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CAT93C66
4-kb Microwire Serial CMOS EEPROM
CAT93C66, CA T93W66
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 VCC) 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 selfïtimed internal write with autoïclear. Onïchip
PowerïOn Reset circuitry protects the internal logic against powering
up in the wrong state.
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 Selfïtimed Write Cycle with Autoïclear Sequential Read Software Write Protection Powerïup Inadvertent Write Protection Low Power CMOS Technology 1,000,000 Program/Erase Cycles 100 Year Data Retention Industrial and Extended Temperature Ranges 8ïlead PDIP, SOIC, TSSOP, 6ïlead SOTï23, 8ïpad TDFN and
UDFN Packages These Devices are PbïFree, Halogen Free/BFR Free, and RoHS
Compliant
ORGCAT93C66
GND
VCC
Figure 1. Functional Symbols DOCAT93W66SK
GND
VCC
CAT93C66 Selectable Organization:
When the ORG pin is connected to VCC, 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 pullïup
device will select the x16 organization.
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PIN CONFIGURATION
See detailed ordering and shipping information in the package
ORDERING INFORMATION
SOICï8
V, W* SUFFIX
CASE 751BD
PDIP (L), SOIC (V, X),
TSSOP (Y), TDFN (VP2)*,
UDFN (HU4)
PDIPï8
L SUFFIX
CASE 646AA
TSSOPï8
Y SUFFIX
CASE 948AL
SOICï8
X SUFFIX
CASE 751BE
* Not recommended for new designs
** CAT93C66 available in SOTï23 6ïpin for x8
Organization. Contact factory for availability.
GND
ORG
VCC
VCC1
GND
ORG
SOIC (W)*
SOT23ï6
TB SUFFIX
CASE 527AJ
GND1
VCC
SOTï23 (TB)**
TDFN (VP2)
CAT93W66
GND
VCC1
UDFNï8
HU4 SUFFIX
CASE 517AZ
TDFNï8*
VP2 SUFFIX
CASE 511AK
