CAT28C65B 64K-Bit CMOS PARALLEL EEPROM FEATURES ■ Fast read access times: ■ Commercial, industrial and automotive – 90/120/150ns temperature ranges ■ Low power CMOS dissipation: ■ Automatic page write operation: – Active: 25 mA max. – Standby: 100 µA max. – 1 to 32 bytes in 5ms – Page load timer ■ Simple write operation: ■ End of write detection: – On-chip address and data latches – Self-timed write cycle with auto-clear – Toggle bit – DATA polling BUSY – RDY/BUSY ■ Fast write cycle time: – 5ms max ■ 100,000 program/erase cycles ■ CMOS and TTL compatible I/O ■ 100 year data retention ■ Hardware and software write protection DESCRIPTION The CAT28C65B is a fast, low power, 5V-only CMOS parallel EEPROM organized as 8K x 8-bits. It requires a simple interface for in-system programming. On-chip address and data latches, self-timed write cycle with auto-clear and VCC power up/down write protection eliminate additional timing and protection hardware. DATA Polling, a RDY/BUSY pin and Toggle status bits signal the start and end of the self-timed write cycle. Additionally, the CAT28C65B features hardware and software write protection. The CAT28C65B is manufactured using Catalyst’s advanced CMOS floating gate technology. It is designed to endure 100,000 program/erase cycles and has a data retention of 100 years. The device is available in JEDECapproved 28-pin DIP, 28-pin TSOP, 28-pin SOIC or 32pin PLCC packages. BLOCK DIAGRAM A5–A12 ADDR. BUFFER & LATCHES ROW DECODER VCC INADVERTENT WRITE PROTECTION HIGH VOLTAGE GENERATOR CE OE WE CONTROL LOGIC 32 BYTE PAGE REGISTER I/O BUFFERS TIMER A0–A4 8,192 x 8 EEPROM ARRAY DATA POLLING, TOGGLE BIT & RDY/BUSY LOGIC ADDR. BUFFER & LATCHES I/O0–I/O7 COLUMN DECODER RDY/BUSY © 2009 SCILLC. All rights reserved. Characteristics subject to change without notice 1 Doc. No. MD-1009, Rev. H CAT28C65B PIN CONFIGURATION DIP Package (P, L) SOIC Package (J, W) (K, X) RDY/BUSY A12 1 2 28 27 VCC WE A7 A6 3 4 26 25 NC A8 A5 5 6 24 A9 A11 A4 A3 23 22 7 8 A2 A1 A0 9 10 I/O0 I/O1 11 12 I/O2 VSS 13 14 21 20 19 18 17 16 15 RDY/BUSY A12 A7 A6 A5 A4 A3 A2 A1 OE A10 CE I/O7 A0 I/O0 I/O1 I/O2 VSS I/O6 I/O5 I/O4 I/O3 A6 A5 A4 A3 VCC WE NC 4 5 6 7 8 9 10 25 24 23 22 21 20 19 A8 A9 A11 OE 11 12 13 14 18 17 16 15 A10 CE I/O7 I/O6 I/O5 I/O4 I/O3 A8 A9 A11 NC OE A10 CE I/O7 OE A11 A9 A8 NC WE VCC RDY/BUSY A12 A7 A6 A5 A4 A3 28 27 26 25 24 23 22 21 20 19 18 17 16 15 1 2 3 4 5 6 7 8 9 10 11 12 13 14 A10 CE I/O7 I/O6 I/O5 I/O4 I/O3 GND I/O2 I/O1 I/O0 A0 A1 A2 I/O6 I/O1 I/O2 VSS NC I/O3 I/O4 I/O5 A2 A1 A0 NC I/O0 4 3 2 1 32 31 30 5 29 6 28 7 27 8 26 9 25 TOP VIEW 10 24 11 23 12 22 13 21 14 15 16 17 18 19 20 28 27 26 TSOP Package (8mm x 13.4mm) (H13) A7 A12 RDY/BUSY NC VCC WE NC PLCC Package (N, G) 1 2 3 PIN FUNCTIONS Pin Name Function Pin Name Function A0–A12 Address Inputs WE Write Enable I/O0–I/O7 Data Inputs/Outputs VCC 5 V Supply CE Chip Enable VSS Ground OE Output Enable NC No Connect RDY/BSY Ready/Busy Status Doc. No. MD-1009, Rev. H 2 © 2009 SCILLC. All rights reserved. Characteristics subject to change without notice CAT28C65B ABSOLUTE MAXIMUM RATINGS* *COMMENT Temperature Under Bias ................. –55°C to +125°C Stresses above those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions outside of those listed in the operational sections of this specification is not implied. Exposure to any absolute maximum rating for extended periods may affect device performance and reliability. Storage Temperature ....................... –65°C to +150°C Voltage on Any Pin with Respect to Ground(2) ........... –2.0V to +VCC + 2.0V VCC with Respect to Ground ............... –2.0V to +7.0V Package Power Dissipation Capability (Ta = 25°C) ................................... 1.0W Lead Soldering Temperature (10 secs) ............ 300°C Output Short Circuit Current(3) ........................ 