74 CY7C271 CY7C274 32K x 8 Power Switched and Reprogrammable PROM HIGH), the 7C271/7C274 automatically powers down into a 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 7C271 and 7C274 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. Features • CMOS for optimum speed/power • Windowed for reprogrammability • High speed — 30 ns (commercial) — 35 ns (military) • Low power — 660 mW (commercial) Functional Description The CY7C271 and CY7C274 are high-performance 32,768-word by 8-bit CMOS PROMs. When disabled (CE 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). Pin Configurations LogicBlockDiagram DIP/Flatpack A9 A8 A7 A6 O7 A14 A13 A12 X ADDRESS 256 x 1024 PROGRAMABLE ARRAY A11 A10 8 x 1 OF 128 MULTIPLEXER 13 16 GND 14 15 A5 A4 O3 A3 Y ADDRESS A2 27 26 O2 O4 A6 2 3 4 O0 O1 A5 A4 A3 A2 A1 A0 A8 A7 28 25 5 24 6 7C271 23 22 7 21 8 9 20 10 19 11 18 12 17 O6 O5 A9 1 DIP/Flatpack VCC A10 A11 A12 VPP A12 A7 A6 A13 A14 CS1 A5 A4 A3 A2 A1 A0 LCC/PLCC (Opaque Only) A6 A5 A4 A3 A2 A1 A0 NC O0 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 • San Jose A0 O1 POWER–DOWN O0 Cypress Semiconductor Corporation Document #: 38-04008 Rev. ** O1 O2 GND NC O3 O4 O5 CE (7C271) CS1 (7C271) CS2 (7C274) OE • 3901 North First Street • 27 26 O0 O1 O2 13 16 GND 14 15 VCC A14 A13 A8 A9 A11 OE A10 CE O7 O6 O5 O4 O3 LCC/PLCC (Opaque Only) A7 A8 A9 NC VCC A10 A11 O2 A1 28 2 3 4 25 5 24 7C274 6 23 22 7 21 8 9 20 10 19 11 18 12 17 CS2 CE O7 O6 O5 O4 O3 1 A7 A12 VPP NC VCC A14 A13 • • • • — 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 A12 A13 A14 NC CS1 CS2 CE O7 O6 A6 A5 A4 A3 A2 A1 A0 NC O0 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 A8 A9 A11 NC OE A10 CE O7 O6 O1 O2 GND NC O3 O4 O5 • 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. CA 95134 • 408-943-2600 Revised March 4, 2002 CY7C271 CY7C274 Selection Guide 7C271-30 7C274-30 7C271-35 7C274-35 7C271-45 7C274-45 7C271-55 7C274-55 Maximum Access Time (ns) 30 35 45 55 Maximum Operating Current (mA) Com’l 120 120 120 120 130 130 130 Standby Current (mA) Com’l 30 30 30 40 40 40 Military 30 Military Maximum Ratings Static Discharge Voltage ........................................... >2001V (per MIL-STD-883, Method 3015) (Above which the useful life may be impaired. For user guidelines, not tested.) Latch-Up Current..................................................... >200 mA UV Exposure ................................................ 7258 Wsec/cm2 Storage Temperature ..................................... −65°C to +150°C Operating Range Ambient Temperature with Power Applied..................................................−55°C to +125°C Supply Voltage to Ground Potential .................−0.5V to +7.0V Range Ambient Temperature VCC DC Voltage Applied to Outputs in High Z State .....................................................−0.5V to +7.0V Commercial 0°C to +70°C 5V ±10% −40°C to +85°C 5V ±10% −55°C to +125°C 5V ±10% Industrial DC Input Voltage .................................................