CAT28C256H13I-15 CATALYST SEMICONDUCTOR, CAT28C256H13I-15 Datasheet - Page 8

• 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

DATA Polling
write cycle. Once a byte write or page write cycle is initiated,
attempting to read the last byte written will output the
complement of that data on I/O
indeterminate) until the programming cycle is complete.
Upon completion of the self−timed write cycle, all I/O’s will
output true data during a read cycle.
14. Beginning and ending state of I/O
ADDRESS
DATA polling is provided to indicate the completion of
I/O
WE
OE
CE
I/O 7
WE
OE
CE
6
D
t
6
OEH
IN
is indeterminate.
= X
7
(Note 14)
(I/O
0
t
OEH
–I/O
t
OE
Figure 8. DATA Polling
Figure 9. Toggle Bit
http://onsemi.com
6
are
D
OUT
8
t
OE
t
WC
Toggle Bit
CAT28C256, the device offers an additional method for
determining the completion of a write cycle. While a write
cycle is in progress, reading data from the device will result
in I/O
write is complete, I/O
read from the device.
= X
In addition to the DATA Polling feature of the
6
t
WC
toggling between one and zero. However, once the
6
stops toggling and valid data can be
(Note 14)
D
OUT
= X
t
OES
t
OES