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Not recommended for new designs –
Please use 25AA080A/B or 25LC080A/B.
25AA080/25LC080/25C080
8K SPI ? Bus Serial EEPROM
Device Selection Table
Description:
Part
Number
25AA080
25LC080
25C080
V CC
Range
1.8-5.5V
2.5-5.5V
4.5-5.5V
Max. Clock
Frequency
1 MHz
2 MHz
3 MHz
Temp.
Ranges
I
I
I,E
The Microchip Technology Inc. 25AA080/25LC080/
25C080 (25XX080 * ) are 8 Kbit Serial Electrically
Erasable PROMs. The memory is accessed via a
simple Serial Peripheral Interface? (SPI?) compati-
ble serial bus. The bus signals required are a clock
input (SCK) plus separate data in (SI) and data out
(SO) lines. Access to the device is controlled through a
Features:
? Low-power CMOS technology:
- Write current: 3 mA maximum
- Read current: 500 μ A typical
- Standby current: 500 nA typical
? 1024 x 8-bit organization
? 16 byte page
? Write cycle time: 5 ms max.
Chip Select (CS) input.
Communication to the device can be paused via the
hold pin (HOLD). While the device is paused, transi-
tions on its inputs will be ignored, with the exception of
chip select, allowing the host to service higher priority
interrupts.
Package Types
PDIP/SOIC
? Self-timed erase and write cycles
? Block write protection:
- Protect none, 1/4, 1/2 or all of array
? Built-in write protection:
- Power-on/off data protection circuitry
CS
SO
WP
V SS
1
2
3
4
8
7
6
5
V CC
HOLD
SCK
SI
- Write enable latch
- Write-protect pin
? Sequential read
Block Diagram
? High reliability:
- Endurance: 1 M cycles
- Data retention: > 200 years
- ESD protection: > 4000V
? 8-pin PDIP and SOIC (150 mil)
Status
Register
HV Generator
? Temperature ranges supported:
- Industrial (I): -40 ° C to +85 ° C
- Automotive (E) (25C080): -40°C to +125°C
I/O Control
Logic
Memory
Control
Logic
X
Dec
EEPROM
Array
Page Latches
SI
*25XX080 is used in this document as a generic part number for the
25AA080/25LC080/25C080 devices.
SPI? is a trademark of Motorola Inc.
? 2004 Microchip Technology Inc.
SO
CS
SCK
HOLD
WP
V CC
V SS
Y Decoder
Sense Amp.
R/W Control
DS21230D-page 1
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