CY7C251 CY7C254 7C254 7C251 C251-2 C251-1 C251-3 7C251-45 7C254-45 7C251-55 - Datasheet Archive

 

CY7C251 CY7C254 16K x 8 Power Switched and Reprogrammable PROM Features Functional Description · CMOS for optimum

 

1CY 7C25 4 CY7C251 CY7C251 CY7C254 CY7C254 16K x 8 Power Switched and Reprogrammable PROM Features Functional Description · CMOS for optimum speed/power · Windowed for reprogrammability · High speed - 45 ns · Low power - 550 mW (commercial) The CY7C251 CY7C251 and CY7C254 CY7C254 are high-performance 16,384-word by 8-bit CMOS PROMs. When deselected, the CY7C251 CY7C251 automatically powers down into a low-power stand-by mode. It is packaged in a 300-mil-wide package. The 7C254 7C254 is packaged in a 600-mil-wide package and does not power down when deselected. The 7C251 7C251 and 7C254 7C254 are available in reprogrammable packages equipped with an erasure window; when exposed to UV light, these PROMs are erased and can then be reprogrammed. The memory cells utilize proven EPROM floating gate technology and byte-wide intelligent programming algorithms. - 660 mW (military) · Super low standby power (7C251 7C251) - Less than 165 mW when deselected · · · · · · - Fast access: 50 ns EPROM technology 100% programmable Slim 300-mil or standard 600-mil packaging available 5V ±10% VCC, commercial and military TTL-compatible I/O Direct replacement for bipolar PROMs Capable of withstanding >2001V static discharge The CY7C251 CY7C251 and CY7C254 CY7C254 are plug-in replacements for bipolar devices and offer the advantages of lower power, superior performance, and high 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 is accomplished by placing all four chip selects in their active states. The contents of the memory location addressed by the address lines (A0 ­ A13) will become available on the output lines (O0 ­ O7). Logic Block Diagram Pin Configurations O7 A13 A12 A11 A10 512 x 256 PROGRAMABLE ARRAY ROW ADDRESS A9 O6 8 x 1 OF 32 MULTIPLEXER X O5 A8 A7 A6 A5 O4 ADDRESS DECODER A4 O3 A3 A2 A1 DIP/Flatpack A9 A8 A7 A6 A5 A4 A3 A2 A1 A0 O0 O1 O2 GND COLUMN ADDRESS 1 2 3 4 5 6 7C251 7C251 7 8 9 7C254 7C254 10 11 12 13 14 28 27 26 25 24 23 22 21 20 19 18 17 16 15 VCC A10 A11 A12 A13 CS1 CS2 CS3 CS4 O7 O6 O5 O4 O3 C251-2 C251-2 LCC Y O2 A0 POWER-DOWN (7C251 7C251) O1 O0 CS1 CS2 A5 A4 A3 A2 A1 A0 NC O0 O1 4 3 2 1 32 31 30 29 5 28 6 7C251 7C251 27 7 26 8 25 9 24 10 7C254 7C254 23 11 22 12 21 13 14151617 181920 A12 A13 CS1 CS2 CS3 CS4 NC O7 O6 CS3 CS4 Cypress Semiconductor Corporation C251-1 C251-1 · 3901 North First Street · C251-3 C251-3 San Jose · CA 95134 · 408-943-2600 November 1986 ­ Revised December 1992 CY7C251 CY7C251 CY7C254 CY7C254 Selection Guide 7C251-45 7C251-45, 7C254-45 7C254-45 Maximum Access Time (ns) 7C251-55 7C251-55, 7C254-55 7C254-55 7C251-65 7C251-65, 7C254-65 7C254-65 45 55 65 Maximum Operating Current (mA) Commercial 100 100 100 Military 120 120 120 Standby Current (mA) (7C251 7C251 only) Commercial 30 30 30 Military 35 35 35 Maximum Ratings Static Discharge Voltage . >2001V (per MIL­STD­883, Method 3015) (Above which the useful life may be impaired. For user guidelines, not tested.) Latch­Up Current . >200 mA UV Exposure . 