2003 Microchip Technology Inc. DS21795B-page 1
93AA66A/B/C, 93LC66A/B/C,
93C66A/B/C
Device Selection Table
Features
• Low-power CMOS technology
• 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 (READ Y/BUSY)
• Seque nti al REA D functi on
• 1,000,000 E/W cycles
• Data retention > 200 y ears
• Temperature ranges supported:
Pin Function Table
Description
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
93AA66A, 93LC66A or 93C66A devices are available,
while the 93AA66B, 93LC66B and 93C66B devices
provide dedicated 16-bit communication. Advanced
CMOS technology makes these devices ideal for low
power, non-volatile memory applications. The entire
93XX Series is available in standard packages includ-
ing 8-lead PDIP and SOIC, and advanced packaging
including 8-lead MSOP, 6-lead SOT-23, and 8-lead
TSSOP. Pb-free (Pure Matte Sn) finish is also
available.
Package Types (not to scale)
Part Number VCC Range ORG Pin Word Size Temp Ranges Packages
93AA66A 1.8-5.5 No 8-bit I P, SN, ST, MS, OT
93AA66B 1.8-5-5 No 16-bit I P, SN, ST, MS, OT
93LC66A 2.5-5.5 No 8-bit I, E P, SN, ST, MS, OT
93LC66B 2.5-5.5 No 16-bit I, E P, SN, ST, MS, OT
93C66A 4.5-5.5 No 8-bit I, E P, SN, ST, MS, OT
93C66B 4.5-5.5 No 16-bit I, E P, SN, ST, MS, OT
93AA66C 1.8-5.5 Yes 8 or 16-bit I P, SN, ST, MS
93LC66C 2.5-5.5 Yes 8 or 16-bit I, E P, SN, ST, MS
93C66C 4.5-5.5 Yes 8 or 16-bit I, E P, SN, ST, MS
- Industrial (I) -40°C to +85°C
- Automotive (E) -40°C to +125°C
Name Function
CS Chip Select
CLK Serial Data Clock
DI Serial Data Input
DO Serial Data Output
VSS Ground
NC No internal connec tio n
ORG Memory Configuration
V
CC Power Supply
CS
CLK
DI
DO
1
2
3
4
8
7
6
5
V
CC
NC
ORG*
V
SS
PDIP/SOIC
(P, SN)
CS
CLK
DI
DO
1
2
3
4
8
7
6
5
V
CC
NC
ORG*
V
SS
ROTATED SOIC
(ex: 93LC66BX)
TSSOP/MSOP
CS
CLK
DI
DO
1
2
3
4
8
7
6
5
V
CC
NC
ORG*
V
SS
(S T, MS )
SOT-23
DO
V
SS
DI
1
2
3
6
5
4
V
CC
CS
CLK
(OT)
* ORG pin is NC on A/B devices
4K Micr owire Compatible Serial EEPROM
