© Semiconductor Components Industries, LLC, 2015
August, 2015 − Rev. 13
1 Publication Order Number:
CAT93C66/D
CAT93C66, CAT93W66
4 kb Microwire Serial CMOS
EEPROM
Description
The CAT93C66 is a 4 kb CMOS Serial EEPROM device which is
organized as either 256 registers of 16 bits (ORG pin at V
CC
) or 512
registers of 8 bits (ORG pin at GND). The CAT93W66 features x16
memory organization only. Each register can be written (or read)
serially by using the DI (or DO) pin. The device features sequential
read and self−timed internal write with auto−clear. On−chip
Power−On Reset circuitry protects the internal logic against powering
up in the wrong state.
Features
• High Speed Operation: 2 MHz
• 1.8 V to 5.5 V Supply Voltage Range
• Selectable x8 or x16 Memory Organization: CAT93C66
• Sequential Read
• Software Write Protection
• Power−up Inadvertent Write Protection
• Low Power CMOS Technology
• 1,000,000 Program/Erase Cycles
• 100 Year Data Retention
• Industrial and Extended Temperature Ranges
• 8−lead PDIP, SOIC, TSSOP and 8−pad TDFN Packages
• These Devices are Pb−Free, Halogen Free/BFR Free, and RoHS
Compliant
ORG
DO
CAT93C66
SK
GND
V
CC
Figure 1. Functional Symbols
DI
CS
DO
CAT93W66
SK
GND
V
CC
DI
CS
CAT93C66 Selectable Organization:
When the ORG pin is connected to V
CC
, the x16 organization is
selected. When it is connected to ground, the x8 organization is
selected. If the ORG pin is left unconnected, then an internal pull−up
device will select the x16 organization.
CAT93W66*:
The device works in x16 mode only.
*Not recommended for new designs
www.onsemi.com
PIN CONFIGURATION
(Top View)
DO
DI
SK
CS
See detailed ordering and shipping information in the package
dimensions section on page 13 of this data sheet.
ORDERING INFORMATION
SOIC−8
V SUFFIX
CASE 751BD
TDFN−8
VP2 SUFFIX
CASE 511AK
PDIP (L), SOIC (V, X),
TSSOP (Y),
TDFN (VP2)
PDIP−8
L SUFFIX
CASE 646AA
TSSOP−8
Y SUFFIX
CASE 948AL
SOIC−8
X SUFFIX
CASE 751BE
GND
ORG
NC
V
CC
1
2
3
4
8
7
6
5
TDFN (VP2)
CAT93W66*
DO
DI
SK
CS
GND
NC
NC
V
CC
1
2
3
4
8
7
6
5