7258 Wsec/cm 2 Storage Temperature . ­65°C to +150°C Ambient Temperature with Power Applied. ­55°C to +125°C Operating Range Range Ambient Temperature VCC Commercial Supply Voltage to Ground Potential (Pin 28 to Pin 14) . ­0.5V to +7.0V DC Program Voltage (Pin 22) .13.5V 5V ±10% ­40°C to +85°C 5V ±10% Military[2] DC Input Voltage. ­3.0V to +7.0V 0°C to +70°C Industrial[1] DC Voltage Applied to Outputs in High Z State . ­0.5V to +7.0V ­55°C to +125°C 5V ±10% ] Electrical Characteristics Over the Operating Range[3, 4] 7C251-45 7C251-45,55,65 7C254-45 7C254-45,55,65 Parameter Description VOH Output HIGH Voltage VOL Output LOW Voltage VIH Test Conditions Min. VCC = Min., IOH = ­4.0 mA VCC = Min., IOL = 16.0 mA Input HIGH Level Guaranteed Input Logical HIGH Voltage for All Inputs 2.0 VIL Input LOW Level Guaranteed Input Logical LOW Voltage for All Inputs IIX Input Current GND < VIN < VCC VCD Input Diode Clamp Voltage IOZ Output Leakage Current Max. 2.4 Current[5] Unit V 0.5 V V 0.8 V +10 µA ­40 +40 µA ­20 ­10 Note 4 GND < VOUT < VCC, Output Disabled VCC = Max., VOUT = GND IOS Output Short Circuit ­90 mA ICC Power Supply Current VCC = Max., IOUT = 0 mA VCC = Max., IOUT = 0 mA Com'l 100 mA Mil 120 ISB Standby Supply Current (7C251 7C251) VCC = Max., CS1 = VIH, IOUT = 0 mA Com'l 30 Mil 35 VPP Programming Supply Voltage IPP Programming Supply Current VIHP Input HIGH Programming Voltage VILP 12 Input LOW Programming Voltage mA 13 V 50 mA 3.0 V 0.4 Notes: 1. Contact a Cypress representative regarding industrial temperature range specification. 2. TA is the "instant on" case temperature. 3. See the last page of this specification for Group A subgroup testing information. 4. See the "Introduction to CMOS PROMs" section of the Cypress Data Book for general information on testing. 5. For test purposes, not more than one output at a time should be shorted. Short circuit test duration should not exceed 30 seconds. 2 V CY7C251 CY7C251 CY7C254 CY7C254 Capacitance[4] Parameter Description CIN COUT Test Conditions Input Capacitance Output Capacitance Max. Unit 10 pF 10 TA = 25°C, f = 1 MHz, VCC = 5.0V pF AC Test Loads and Waveforms[4] R1 235 5V R1 235 5V OUTPUT R2 159 30 pF Equivalent to: INCLUDING JIG AND SCOPE (a) Normal Load GND R2 159 5 pF INCLUDING JIG AND SCOPE ALL INPUT PULSES 90% 90% 10% 10% 3.0V OUTPUT 5 ns 5 C251-4 C251-4 ns C251-5 C251-5 (b) High Z Load THÉVENINEQUIVALENT OUTPUT 95 2.02V C251-6 C251-6 Switching Characteristics Over the Operating Range[2, 4] 7C251-45 7C251-45 7C254-45 7C254-45 Parameter tAA Description Min. Address to Output Valid 7C251-55 7C251-55 7C254-55 7C254-55 Max. Min. Max. 7C251-65 7C251-65 7C254-65 7C254-65 Min. Max. Unit 45 55 65 ns 25 Z[6] 30 35 ns tHZCS1 Chip Select Inactive to High tHZCS2 Chip Select Inactive to High Z (7C251 7C251, CS1 Only) 50 60 70 ns tACS1 Chip Select Active to Output Valid[6] 25 30 35 ns tACS2 Chip Select Active to Output Valid (7C251 7C251, CS1 Only) 50 60 70 ns tPU Chip Select Active to Power Up (7C251 7C251) tPD Chip Select Inactive to Power Down 0 (7C251 7C251) [7] 0 50 0 60 ns 70 ns Switching Waveform[4, 7] tPU tPD VCC SUPPLY CURRENT 50% 50% A0 ­ A13 ADDRESS CS3 CS1, CS2, CS4 tAA tHZCS tACS O0 ­ O7 C251-7 C251-7 Notes: 6. tHZCS1 and tACS1 refers to 7C254 7C254 (all chip selects); and 7C251 7C251 (CS2, CS3 and CS4 only). 