100 mA RELIABILITY CHARACTERISTICS Symbol Parameter Min. Max. Units Test Method NEND(1) Endurance 105 Cycles/Byte MIL-STD-883, Test Method 1033 TDR(1) Data Retention 100 Years MIL-STD-883, Test Method 1008 VZAP(1) ESD Susceptibility 2000 Volts MIL-STD-883, Test Method 3015 ILTH(1)(4) Latch-Up 100 mA JEDEC Standard 17 MODE SELECTION Mode CE WE OE Read L H Byte Write (WE Controlled) L Byte Write (CE Controlled) I/O Power L DOUT ACTIVE H DIN ACTIVE L H DIN ACTIVE Standby, and Write Inhibit H X X High-Z STANDBY Read and Write Inhibit X H H High-Z ACTIVE Units Conditions CAPACITANCE TA = 25°C, F = 1.0 MHZ, VCC = 5V Symbol Test Max. CI/O(1) Input/Output Capacitance 10 pF VI/O = 0V CIN(1) Input Capacitance 6 pF VIN = 0V Note: (1) This parameter is tested initially and after a design or process change that affects the parameter. (2) The minimum DC input voltage is –0.5V. During transitions, inputs may undershoot to –2.0V for periods of less than 20 ns. Maximum DC voltage on output pins is VCC +0.5V, which may overshoot to VCC +2.0V for periods of less than 20 ns. (3) Output shorted for no more than one second. No more than one output shorted at a time. (4) Latch-up protection is provided for stresses up to 100mA on address and data pins from –1V to VCC +1V. © 2009 SCILLC. All rights reserved. Characteristics subject to change without notice 3 Doc. No. MD-1009, Rev. H CAT28C65B D.C. OPERATING CHARACTERISTICS VCC = 5V ±10%, unless otherwise specified. Limits Symbol Parameter Min. Typ. Max. Units Test Conditions ICC VCC Current (Operating, TTL) 30 mA CE = OE = VIL, f = 1/tRC min, All I/O’s Open ICCC(1) VCC Current (Operating, CMOS) 25 mA CE = OE = VILC, f = 1/tRC min, All I/O’s Open ISB VCC Current (Standby, TTL) 1 mA CE = VIH, All I/O’s Open ISBC(2) VCC Current (Standby, CMOS) 100 µA CE = VIHC, All I/O’s Open ILI Input Leakage Current –10 10 µA VIN = GND to VCC ILO Output Leakage Current –10 10 µA VOUT = GND to VCC, CE = VIH VIH(2) High Level Input Voltage 2 VCC +0.3 V VIL(1) Low Level Input Voltage –0.3 0.8 V VOH High Level Output Voltage 2.4 VOL Low Level Output Voltage VWI Write Inhibit Voltage 0.4 3.5 V IOH = –400µA V IOL = 2.1mA V Note: (1) VILC = –0.3V to +0.3V. (2) VIHC = VCC –0.3V to VCC +0.3V. Doc. No. MD-1009, Rev. H 4 © 2009 SCILLC. All rights reserved. Characteristics subject to change without notice CAT28C65B A.C. CHARACTERISTICS, Read Cycle VCC = 5V ±10%, unless otherwise specified. Symbol Parameter 28C65B-90 28C65B-12 28C65B-15 Min. Min. Min. Max. 90 Max. 120 Max. tRC Read Cycle Time tCE CE Access Time 90 120 150 ns tAA Address Access Time 90 120 150 ns tOE OE Access Time 50 60 70 ns tLZ(1) CE Low to Active Output 0 0 0 ns tOLZ(1) OE Low to Active Output 0 0 0 ns tHZ(1)(2) CE High to High-Z Output 50 50 50 ns tOHZ(1)(2) OE High to High-Z Output 50 50 50 ns tOH(1) Output Hold from Address Change 0 150 Units 0 0 ns ns Figure 1. A.C. Testing Input/Output Waveform(3) 2.4 V 2.0 V INPUT PULSE LEVELS REFERENCE POINTS 0.8 V 0.45 V Figure 2. A.C. Testing Load Circuit (example) 1.3V 1N914 3.3K DEVICE UNDER TEST OUT CL = 100 pF CL INCLUDES JIG CAPACITANCE Note: (1) This parameter is tested initially and after a design or process change that affects the parameter. (2) Output floating (High-Z) is defined as the state when the external data line is no longer driven by the output buffer. (3) Input rise and fall times (10% and 90%) < 10 ns. © 2009 SCILLC. All rights reserved. Characteristics subject to change without notice 5 Doc. No. MD-1009, Rev. H CAT28C65B A.C. CHARACTERISTICS, Write Cycle VCC = 5V ±10%, unless otherwise specified. Symbol Parameter 28C65B-90 28C65B-12 28C65B-15 Min. Min. Min. Max. 5 Max. 5 Max. Units 5 ms tWC Write Cycle Time tAS Address Setup Time 0 0 0 ns tAH Address Hold Time 100 100 100 ns tCS CE Setup Time 0 0 0 ns tCH CE Hold Time 0 0 0 ns tCW(2) CE Pulse Time 110 110 110 ns tOES OE Setup Time 0 0 