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
P, SN, ST, MS, OT, MC
P, SN, ST, MS, OT, MC
P, SN, ST, MS, OT, MC
P, SN, ST, MS, OT, MC
P, SN, ST, MS, OT, MC
P, SN, ST, MS, MC
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
P, SN, ST, MS, MC
Features:
Description:
• Low-power CMOS technology
The Microchip Technology Inc. 93XX66A/B/C devices
are 4K bit 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 and 8-lead TSSOP. Pb-free
(Pure Matte Sn) finish is available.
• ORG pin to select word size for ‘66C’ version
• 512 x 8-bit organization ‘A’ ver. devices (no ORG)
• 256 x 16-bit organization ‘B’ ver. devices (no
ORG)
• Self-timed erase/write cycles (including
auto-erase)
• Automatic ERAL before WRAL
• Power-on/off data protection circuitry
• Industry standard 3-wire serial I/O
• Device Status signal (Ready/Busy)
• Sequential read function
• 1,000,000 E/W cycles
• Data retention > 200 years
• Temperature ranges supported:
- Industrial (I)
-40°C to +85°C
-40°C to +125°C
- Automotive (E)
Pin Function Table
Name
Function
CS
Chip Select
CLK
DI
Serial Data Clock
Serial Data Input
Serial Data Output
Ground
DO
VSS
NC
No internal connection
Memory Configuration
Power Supply
ORG
VCC
© 2005 Microchip Technology Inc.
DS21795C-page 1