93AA66A/B/C, 93LC66A/B/C,
93C66A/B/C
4K Microwire Compatible Serial EEPROM
Device Selection Table
Part Number
VCC Range
ORG Pin
Word Size
Temp Ranges
Packages
93AA66A
93AA66B
93LC66A
93LC66B
93C66A
1.8-5.5
1.8-5-5
2.5-5.5
2.5-5.5
4.5-5.5
4.5-5.5
1.8-5.5
2.5-5.5
4.5-5.5
No
No
8-bit
16-bit
I
P, SN, ST, MS, OT, MC, MN
P, SN, ST, MS, OT, MC, MN
P, SN, ST, MS, OT, MC, MN
P, SN, ST, MS, OT, MC, MN
P, SN, ST, MS, OT, MC, MN
P, SN, ST, MS, OT, MC, MN
P, SN, ST, MS, MC, MN
I
No
8-bit
I, E
I, E
I, E
I, E
I
No
16-bit
No
8-bit
93C66B
No
16-bit
93AA66C
93LC66C
93C66C
Yes
Yes
Yes
8- or 16-bit
8- or 16-bit
8- or 16-bit
I, E
I, E
P, SN, ST, MS, MC, MN
P, SN, ST, MS, MC, MN
Features:
Pin Function Table
Name
Function
• Low-Power CMOS Technology
• ORG Pin to Select Word Size for ‘66C’ Version
• 512 x 8-bit Organization ‘A’ Devices (no ORG)
• 256 x 16-bit organization ‘B’ Devices (no ORG)
CS
Chip Select
CLK
DI
Serial Data Clock
Serial Data Input
Serial Data Output
Ground
• Self-tImed Erase/Write Cycles (including
Auto-Erase)
DO
VSS
NC
• Automatic Erase All (ERAL) Before Write All
(WRAL)
No internal connection
Memory Configuration
Power Supply
ORG
VCC
• Power-On/Off Data Protection Circuitry
• Industry Standard 3-Wire Serial I/O
• Device Status Signal (Ready/Busy)
• Sequential Read Function
Description:
• 1,000,000 Erase/Write Cycles
• Data Retention > 200 Years
The Microchip Technology Inc. 93XX66A/B/C devices
are 4Kbit low-voltage serial Electrically Erasable
PROMs (EEPROM). Word-selectable devices such as
the 93AA66C, 93LC66C or 93C66C are dependent
upon external logic levels driving the ORG pin to set
word size. For dedicated 8-bit communication, the
93XX66A devices are available, while the 93XX66B
devices provide dedicated 16-bit communication.
Advanced CMOS technology makes these devices
ideal for low-power, nonvolatile memory applications.
The entire 93XX Series is available in standard
packages including 8-lead PDIP and SOIC, and
advanced packaging including 8-lead MSOP, 6-lead
SOT-23, 8-lead 2x3 DFN/TDFN and 8-lead TSSOP. All
packages are Pb-free (Matte Tin) finish.
• Pb-free and RoHS Compliant
• Temperature Ranges Supported:
- Industrial (I)
-40°C to +85°C
- Automotive (E) -40°C to +125°C
2003-2011 Microchip Technology Inc.
DS21795E-page 1