0 ns tOEH OE Hold Time 0 0 0 ns tWP(2) OE Pulse Width 110 110 110 ns tRB WE Low to RDY/BUSY Low tDS Data Setup Time 60 60 60 ns tDH Data Hold Time 0 0 0 ns tINIT(1) Write Inhibit Period After Power-up 5 10 5 10 5 10 ms tBLC(1)(3) Byte Load Cycle Time .05 100 .05 100 .05 100 µs 120 120 120 ns Note: (1) This parameter is tested initially and after a design or process change that affects the parameter. (2) A write pulse of less than 20ns duration will not initiate a write cycle. (3) A timer of duration tBLC max. begins with every LOW to HIGH transition of WE. If allowed to time out, a page or byte write will begin; however a transition from HIGH to LOW within tBLC max. stops the timer. Doc. No. MD-1009, Rev. H 6 © 2009 SCILLC. All rights reserved. Characteristics subject to change without notice CAT28C65B can be used to eliminate bus contention in a system environment. DEVICE OPERATION Read Byte Write Data stored in the CAT28C65B is transferred to the data bus when WE is held high, and both OE and CE are held low. The data bus is set to a high impedance state when either CE or OE goes high. This 2-line control architecture A write cycle is executed when both CE and WEare low, and OE is high. Write cycles can be initiated using either WE or CE, with the address input being latched on the Figure 3. Read Cycle tRC ADDRESS tCE CE tOE OE VIH tLZ WE tOHZ HIGH-Z DATA OUT tHZ tOH tOLZ DATA VALID DATA VALID tAA WE Controlled] Figure 4. Byte Write Cycle [WE tWC ADDRESS tAS tAH tCH tCS CE OE tOES tWP tOEH WE tRB RDY/BUSY tBLC HIGH-Z DATA OUT DATA IN HIGH-Z HIGH-Z DATA VALID tDS © 2009 SCILLC. All rights reserved. Characteristics subject to change without notice tDH 7 Doc. No. MD-1009, Rev. H CAT28C65B falling edge of WE or CE, whichever occurs last. Data, conversely, is latched on the rising edge of WE or CE, whichever occurs first. Once initiated, a byte write cycle automatically erases the addressed byte and the new data is written within 5 ms. cycle. This effectively reduces the byte-write time by a factor of 32. Following an initial WRITE operation (WE pulsed low, for tWP, and then high) the page write mode can begin by issuing sequential WE pulses, which load the address and data bytes into a 32 byte temporary buffer. The page address where data is to be written, specified by bits A5 to A12, is latched on the last falling edge of WE. Each byte within the page is defined by address bits A0 to A4 Page Write The page write mode of the CAT28C65B (essentially an extended BYTE WRITE mode) allows from 1 to 32 bytes of data to be programmed within a single EEPROM write Figure 5. Byte Write Cycle [CE Controlled] tWC ADDRESS tAS tAH tBLC tCW CE tOEH OE tOES tCS tCH WE tRB RDY/BUSY HIGH-Z HIGH-Z HIGH-Z DATA OUT DATA IN DATA VALID tDS tDH Figure 6. Page Mode Write Cycle OE CE t BLC t WP WE ADDRESS t WC I/O LAST BYTE BYTE 0 Doc. No. MD-1009, Rev. H BYTE 1 BYTE 2 8 BYTE n BYTE n+1 BYTE n+2 © 2009 SCILLC. All rights reserved. Characteristics subject to change without notice CAT28C65B (which can be loaded in any order) during the first and subsequent write cycles. Each successive byte load cycle must begin within tBLC MAX of the rising edge of the preceding WE pulse. There is no page write window limitation as long as WE is pulsed low within tBLC MAX. are indeterminate) until the programming cycle is complete. Upon completion of the self-timed write cycle, all I/O’s will output true data during a read cycle. Toggle Bit In addition to the DATA Polling feature, the device offers an additional method for determining the completion of a write cycle. While a write cycle is in progress, reading data from the device will result in I/O6 toggling between one and zero. However, once the write is complete, I/O6 stops toggling and valid data can be read from the device. Upon completion of the page write sequence, WE must stay high