X28C64P-20 Xicor, X28C64P-20 Datasheet
X28C64P-20
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X28C64P-20 Summary of contents
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... The X28C64 also features DATA and Toggle Bit Polling, a system software support scheme used to indicate the early completion of a write cycle. In addi- tion, the X28C64 includes a user-optional software data protection mode that further enhances Xicor’s hard- ware write protect capability. 2 Xicor E PROMs are designed and tested for applica- tions requiring extended endurance ...
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X28C64 PIN DESCRIPTIONS Addresses (A – The Address inputs select an 8-bit memory location during a read or write operation. Chip Enable (CE) The Chip Enable input must be LOW to enable all read/ write operations. When ...
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X28C64 DEVICE OPERATION Read Read operations are initiated by both OE and CE LOW. The read operation is terminated by either returning HIGH. This two line control architecture elimi- nates bus contention in a system environment. The ...
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X28C64 DATA Polling I/O 7 Figure 2. DATA Polling Bus Sequence LAST WRITE I – Figure 3. DATA Polling Software Flow WRITE DATA WRITES COMPLETE? YES SAVE LAST DATA ...
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X28C64 The Toggle Bit I/O 6 Figure 4. Toggle Bit Bus Sequence LAST WRITE I Beginning and ending state of I/O 6 will vary. Figure 5. Toggle Bit Software Flow LAST WRITE LOAD ACCUM ...
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... SOFTWARE DATA PROTECTION The X28C64 offers a software controlled data protection feature. The X28C64 is shipped from Xicor with the software data protection NOT ENABLED; that is, the device will be in the standard operating mode. In this mode data should be protected during power-up/-down operations through the use of external circuits ...
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X28C64 Software Data Protection Figure 6. Timing Sequence—Byte or Page Write DATA AA ADDRESS 1555 CE WE Figure 7. Write Sequence for Software Data Protection WRITE DATA AA TO ADDRESS 1555 WRITE DATA 55 TO ADDRESS 0AAA ...
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X28C64 Resetting Software Data Protection Figure 8. Reset Software Data Protection Timing Sequence V CC DATA AA 55 ADDRESS 1555 0AAA CE WE Figure 9. Software Sequence to Deactivate Software Data Protection WRITE DATA AA TO ADDRESS 1555 WRITE DATA ...
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X28C64 SYSTEM CONSIDERATIONS Because the X28C64 is frequently used in large memory arrays provided with a two line control architecture for both read and write operations. Proper usage can provide the lowest possible power dissipation and elimi- nate ...
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X28C64 ABSOLUTE MAXIMUM RATINGS* Temperature under Bias X28C64 ........................................ – +85 C X28C64I, X28C64M ................... – +135 C Storage Temperature ....................... – +150 C Voltage on any Pin with Respect ....................................... ...
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X28C64 ENDURANCE AND DATA RETENTION Parameter Minimum Endurance Data Retention POWER-UP TIMING Symbol (3) t Power-up to Read Operation PUR (3) t Power-up to Write Operation PUW CAPACITANCE 1MHz Symbol (3) C ...
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X28C64 A.C. CHARACTERISTICS (Over recommended operating conditions, unless otherwise specified.) Read Cycle Limits Symbol Parameter t Read Cycle Time RC t Chip Enable Access Time CE t Address Access Time AA t Output Enable Access Time OE (4) CE LOW ...
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X28C64 WRITE CYCLE LIMITS Symbol Parameter (5) t Write Cycle Time WC t Address Setup Time AS t Address Hold Time AH t Write Setup Time CS t Write Hold Time CH CE Pulse Width HIGH Setup ...
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X28C64 CE Controlled Write Cycle ADDRESS OES DATA IN DATA OUT Page Write Cycle ( (9) ADDRESS * I/O BYTE 0 *For each successive write within the ...
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X28C64 DATA Polling Timing Diagram (10 ADDRESS I/O 7 (10) Toggle Bit Timing Diagram OEH OE HIGH Z I Starting and ending state of I/O 6 ...
