Microchip Technology 25AA512-I/SN Memory IC SOIC-8 25AA512-I/SN Data Sheet

 2010 Microchip Technology Inc.

DS22021F-page 1

• 20 MHz max. Clock Speed
• Byte and Page-level Write Operations:

- 128-byte page
- 5  ms  max.
- No page or sector erase required

• Low-Power CMOS Technology:

- Max. Write Current: 5 mA at 5.5V, 20 MHz
- Read Current: 10 mA at 5.5V, 20 MHz
- Standby Current: 1

A at 2.5V (Deep power-

down)

• Electronic Signature for Device ID
• Self-Timed Erase and Write cycles:

- Page Erase (5 ms, typical)
- Sector Erase (10 ms/sector, typical)
- Bulk Erase (10 ms, typical)

• Sector Write Protection (16K byte/sector):

- 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

• High Reliability:

- Endurance: 1 Million erase/write cycles
- Data Retention: >200 years
- ESD Protection: 4000V

• Temperature Ranges Supported:

- Industrial (I): -40°C to +85°C

• Pb-free and RoHS Compliant

The Microchip Technology Inc. 25AA512 is a 512 Kbit
serial EEPROM memory with byte-level and page-level
serial EEPROM functions. It also features Page, Sector
and Chip erase functions typically associated with
Flash-based products. These functions are not required
for byte or page write operations. 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 by 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 25AA512 is available in standard packages includ-
ing 8-lead PDIP, SOIC, and advanced 8-lead DFN
package. All packages are Pb-free and RoHS
compliant.

25AA512

1.8-5.5V

128 Byte

I

P, SN, SM, MF

CS

Chip Select Input

SO

Serial Data Output

WP

Write-Protect

V

SS

Ground

SI

Serial Data Input

SCK

Serial Clock Input

HOLD

Hold Input

V

CC

Supply Voltage

CS

SO

WP

V

SS

1
2
3
4

8
7
6
5

V

CC

HOLD
SCK
SI

CS

SO

WP

V

SS

HOLD

SCK

SI

5

6

7

8

4

3

2

1

V

CC