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1CY7C274
CY7C271 CY7C274
32K x 8 Power Switched and Reprogrammable PROM
Features
* CMOS for optimum speed/power * Windowed for reprogrammability * High speed -- 30 ns (Commercial) -- 35 ns (Military) * Low power -- 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 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 reprogrammed. The memory cells utilize proven EPROM floating gate technology and byte-wide intelligent programming algorithms. 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. 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
Logic Block Diagram
A14 A13 A12 A11 A10 A9 A8 A7 A6 A5 A4 A3 A2 A1 A0 Y ADDRESS X ADDRESS 256 x 1024 PROGRAMABLE ARRAY 8 x 1 OF 128 MULTIPLEXER
Pin Configurations
DIP/Flatpack
O7 A9 A8 A7 A6 A5 A4 A3 A2 A1 A0 O0 O1 O2 O3 GND 1 2 3 4 28 27 26 VCC A10 A11 A12 A13 A14 CS1 CS2 CE O7 O6 O5 O4 O3 VPP A12 A7 A6 A5 A4 A3 A2 A1 A0 O0 O1 O2 GND
DIP/Flatpack
1 2 3 4 28 27 26 VCC A14 A13 A8 A9 A11 OE A10 CE O7 O6 O5 O4 O3
O6
O5
25 5 24 6 7C271 23 22 7 21 8 9 10 11 12 13 14 20 19 18 17 16 15
25 5 24 6 7C274 23 22 7 21 8 9 10 11 12 13 14 20 19 18 17 16 15
O4
LCC/PLCC (Opaque Only)
4 3 2 1 32 31 30 29 5 28 7C271 6 27 7 26 8 25 9 24 10 23 11 22 12 21 13 14151617 181920 O1 O2 GND NC O3 O4 O5 A7 A8 A9 NC V CC A10 A11 O2
LCC/PLCC (Opaque Only)
4 3 2 1 32 31 30 29 5 28 7C274 6 27 7 26 8 25 9 24 10 23 11 22 12 21 13 14151617 181920 O1 O2 GND NC O3 O4 O5 A7 A12 VPP NC V CC A14 A13
O1 POWER-DOWN
O0 CE (7C271) CS1 (7C271) CS2 (7C274) OE
A6 A5 A4 A3 A2 A1 A0 NC O0
A12 A13 A14 NC CS1 CS2 CE O7 O6
A6 A5 A4 A3 A2 A1 A0 NC O0
A8 A9 A11 NC OE A10 CE O7 O6
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
7C274-30 Maximum Access Time Maximum Operating Current Standby Current Com'l Military Com'l Military 30 30 120 7C271-35 7C274-35 35 120 130 30 40 7C271-45 7C274-45 45 120 130 30 40 7C271-55 55 120 130 30 40 Unit ns mA mA mA mA
Maximum Ratings[1]
(Above which the useful life may be impaired. For user guidelines, not tested.) Storage Temperature ..................................... -65C to +150C Ambient Temperature with Power Applied..................................................-55C to +125C 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) Latch-Up Current..................................................... >200 mA UV Exposure ................................................ 7258 Wsec/cm2
Operating Range
Range Commercial Military[2] Ambient Temperature 0C to +70C -55C to +125C VCC 5V 10% 5V 10%
Electrical Characteristics Over the Operating Range[3]
7C271- 35, 45, 55 7C274-30, 35, 45, Parameter VOH VOL VIH VIL IIX IOZ IOS ICC ISB VPP IPP VIHP VILP Description Output HIGH Voltage Output LOW Voltage Input HIGH Level Input LOW Level Input Current Output Leakage Current Output Short Circuit Current Power Supply Current Standby Supply Current Programming Supply Voltage Programming Supply Current Input HIGH Programming Voltage Input LOW Programming Voltage 3.0 0.4
[5]
Test Conditions VCC = Min., IOH = -2.0 mA VCC = Min., IOL = 8.0 mA[4] Guaranteed Input Logical HIGH Voltage for All Inputs Guaranteed Input Logical LOW Voltage for All Inputs GND < VIN < VCC GND < VOUT < VCC, Output Disabled VCC = Max., VOUT = GND VCC = Max., VIN = 2.0V, IOUT = 0 mA, CE=VIL VCC = Max., CE = VIH, IOUT = 0 mA Commercial Military Commercial Military
