AT28C256E-20PI ATMEL Corporation, AT28C256E-20PI Datasheet
AT28C256E-20PI
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AT28C256E-20PI Summary of contents
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... Description The AT28C256 is a high-performance Electrically Erasable and Programmable Read Only Memory. Its 256K of memory is organized as 32,768 words by 8 bits. Manufac- tured with Atmel’s advanced nonvolatile CMOS technology, the device offers access times to 150 ns with power dissipation of just 440 mW. When the device is deselected, the CMOS standby current is less than 200 A ...
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Description (Continued) The AT28C256 is accessed like a Static RAM for the read or write cycle without the need for external components. The device contains a 64-byte page register to allow writ- ing 64-bytes simultaneously. During a ...
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... All command se- quences must conform to the page write timing specifica- tions. The data in the enable and disable command se- quences is not written to the device and the memory ad- dresses used in the sequence may be written with data in either a byte or page write operation. ...
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... Device Operation (Continued) DEVICE IDENTIFICATION PROM memory are available to the user for device identification. By raising A9 to 12V dress locations 7FC0H to 7FFFH the additional bytes may be written to or read from in the same manner as the regu- lar memory array ...
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AC Read Characteristics Symbol Parameter t Address to Output Delay ACC ( Output Delay CE ( Output Delay OE ( Output Float DF Output Hold from OE, CE ...
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AC Write Characteristics Symbol Parameter Address, OE Set-up Time AS OES t Address Hold Time AH t Chip Select Set-up Time CS t Chip Select Hold Time CH t Write Pulse Width ( ...
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Page Mode Characteristics Symbol Parameter t Write Cycle Time WC t Address Set-up Time AS t Address Hold Time AH t Data Set-up Time DS t Data Hold Time DH t Write Pulse Width WP t Byte Load Cycle Time ...
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Software Data Protection Enable Algorithm LOAD DATA AA TO ADDRESS 5555 LOAD DATA 55 TO ADDRESS 2AAA LOAD DATA A0 TO ADDRESS 5555 LOAD DATA XX TO (4) ANY ADDRESS LOAD LAST BYTE TO LAST ADDRESS Notes for software program ...
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Data Polling Characteristics Symbol Parameter t Data Hold Time Hold Time OEH Output Delay OE t Write Recovery Time WR Notes: 1. These parameters are characterized and not 100% tested. Data Polling Waveforms Toggle ...
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AT28C256 2-226 ...
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Ordering Information t I (mA) ACC CC Active Standby (ns) 150 50 0.2 50 0.3 200 50 0.2 50 0.3 250 50 0.2 50 0.3 50 0.2 Ordering Code Package AT28C256(E,F)-15JC AT28C256(E,F)-15PC 28P6 AT28C256(E,F)-15SC 28S AT28C256(E,F)-15TC AT28C256(E,F)-15JI AT28C256(E,F)-15PI 28P6 ...
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Ordering Information (Continued (mA) ACC CC Active Standby (ns) (3) 150 50 0.35 50 0.35 (3) 200 50 0.35 50 0.35 (3) 250 50 0.35 AT28C256 2-228 Ordering Code Package 5962-88525 16 UX 28U 5962-88525 16 XX 28D6 ...
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... The following table lists standard Atmel products that can be ordered. Device Numbers Speed AT28C256 15 AT28C256E 15 AT28C256F 15 AT28C256 20 AT28C256E 20 AT28C256F 20 AT28C256 25 AT28C256E 25 AT28C256F 25 AT28C256 - Ordering Code 5962-88525 05 UX 5962-88525 05 XX 5962-88525 05 YX 5962-88525 05 ZX 5962-88525 03 UX 5962-88525 03 XX 5962-88525 03 YX 5962-88525 03 ZX 5962-88525 10 UX 5962-88525 10 XX ...
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Lead, 0.600" Wide, Non-Windowed, Ceramic Dual Inline Package (Cerdip) 28F 28 Lead, Non-Windowed, Ceramic Bottom-Brazed Flat Package (Flatpack) 32J 32 Lead, Plastic J-Leaded Chip Carrier (PLCC) 32L 32 Pad, Non-Windowed, Ceramic Leadless Chip Carrier (LCC) 28P6 28 Lead, ...