−3.0V to +7.0V [1] Military[2] DC Program Voltage .....................................................13.0V Electrical Characteristics Over the Operating Range[3] 7C271-30, 35, 45, 55 7C274-30, 35, 45, 55 Parameter Description Test Conditions Output HIGH Voltage VCC = Min., IOH = −2.0 mA VOL Output LOW Voltage [4] VCC = Min., IOL = 8.0 mA VIH Input HIGH Level Guaranteed Input Logical HIGH Voltage for All Inputs VIL Input LOW Level Guaranteed Input Logical LOW Voltage for All Inputs IIX Input Current GND < VIN < VCC IOZ Output Leakage Current IOS Output Short Circuit Current[5] ICC Power Supply Current VCC = Max., VIN = 2.0V, IOUT = 0 mA, CE=VIL VCC = Max., CE = VIH, IOUT = 0 mA VOH ISB Standby Supply Current VPP Programming Supply Voltage IPP Programming Supply Current VIHP Input HIGH Programming Voltage VILP Input LOW Programming Voltage Min. Max. 2.4 Unit V 0.4 V VCC V 0.8 V −10 +10 µA GND < VOUT < VCC, Output Disabled −40 +40 µA VCC = Max., VOUT = GND −20 −90 mA Commercial 120 mA Military 130 Commercial 30 2.0 Military mA 40 12 13 V 50 mA 3.0 V 0.4 V Note: 1. Contact a Cypress representative for information on industrial temperature range specifications. 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. ** Page 2 of 15 CY7C271 CY7C274 Capacitance[6] Parameter Description CIN Input Capacitance COUT Output Capacitance Test Conditions TA = 25°C, f = 1 MHz, VCC = 5.0V Max. Unit 10 pF 10 pF AC Test Loads and Waveforms[6] R1 500Ω 658Ω MIL 5V R1 500Ω 658Ω MIL 5V OUTPUT 30 pF R2 333Ω (403Ω MIL) 5 pF (a) Normal Load OUTPUT R2 333Ω (403Ω MIL) 90% 10% 90% 10% GND ≤ 5 ns ≤ 5 ns INCLUDING JIG AND SCOPE INCLUDING JIG AND SCOPE Equivalent to: ALL INPUT PULSES 3.0V OUTPUT (b) HighZ Load THÉVENIN EQUIVALENT 200Ω 250Ω 2.00V COMMERCIAL OUTPUT 1.90V MILITARY Switching Characteristics Over the Operating Range[3,6] 7C271-30 7C274-30 Parameter Description 7C271-35 7C274-35 7C271-45 7C274-45 7C271-55 7C274-55 Min. Max. Min. Max. Min. Max. Min. Max. Unit tAA Address to Output Valid 30 35 45 55 ns tHZCS Chip Select Inactive to High Z (CS1 and CS2, 7C271 Only) 20 25 30 30 ns tACS Chip Select Active to Output Valid (CS1 and CS2, 7C271 Only) 20 25 30 30 ns tHZOE Output Enable Inactive to High Z (OE, 7C274 Only) 20 20 25 25 ns tOE Output Enable Active to Output Valid (OE, 7C274 Only) 20 20 25 25 ns tHZCE Chip Enable Inactive to High Z (CE Only) 35 40 50 60 ns tACE Chip Enable Active to Output Valid (CE Only) 35 40 50 60 ns tPU Chip Enable Active to Power Up tPD Chip Enable Inactive to Power Down tOH Output Hold from Address Change 0 0 35 0 0 40 0 0 50 0 ns 60 0 ns ns Note: 6. See Introduction to CMOS PROMs for general information on testing. Document #: 38-04008 Rev. ** Page 3 of 15 CY7C271 CY7C274 Switching Waveform tPU tPD VCC SUPPLY CURRENT 50% POWER-DOWN CONTROLLED BY CE 50% A0 − A14 ADDRESS CS2 OE, CE, CS1 [7 tAA (tOE) tACS(E) (tHZOE) tHZCS(E) tOH O0 - O7 PREVIOUS DATA VALID HIGH Z DATA VALID Note: 7. CS2 and CS1 are used on the 7C271 only. OE is used on the 7C274 only. 