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STMicroelectronics

M24256-BRMN6TP

Name: M24256-BRMN6TP
Brand: STMicroelectronics
SKU: 774-M24256-BRMN6TP
Price: 0.25039 USD
Availability: InStock

Manufacturer:

STMicroelectronics

ERSA Part #:

774-M24256-BRMN6TP

Datasheet:

PDF Datasheet

Description:

256Kb I2C EEPROM, 400kHz, 5.5V, SOIC, SM

Standard Lead Time:

10 Weeks

RoHS Status:

Why Choose Us?

Professional Platform

B2B & B2C purchasing

Delivery at full speed

1-2 days delivery

Wide variety

Original manufacturers

365 days guarantee

Responsible quality

Tech Specifications

EU RoHS

Compliant

ECCN (US)

EAR99

Part Status

NRND

HTS

COMPONENTS

Automotive

PPAP

Chip Density (bit)

256K

Organization

32Kx8

M24256-BRMN6TP Description

STMicroelectronics | Serial EEPROM

M24256-BRMN6TP

256Kbit (32K x 8) I²C Serial EEPROM | 1.8V to 5.5V | 1MHz | Industrial Grade

✔️ Industrial Temp: -40°C to +85°C ⚡ 1MHz Fast‑Plus I²C

BRAND

M24256 Series

256Kbit
Density (32KB)

1MHz
I²C Clock

1.8-5.5V
Supply Range

64‑byte
Page Write

SOIC-8
150mil Package

Product Overview

The STMicroelectronics M24256-BRMN6TP is a 256Kbit (32,768 x 8) serial I²C EEPROM that operates over an extremely wide voltage range of 1.8V to 5.5V, making it compatible with both low‑power 1.8V systems and legacy 5V designs. It features a two‑wire I²C serial interface supporting standard (100kHz), fast (400kHz), and fast‑plus (1MHz) modes, delivering high‑speed data transfer for configuration storage, data logging, and parameter management.

Organized in 64‑byte pages, the M24256-B offers a page write capability of up to 64 bytes and a maximum write cycle time of 5 ms. The device is housed in a compact 8‑lead SOIC (150mil) package (RMN6TP suffix) and operates over the industrial temperature range of -40°C to +85°C. With 4 million write cycles and 200‑year data retention, it delivers exceptional endurance and reliability for industrial, medical, and automotive applications. The hardware write protection pin (WP) protects the entire memory array against accidental writes, while the device address pins allow up to four M24256 devices on the same I²C bus.

📊 Technical Specifications

Density / Organization	256Kbit (32,768 x 8 bits) — 32KB
Memory Interface	2-wire I²C serial bus (SDA, SCL)
Clock Frequency	1 MHz (max) — Fast‑Plus mode, also supports 400kHz/100kHz
Write Cycle Time (tW)	5 ms maximum (page write)
Page Write Size	64 bytes per page
Supply Voltage (Vcc)	1.8V – 5.5V (wide range)
Operating Temperature	Industrial: -40°C to +85°C
Storage Temperature	-65°C to +150°C
Package Type	8-lead SOIC (150mil, JEDEC MS-012) — RM code
Package Dimensions	4.9 x 3.9 x 1.5 mm (approx)
Endurance	4,000,000 write cycles (minimum)
Data Retention	200 years (minimum) @ 55°C
Active Read Current	1 mA (typical @ 5V, 1MHz)
Standby Current	1 µA (typical)
Write Protection	Hardware WP pin — protects entire array
Device Addressing	E0, E1, E2 pins allow up to 4 devices on same bus (256Kbit addressing)
RoHS / Halogen Free	Yes — “TP” suffix indicates tape & reel, Pb-free
ESD Protection	HBM > 4000V, CDM > 1000V
Moisture Sensitivity Level	MSL 1 (unlimited floor life)
Part Status	Active — In production

✨ Key Features

✅ Ultra-Wide Voltage – 1.8V to 5.5V, supports 1.8V, 2.5V, 3.3V, and 5V rails
✅ High‑Speed I²C – 1MHz Fast‑Plus mode for rapid data transfer
✅ Low Power Consumption – 1µA standby current ideal for battery‑powered designs
✅ Hardware Write Protection – WP pin prevents accidental writes to entire memory
✅ Page Write Capability – 64‑byte page write reduces programming time
✅ High Endurance – 4 million write cycles for frequent updates
✅ Long Data Retention – 200 years of data retention ensures long‑term reliability
✅ Multi‑Device Support – Up to 4 devices on the same I²C bus (E0/E1/E2 pins)
✅ Industry Standard SOIC-8 – Easy PCB layout, drop‑in replacement for many EEPROMs
✅ Industrial Temperature Range – -40°C to +85°C for harsh environments
✅ AEC-Q100 qualified option available (contact ST)
✅ Green & RoHS Compliant – Halogen‑free, lead‑free terminations

🎯 Target Applications:

Industrial control systems, medical devices, smart meters, gaming peripherals, data loggers, configuration storage for FPGA/ASIC, battery‑powered consumer electronics, and networking equipment.

