CAT28C17API-20T datasheet(8/12 Pages) ONSEMI

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CAT28C17API-20T Datasheet(PDF) 8 Page - ON Semiconductor

8 / 12 page

CAT28C17A

http://onsemi.com

Figure 7. DATA Polling

ADDRESS

I/O7

DIN = 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 CAT28C17A.

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.

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