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X28C64 NOTES 16 ...
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X28C64 PACKAGING INFORMATION 28-LEAD PLASTIC DUAL IN-LINE PACKAGE TYPE P PIN 1 INDEX PIN 1 SEATING PLANE 0.150 (3.81) 0.125 (3.17) 0.110 (2.79) 0.090 (2.29) TYP. 0.010 (0.25) NOTE: ALL DIMENSIONS IN INCHES (IN PARENTHESES IN MILLIMETERS) 1.460 (37.08) 1.400 ...
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X28C64 PACKAGING INFORMATION 28-LEAD HERMETIC DUAL IN-LINE PACKAGE TYPE D SEATING 0.200 (5.08) 0.125 (3.18) NOTE: ALL DIMENSIONS IN INCHES (IN PARENTHESES IN MILLIMETERS) 1.490 (37.85) 1.435 (36.45) PIN 1 1.30 (33.02) REF. PLANE 0.070 (1.78) 0.030 (0.76) 0.110 (2.79) ...
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X28C64 PACKAGING INFORMATION 32-LEAD PLASTIC LEADED CHIP CARRIER PACKAGE TYPE J 0.420 (10.67) 0.045 (1.14 0.495 (12.57) 0.485 (12.32) TYP. 0.490 (12.45) 0.453 (11.51) 0.447 (11.35) TYP. 0.450 (11.43) 0.300 (7.62) PIN 1 0.050 (1.27) TYP. 0.021 (0.53) ...
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X28C64 PACKAGING INFORMATION 28-LEAD PLASTIC SMALL OUTLINE GULL WING PACKAGE TYPE S 0.1040 (2.6416) 0.0940 (2.3876) 0 – 8 NOTES: 1. ALL DIMENSIONS IN INCHES (IN PARENTHESES IN MILLIMETERS) 2. FORMED LEAD SHALL BE PLANAR WITH RESPECT TO ONE ANOTHER ...
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X28C64 PACKAGING INFORMATION 32-PAD CERAMIC LEADLESS CHIP CARRIER PACKAGE TYPE E PIN 1 0.200 (5.08) BSC 0.028 (0.71) 0.022 (0.56) (32) PLCS. 0.458 (11.63) 0.442 (11.22) 0.458 (11.63) 0.300 (7.62) NOTE: 1. ALL DIMENSIONS IN INCHES (IN PARENTHESES IN MILLIMETERS) ...
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X28C64 PACKAGING INFORMATION 28-LEAD CERAMIC PIN GRID ARRAY PACKAGE TYPE K TYP. 0.100 ALL LEADS PIN 1 INDEX 0.660 (16.76) 0.640 (16.26) NOTE: ALL DIMENSIONS IN INCHES (IN PARENTHESES IN MILLIMETERS ...
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X28C64 PACKAGING INFORMATION 0.740 (18.80) MAX. 0.006 (0.15) 0.003 (0.08) TYP. 0.300 2 PLCS. NOTE: ALL DIMENSIONS IN INCHES (IN PARENTHESES IN MILLIMETERS) 28-LEAD CERAMIC FLAT PACK PIN 1 INDEX 1 0.440 (11.18) MAX. 0.370 (9.40) 0.250 (6.35) 0.180 (4.57) ...
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X28C64 PACKAGING INFORMATION SEE NOTE 2 8.02 (0.315) 7.98 (0.314) 1.18 (0.046) 1.02 (0.040) 0.58 (0.023) 0.42 (0.017) SOLDER PADS FOOTPRINT NOTE: 1. ALL DIMENSIONS ARE SHOWN IN MILLIMETERS (INCHES IN PARENTHESES). 32-LEAD THIN SMALL OUTLINE PACKAGE (TSOP) TYPE T ...
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... LIMITED WARRANTY Devices sold by Xicor, Inc. are covered by the warranty and patent indemnification provisions appearing in its Terms of Sale only. Xicor, Inc. makes no warranty, express, statutory, implied description regarding the information set forth herein or regarding the freedom of the described devices from patent infringement. ...