25AA512T-I/MF【PDF 1/36 页】IC EEPROM 512KBIT 20MHZ 8DFN

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25AA512

512 Kbit SPI Bus Serial EEPROM

Device Selection Table

Part Number

25AA512

V CC Range

1.8-5.5V

Page Size

128 Byte

Temp. Ranges

Packages

P, SN, SM, MF

Features:

? 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

Description:

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.

Package Types (not to scale)

- Data Retention: >200 years

- ESD Protection: 4000V

? Temperature Ranges Supported:

- Industrial (I): -40°C to +85°C

? Pb-free and RoHS Compliant

Pin Function Table

Name Function

CS 1

SO 2

WP 3

V SS 4

DFN

(MF)

V CC

HOLD

SCK

PDIP/SOIC/SOIJ

(P, SN, SM)

CS 1 8 V CC

SO 2 7 HOLD

WP 3 6 SCK

V SS 4 5 SI

V SS

SCK

HOLD

V CC

Chip Select Input

Serial Data Output

Write-Protect

Ground

Serial Data Input

Serial Clock Input

Hold Input

Supply Voltage

? 2010 Microchip Technology Inc.

DS22021F-page 1

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