7. Power-down controlled by 7C251 7C251 CS1 only. 3 CY7C251 CY7C251 CY7C254 CY7C254 Erasure Characteristics Blankcheck Wavelengths of light less than 4000 angstroms begin to erase the 7C251 7C251 and 7C254 7C254 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. Blankcheck is accomplished by performing a verify cycle (VFY toggles on each address), sequencing through all memory address locations, where all the data read will be zeros. 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 7C251 7C251 or 7C254 7C254 needs to be within 1 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 support is available from Cypress as well as from a number of third­party 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. Programming Information Table 1. Mode Selection Pin Function[8] Read or Output Disable A13 ­ A0 CS4 CS3 CS2 CS1 O 7 ­ O0 Other A13 ­ A0 NA VFY VPP PGM D 7 ­ D0 VIL VIH VIL VIL O7 ­O0 Output Disable A13 ­ A0 A13 ­ A0 X X X VIH High Z Output Disable A13 ­ A0 X X VIH X High Z Output Disable A13 ­ A0 A13 ­ A0 X VIL X X High Z Mode Read Output Disable VIH X X X High Z X VIHP VPP VILP D 7 ­ D0 Program Verify A13 ­ A0 A13 ­ A0 X VILP VPP VIHP O 7 ­ O0 Program Inhibit A13 ­ A0 X VIHP VPP VIHP High Z Blank Check A13 ­ A0 X VILP VPP VIHP O 7 ­ O0 Program Note: 8. X = "don't care" but not to exceed VCC ±5%. DIP/Flatpack Top View A9 A8 A7 A6 A5 A4 A3 A2 A1 A0 D0 D1 D2 GND 1 2 3 4 5 6 7C251 7C251 7 8 9 7C254 7C254 10 11 12 13 14 28 27 26 25 24 23 22 21 20 19 18 17 16 15 LCC Top View VCC A10 A11 A12 A13 PGM VPP VFY NA D7 D6 D5 D4 D3 C251-8 C251-8 A5 A4 A3 A2 A1 A0 NC D0 D1 4 3 2 1 32 31 30 29 5 28 6 7C251 7C251 27 7 26 8 25 9 24 10 23 11 7C254 7C254 22 12 21 13 14 15 16 17 18 19 20 A12 A13 PGM VPP VFY NA NC D7 D6 C251-9 C251-9 Figure 1. Programmable Pinout 4 CY7C251 CY7C251 CY7C254 CY7C254 Typical DC and AC Characteristics NORMALIZED ACCESS TIME vs. SUPPLY VOLTAGE NORMALIZED SUPPLYCURRENT vs. AMBIENT TEMPERATURE NORMALIZED SUPPLYCURRENT vs. SUPPLY VOLTAGE 1.2 1.2 1.1 1.0 1.0 0.8 0.9 1.6 0.6 0.8 ­55 0.4 4.0 1.4 1.2 1.0 TA =25°C f = fMAX 0.8 0.6 4.0 4.5 5.0 5.5 TA =25°C 6.0 25 125 AMBIENT TEMPERATURE (°C) SUPPLYVOLTAGE (V) 5.5 6.0 TYPICAL ACCESS TIME CHANGE vs. OUTPUT LOADING 60 30.0 50 25.0 40 20.0 30 15.0 20 10.0 10 1.6 5.0 SUPPLY VOLTAGE (V) OUTPUT SOURCE CURRENT vs. VOLTAGE NORMALIZED ACCESS TIME vs. TEMPERATURE 4.5 5.0 1.4 1.2 1.0 0.8 0.6 - 55 0 25 125 0 1.0 2.0 3.0 4.0 OUTPUTVOLTAGE (V) AMBIENT TEMPERATURE (°C) 175 150 125 100 75 VCC =5.0V TA =25°C 25 0 0.0 1.0 2.0 3.0 OUTPUT VOLTAGE (V) 5 0 200 400 600 800 1000 CAPACITANCE (pF) OUTPUT SINK CURRENT vs. OUTPUT VOLTAGE 50 0.0 VCC =4.5V TA =25°C 4.0 CY7C251 CY7C251 CY7C254 CY7C254 Ordering Information[9] Speed (ns) 45 Ordering Code Package Name Package Type 28-Lead (300-Mil) Windowed CerDIP D22 28-Lead (300-Mil) CerDIP W22 28-Lead (300-Mil) Windowed CerDIP CY7C251 CY7C251­55PC P21 28-Lead (300-Mil) Molded DIP CY7C251 CY7C251­55WC W22 28-Lead (300-Mil) Windowed CerDIP CY7C251 CY7C251­55DMB 55DMB D22 28-Lead (300-Mil) CerDIP CY7C251 CY7C251­55LMB 55LMB L55 32-Pin Rectangular Leadless Chip Carrier CY7C251 CY7C251­55QMB 55QMB Q55 32-Pin Windowed Rectangular Leadless Chip Carrier CY7C251 CY7C251­55WMB 55WMB W22 28-Lead (300-Mil) Windowed CerDIP CY7C251 CY7C251­65PC P21 28-Lead (300-Mil) Molded DIP CY7C251 CY7C251­65WC W22 28-Lead (300-Mil) Windowed CerDIP CY7C251 CY7C251­65DMB 65DMB D22 28-Lead (300-Mil) CerDIP CY7C251 CY7C251­65LMB 65LMB L55 