X28HC256P-15 Xicor, X28HC256P-15 Datasheet
X28HC256P-15
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X28HC256P-15 Summary of contents
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... T1/C0/D0 EW X28HC256 5 Volt, Byte Alterable E DESCRIPTION The X28HC256 is a second generation high perfor- mance CMOS 32K Xicor’s proprietary, textured poly floating gate tech- Control nology, providing a highly reliable 5 Volt only nonvolatile PP memory. The X28HC256 supports a 128-byte page write opera- ...
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X28HC256 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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X28HC256 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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X28HC256 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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X28HC256 THE TOGGLE BIT I/O 6 Figure 4. Toggle Bit Bus Sequence LAST WRITE I I/O 6 beginning and ending state of I/O 6 will vary. Figure 5. Toggle Bit Software Flow ...
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... SOFTWARE DATA PROTECTION The X28HC256 offers a software controlled data protec- tion feature. The X28HC256 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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X28HC256 SOFTWARE DATA PROTECTION Figure 6. Timing Sequence—Byte or Page Write DATA AA ADDRESS 5555 CE WE Figure 7. Write Sequence for Software Data Protection WRITE DATA AA TO ADDRESS 5555 WRITE DATA 55 TO ADDRESS 2AAA ...
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X28HC256 RESETTING SOFTWARE DATA PROTECTION Figure 8. Reset Software Data Protection Timing Sequence V CC DATA AA 55 ADDRESS 5555 2AAA CE WE Figure 9. Write Sequence for resetting Software Data Protection WRITE DATA AA TO ADDRESS 5555 WRITE DATA ...
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X28HC256 SYSTEM CONSIDERATIONS Because the X28HC256 is frequently used in large memory arrays it is provided with a two line control architecture for both read and write operations. Proper usage can provide the lowest possible power dissipation and eliminate the ...
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X28HC256 ABSOLUTE MAXIMUM RATINGS* Temperature under Bias X28HC256 .................................. – +85 C X28HC256I, X28HC256M ......... – +135 C Storage Temperature ....................... – +150 C Voltage on any Pin with Respect to V .................................. –1V ...
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X28HC256 POWER-UP TIMING Symbol PUR (3) t PUW (3) t CAPACITANCE 1MHz Symbol I/O (9) C Input/Output Capacitance IN (9) C Input Capacitance ENDURANCE AND DATA RETENTION Parameter Endurance Data Retention A.C. ...
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X28HC256 A.C. CHARACTERISTICS (Over the recommended operating conditions, unless otherwise specified.) Read Cycle Limits Symbol Parameter RC (5) t Read Cycle Time CE (5) t Chip Enable Access Time AA (5) t Address Access Time t Output Enable Access Time ...
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X28HC256 Write Cycle Limits Symbol WC (7) t Write Cycle Time 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 Time ...
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X28HC256 CE Controlled Write Cycle ADDRESS OES DATA IN DATA OUT Page Write Cycle ( (10) ADDRESS I/O BYTE 0 *For each successive write within the page ...
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X28HC256 DATA Polling Timing Diagram (11 ADDRESS I/O 7 Toggle Bit Timing Diagram (11 OEH OE HIGH Z I/O 6 *I/O beginning and ending state will vary, depending upon ...
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X28HC256 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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X28HC256 PACKAGING INFORMATION 28-LEAD HERMETIC DUAL IN-LINE PACKAGE TYPE D PIN 1 SEATING PLANE 0.200 (5.08) 0.125 (3.18) 0.110 (2.79) 0.090 (2.29) TYP. 0.100 (2.54) TYP. 0.010 (0.25) NOTE: ALL DIMENSIONS IN INCHES (IN PARENTHESES IN MILLIMETERS) 1.490 (37.85) 1.435 ...
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X28HC256 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) REF. PIN 1 NOTES: 1. ALL DIMENSIONS ...
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X28HC256 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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X28HC256 PACKAGING INFORMATION 32-PAD CERAMIC LEADLESS CHIP CARRIER PACKAGE TYPE E 0.150 (3.81) BSC 0.015 (0.38) 0.003 (0.08) 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) 32 NOTE: 1. ...
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X28HC256 PACKAGING INFORMATION 28-LEAD CERAMIC PIN GRID ARRAY PACKAGE TYPE 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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X28HC256 PACKAGING INFORMATION 0.740 (18.80) MAX. 0.006 (0.15) 0.003 (0.08) 0.370 (9.40) 0.250 (6.35) TYP. 0.300 2 PLCS. NOTE: ALL DIMENSIONS IN INCHES (IN PARENTHESES IN MILLIMETERS) 28-LEAD CERAMIC FLAT PACK PIN 1 INDEX 1 28 0.440 (11.18) MAX. 0.180 ...
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X28HC256 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. ...