CAT28C256H13I-15 CATALYST SEMICONDUCTOR, CAT28C256H13I-15 Datasheet - Page 9

• Manufacturer Part Number: CAT28C256H13I-15
• Description: IC, EEPROM, 256KBIT, PARALLEL, TSOP-28
• Manufacturer: CATALYST SEMICONDUCTOR

Specifications of CAT28C256H13I-15

• Memory Size: 256Kbit
• Memory Configuration: 32K X 8
• Ic Interface Type: Parallel
• Access Time: 150ns
• Supply Voltage Range: 4.5V To 5.5V
• Memory Case Style: TSOP
• No. Of Pins: 28
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Hardware Data Protection
that are incorporated into the CAT28C256.
15. Write protection is activated at this point whether or not any more writes are completed. Writing to addresses must occur within t
The following is a list of hardware data protection features
after SDP activation.
1. V
2. A power on delay mechanism, t
3. Write inhibit is activated by holding any one of
Figure 10. Write Sequence for Activating
falls below 3.5 V min.
characteristics), provides a 5 to 10 ms delay before
a write sequence, after V
min.
OE low, CE high or WE high.
CC
PROTECTION ACTIVATED (Note 15)
sense provides for write protection when V
Software Data Protection
WRITE DATA:
WRITE DATA:
WRITE DATA:
WRITE DATA:
ADDRESS:
ADDRESS:
ADDRESS:
WRITE LAST BYTE
TO ANY ADDRESS
SOFTWARE DATA
LAST ADDRESS
TO
CC
AA
5555
55
2AAA
A0
5555
XX
has reached 3.5 V
INIT
(see AC
http://onsemi.com
CC
9
Software Data Protection
protection scheme which, once enabled, requires a data
algorithm to be issued to the device before a write can be
performed. The device is shipped from ON Semiconductor
with the software protection NOT ENABLED (the
CAT28C256 is in the standard operating mode).
The CAT28C256 features a software controlled data
4. Noise pulses of less than 20 ns on the WE or CE
Figure 11. Write Sequence for Deactivating
inputs will not result in a write cycle.
Software Data Protection
WRITE DATA:
WRITE DATA:
WRITE DATA:
WRITE DATA:
WRITE DATA:
WRITE DATA:
ADDRESS:
ADDRESS:
ADDRESS:
ADDRESS:
ADDRESS:
ADDRESS:
AA
5555
55
2AAA
80
5555
AA
5555
55
2AAA
20
5555
BLC
Max.,