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CAT28C16ALA-20T Datasheet(PDF) 6 Page - ON Semiconductor |
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CAT28C16ALA-20T Datasheet(HTML) 6 Page - ON Semiconductor |
6 / 10 page CAT28C16A http://onsemi.com 6 DATA Polling DATA polling is provided to indicate the completion of a byte write cycle. Once a byte write cycle is initiated, attempting to read the last byte written will output the complement of that data on I/O7 (I/O0–I/O6 are indeterminate) until the programming cycle is complete. Upon completion of the self−timed byte write cycle, all I/O’s will output true data during a read cycle. Figure 6. Byte Write Cycle [CE Controlled] ADDRESS DATA OUT DATA IN DATA VALID HIGH−Z WE OE CE tAS tAH tCS tOES tCW tOEH tCH tDL tDS tDH tWC Figure 7. DATA Polling ADDRESS I/O7 WE OE CE DIN = X DOUT = X DOUT = X tOEH tOE tWC tOES Hardware Data Protection The following is a list of hardware data protection features that are incorporated into the CAT28C16A. 1. VCC sense provides for write protection when VCC falls below 3.0 V min. 2. A power on delay mechanism, tINIT (see AC characteristics), provides a 5 to 20 ms delay before a write sequence, after VCC has reached 3.0 V min. 3. Write inhibit is activated by holding any one of OE low, CE high or WE high. 4. Noise pulses of less than 20 ns on the WE or CE inputs will not result in a write cycle. |
Similar Part No. - CAT28C16ALA-20T |
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Similar Description - CAT28C16ALA-20T |
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