Not recommended for new designs –
Please use 93LC46C, 93LC56C or 93LC66C.
93LC46/56/66
1K/2K/4K 2.5V Microwire Serial EEPROM
Features:
Package Types
CS
CLK
1
2
DI
DO
3
8
7
VCC
NU
6
4
5
ORG
VSS
NU
VCC
1
2
8
7
ORG
VSS
CS
CLK
3
6
DO
DI
ROTATED SOIC
93LC46X
93LC56X
93LC66X
- Industrial (I):
PDIP/SOIC
93LC46
93LC56
93LC66
• Single supply with programming operation down
to 2.5V
• Low-power CMOS technology
• 100 A typical active read current at 2.5V
• 3 A typical standby current at 2.5V
• ORG pin selectable memory configuration
• 128 x 8- or 64 x 16-bit organization (93LC46)
• 256 x 8- or 128 x 16-bit organization (93LC56)
• 512 x 8 or 256 x 16 bit organization (93LC66)
• Self-timed erase and 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 during erase/write cycles
• Sequential read function
• 1,000,000 E/W cycles ensured
• Data retention > 200 years
• 8-pin PDIP/SOIC
(SOIC in JEDEC standards)
• Temperature ranges supported:
4
5
Block Diagram
VCC
VSS
Memory
Array
-40°C to +85°C
Address
Decoder
Address
Counter
Description:
The Microchip Technology Inc. 93LC46/56/66 are 1K,
2K and 4K low voltage serial Electrically Erasable
PROMs (EEPROM). The device memory is configured
as x8 or x16 bits depending on the external logic of
levels of the ORG pin. Advanced CMOS technology
makes these devices ideal for low power nonvolatile
memory applications. The 93LC Series is available in
standard 8-pin PDIP and surface mount SOIC
packages. The rotated pin-out 93LC46X/56X/66X are
offered in the “SN” package only.
2002-2012 Microchip Technology Inc.
Data Register
Output
Buffer
DO
DI
ORG
CS
Mode
Decode
Logic
CLK
Clock
Register
DS21712C-page 1
