25AA256-I/SM datasheet, PDF - EEWORLD Datasheet

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25AA256-I/SM: DescriptionElectrically erasable programmable read-only memory 256k 32KX8 1.8V SER EE IND; Categorystorage storage; File Size329KB，27 Pages; ManufacturerMicrochip; Websitehttps://www.microchip.com; Environmental Compliance

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25AA256-I/SM Overview

Electrically erasable programmable read-only memory 256k 32KX8 1.8V SER EE IND

25AA256-I/SM Parametric

Parameter Name	Attribute value
Is it lead-free?	Lead free
Is it Rohs certified?	conform to
Parts packaging code	SOIC
package instruction	5.28 MM, ROHS COMPLIANT, PLASTIC, SOIC-8
Contacts	8
Reach Compliance Code	compliant
ECCN code	EAR99
Factory Lead Time	19 weeks
Maximum clock frequency (fCLK)	10 MHz
Data retention time - minimum	200
Durability	1000000 Write/Erase Cycles
JESD-30 code	R-PDSO-G8
JESD-609 code	e3
length	5.245 mm
memory density	262144 bit
Memory IC Type	EEPROM
memory width	8
Humidity sensitivity level	3
Number of functions	1
Number of terminals	8
word count	32768 words
character code	32000
Operating mode	SYNCHRONOUS
Maximum operating temperature	85 °C
Minimum operating temperature	-40 °C
organize	32KX8
Package body material	PLASTIC/EPOXY
encapsulated code	SOP
Encapsulate equivalent code	SOP8,.3
Package shape	RECTANGULAR
Package form	SMALL OUTLINE
Parallel/Serial	SERIAL
Peak Reflow Temperature (Celsius)	260
power supply	2/5 V
Certification status	Not Qualified
Maximum seat height	2.03 mm
Serial bus type	SPI
Maximum standby current	0.000001 A
Maximum slew rate	0.006 mA
Maximum supply voltage (Vsup)	5.5 V
Minimum supply voltage (Vsup)	1.8 V
Nominal supply voltage (Vsup)	2.5 V
surface mount	YES
technology	CMOS
Temperature level	INDUSTRIAL
Terminal surface	Matte Tin (Sn)
Terminal form	GULL WING
Terminal pitch	1.27 mm
Terminal location	DUAL
Maximum time at peak reflow temperature	40
width	5.23 mm
Maximum write cycle time (tWC)	5 ms
write protect	HARDWARE/SOFTWARE
Base Number Matches	1

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25AA256/25LC256

256K SPI

™

Bus Serial EEPROM

Device Selection Table

Part Number

25LC256

25AA256

Range

2.5-5.5V

1.8-5.5V

Page Size

64 Byte

Temp. Ranges

I, E

Packages

P, SN, SM, ST, MF

Features:

• Max. clock 10 MHz

• Low-power CMOS technology:

- Max. Write Current: 5 mA at 5.5V, 10 MHz

- Read Current: 6 mA at 5.5V, 10 MHz

- Standby Current: 1

μA

at 5.5V

• 32,768 x 8-bit organization

• 64 byte page

• Self-timed erase and write cycles (5 ms max.)

• 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

• Temperature ranges supported:

- Industrial (I):

-40°C to +85°C

- Automotive (E):

-40°C to +125°C

• Pb-free packages available

Description:

The Microchip Technology Inc. 25AA256/25LC256

(25XX256

) are 256 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,

transitions on its inputs will be ignored, with the

exception of Chip Select, allowing the host to service

higher priority interrupts.

The 25XX256 is available in standard packages

including 8-lead PDIP and SOIC, and advanced

packaging including 8-lead DFN and 8-lead TSSOP.

Pb-free (Pure Sn) finish is available.

Package Types (not to scale)

DFN

(MF)

CS 1

SO 2

WP 3

HOLD

SCK

PDIP/SOIC

(P, SN, SM)

HOLD

SCK

Pin Function Table

Name

SCK

HOLD

Function

Chip Select Input

Serial Data Output

Write-Protect

Ground

Serial Data Input

Serial Clock Input

Hold Input

Supply Voltage

Rotated TSSOP

(ST)

HOLD

SCK

TSSOP

(ST)

HOLD

SCK

SPI is a registered trademark of Motorola Corporation.

* 25XX256 is used in this document as a generic part number for the 25AA256, 25LC256 devices.

2005 Microchip Technology Inc.

DS21822E-page 1

25AA256-I/SM Related Products

	25AA256-I/SM	25LC256T-E-SM	25LC256X-E-ST	25LC256X-I-ST	25AA256/W16K	25AA256T-I/SM
Description	Electrically erasable programmable read-only memory 256k 32KX8 1.8V SER EE IND	EEPROM 256k 32KX8 2.5V SER EE EXT	EEPROM 256k 32KX8 2.5V SER EE EXT	EEPROM 256k 32KX8 2.5V SER EE IND	Electrically erasable programmable read-only memory 256k, 32K X 8, 1.8V SER EE, WAFER	Electrically erasable programmable read-only memory 256k 32KX8 1.8V SER EE IND

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Shortcut: 00 01 02 03 04 05 06 07 08 09 0A 0C 0F 0J 0L 0M 0R 0S 0T 0Z 10 11 12 13 14 15 16 17 18 19 1A 1B 1C 1D 1E 1F 1H 1K 1M 1N 1P 1S 1T 1V 1X 1Z 20 21 22 23 24 25 26 27 28 29 2A 2B 2C 2D 2E 2F 2G 2K 2M 2N 2P 2Q 2R 2S 2T 2W 2Z 30 31 32 33 34 35 36 37 38 39 3A 3B 3C 3D 3E 3F 3G 3H 3J 3K 3L 3M 3N 3P 3R 3S 3T 3V 40 41 42 43 44 45 46 47 48 49 4A 4B 4C 4D 4M 4N 4P 4S 4T 50 51 52 53 54 55 56 57 58 59 5A 5B 5C 5E 5G 5H 5K 5M 5N 5P 5S 5T 5V 60 61 62 63 64 65 66 67 68 69 6A 6C 6E 6F 6M 6N 6P 6R 6S 6T 70 71 72 73 74 75 76 77 78 79 7A 7B 7C 7M 7N 7P 7Q 7V 7W 7X 80 81 82 83 84 85 86 87 88 89 8A 8D 8E 8L 8N 8P 8S 8T 8W 8Y 8Z 90 91 92 93 94 95 96 97 98 99 9A 9B 9C 9D 9F 9G 9H 9L 9S 9T 9W

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