WS57C45 STMicroelectronics, WS57C45 Datasheet
WS57C45
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WS57C45 Summary of contents
Page 1
... This feature can be used to force an initialize word or provide a preset or clear function. A further advantage of the WS57C45 over Bipolar PROM devices is the fact that it utilizes a proven EPROM technology. This enables the entire memory array to be tested for switching characteristics and functionality after assembly ...
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... PWI t 15 LZC t 15 HZC t 15 LZOE t 15 HZOE MIN MAX 0.4 2.4 Comm'l Industrial Military Comm'l Industrial Military –10 –10 MAX WS57C45-35 WS57C45-45 MIN MAX MIN MAX ...
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... SOE HOE SOE HOE HOE PWC PWC PWC PWC PWC HZC LZC 8-BIT O 4 EDGE- TRIGGERED O 3 REGISTER TEST 1.5 1.5 POINTS HZOE LZOE WS57C45 2-23 ...
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... WS57C45 NORMALIZED SUPPLY CURRENT vs. SUPPLY VOLTAGE 1.60 1.40 1.20 1.00 0.80 0.60 4.0 4.5 5.0 SUPPLY VOLTAGE ( V ) NORMALIZED T aa vs. AMBIENT TEMPERATURE 1.6 1.4 1.2 1.0 0.8 0.6 -55 -35 - AMBIENT TEMPERATURE ( °C ) 2-24 5.5 6 105 125 TYPICAL ACCESS TIME CHANGE vs. OUTPUT LOADING 40.0 35.0 30.0 25.0 20.0 15.0 10.0 5.0 0.0 0.0 200 400 600 CAPACITANCE ( pF ) NORMALIZED SUPPLY CURRENT vs. AMBIENT TEMPERATURE 1.2 1.1 1.0 0.9 0.8 -55 -35 - AMBIENT TEMPERATURE (°C) ...
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... Initialization Byte Programming The WS57C45 has a 2049th byte of data that can be used to initialize the value of the data register. This byte contains the value “0” when it is shipped from the factory. The user must program the 2049th byte with a value other than “ ...
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... Clocking CP/PGM once more from V impedance state. Blank Check Upon delivery from WaferScale Integration, Inc. or after each erasure (see Erasure section), the WS57C45 has all 2048 bytes in the ‘0’ state. “1’s” are loaded into the WS57C45 through the procedure of programming. MODE ...
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... PROGRAM DATA PROGRAM OTHER BYTES WS57C45 2-27 ...
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... WS57C45 PROGRAMMING INFORMATION DC CHARACTERISTICS SYMBOLS Input Leakage Current Supply Current During Programming Pulse I V Supply Current Input Low Voltage IL V Input High Voltage IH Output Low Voltage During Verify mA) OL Output High Voltage During Verify ...
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... WS57C45-45TMB 45 NOTE: The actual part marking will not include the initials "WS." * SMD product. See section 4 for DESC SMD numbers. PROGRAMMING/ALGORITHMS/ERASURE/PROGRAMMERS The WS57C45 is programmed using Algorithm A shown on page 5-3. Return to Main Menu PACKAGE PACKAGE TYPE DRAWING 24 Pin CERDIP, 0.3" Pin CERDIP, 0.3" ...