Voltage
0.4
V
Notes:
1. The voltage on any input or I/O pin cannot exceed the power pin during power-up.
2. TA is the “instant on” case temperature.
3. See the last page of this specification for Group A subgroup testing information.
4. 6.0 mA military
5. For test purposes, not more than one output at a time should be shorted. Short circuit test duration should not exceed 30 seconds.
Document #: 38-04008 Rev. *B
Page 2 of 11
CY7C271
CY7C274
Capacitance[6]
Parameter
CIN
Description
Input Capacitance
Output Capacitance
Test Conditions
Max.
10
Unit
pF
TA = 25°C, f = 1 MHz,
VCC = 5.0V
COUT
10
pF
AC Test Loads and Waveforms[6]
R1 500Ω
658Ω MIL
R1 500Ω
658Ω MIL
5V
5V
ALL INPUT PULSES
3.0V
GND
OUTPUT
90%
10%
OUTPUT
90%
10%
R2 333Ω
(403Ω MIL)
R2 333Ω
(403Ω MIL)
30 pF
5 pF
≤
≤
5 ns
5 ns
INCLUDING
JIG AND
SCOPE
INCLUDING
JIG AND
SCOPE
(a) Normal Load
(b) HighZ Load
Equivalent to: THÉVENIN EQUIVALENT
200Ω
250Ω
OUTPUT
2.00V COMMERCIAL
OUTPUT
1.90V MILITARY
Switching Characteristics Over the Operating Range[3,6]
7C271-35
7C274-35
7C271-45
7C274-45
7C274-30
7C271-55
Parameter
tAA
Description
Address to Output Valid
Min. Max. Min. Max. Min. Max. Min. Max. Unit
30
20
35
25
45
30
55
30
ns
ns
tHZCS
Chip Select Inactive to High Z (CS1 and CS2,
7C271 Only)
tACS
tHZOE
tOE
Chip Select Active to Output Valid (CS1 and CS2,
7C271 Only)
20
20
20
25
20
20
30
25
25
30
25
25
ns
ns
ns
Output Enable Inactive to High Z (OE, 7C274
Only)
Output Enable Active to Output Valid (OE, 7C274
Only)
tHZCE
tACE
tPU
Chip Enable Inactive to High Z (CE Only)
Chip Enable Active to Output Valid (CE Only)
Chip Enable Active to Power Up
35
35
40
40
50
50
60
60
ns
ns
ns
ns
ns
0
0
0
0
0
0
0
0
tPD
Chip Enable Inactive to Power Down
Output Hold from Address Change
35
40
50
60
tOH
Note:
6. See Introduction to CMOS PROMs for general information on testing.
Document #: 38-04008 Rev. *B
Page 3 of 11
CY7C271
CY7C274
Switching Waveform
t
t
PU
PD
POWER-DOWN CONTROLLED BY CE
50%
V
CC
SUPPLY
CURRENT
50%
A − A
0
14
ADDRESS
CS
2
[7]
OE, CE, CS
1
t
AA
(t
)
OE
(t
)
HZOE
t
t
ACS(E)
t
OH
HZCS(E)
HIGH Z
O -
0
O
7
PREVIOUS DATA VALID
DATA VALID
Note:
7. CS2 and CS1 are used on the 7C271 only. OE is used on the 7C274 only.
inch of the lamp during erasure. Permanent damage may result if the
PROM is exposed to high-intensity UV light for an extended period of
time. 7258 Wsec/cm2 is the recommended maximum dosage.
Erasure Characteristics
Wavelengths of light less than 4000 angstroms begin to erase
the CY7C271 and CY7C274 in the windowed package. For
this reason, an opaque label should be placed over the window
if the PROM is exposed to sunlight or fluorescent lighting for
extended periods of time.
