الصفحة الرئيسية > الدوائر المتكاملة الدوائر المتكاملة > 25LC256T-I/SN

25LC256T-I/SN

256Kbit SPI EEPROM, 32Kx8, 10MHz, 2.5-5.5V, SOIC-8, >1M cycles, >200yr retention

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جزء الشركة المصنعة ： جزء الشركة المصنعة

25LC256T-I/SN

الحزمة ： الحزمة

SOIC-8 (4.90 x 3.91 x 1.58 mm, 200mil)

الوصف

نظرة عامة على المنتج

The 25LC256T-I/SN from Microchip Technology is a 256-Kbit SPI serial EEPROM organized as 32K x 8 bits, operating from 2.5V to 5.5V with clock rates up to 10 MHz. Available in an SOIC-8 package, it supports SPI modes 0 and 3, features block write protection, and delivers over 1 million erase/write cycles with greater than 200-year data retention, making it ideal for reliable nonvolatile storage in industrial and consumer applications.

المواصفات الرئيسية

الكثافة	256 Kbit (32K x 8)
الواجهة	SPI (Mode 0 and 3)
الحد الأقصى لتردد الساعة	10 MHz
جهد الإمداد	2.5 V to 5.5 V
Page Size	64 bytes
Write Cycle Time	5 ms (max)
Erase/Write Endurance	> 1,000,000 cycles
الاحتفاظ بالبيانات	> 200 years
درجة حرارة التشغيل	-40C to +85C

الميزات

SPI-compatible serial interface (modes 0 and 3) for simple microcontroller connection
Block write protection: 1/4, 1/2, or entire array
Self-timed erase and write cycle with 5 ms max write time
Over 1 million erase/write cycle endurance
Greater than 200-year data retention
Hardware write protect pin (WP)
Low power CMOS technology with 5 uA max standby current

التطبيقات

Industrial control parameter storage and calibration data
Consumer electronics configuration and user preference storage
Automotive system settings and fault logs
Medical device calibration and patient data storage
Networking equipment MAC address and configuration storage

مقدمة المنتج:25LC256T-I/SN مقدمة المنتج

The 25LC256T-I/SN from Microchip Technology is a 256-Kbit SPI bus serial EEPROM organized as 32,768 x 8-bit, operating from 2.5V to 5.5V with clock frequencies up to 10 MHz. The device supports SPI modes 0 and 3, providing flexible interface compatibility with most microcontrollers. Page size is 64 bytes with self-timed erase and write operations completing in 5 ms maximum. The device features block write protection selectable for 1/4, 1/2, or the entire array, a hardware write protect pin (WP), and status register with write-in-progress and write-enable latch bits. Endurance exceeds 1 million erase/write cycles with data retention greater than 200 years.

مبدأ العمل:25LC256T-I/SN مبدأ العمل

The 25LC256T-I/SN uses a standard SPI serial interface with four signal lines: CS (chip select), SCK (serial clock), SI (serial input), and SO (serial output). (1) Read Operation: The master asserts CS, sends the READ opcode (03h) followed by a 16-bit address, and the device shifts out data on SO starting from the addressed location. Sequential reads continue automatically incrementing the address. (2) Write Operation: Before writing, the WRITE ENABLE (WREN, 06h) opcode must be sent to set the write enable latch. Then the master sends the WRITE opcode (02h) with a 16-bit starting address and up to 64 bytes of data (one page). The device self-times the internal erase and write cycle, completing within 5 ms. The status register WIP bit indicates when the write is complete. (3) Write Protection: The WP pin protects the status register, while the BP0 and BP1 bits in the status register select the protected portion of the memory array.

وصف الدبوس:25LC256T-I/SN تعريف الدبوس ووظائفه

دبوس	الاسم	النوع	الوظيفة
1	CS	المدخلات	Chip select (active low)
2	SO	المخرجات	Serial data output (MISO)
3	WP	المدخلات	Write protect pin (active low)
4	VSS	الطاقة	أرضي
5	SI	المدخلات	Serial data input (MOSI)
6	SCK	المدخلات	Serial clock input
7	HOLD	المدخلات	Suspend serial communication (active low)
8	VCC	الطاقة	Supply voltage (2.5-5.5V)

Application Scenarios:In which products and applications is25LC256T-I/SN مستعمل

Industrial control parameter storage and calibration data retention exceeding 200 years
Consumer electronics configuration and user preference storage with SPI interface
Automotive system fault log and configuration storage with block write protection
Medical device calibration data with >1M cycle endurance for frequent updates
Networking equipment MAC address and serial number storage with write protect

Alternative Models:What chips are recommended as replacements for 25LC256T-I/SN

الشركة المصنعة	رقم الجزء	الحزمة	الملاحظات
الرقاقة الدقيقة	25AA256T-I/SN	SOIC-8	1.8V to 5.5V version
STMicroelectronics	M95256-WMN6	SOIC-8	Pin-compatible, 2.5-5.5V
أونسمي	CAT25C256WI	SOIC-8	Pin-compatible alternative
روهم	BR25H256FVM-W	TSSOP-8	Smaller package option