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 7C271 and 7C274 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 approximately 35 minutes. The 7C271 or 7C274 needs to be within 1 inch of the Table 1. CY7C271 Mode Selection Pin Function[8] Read or Output Disable A14–A0 CE CS2 CS1 O7–O0 Other A14–A0 VFY PGM VPP D7–D0 Read A14–A0 VIL VIH VIL O7–O0 Power Down A14–A0 VIH X X High Z Output Disable A14–A0 X VIL X High Z Output Disable A14–A0 X X VIH High Z Program A14–A0 VIHP VILP VPP D7–D0 Program Verify A14–A0 VILP VIHP/VILP VPP O7–O0 Program Inhibit A14–A0 VIHP VIHP VPP High Z Blank Check A14–A0 VILP VIHP/VILP VPP O7–O0 Mode Document #: 38-04008 Rev. ** Page 4 of 15 CY7C271 CY7C274 Table 2. CY7C274 Mode Selection Pin Function[8] Read or Output Disable A14–A0 OE CE VPP O7–O0 Other A14–A0 VFY PGM VPP D7–D0 Read A14–A0 VIL VIL Note 9 O7–O0 Output Disable A14–A0 VIH X X High Z Power Down A14–A0 X VIH X High Z Program A14–A0 VIHP VILP VPP D7–D0 Program Verify A14–A0 VILP VIHP/VILP VPP O7–O0 Program Inhibit A14–A0 VIHP VIHP VPP High Z Blank Check A14–A0 VILP VIHP/VILP VPP O7–O0 Mode Note: 8. X can be VIL (VILP) or VIH (VIHP). 9. VPP should be tied to VCC ±5% in read mode. 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 A6 A5 A4 A3 A2 A1 A0 NC D0 1 2 3 4 5 7C274 6 7 8 9 10 11 12 13 28 27 26 14 15 25 24 23 22 21 20 19 18 17 16 A12 A13 A14 NC VPP PGM VFY D7 D6 LCC Top View VCC A14 A13 A8 A9 A11 VFY A10 PGM D7 D6 D5 D4 D3 A7 A12 VPP NC VCC A14 A13 DIP Top View VPP A12 A7 A6 A5 A4 A3 A2 A1 A0 D0 D1 D2 GND 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 1 2 3 4 5 7C271 6 7 8 9 10 11 12 13 14 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 A8 A9 A11 NC VFY A10 PGM D7 D6 D1 D2 GND NC D3 D4 D5 A9 A8 A7 A6 A5 A4 A3 A2 A1 A0 D0 D1 D2 GND LCC Top View A7 A8 A9 NC VCC A10 A11 DIP Top View Figure 1. Programming Pinouts Document #: 38-04008 Rev. ** Page 5 of 15 CY7C271 CY7C274 Typical DC and AC Characteristics 1.2 1.0 TA =25°C f = fMAX 0.6 4.0 4.5 5.0 5.5 1.1 1.0 0.9 0.8 −55 6.0 SUPPLYVOLTAGE (V) 1.6 1.4 1.2 1.0 0.8 25 1.0 0.8 0.6 TA =25°C 0.4 4.0 4.5 5.0 5.5 6.0 SUPPLYVOLTAGE (V) OUTPUT SOURCE CURRENT vs. VOLTAGE TYPICAL ACCESS TIME CHANGE vs. OUTPUT LOADING 40 60 50 40 30 20 30 20 10 VCC =4.5V TA =25°C 10 0 125 0 1.0 AMBIENT TEMPERATURE (°C) OUTPUT SINK CURRENT (mA) 125 DELTA t AA (ns) OUTPUT SOURCE CURRENT (mA) NORMALIZED ACCESS TIME NORMALIZED ACCESS TIME vs. TEMPERATURE 0.6 −55 25 1.2 AMBIENT TEMPERATURE (°C) 2.0 3.0 0 4.0 0 OUTPUT VOLTAGE (V) 200 400 600 800 1000 CAPACITANCE (pF) NORMALIZED SUPPLY CURRENT vs. CYCLE PERIOD OUTPUT SINK CURRENT vs. OUTPUT VOLTAGE 175 1.1 150 1.0 NORMALIZED ICC 0.8 NORMALIZED ACCESS TIME 1.2 NORMALIZED ICC NORMALIZED ICC 1.6 1.4 NORMALIZED ACCESS TIME vs. SUPPLY VOLTAGE NORMALIZED SUPPLY CURRENT