AT29C256-15 ATMEL [ATMEL Corporation], AT29C256-15 Datasheet
AT29C256-15
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AT29C256-15 Summary of contents
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... Commercial and Industrial Temperature Ranges Description The AT29C256 is a five-volt-only in-system Flash programmable and erasable read only memory (PEROM). Its 256K of memory is organized as 32,768 words by 8 bits. Manufactured with Atmel’s advanced nonvolatile CMOS technology, the device offers access times with power dissipation of just 275 mW. When the device is deselected, the CMOS standby current is less than 300 µ ...
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... DATA polling of I/O7. Once the end of a program cycle has been detected a new access for a read, program or chip erase can begin. READ: The AT29C256 is accessed like a static RAM. When CE and OE are low and WE is high, the data stored at the memory location determined by the address pins is asserted on the outputs ...
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... WC SOFTWARE DATA PROTECTION: A software controlled data protection feature is available on the AT29C256. Once the software protection is enabled a software algo- rithm must be issued to the device before a program may be performed. The software protection feature may be enabled or disabled by the user; when shipped from Atmel, the software data protection feature is disabled ...
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... For details, see Operating Modes or Product Identification. DATA POLLING: The AT29C256 features DATA polling to indicate the end of a pro- gram cycle. During a program cycle an attempted read of the last byte loaded will result in the complement of the loaded data on I/O7. Once the program cycle has been com- pleted, true data is valid on all outputs and the next cycle may begin ...
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... High Z X High Z A1-A14 = Manufacturer Code A1-A14 = Device Code Manufacturer Code Device Code IH Min Max 10 10 300 3 50 0.8 2.0 0.45 2.4 4.2 AT29C256-15 0°C - 70°C -40°C - 85°C 5V± 10% (4) (4) (4) (4) Units µA µA µ ...
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... Max Min after the address transition without impact on t ACC after the falling edge of CE without impact AT29C256-12 AT29C256-15 Max Min Max Min Max 90 120 150 90 120 150 ...
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... Input Test Waveforms and Measurement Level t R Output Test Load Pin Capacitance ( MHz 25°C Symbol Typ OUT Note: 1. This parameter is characterized and is not 100% tested. 0046P–FLASH–10/ < Max 6 12 AT29C256 Units Conditions OUT 7 ...
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... CS t Chip Select Hold Time CH t Write Pulse Width ( Data Set-up Time Data, OE Hold Time DH OEH t Write Pulse Width High WPH AC Byte Load Waveforms WE Controlled CE Controlled AT29C256 8 Min Max Units 100 ns ...
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... A6 through A14 must specify the page address during each high-to-low transition of WE (or CE must be high when WE and CE are both low. 3. All bytes that are not loaded within the page being programmed will be indeterminate. 0046P–FLASH–10/04 (1)(2)(3) AT29C256 Min Max Units 10 ...
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... A6 through A14 must specify the page address during each high-to-low transition of WE (or CE) after the software code has been entered must be high when WE and CE are both low. 3. All bytes that are not loaded within the page being programmed will be indeterminate. AT29C256 10 Software Data Protection Disable Algorithm ...
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... Toggle Bit Waveforms Notes: 1. Toggling either both OE and CE will operate toggle bit. 2. Beginning and ending state of I/O6 will vary. 3. Any address location may be used but the address should not vary. 0046P–FLASH–10/04 (1) (1) AT29C256 Min Typ Max Min ...
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... A1 - A14 = Manufacturer Code is read for Device Code is read for The device does not remain in identification mode if powered down. 4. The device returns to standard operation mode. 5. Manufacturer Code is 1F. The Device Code is DC. AT29C256 12 (1) Software Product Identification Exit (2)(3)( ...
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... 0.8 -55 - TEMPERATURE (C) NORMALIZED SUPPLY CURRENT vs. ADDRESS FREQUENCY 25C FREQUENCY (MHz) NORMALIZED SUPPLY CURRENT vs. SUPPLY VOLTAGE 0.6 4.50 4.75 5.00 SUPPLY VOLTAGE (V) AT29C256 65 95 125 5.25 5.50 13 ...
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... AT29C256-12JC 32J AT29C256-12TC 28T AT29C256-12JI 32J AT29C256-12TI 28T AT29C256-15JC 32J AT29C256-15TC 28T AT29C256-15JI 32J AT29C256-15TI 28T Package Type Operation Range Commercial (0° to 70°C) Industrial (-40° to 85°C) Commercial (0° to 70°C) Industrial (-40° to 85°C) Commercial (0° to 70°C) Industrial (-40° ...
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... Orchard Parkway San Jose, CA 95131 R 0046P–FLASH–10/04 1.14(0.045) X 45˚ PIN NO. 1 IDENTIFIER TITLE 32J, 32-lead, Plastic J-leaded Chip Carrier (PLCC) AT29C256 0.318(0.0125) 0.191(0.0075 COMMON DIMENSIONS (Unit of Measure = mm) SYMBOL MIN NOM MAX NOTE A 3 ...
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... This package conforms to JEDEC reference MO-183. 2. Dimensions D1 and E do not include mold protrusion. Allowable protrusion 0.15 mm per side and 0.25 mm per side. 3. Lead coplanarity is 0.10 mm maximum. 2325 Orchard Parkway San Jose, CA 95131 R AT29C256 16 PIN SEATING PLANE ...
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... Atmel Corporation 2004. All rights reserved. Atmel are the trademarks of Atmel Corporation or its subsidiaries. Other terms and product names may be trademarks of others. Atmel Operations Memory 2325 Orchard Parkway San Jose, CA 95131, USA Tel: 1(408) 441-0311 ...