a minimum of tBLC MAX for the internal automatic program cycle to commence. This programming cycle consists of an erase cycle, which erases any data that existed in each addressed cell, and a write cycle, which writes new data back into the cell. A page write will only write data to the locations that were addressed and will not rewrite the entire page. Ready/BUSY (RDY/BUSY) The RDY/BUSY pin is an open drain output which indicates device status during programming. It is pulled low during the write cycle and released at the end of programming. Several devices may be OR-tied to the same RDY/BUSY line. DATA Polling DATA polling is provided to indicate the completion of write cycle. Once a byte write or page write cycle is initiated, attempting to read the last byte written will output the complement of that data on I/O7 (I/O0–I/O6 Figure 7. DATA Polling ADDRESS CE WE tOEH tOES tOE OE tWC I/O7 DIN = X DOUT = X DOUT = X Figure 8. Toggle Bit WE CE tOEH tOES tOE OE I/O6 (1) (1) tWC © 2009 SCILLC. All rights reserved. Characteristics subject to change without notice 9 Doc. No. MD-1009, Rev. H CAT28C65B HARDWARE DATA PROTECTION (4) Noise pulses of less than 20 ns on the WE or CE inputs will not result in a write cycle. The following is a list of hardware data protection features that are incorporated into the CAT28C65B. SOFTWARE DATA PROTECTION (1) VCC sense provides for write protection when VCC falls below 3.5V min. The CAT28C65B features a software controlled data protection scheme which, once enabled, requires a data algorithm to be issued to the device before a write can be performed. The device is shipped from Catalyst with the software protection NOT ENABLED (the CAT28C65B is in the standard operating mode). (2) A power on delay mechanism, tINIT (see AC characteristics), provides a 5 to 10 ms delay before a write sequence, after VCC has reached 3.5V min. (3) Write inhibit is activated by holding any one of OE low, CE high or WE high. Figure 9. Write Sequence for Activating Software Data Protection WRITE DATA: ADDRESS: WRITE DATA: ADDRESS: WRITE DATA: ADDRESS: Figure 10. Write Sequence for Deactivating Software Data Protection WRITE DATA: AA ADDRESS: 1555 WRITE DATA: 55 ADDRESS: 0AAA WRITE DATA: A0 1555 ADDRESS: SOFTWARE DATA (1) PROTECTION ACTIVATED WRITE DATA: WRITE DATA: XX WRITE DATA: TO ANY ADDRESS ADDRESS: WRITE LAST BYTE TO LAST ADDRESS WRITE DATA: ADDRESS: ADDRESS: AA 1555 55 0AAA 80 1555 AA 1555 55 0AAA 20 1555 Note: (1) Write protection is activated at this point whether or not any more writes are completed. Writing to addresses must occur within tBLC Max., after SDP activation. Doc. No. MD-1009, Rev. H 10 © 2009 SCILLC. All rights reserved. Characteristics subject to change without notice CAT28C65B To activate the software data protection, the device must be sent three write commands to specific addresses with specific data (Figure 9). This sequence of commands (along with subsequent writes) must adhere to the page write timing specifications (Figure 11). Once this is done, all subsequent byte or page writes to the device must be preceded by this same set of write commands. The data protection mechanism is activated until a deactivate sequence is issued regardless of power on/off transitions. This gives the user added inadvertent write protection on power-up in addition to the hardware protection provided. To allow the user the ability to program the device with an EEPROM programmer (or for testing purposes) there is a software command sequence for deactivating the data protection. The six step algorithm (Figure 10) will reset the internal protection circuitry, and the device will return to standard operating mode (Figure 12 provides reset timing). After the sixth byte of this reset sequence has been issued, standard byte or page writing can commence. Figure 11. Software Data Protection