CAT28F020 CATALYST [Catalyst Semiconductor], CAT28F020 Datasheet
CAT28F020
Available stocks
Related parts for CAT28F020
CAT28F020 Summary of contents
Page 1
... Seconds Typical Chip Program 0.5 Seconds Typical Chip-Erase 12.0V 5% Programming and Erase Voltage DESCRIPTION The CAT28F020 is a high speed 256K x 8-bit electrically erasable and reprogrammable Flash memory ideally suited for applications requiring in-system or after-sale code updates. Electrical erasure of the full memory contents is achieved typically within 0.5 second. ...
Page 2
... CAT28F020 PIN CONFIGURATION DIP Package ( ...
Page 3
... Units 100K Cycles/Byte 10 Years 2000 Volts 100 mA Limits Min Max 2.0V for periods of less than 20ns CAT28F020 Test Method MIL-STD-883, Test Method 1033 MIL-STD-883, Test Method 1008 MIL-STD-883, Test Method 3015 JEDEC Standard 17 Units Conditions OUT +1V ...
Page 4
... CAT28F020 D.C. OPERATING CHARACTERISTICS V = +5V 10%, unless otherwise specified. CC Symbol Parameter I Input Leakage Current LI I Output Leakage Current Standby Current CMOS SB1 Standby Current TTL SB2 Active Read Current CC1 CC ( Programming Current CC2 CC ( Erase Current CC3 ...
Page 5
... Min. Max (3)(4)(5) Figure 2. Highspeed A.C. Testing Input/Output 3.0 V REFERENCE POINTS INPUT PULSE LEVELS 0.0 V Testing Load Circuit (example) DEVICE UNDER TEST 5 CAT28F020 Limits Max. Unit 4.5 5.5 0 6.5 12.6 (7) (7) 28F020-12 Min. Max. Min. Max. Unit 90 120 ns 90 120 ns 90 120 ...
Page 6
... CAT28F020 A.C. CHARACTERISTICS, Program/Erase Operation V = +5V 10%, unless otherwise specified. CC JEDEC Standard Symbol Symbol Parameter t t Write Cycle Time AVAV Address Setup Time AVWL Address Hold Time WLAX Data Setup Time DVWH Data Hold Time WHDX Setup Time ...
Page 7
... Read X 90H Read X 20H Write A A0H Read IN X 40H Write X C0H Read X FFH Write , PPL PPH 7 CAT28F020 I/O Notes D OUT High-Z High-Z 31H 12V BDH 12V See Command Table IN D During Write Cycle IN D During Write Cycle ...
Page 8
... A Read cycle from address 0001H retrieves the binary code for the device on outputs I/O 28F020 Code = 1011 1101 (BDH) Standby Mode With logic-high level, the CAT28F020 is placed in a standby mode where most of the device circuitry is disabled, thereby substantially reducing power con- sumption. The outputs are placed in a high-impedance ...
Page 9
... ERASE VERIFY COMMAND COMMAND WHWH2 DATA IN DATA IN = 20H = A0H 9 CAT28F020 to I ERASE V CC POWER-DOWN/ VERIFICATION STANDBY EHQZ WHGL OLZ VALID t LZ DATA OUT ...
Page 10
... CAT28F020 (1) Figure 5. Chip Erase Algorithm START ERASURE APPLY V PPH PROGRAM ALL BYTES TO 00H INITIALIZE ADDRESS INITIALIZE PLSCNT = 0 WRITE ERASE SETUP COMMAND WRITE ERASE COMMAND TIME OUT 10ms WRITE ERASE VERIFY COMMAND TIME OUT 6 s INCREMENT ADDRESS READ DATA FROM DEVICE DATA = ...
Page 11
... PROGRAM & DATA VERIFY PROGRAMMING COMMAND WHWH1 DATA IN 11 CAT28F020 . Refer to AC Characteristics (Program/ CC PROGRAM V CC POWER-DOWN/ VERIFICATION STANDBY EHQZ WHGL OLZ DATA IN = C0H VALID ...
Page 12
... CAT28F020 Figure 7. Programming Algorithm START PROGRAMMING APPLY V PPH INITIALIZE ADDRESS PLSCNT = 0 WRITE SETUP PROG. COMMAND WRITE PROG. CMD ADDR AND DATA TIME OUT 10 s WRITE PROGRAM VERIFY COMMAND TIME OUT 6 s READ DATA FROM DEVICE VERIFY DATA ? YES NO LAST INCREMENT ADDRESS? ...
Page 13
... In other words, V may power up in any order. Additionally V hardwired to V independent of the state of V PPH any power up/down cycling. The internal command register of the CAT28F020 is reset to the Read Mode on power up. Figure 8. Alternate A.C. Timing for Program Operation SETUP PROGRAM V CC POWER-UP COMMAND & ...
Page 14
... Device # CAT 28F020 Product Number Optional Company ID * -40˚ to +125˚ is available upon request. Note: (1) The device used in the above example is a CAT28F020NI-12T (PLCC, Industrial Temperature, 120 ns access time, Tape & Reel). Doc. No. 25037-00 2/98 F-1 28F020-90 28F020-70 Max. Min. Max. Min ...