![](http://datasheet.mmic.net.cn/230000/93LC56B_datasheet_15572548/93LC56B_1.png)
2003 Microchip Technology Inc.
DS21794B-page 1
93AA56A/B/C, 93LC56A/B/C,
93C56A/B/C
Device Selection Table
Features
Low-power CMOS technology
ORG pin to select word size for ‘56C version
256 x 8-bit organization ‘A’ ver. devices (no ORG)
128 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)
- Automotive (E)
Pin Function Table
Description
The Microchip Technology Inc. 93XX56A/B/C devices
are 2K bit low voltage serial Electrically Erasable
PROMs (EEPROM). Word-selectable devices such as
the 93AA56C, 93LC56C or 93C56C are dependent
upon external logic levels driving the ORG pin to set
word size. For dedicated 8-bit communication, the
93AA56A, 93LC56A or 93C56A devices are available,
while the 93AA56B, 93LC56B and 93C56B 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 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
V
CC
Range
ORG Pin
Word Size
Temp Ranges
Packages
93AA56A
93AA56B
93LC56A
93LC56B
93C56A
93C56B
93AA56C
93LC56C
93C56C
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
No
No
No
No
Yes
Yes
Yes
8-bit
16-bit
8-bit
16-bit
8-bit
16-bit
8 or 16-bit
8 or 16-bit
8 or 16-bit
I
I
P, SN, ST, MS, OT
P, SN, ST, MS, OT
P, SN, ST, MS, OT
P, SN, ST, MS, OT
P, SN, ST, MS, OT
P, SN, ST, MS, OT
P, SN, ST, MS
P, SN, ST, MS
P, SN, ST, MS
I, E
I, E
I, E
I, E
I
I, E
I, E
-40°C to +85°C
-40°C to +125°C
Name
Function
CS
Chip Select
CLK
Serial Data Clock
DI
Serial Data Input
DO
Serial Data Output
V
SS
Ground
NC
No internal connection
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: 93LC56BX)
TSSOP/MSOP
(ST, MS)
CS
CLK
DI
DO
1
2
3
4
8
7
6
5
V
CC
NC
ORG*
V
SS
SOT-23
(OT)
DO
V
SS
DI
1
2
3
6
5
4
V
CC
CS
CLK
* ORG pin is NC on A/B devices
2K Microwire Compatible Serial EEPROM