Min. 2.4
Max. 0.4
Unit V V V V A A mA mA mA V mA V V
2.0
VCC 0.8
-10 -40 -20
+10 +40 -90 120 130 30 40
12
13 50
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
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CY7C271 CY7C274
Capacitance[6]
Parameter CIN COUT Description Input Capacitance Output Capacitance Test Conditions TA = 25C, f = 1 MHz, VCC = 5.0V Max. 10 10 Unit pF pF
AC Test Loads and Waveforms[6]
R1 500 658 MIL 5V OUTPUT 30 pF INCLUDING JIG AND SCOPE R2 333 (403 MIL) 5 pF INCLUDING JIG AND SCOPE R2 333 (403 MIL) 3.0V GND 5 ns R1 500 658 MIL ALL INPUT PULSES 90% 10% 90% 10% 5 ns
5V OUTPUT
(a) Normal Load
Equivalent to: OUTPUT THEVENIN EQUIVALENT 200
(b) HighZ Load
250 2.00V COMMERCIAL OUTPUT 1.90V MILITARY
Switching Characteristics Over the Operating Range[3,6]
7C274-30 Parameter tAA tHZCS tACS tHZOE tOE tHZCE tACE tPU tPD tOH Description Address to Output Valid Chip Select Inactive to High Z (CS1 and CS2, 7C271 Only) Chip Select Active to Output Valid (CS1 and CS2, 7C271 Only) Output Enable Inactive to High Z (OE, 7C274 Only) Output Enable Active to Output Valid (OE, 7C274 Only) Chip Enable Inactive to High Z (CE Only) Chip Enable Active to Output Valid (CE Only) Chip Enable Active to Power Up Chip Enable Inactive to Power Down Output Hold from Address Change 0 0 35 0 7C271-35 7C274-35 7C271-45 7C274-45 7C271-55 Unit ns ns ns ns ns ns ns ns 60 0 ns ns
Min. Max. Min. Max. Min. Max. Min. Max. 30 20 20 20 20 35 35 0 40 0 35 25 25 20 20 40 40 0 50 45 30 30 25 25 50 50 0 55 30 30 25 25 60 60
Note: 6. See Introduction to CMOS PROMs for general information on testing.
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CY7C271 CY7C274
Switching Waveform
tPD VCC SUPPLY CURRENT A0 - A14 ADDRESS 50% tPU POWER-DOWN CONTROLLED BY CE 50%
CS2 OE, CE, CS1 [7] tAA tOH O0 - O7 PREVIOUS DATA VALID (tHZOE) tHZCS(E) DATA VALID (tOE) tACS(E) HIGH Z
Note: 7. CS2 and CS1 are used on the 7C271 only. OE is used on the 7C274 only.
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. The recommended dose of ultraviolet light for erasure is a wavelength of 2537 angstroms for a minimum dose (UV intensity x exposure time) of 25 Wsec/cm2. For an ultraviolet lamp with a 12 mW/cm2 power rating, the exposure time would be approximately 35 minutes. The CY7C271 or CY7C274 needs to be within 1 Table 1. CY7C271 Mode Selection
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.
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.
Pin Function[8] Read or Output Disable Mode Read Power Down Output Disable Output Disable Program Program Verify Program Inhibit Blank Check Other A14-A0 A14-A0 A14-A0 A14-A0 A14-A0 A14-A0 A14-A0 A14-A0 A14-A0 A14-A0 CE VFY VIL VIH X X VIHP VILP VIHP VILP CS2 PGM VIH X VIL X VILP VIHP/VILP VIHP VIHP/VILP CS1 VPP VIL X X VIH VPP VPP VPP VPP O7-O0 D7-D0 O7-O0 High Z High Z High Z D7-D0 O7-O0 High Z O7-O0
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CY7C271 CY7C274
Table 2. CY7C274 Mode Selection Pin Function[8] Read or Output Disable Mode Read Output Disable Power Down Program Program Verify Program Inhibit Blank Check
Note: 8. X can be VIL (VILP) or VIH (VIHP). 9. VPP should be tied to VCC 5% in read mode.