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
packages, please see the PROM Programming Information
located 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 angstroms for a minimum dose (UV
intensity × exposure time) of 25 Wsec/cm2. For an ultraviolet lamp
with a 12 mW/cm2 power rating, the exposure time would be approx-
imately 35 minutes. The CY7C271 or CY7C274 needs to be within 1
Table 1. CY7C271 Mode Selection
Pin Function[8]
Read or Output Disable
Other
A14–A0
A14–A0
A14–A0
A14–A0
A14–A0
A14–A0
A14–A0
A14–A0
A14–A0
A14–A0
CE
VFY
VIL
CS2
PGM
VIH
CS1
VPP
VIL
O7–O0
D7–D0
O7–O0
High Z
High Z
High Z
D7–D0
O7–O0
High Z
O7–O0
Mode
Read
Power Down
VIH
X
X
X
Output Disable
Output Disable
Program
VIL
X
X
X
VIH
VPP
VPP
VPP
VPP
VIHP
VILP
VIHP
VILP
VILP
Program Verify
Program Inhibit
Blank Check
VIHP/VILP
VIHP
VIHP/VILP
Document #: 38-04008 Rev. *B
Page 4 of 11
CY7C271
CY7C274
Table 2. CY7C274 Mode Selection
Read or Output Disable
Pin Function[8]
A14–A0
A14–A0
A14–A0
A14–A0
A14–A0
A14–A0
A14–A0
A14–A0
A14–A0
OE
VFY
VIL
CE
PGM
VIL
VPP
VPP
Note 9
X
O7–O0
D7–D0
O7–O0
High Z
High Z
D7–D0
O7–O0
High Z
O7–O0
Mode
Read
Other
Output Disable
Power Down
Program
VIH
X
X
VIH
X
VIHP
VILP
VIHP
VILP
VILP
VPP
VPP
VPP
VPP
Program Verify
Program Inhibit
VIHP/VILP
VIHP
Blank Check
VIHP/VILP
Note:
8. X can be VIL (VILP) or VIH (VIHP).
9. VPP should be tied to VCC ±5% in read mode.
DIP
Top View
LCC
Top View
1
28
27
26
A
V
CC
9
2
3
A
8
A
10
A
11
4
3
2
323130
1
A
7
A
29
A
A
A
6
12
13
14
5
6
7
8
A
4
25
24
23
22
21
6
A
A
12
A
5
4
28
27
26
25
24
23
22
21
5
A
5
A
13
7C271
7C271
A
6
A
4
3
A
V
NC
14
A
2
V
A
3
7
8
PP
9
PP
A
1
A
0
PGM
VFY
D
7
A
2
10
11
12
13
PGM
A
1
9
20
19
18
17
16
VFY
NC
A
0
10
11
12
13
14
D
7
D
6
D
D
0
6
D
0
D
1
D
2
14151617 181920
D
5
D
4
GND
D
3
15
DIP
LCC
Top View
Top View
1
28
27
26
V
V
CC
PP
2
3
A
A
A
A
A
12
14
13
8
4
3
2
323130
1
7
A
6
29
A
8
4
25
24
23
22
21
6
5
6
7
8
A
A
A
A
5
28
27
26
25
24
23
22
21
9
5
A
5
9
A
4
7C274
7C274
A
11
6
A
A
4
A
11
3
NC
VFY
A
2
A
A
7
3
VFY
9
A
1
A
0
A
10
8
A
10
2
10
11
12
13
PGM
A
9
20
19
18
17
16
PGM
1
NC
D
7
A
0
10
11
12
13
D
7
D
6
D
0
D
D
D
6
D
5
0
14151617 181920
1
D
2
D
4
GND
14
D
3
15
Figure 1. Programming Pinouts
Document #: 38-04008 Rev. *B
Page 5 of 11
CY7C271
CY7C274
Typical DC and AC Characteristics
NORMALIZED SUPPLY CURRENT
vs. AMBIENTTEMPERATURE
NORMALIZED ACCESS TIME
vs. SUPPLY VOLTAGE
NORMALIZED SUPPLY CURRENT
vs. SUPPLY VOLTAGE
1.2
1.6
1.4
1.2
1.1
1.0
0.9
0.8
1.0
0.8
1.2
1.0
0.6
0.4
T =25°C
A
0.8
0.6
f = f
MAX
T =25°C
A
−55
25
125
4.0
4.5
5.0
5.5
6.0
4.0
4.5
5.0
5.5
6.0
AMBIENT TEMPERATURE (°C)
SUPPLYVOLTAGE (V)
SUPPLYVOLTAGE (V)
OUTPUT SOURCE CURRENT
vs. VOLTAGE
TYPICAL ACCESS TIME CHANGE
vs. OUTPUT LOADING
NORMALIZED ACCESS TIME
vs. TEMPERATURE
40
60
50
40
30
1.6
1.4
1.2
1.0
0.8
30
20
10
0
20
10
V
CC
=4.5V
T =25°C
A
0
0.6
−55
0
1.0
2.0
3.0
4.0
0
200 400
600 800 1000
25
125
OUTPUT VOLTAGE (V)
CAPACITANCE (pF)
AMBIENT TEMPERATURE (°C)
NORMALIZED SUPPLY CURRENT
vs. CYCLE PERIOD
OUTPUT SINK CURRENT