⚡ I²C Performance & EEPROM Benefits

1MHz Fast‑Plus Mode

Read throughput: 128 kbyte/s
Write throughput: up to 12.8 kbyte/s (page write)

Hardware Write Protect

WP pin low = normal operation
WP pin high = full array write‑protected

Self‑Timed Write Cycle

5ms max internally controlled, no external timing components needed.

The M24256-B includes a write enable latch (WEL) that prevents accidental writes after power‑up. A write disable command resets the latch, adding an extra layer of security against unintended modifications.

🧠 Memory Organization & Addressing

The 256Kbit memory is organized as 32,768 x 8 (32KB). The device uses a two-byte address word (low and high) for random reads/writes. Page write allows up to 64 consecutive bytes to be written with a single internal write cycle, significantly improving throughput for block updates.

🔌 Hardware Address Pins (E0, E1, E2)

These pins allow up to four M24256 devices to share the same I²C bus (total bus capacity 1Mbit). The fixed I²C slave address is 1010 (binary) followed by the three address bits set by E2/E1/E0, then the read/write bit.

📦 Ordering Information & Part Number Decoder

Orderable Part Number	Temperature	Package	Description
M24256-BRMN6TP	-40°C to +85°C	SOIC-8 (150mil)	Industrial, tape & reel (2500 pcs/reel)
M24256-BRMN6P	-40°C to +85°C	SOIC-8	Tube packaging (100 pcs/tube)
M24256-BRDW6TP	-40°C to +85°C	TSSOP-8	Thin shrink package, tape & reel
M24256-BRMN6 (no TP)	-40°C to +85°C	SOIC-8	Non‑lead‑free version (contact ST)

🔍 Part Number Breakdown (M24256-BRMN6TP):
• M24256 – ST I²C serial EEPROM, 256Kbit
• -B – Supply voltage: 1.8V to 5.5V (wide range)
• R – Package: SOIC8 (150mil)
• MN6 – Industrial temperature (-40°C to +85°C)
• TP – Tape & Reel packaging (lead‑free / RoHS)

🏆 Why STMicroelectronics?

STMicroelectronics is the world’s leading supplier of serial EEPROMs, with over 30 years of experience and billions of units shipped. The M24xxx family is the industry standard for low‑density I²C EEPROMs, widely used in automotive, industrial, and consumer electronics.

#1 global supplier of serial EEPROMs – trusted by major OEMs worldwide
Ultra‑long product lifecycles – 15‑20 year availability for industrial designs
ISO 9001, IATF 16949 certified manufacturing
Automotive AEC-Q100 qualified versions available (M24256‑F series)
Excellent technical support with free samples, reference designs, and FAE assistance

🌟 Why Choose M24256-BRMN6TP?

• Widest voltage range (1.8-5.5V) – no level shifters needed

• 1MHz I²C – fastest in its class

• 4 million write cycles – exceptional endurance

• 200‑year data retention

• Drop‑in replacement for 24LC256, AT24C256

🛠️ Development Tools & Resources

📄 Complete Datasheet

48-page document with AC/DC characteristics, timing diagrams, and application notes

💻 Software Libraries

Example C code for I²C read/write, page programming, and write protection (available on ST GitHub)

🔌 Evaluation Boards

STEVAL-MKI... series daughter cards for STM32 Nucleo platforms

STMicroelectronics offers free samples, reference designs, and 24/7 technical support via their support portal. The M24256 is fully compatible with STM32CubeMX and HAL drivers.

📄 Certifications & Compliance

RoHS 2011/65/EU (Compliant)
REACH SVHC (Compliant)
Halogen‑free (IEC 61249-2-21)
Conflict minerals reporting (available upon request)
AEC-Q100 Grade 2/3 options available (contact ST)

📦 Packaging & Logistics

Tape & Reel: 2,500 pieces per 13" reel (SOIC-8)
Tube: 100 pieces per tube
Moisture Sensitivity Level: MSL 1 (unlimited)
Lead finish: NiPdAu or Sn (100% matte tin)
Lead time: 8‑12 weeks ARO (typical), stock available through distributors

FAQ

It is a 256-Kbit serial EEPROM, organized as 32K × 8 bits (32 Kbytes). It utilizes an I²C-compatible (2-wire) serial interface and supports all I²C bus modes including 100 kHz, 400 kHz, and 1 MHz. The memory array features a 64-byte page size and is protected against accidental writes by the write protect of the whole memory array.