CAT28C64B
64K-Bit CMOS PARALLEL EEPROM
FEATURES
I
Fast read access times:
H
GEN
FR
ALO
EE
LE
A
D
F
R
E
E
TM
I
Commercial, industrial and automotive
– 90/120/150ns
I
Low power CMOS dissipation:
temperature ranges
I
Automatic page write operation:
– Active: 25 mA max.
– Standby: 100
µ
A max.
I
Simple write operation:
– 1 to 32 bytes in 5ms
– Page load timer
I
End of write detection:
– On-chip address and data latches
– Self-timed write cycle with auto-clear
I
Fast write cycle time:
– Toggle bit
–
DATA
polling
I
100,000 program/erase cycles
I
100 year data retention
– 5ms max.
I
CMOS and TTL compatible I/O
I
Hardware and software write protection
DESCRIPTION
The CAT28C64B is a fast, low power, 5V-only CMOS
Parallel EEPROM organized as 8K x 8-bits. It requires a
simple interface for in-system programming. On-chip
address and data latches, self-timed write cycle with
auto-clear and V
CC
power up/down write protection
eliminate additional timing and protection hardware.
DATA
Polling and Toggle status bits signal the start and
end of the self-timed write cycle. Additionally, the
CAT28C64B features hardware and software write
protection.
The CAT28C64B is manufactured using Catalyst’s
advanced CMOS floating gate technology. It is designed
to endure 100,000 program/erase cycles and has a data
retention of 100 years. The device is available in JEDEC-
approved 28-pin DIP, TSOP, SOIC, or, 32-pin PLCC
package .
BLOCK DIAGRAM
A5–A12
ADDR. BUFFER
& LATCHES
INADVERTENT
WRITE
PROTECTION
ROW
DECODER
8,192 x 8
EEPROM
ARRAY
32 BYTE PAGE
REGISTER
VCC
HIGH VOLTAGE
GENERATOR
CE
OE
WE
CONTROL
LOGIC
I/O BUFFERS
TIMER
DATA POLLING
AND
TOGGLE BIT
COLUMN
DECODER
I/O0–I/O7
A0–A4
ADDR. BUFFER
& LATCHES
© 2005 by Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
1
Doc. No. 1011, Rev. F
CATALYST [ CATALYST SEMICONDUCTOR ]