Timing DATA ADDRESS AA 1555 55 0AAA tWC A0 1555 BYTE OR PAGE CE tWP tBLC WRITES ENABLED WE Figure 12. Resetting Software Data Protection Timing DATA ADDRESS AA 1555 55 0AAA 80 1555 AA 1555 55 0AAA 20 1555 tWC SDP RESET CE DEVICE UNPROTECTED WE Speed 90: 90ns 12: 120ns 15: 150ns © 2009 SCILLC. All rights reserved. Characteristics subject to change without notice 11 Doc. No. MD-1009, Rev. H CAT28C65B (1) EXAMPLE OF ORDERING INFORMATION Prefix Device # Suffix CAT 28C65B N Optional Company ID Product Number I -15 Tape & Reel Temperature Range Blank = Commercial (0˚C to +70˚C) I = Industrial (-40˚C to +85˚C) A = Automotive (-40˚ to +105˚C)(3) Package P: PDIP(2) J: SOIC (JEDEC)(2) K: SOIC (EIAJ)(2) N: PLCC(2) L: PDIP (Lead free, Halogen free) W: SOIC (JEDEC) (Lead free, Halogen free) X: SOIC (EIAJ) (Lead free, Halogen free) G: PLCC (Lead free, Halogen free) H13: TSOP (Lead free, Halogen free) T Speed 90: 90ns 12: 120ns 15: 150ns ORDERING INFORMATION Orderable Part Numbers (for Pb-Free Devices) CAT28C65BGI-12T CAT28C65BLA12 CAT28C65BGI-15T CAT28C65BLA15 CAT28C65BGI-90T CAT28C65BLA90 CAT28C65BGA-12T CAT28C65BWI-12T CAT28C65BGA-15T CAT28C65BWI-15T CAT28C65BGA-90T CAT28C65BWI-90T CAT28C65BH13I12T CAT28C65BWA-12T CAT28C65BH13I15T CAT28C65BWA-15T CAT28C65BH13I90T CAT28C65BWA-90T CAT28C65BH13A12T CAT28C65BXI-12T CAT28C65BH13A15T CAT28C65BXI-15T CAT28C65BH13A90T CAT28C65BXI-90T CAT28C65BLI12 CAT28C65BXA-12T CAT28C65BLI15 CAT28C65BXA-15T CAT28C65BLI90 CAT28C65BXA-90T Notes: (1) The device used in the above example is a CAT28C65BNI-15T (PLCC, Industrial temperature, 150 ns Access Time, Tape & Reel). (2) Solder-plate (tin-lead) packages, contact Factory for availability. (3) -40°C to +125°C is available upon request. Doc. No. MD-1009, Rev. H 12 © 2009 SCILLC. All rights reserved. Characteristics subject to change without notice CAT28C65B REVISION HISTORY Date Revision Description 29-Mar-04 B Added Green packages in all areas. 19-Apr-04 C Delete data sheet designation Update Block Diagram Update Ordering Information Update Revision History Update Rev Number 17-Nov-04 D Added 90: 90ns speed to Ordering Information 29-Mar-05 E Update A.C. Characteristics, Write Cycle 15-Oct-08 F Eliminate TSOP (8mm x 13.4mm) SnPb package. 19-Nov-08 G Change logo and fine print to ON Semiconductor 28-Jul-09 H Update Example of Ordering Information Update Ordering Information table ON Semiconductor and are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. “Typical” parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. SCILLC does not convey any license under its patent rights nor the rights of others. SCILLC products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the SCILLC product could create a situation where personal injury or death may occur. Should Buyer purchase or use SCILLC products for any such unintended or unauthorized application, Buyer shall indemnify and hold SCILLC and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that SCILLC was negligent regarding the design or manufacture of the part. SCILLC is an Equal Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner. PUBLICATION ORDERING INFORMATION LITERATURE FULFILLMENT: Literature Distribution Center for ON Semiconductor P.O. Box 5163, Denver, Colorado 80217 USA Phone: 303-675-2175 or 800-344-3860 Toll Free USA/Canada Fax: 303-675-2176 or 800-344-3867 Toll Free USA/Canada Email: [email protected] © 2009 SCILLC. All rights reserved. Characteristics subject to change without notice N. American Technical Support: 800-282-9855 Toll Free USA/Canada Europe, Middle East and Africa Technical Support: Phone: 421 33 790 2910 Japan Customer Focus Center: Phone: 81-3-5773-3850 13 ON Semiconductor Website: www.onsemi.com Order Literature: http://www.onsemi.com/orderlit For additional information, please contact your local Sales Representative Doc. No. MD-1009, Rev. H