vs. OUTPUT VOLTAGE
175
150
1.1
1.0
125
100
75
0.9
0.8
V
=5.0V
CC
50
T =25°C
A
0.7
0.6
25
0
0
50
100
150 200 250
0.0
1.0
2.0
3.0
4.0
CYCLE PERIOD (ns)
OUTPUT VOLTAGE (V)
C271-14
Document #: 38-04008 Rev. *B
Page 6 of 11
CY7C271
CY7C274
Ordering Information
Speed
(ns)
Package
Name
Operating
Range
Ordering Code
Package Type
30
CY7C274-30WC
CY7C271-35WMB
CY7C274-35QMB
CY7C271-45QMB
CY7C271-45WMB
CY7C274-45JC
W16
W22
Q55
Q55
W22
J65
28-Lead (600-Mil) Windowed CerDIP
Commercial
Military
35
28-Lead (300-Mil) Windowed CerDIP
32-Pin Windowed Rectangular Leadless Chip Carrier
32-Pin Windowed Rectangular Leadless Chip Carrier
28-Lead (300-Mil) Windowed CerDIP
45
32-Lead Plastic Leaded Chip Carrier
Commercial
Military
CY7C274-45WMB
CY7C271-55WMB
CY7C271-55QMB
W16
W22
Q55
28-Lead (600-Mil) Windowed CerDIP
55
28-Lead (300-Mil) Windowed CerDIP
32-Pin Windowed Rectangular Leadless Chip Carrier
MILITARY SPECIFICATIONS
Group A Subgroup Testing
DC Characteristics
Switching Characteristics
Parameter
Subgroups
Parameter
Subgroups
7, 8, 9, 10, 11
7, 8, 9, 10, 11
VOH
VOL
VIH
VIL
IIX
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
tAA
[10]
tACS
[11]
tOE
7, 8, 9, 10, 11
7, 8, 9, 10, 11
tACE
Note:
10. 7C271 only (CS1 and CS2).
11. 7C274 only.
IOZ
ICC
ISB
SMD Cross Reference
SMD
Cypress
Number
5962-89817
5962-89817
5962-89817
Suffix
Number
CY7C271-55QMB
CY7C271-45WMB
CY7C271-45QMB
01ZX
02XX
02ZX
Document #: 38-04008 Rev. *B
Page 7 of 11
CY7C271
CY7C274
Package Diagrams
28-Lead (300-Mil) Molded DIP P21
51-85014-*B
32-Pin Windowed Rectangular Leadless Chip Carrier Q55
MIL-STD-1835 C-12
51-80103-*A
Document #: 38-04008 Rev. *B
Page 8 of 11
CY7C271
CY7C274
Package Diagrams (continued)
28-Lead (600-Mil) Windowed CerDIP W16
MIL-STD-1835 D-10 Config. A
51-80020-**
Document #: 38-04008 Rev. *B
Page 9 of 11
CY7C271
CY7C274
Package Diagrams (continued)
(300-Mil)
28-Lead
Windowed CerDIP W22
MIL-STD-1835 D-15 Config. A
51-80087-**
All product and company names mentioned in this document may be the trademarks of their respective holders.
Document #: 38-04008 Rev. *B
Page 10 of 11
© Cypress Semiconductor Corporation, 2002. The information contained herein is subject to change without notice. Cypress Semiconductor Corporation assumes no responsibility for the use
of any circuitry other than circuitry embodied in a Cypress Semiconductor product. Nor does it convey or imply any license under patent or other rights. Cypress Semiconductor 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.
CY7C271
CY7C274
Document History Page
Document Title: CY7C271 CY7C274 32K x 8 Power Switched and Reprogrammable PROM
Document Number: 38-04008
Issue
Date
Orig. of
Change
REV.
**
ECN NO.
113864
118899
122249
Description of Change
Change from Spec number: 38-00068 to 38-04008
Updating Ordering Information
3/8/02
DSG
GBI
RBI
A*
10/10/02
12/27/02
*B
Add power up requirements to Operating Conditions information
Document #: 38-04008 Rev. *B
Page 11 of 11
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