© 2007 Microchip Technology Inc. DS21808D-page 1
25AA080A/B, 25LC080A/B
Device Selection Table
Features
• Max. clock 10 MHz
• Low-power CMOS technology
• 1024 x 8-bit organization
• 16 byte page (‘A’ version devices)
• 32 byte page (‘B’ version devices)
• Write cycle time: 5 ms max.
• 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
- Write enable latch
- Write-protect pin
• Sequential read
• High reliability
- Endurance: 1,000,000 erase/write cycles
- Data retention: > 200 years
- ESD protection: > 4000V
• Pb-free and RoHS compliant
• Temperature ranges supported;
Pin Function Table
Description
The Microchip Technology Inc. 25AA080A/B,
25LC080A/B (25XX080A/B
*
) are 8 Kbit Serial
Electrically Erasable PROMs. The memory is accessed
via a simple Serial Peripheral Interface (SPI)
compatible 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 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.
The 25XX080A/B is available in standard packages
including 8-lead PDIP and SOIC, and advanced
packaging including 8-lead MSOP, and 8-lead TSSOP.
All packages are Pb-free and RoHS compliant.
Package Types (not to scale)
Part Number VCC Range Page Size Temp. Ranges Packages
25LC080A 2.5-5.5V 16 Byte I, E P, SN, ST, MS
25AA080A 1.8-5.5V 16 Byte I P, SN, ST, MS
25LC080B 2.5-5.5V 32 Byte I, E P, SN, ST, MS
25AA080B 1.8-5.5V 32 Byte I P, SN, ST, MS
- Industrial (I): -40°Cto +85°C
- Automotive (E): -40°C to +125°C
Name Function
CS
Chip Select Input
SO Serial Data Output
WP Write-Protect
VSS Ground
SI Serial Data Input
SCK Serial Clock Input
HOLD
Hold Input
VCC Supply Voltage
CS
SO
WP
V
SS
1
2
3
4
8
7
6
5
V
CC
HOLD
SCK
SI
PDIP/SOIC
(P, SN)
TSSOP/MSOP
CS
SO
WP
V
SS
1
2
3
4
8
7
6
5
V
CC
HOLD
SCK
SI
(ST, MS)
8K SPI Bus Serial EEPROM
*25XX080A/B is used in this document as a generic part
number for the 25AA080A/B, 25LC080A/B.