32-Pin Rectangular Leadless Chip Carrier CY7C251 CY7C251­65QMB 65QMB Q55 32-Pin Windowed Rectangular Leadless Chip Carrier CY7C251 CY7C251­65WMB 65WMB 45 W22 CY7C251 CY7C251­45WMB 45WMB Speed (ns) 28-Lead (300-Mil) Molded DIP CY7C251 CY7C251­45DMB 45DMB 65 P21 CY7C251 CY7C251­45WC 55 CY7C251 CY7C251­45PC W22 28-Lead (300-Mil) Windowed CerDIP Ordering Code Package Name Package Type P15 28-Lead (600-Mil) Molded DIP W16 D16 28-Lead (600-Mil) CerDIP CY7C254 CY7C254­45WMB 45WMB W16 P15 28-Lead (600-Mil) Molded DIP CY7C254 CY7C254­55WC W16 D16 28-Lead (600-Mil) CerDIP CY7C254 CY7C254­55QMB 55QMB Q55 W16 P15 28-Lead (600-Mil) Molded DIP CY7C254 CY7C254­65WC W16 D16 28-Lead (600-Mil) CerDIP CY7C254 CY7C254­65QMB 65QMB Q55 W16 Operating Range 32-Pin Windowed Rectangular Leadless Chip Carrier CY7C254 CY7C254­65WMB 65WMB Military 28-Lead (600-Mil) Windowed CerDIP CY7C254 CY7C254­65DMB 65DMB Commercial 28-Lead (600-Mil) Windowed CerDIP CY7C254 CY7C254­65PC Military 32-Pin Windowed Rectangular Leadless Chip Carrier CY7C254 CY7C254­55WMB 55WMB Commercial 28-Lead (600-Mil) Windowed CerDIP CY7C254 CY7C254­55DMB 55DMB Military 28-Lead (600-Mil) Windowed CerDIP CY7C254 CY7C254­55PC Commercial 28-Lead (600-Mil) Windowed CerDIP CY7C254 CY7C254­45DMB 45DMB 65 CY7C254 CY7C254­45PC CY7C254 CY7C254­45WC 55 Operating Range Commercial 28-Lead (600-Mil) Windowed CerDIP Military Commercial Military Commercial Military Note: 9. Most of these products are available in industrial temperature range. Contact a Cypress representative for specifications and product availability. 6 CY7C251 CY7C251 CY7C254 CY7C254 MILITARY SPECIFICATIONS Group A Subgroup Testing SMD Cross Reference SMD Number DC Characteristics Cypress Number Suffix 5962­8953701 VOH VOL VIH VIL IIX IOZ ICC ISB[10] Parameter Subgroups tAA CY7C251 CY7C251­55QMB 55QMB XX CY7C254 CY7C254­65WMB 65WMB ZX CY7C254 CY7C254­65TMB 65TMB VX CY7C254 CY7C254­65QMB 65QMB XX CY7C254 CY7C254­55WMB 55WMB ZX CY7C254 CY7C254­55TMB 55TMB VX CY7C254 CY7C254­55QMB 55QMB Notes: 10. 7C251 7C251 (CS 1 only). 11. 7C254 7C254 and 7C251 7C251 (CS2, CS 3 and CS4 only). 7, 8, 9, 10, 11 tACS1[11] tACS2[10] VX 5962­8953802 Switching Characteristics CY7C251 CY7C251­55TMB 55TMB 5962­8953802 1, 2, 3 ZX 5962­8953801 1, 2, 3 CY7C251 CY7C251­55WMB 55WMB 5962­8953801 1, 2, 3 YX 5962­8953801 1, 2, 3 CY7C251 CY7C251­65QMB 65QMB 5962­8953702 1, 2, 3 VX 5962­8953702 1, 2, 3 CY7C251 CY7C251­65TMB 65TMB 5962­8953702 1, 2, 3 ZX 5962­8953701 1, 2, 3 CY7C251 CY7C251­65WMB 65WMB 5962­8953701 Subgroups YX 5962­8953802 Parameter 7, 8, 9, 10, 11 7, 8, 9, 10, 11 Document #: 38­00056­G 7 CY7C251 CY7C251 CY7C254 CY7C254 Package Diagrams 28-Lead (300-Mil) CerDIP D22 MIL­STD­1835 D­ Config. A 15 28-Lead (600-Mil) CerDIP D16 MIL­STD­1835 D­10 Config.A 32-Pin Rectangular Leadless Chip Carrier L55 32-Pin Windowed Rectangular Leadless Chip Carrier Q55 MIL­STD­1835 C­12 MIL­STD­1835 C­12 8 CY7C251 CY7C251 CY7C254 CY7C254 Package Diagrams (continued) 28-Lead (600-Mil) Molded DIP P15 28-Lead (300-Mil) Molded DIP P21 9 CY7C251 CY7C251 CY7C254 CY7C254 Package Diagrams (continued) 28-Lead (600-Mil) Windowed CerDIP W16 MIL­STD­1835 D­10 Config. A 28-Lead (300-Mil) Windowed CerDIP W22 MIL­STD­1835 D­15 Config. A © Cypress Semiconductor Corporation, 1992. 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.