A14-A0 A14-A0 A14-A0 A14-A0 A14-A0 A14-A0 A14-A0 A14-A0 A14-A0
OE VFY VIL VIH X VIHP VILP VIHP VILP
CE PGM VIL X VIH VILP VIHP/VILP VIHP VIHP/VILP
VPP VPP Note 9 X X VPP VPP VPP VPP
O7-O0 D7-D0 O7-O0 High Z High Z D7-D0 O7-O0 High Z O7-O0
Other
DIP Top View
A9 A8 A7 A6 A5 A4 A3 A2 A1 A0 D0 D1 D2 GND 1 2 3 4 5 7C271 6 7 8 9 10 11 12 13 14 28 27 26 25 24 23 22 21 20 19 18 17 16 15 VCC A10 A11 A12 A13 A14 VPP PGM VFY D7 D6 D5 D4 D3
LCC Top View
A7 A8 A9 NC VCC A10 A11 A6 A5 A4 A3 A2 A1 A0 NC D0 4 3 2 1 32 31 30 29 5 28 6 27 7C271 7 26 8 25 9 24 10 23 11 22 12 21 13 14151617 181920 D1 D2 GND NC D3 D4 D5 A12 A13 A14 NC VPP PGM VFY D7 D6
DIP Top View
VPP A12 A7 A6 A5 A4 A3 A2 A1 A0 D0 D1 D2 GND 1 2 3 4 5 7C274 6 7 8 9 10 11 12 13 14 28 27 26 25 24 23 22 21 20 19 18 17 16 15 VCC A14 A13 A8 A9 A11 VFY A10 PGM D7 D6 D5 D4 D3
LCC Top View
A7 A12 VPP NC VCC A14 A13 A6 A5 A4 A3 A2 A1 A0 NC D0 4 3 2 1 32 31 30 29 5 28 6 7C274 27 7 26 8 25 9 24 10 23 11 22 12 21 13 14151617 181920 D1 D2 GND NC D3 D4 D5 A8 A9 A11 NC VFY A10 PGM D7 D6
Figure 1. Programming Pinouts
Document #: 38-04008 Rev. *B
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CY7C271 CY7C274
Typical DC and AC Characteristics
NORMALIZED SUPPLY CURRENT vs. SUPPLY VOLTAGE 1.6 NORMALIZED ICC 1.4 1.2 1.0 0.8 0.6 4.0 TA =25C f = fMAX 4.5 5.0 5.5 6.0 1.2 NORMALIZED SUPPLY CURRENT vs. AMBIENTTEMPERATURE NORMALIZED ACCESS TIME 1.2 NORMALIZED ACCESS TIME vs. SUPPLY VOLTAGE
NORMALIZED ICC
1.1
1.0
1.0
0.8
0.9
0.6 TA =25C 0.4 4.0 4.5 5.0 5.5 6.0
0.8 -55
25
125
SUPPLYVOLTAGE (V) NORMALIZED ACCESS TIME vs. TEMPERATURE NORMALIZED ACCESS TIME 1.6 1.4 1.2 1.0 0.8 0.6 -55
AMBIENT TEMPERATURE (C) OUTPUT SOURCE CURRENT vs. VOLTAGE 60 50 40 30 20 10 0 0 1.0 2.0 3.0 4.0 0 0 DELTA t AA (ns) 30 40
SUPPLYVOLTAGE (V) TYPICAL ACCESS TIME CHANGE vs. OUTPUT LOADING
OUTPUT SOURCE CURRENT (mA)
20
10
VCC =4.5V TA =25C 200 400 600 800 1000
25
125
AMBIENT TEMPERATURE (C) OUTPUT SINK CURRENT vs. OUTPUT VOLTAGE 175 150
OUTPUT VOLTAGE (V)
CAPACITANCE (pF)
NORMALIZED SUPPLY CURRENT vs. CYCLE PERIOD 1.1 1.0
OUTPUT SINK CURRENT (mA)
125 100 75 50 25 0 0.0 1.0 2.0 3.0 4.0 VCC =5.0V TA =25C
NORMALIZED ICC
0.9 0.8 0.7 0.6
0
50
100
150
200
250
OUTPUT VOLTAGE (V)
CYCLE PERIOD (ns)
C271-14
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CY7C271 CY7C274
Ordering Information
Speed (ns) 30 35 Ordering Code CY7C274-30WC CY7C271-35WMB CY7C274-35QMB 45 CY7C271-45QMB CY7C271-45WMB CY7C274-45JC CY7C274-45WMB 55 CY7C271-55WMB CY7C271-55QMB Package Name W16 W22 Q55 Q55 W22 J65 W16 W22 Q55 Package Type 28-Lead (600-Mil) Windowed CerDIP 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 32-Lead Plastic Leaded Chip Carrier 28-Lead (600-Mil) Windowed CerDIP 28-Lead (300-Mil) Windowed CerDIP 32-Pin Windowed Rectangular Leadless Chip Carrier Commercial Military Operating Range Commercial Military
MILITARY SPECIFICATIONS Group A Subgroup Testing DC Characteristics
Parameter VOH VOL VIH VIL IIX IOZ ICC ISB 1, 2, 3 1, 2, 3 1, 2, 3 1, 2, 3 1, 2, 3 1, 2, 3 1, 2, 3 1, 2, 3 Subgroups tAA tACS[10] tOE[11] tACE
Note: 10. 7C271 only (CS1 and CS2). 11. 7C274 only.
Switching Characteristics
Parameter Subgroups 7, 8, 9, 10, 11 7, 8, 9, 10, 11 7, 8, 9, 10, 11 7, 8, 9, 10, 11
SMD Cross Reference
SMD Number 5962-89817 5962-89817 5962-89817 Suffix 01ZX 02XX 02ZX Cypress Number CY7C271-55QMB CY7C271-45WMB CY7C271-45QMB
Document #: 38-04008 Rev. *B
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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
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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
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CY7C271 CY7C274
Package Diagrams (continued)
28-Lead (300-Mil) 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
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(c) 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 REV. ** A* *B ECN NO. 113864 118899 122249 Issue Date 3/8/02 10/10/02 12/27/02 Orig. of Change DSG GBI RBI Description of Change Change from Spec number: 38-00068 to 38-04008 Updating Ordering Information Add power up requirements to Operating Conditions information
Document #: 38-04008 Rev. *B
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