vs. AMBIENTTEMPERATURE NORMALIZED SUPPLY CURRENT vs. SUPPLY VOLTAGE 125 100 75 VCC =5.0V TA =25°C 50 25 0 0.0 1.0 2.0 3.0 OUTPUT VOLTAGE (V) 4.0 0.9 0.8 0.7 0.6 0 50 100 150 200 250 CYCLE PERIOD (ns) C271-14 Document #: 38-04008 Rev. ** Page 6 of 15 CY7C271 CY7C274 Ordering Information[10] Speed (ns) 30 35 45 55 Ordering Code Package Name Package Type CY7C271-30JC J65 32-Lead Plastic Leaded Chip Carrier CY7C271-30PC P21 28-Lead (300-Mil) Molded DIP CY7C271-30WC W22 28-Lead (300-Mil) Windowed CerDIP CY7C271-35JC J65 32-Lead Plastic Leaded Chip Carrier CY7C271-35PC P21 28-Lead (300-Mil) Molded DIP CY7C271-35WC W22 28-Lead (300-Mil) Windowed CerDIP CY7C271-35DMB D22 28-Lead (300-Mil) CerDIP CY7C271-35KMB K74 28-Lead Rectangular Cerpack CY7C271-35LMB L55 32-Pin Rectangular Leadless Chip Carrier CY7C271-35QMB Q55 32-Pin Windowed Rectangular Leadless Chip Carrier CY7C271-35WMB W22 28-Lead (300-Mil) Windowed CerDIP CY7C271-45JC J65 32-Lead Plastic Leaded Chip Carrier CY7C271-45PC P21 28-Lead (300-Mil) Molded DIP CY7C271-45WC W22 28-Lead (300-Mil) Windowed CerDIP CY7C271-45DMB D22 28-Lead (300-Mil) CerDIP CY7C271-45KMB K74 28-Lead Rectangular Cerpack CY7C271-45LMB L55 32-Pin Rectangular Leadless Chip Carrier CY7C271-45QMB Q55 32-Pin Windowed Rectangular Leadless Chip Carrier CY7C271-45TMB T74 28-Lead Windowed Cerpack CY7C271-45WMB W22 28-Lead (300-Mil) Windowed CerDIP CY7C271-55JC J65 32-Lead Plastic Leaded Chip Carrier CY7C271-55PC P21 28-Lead (300-Mil) Molded DIP CY7C271-55WC W22 28-Lead (300-Mil) Windowed CerDIP CY7C271-55DMB D22 28-Lead (300-Mil) CerDIP CY7C271-55KMB K74 28-Lead Rectangular Cerpack CY7C271-55LMB L55 32-Pin Rectangular Leadless Chip Carrier CY7C271-55QMB Q55 32-Pin Windowed Rectangular Leadless Chip Carrier CY7C271-55TMB T74 28-Lead Windowed Cerpack CY7C271-55WMB W22 28-Lead (300-Mil) Windowed CerDIP Operating Range Commercial Commercial Military Commercial Military Commercial Military Note: 10. Most of these products are available in industrial temperature range. Contact a Cypress representative for specifications and product availability. Document #: 38-04008 Rev. ** Page 7 of 15 CY7C271 CY7C274 Ordering Information[10] (Continued) Speed (ns) 30 35 45 55 Ordering Code Package Name Package Type CY7C274-30JC J65 32-Lead Plastic Leaded Chip Carrier CY7C274-30PC P15 28-Lead (600-Mil) Molded DIP CY7C274-30WC W16 28-Lead (600-Mil) Windowed CerDIP CY7C274-35JC J65 32-Lead Plastic Leaded Chip Carrier CY7C274-35PC P15 28-Lead (600-Mil) Molded DIP CY7C274-35WC W16 28-Lead (600-Mil) Windowed CerDIP CY7C274-35DMB D16 28-Lead (600-Mil) CerDIP CY7C274-35KMB K74 28-Lead Rectangular Cerpack CY7C274-35LMB L55 32-Pin Rectangular Leadless Chip Carrier CY7C274-35QMB Q55 32-Pin Windowed Rectangular Leadless Chip Carrier CY7C274-35TMB T74 28-Lead Windowed Cerpack CY7C274-35WMB W16 28-Lead (600-Mil) Windowed CerDIP CY7C274-45JC J65 32-Lead Plastic Leaded Chip Carrier CY7C274-45PC P15 28-Lead (600-Mil) Molded DIP CY7C274-45WC W16 28-Lead (600-Mil) Windowed CerDIP CY7C274-45DMB D16 28-Lead (600-Mil) CerDIP CY7C274-45KMB K74 28-Lead Rectangular Cerpack CY7C274-45LMB L55 32-Pin Rectangular Leadless Chip Carrier CY7C274-45QMB Q55 32-Pin Windowed Rectangular Leadless Chip Carrier CY7C274-45TMB T74 28-Lead Windowed Cerpack CY7C274-45WMB W16 28-Lead (600-Mil) Windowed CerDIP CY7C274-55JC J65 32-Lead Plastic Leaded Chip Carrier CY7C274-55PC P15 28-Lead (600-Mil) Molded DIP CY7C274-55WC W16 28-Lead (600-Mil) Windowed CerDIP CY7C274-55DMB D16 28-Lead (600-Mil) CerDIP CY7C274-55KMB K74 28-Lead Rectangular Cerpack CY7C274-55LMB L55 32-Pin Rectangular Leadless Chip Carrier CY7C274-55QMB Q55 32-Pin Windowed Rectangular Leadless Chip Carrier CY7C274-55TMB T74 28-Lead Windowed Cerpack CY7C274-55WMB W16 28-Lead (600-Mil) Windowed CerDIP Document #: 38-04008 Rev. ** Operating Range Commercial Commercial Military Commercial Military Commercial Military Page 8 of 15 CY7C271 CY7C274 MILITARY SPECIFICATIONS Group A Subgroup Testing DC Characteristics Parameter VOH Switching Characteristics Subgroups Parameter Subgroups 1, 2, 3 tAA 7, 8, 9, 10, 11 VOL 1, 2, 3 tACS[11] 7, 8, 9, 10, 11 VIH 1, 2, 3 tOE[12] 7, 8, 9, 10, 11 VIL 1, 2, 3 tACE 7, 8, 9, 10, 11 IIX 1, 2, 3 IOZ 1, 2, 3 Note: 11. 7C271 only (CS1 and CS2). 12. 7C274 only. ICC 1, 2, 3 ISB 1, 2, 3 SMD Cross Reference SMD Number Suffix Cypress Number 5962-89817 01XX CY7C271-55WMB 5962-89817 01YX CY7C271-55TMB 5962-89817 01ZX CY7C271-55QMB 5962-89817 02XX CY7C271-45WMB 5962-89817 02YX CY7C271-45TMB 5962-89817 02ZX CY7C271-45QMB Package Diagrams 28-Lead (600-Mil) CerDIP D16 MIL-STD-1835 D-10 Config. A 51-80019 Document #: 38-04008 Rev. ** Page 9 of 15 CY7C271 CY7C274 Package Diagrams (continued) 28-Lead (300-Mil) CerDIP D22 MIL-STD-1835 D-15 Config. A 51-80032 28-Lead Rectangular Cerpack K74 MIL-STD-1835 F-11 Config. A 51-80061 Document #: 38-04008 Rev. ** Page 10 of 15 CY7C271 CY7C274 Package Diagrams (continued) 32-Pin Rectangular Leadless Chip Carrier L55 MIL-STD-1835 C-12 51-80068 28-Lead (600-Mil) Molded DIP P15 51-85017-A Document #: 38-04008 Rev. ** Page 11 of 15 CY7C271 CY7C274 Package Diagrams (continued) 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. ** Page 12 of 15 CY7C271 CY7C274 Package Diagrams (continued) 28-Lead Windowed Cerpack T74 28-Lead (600-Mil) Windowed CerDIP W16 MIL-STD-1835 D-10 Config. A Document #: 38-04008 Rev. ** Page 13 of 15 CY7C271 CY7C274 Package Diagrams (continued) 28-Lead (300-Mil) Windowed CerDIP W22 MIL-STD-1835 D-15 Config. A 51-80087 Document #: 38-04008 Rev. ** Page 14 of 15 © 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 Title: CY7C271 CY7C274 32K x 8 Power Switched and Reprogrammable PROM Document Number: 38-04008 REV. ECN NO. Issue Date Orig. of Change ** 113864 3/8/02 DSG Document #: 38-04008 Rev. ** Description of Change Change from Spec number: 38-00068 to 38-04008 Page 15 of 15