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 ) or 512
CC
http://onsemi.com
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.
SOIC−8
V, W* SUFFIX
CASE 751BD
UDFN−8
HU4 SUFFIX
CASE 517AZ
TDFN−8*
VP2 SUFFIX
CASE 511AK
Features
• High Speed Operation: 4 MHz (5 V), 2 MHz (1.8 V)
• 1.8 V to 5.5 V Supply Voltage Range
• Selectable x8 or x16 Memory Organization: CAT93C66
• Self−timed Write Cycle with Auto−clear
• Sequential Read
PDIP−8
L SUFFIX
CASE 646AA
TSSOP−8
Y SUFFIX
CASE 948AL
• Software Write Protection
• Power−up Inadvertent Write Protection
• Low Power CMOS Technology
• 1,000,000 Program/Erase Cycles
SOIC−8
X SUFFIX
CASE 751BE
SOT23−6
TB SUFFIX
CASE 527AJ
• 100 Year Data Retention
• Industrial and Extended Temperature Ranges
• 8−lead PDIP, SOIC, TSSOP, 6−lead SOT−23, 8−pad TDFN and
UDFN Packages
PIN CONFIGURATION
• These Devices are Pb−Free, Halogen Free/BFR Free, and RoHS
Compliant
1
2
3
4
8
7
6
5
1
8
CS
SK
DI
V
NC
ORG
GND
DO
CC
V
CC
V
CC
NC
V
2
3
4
7
6
5
CC
CS
SK
ORG
GND
DO
DI
ORG
CS
SK
CS
SK
DI
PDIP (L), SOIC (V, X),
TSSOP (Y), TDFN (VP2)*,
UDFN (HU4)
SOIC (W)*
CAT93C66
CAT93W66
DO
DO
1
2
3
6
5
4
DO
GND
DI
V
CC
DI
1
2
3
4
8
7
6
5
CS
SK
DI
V
CC
CS
SK
NC
NC
GND
GND
SOT−23 (TB)**
DO
GND
Figure 1. Functional Symbols
TDFN (VP2)
CAT93W66
CAT93C66 Selectable Organization:
* Not recommended for new designs
** CAT93C66 available in SOT−23 6−pin for x8
Organization. Contact factory for availability.
When the ORG pin is connected to V , the x16 organization is
CC
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.
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 16 of this data sheet.
CAT93W66:
The device works in x16 mode only.
© Semiconductor Components Industries, LLC, 2012
1
Publication Order Number:
April, 2012 − Rev. 11
CAT93C66/D