24FC256-I/P Microchip Integrated Circuit (Dual-In-Line Packages) In Stock
Microchip 24FC256-I/P is a 256 Kbit I2C serial EEPROM with 1 MHz bus speed, 1 million write/erase cycle endurance, 200-year data retention, and 8-pin DIP package, offering non-volatile storage for industrial and consumer embedded systems.
- Manufacturer
- Microchip
- Package
- Dual-In-Line Packages
- Pin Count
- 8
- Lifecycle
- ACTIVE
- Datasheet
- 24FC256-I/P Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.5304(MOQ 1)
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 256 Kbit (32 KB) I2C EEPROM with 1 MHz fast-mode I2C bus for rapid serial data access
- 1 million write/erase cycle endurance and 200-year minimum data retention for long-service-life applications
- Wide supply voltage operation from 2.5 V to 5.5 V covering 3.3 V and 5 V system rails
- 8-pin PDIP-8 through-hole package ideal for prototyping and low-volume production
Applications
The 24FC256-I/P is used for storing configuration data, calibration tables, and firmware parameters in industrial controllers, medical devices, and consumer electronics requiring non-volatile memory. Its 1 MHz I2C interface enables fast reads at up to 32 KB capacity, sufficient for data-logging applications in smart meters and sensor nodes. The 8-pin DIP footprint makes it a standard drop-in for breadboard prototyping, repair, and legacy system maintenance.
Specifications
| Pbfree Code | Yes |
| Manufacturer Package Code | PDIP-8 |
| Factory Lead Time | 8Weeks |
| YTEOL | 8 |
| Clock Frequency-Max (fCLK) | 1MHz |
| Data Retention Time-Min | 200 |
| Endurance | 1000000 Write/Erase Cycles |
| I2C Control Byte | 1010DDDR |
| JESD-30 Code | R-PDIP-T8 |
| JESD-609 Code | e3 |
| Memory Density | 262144bit |
| Memory IC Type | EEPROM |
| Memory Width | 8 |
| Number of Functions | 1 |
| Number of Ports | 1 |
| Number of Words | 32768words |
| Number of Words Code | 32000 |
| Operating Mode | SYNCHRONOUS |
| Organization | 32KX8 |
| Output Characteristics | OPEN-DRAIN |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | DIP8,.3 |
| Package Shape | RECTANGULAR |
| Package Style | IN-LINE |
| Parallel/Serial | SERIAL |
| Programming Voltage | 2.5V |
| Qualification Status | Not Qualified |
| Reverse Pinout | NO |
| Screening Level | AEC-Q100 |
| Serial Bus Type | I2C |
| Standby Current-Max | 0.000005A |
| Supply Current-Max | 0.003mA |
| Supply Voltage-Max (Vsup) | 5.5V |
| Supply Voltage-Min (Vsup) | 1.7V |
| Supply Voltage-Nom (Vsup) | 2.5V |
| Surface Mount | NO |
| Technology | CMOS |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | THROUGH-HOLE |
| Terminal Pitch | 2.54mm |
| Terminal Position | DUAL |
| Write Cycle Time-Max (tWC) | 5ms |
| Write Protection | HARDWARE |
| Package | Dual-In-Line Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.32.00.51 |
| Country of Origin | Thailand |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for 24FC256-I/P:
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Frequently Asked Questions
How many bytes can the 24FC256-I/P store and how fast can data be accessed over I2C?
The 24FC256-I/P stores 32 KB (256 Kbits) of non-volatile EEPROM data and supports I2C clock speeds up to 1 MHz in fast-plus mode. Sequential reads can transfer an entire 32 KB array in approximately 260 ms at 1 MHz, making it adequate for configuration data retrieval at power-up in embedded systems.
For a battery-backed IoT sensor node, how does 24FC256-I/P's 200-year data retention meet long-field-life requirements?
With a minimum 200-year data retention rating at 25°C, the 24FC256-I/P ensures stored calibration constants and device IDs remain intact throughout a 20-year product lifetime without power, far exceeding typical IoT sensor node service intervals. Combined with 1 million write/erase cycle endurance at 8-byte page granularity, it reliably handles frequent sensor logging without wear-out at typical update rates of under 100 writes per day.
How does the I2C address scheme of 24FC256-I/P allow multiple devices on one bus?
The 24FC256-I/P uses the I2C control byte format 1010DDDR where D pins (A0, A1, A2) set the 3-bit device address, allowing up to 8 devices on a single I2C bus. This enables a total of 8 × 32 KB = 256 KB of addressable non-volatile storage using a shared 2-wire SDA/SCL bus with a single 1 MHz clock line.
When would an engineer choose the 24FC256-I/P DIP-8 over an SMD variant of the same memory?
Engineers choose the 24FC256-I/P PDIP-8 through-hole variant for hand-soldered prototyping, socketed designs requiring easy field replacement, or legacy board repairs where SMD rework equipment is unavailable. The 0.3-inch DIP footprint is insertion-compatible with standard breadboards and IC sockets, reducing initial development cost compared to sourcing custom SMD reflow tooling for low-volume builds under 500 units.
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| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $0.8600 | $0.86 |
| 3+ | $0.6906 | $2.07 |
| 12+ | $0.5304 | $6.36 |
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