Manual

HT93LC66
CMOS 4K 3-Wire Serial EEPROM
Block Diagram
Pin Assignment
Rev. 1.20 1 October 29, 2001
Features
·
Operating voltage V
CC
-
Read: 2.0V~5.5V
-
Write: 2.4V~5.5V
·
Low power consumption
-
Operating: 5mA max.
-
Standby: 10mA max.
·
User selectable internal organization
-
4K(HT93LC66): 512´8or256´16
·
3-wire Serial Interface
·
Write cycle time: 5ms max.
·
Automatic erase-before-write operation
·
Word/chip erase and write operation
·
Write operation with built-in timer
·
Software controlled write protection
·
10-year data retention after 100K rewrite cycles
·
10
6
rewrite cycles per word
·
Commercial temperature range (0°Cto+70°C)
·
8-pin DIP/SOP package
General Description
The HT93LC66 is a 4K-bit low voltage nonvolatile, serial
electrically erasable programmable read only memory de
-
vice using the CMOS floating gate process. Its 4096 bits of
memory are organized into 256 words of 16 bits each
when the ORG pin is connected to VCC or organized into
512 words of 8 bits each when it is tied to VSS. The device
is optimized for use in many industrial and commercial ap
-
plications where low power and low voltage operation are
essential. By popular microcontroller, the versatile serial
interface including chip select (CS), serial clock (SK), data
input (DI) and data output (DO) can be easily controlled.
M e m o ry C e ll
Array
4K: (512
´
8 or 256
´
16)
C ontrol
Logic
and
Clock
G enerator
Data
R egister
Address
R egister
CS
SK
DI
VCC
VSS
DO
Address
D ecoder
O utput
B u ffe r
ORG
1
2
3
4
8
7
6
5
VCC
NC
ORG
VSS
CS
SK DI
DO
VCC
NC
ORG
VSS
CS
SK
DI
DO
1
2
3
4
8
7
6
5
HT93LC66
8 D IP -A /S O P -A
HT93LC66
8 S O P -B