Microchip Technology 24FC08T-I/MS

Overview

24FC08T-I/MS from Microchip Technology Inc. is an 8-Kbit I²C-compatible serial EEPROM organized as four 256 × 8-bit blocks, operating from 1.7V to 5.5V with 1 MHz clock support, 16-byte page write buffer, and hardware write-protection via WP pin. It delivers ≤1 µA standby current (I-temp), ≤1 mA read current, and >1 million erase/write cycles for embedded configuration storage in industrial control modules.

For engineers reviewing the 24FC08T-I/MS datasheet, 24FC08T-I/MS pinout, 24FC08T-I/MS application, or 24FC08T-I/MS equivalent, this page provides verified electrical specs, package mapping to MSOP-8, I²C timing compliance at 1 MHz, endurance data, and real-world use context for firmware parameter retention and calibration storage.

Technical Context

The 24FC08T-I/MS implements a two-wire I²C interface with Schmitt-trigger inputs and slope-controlled outputs to suppress noise and eliminate ground bounce. Its internal address pointer supports current-address, random, and sequential reads across four 256-word blocks selected via B1/B0 bits in the control byte.

It uses self-timed erase/write cycles with 5 ms maximum page write time and supports acknowledge polling to detect write completion. The device includes a 16-byte page latch and hardware write-protection activated when WP = VCC - functional in all packages except 4-ball CSP.

Key Specifications

Pinout & Package

24FC08T-I/MS is packaged in an 8-lead MSOP (Micro Small Outline Package) with 0.65 mm pitch, 3.0 mm × 3.0 mm body, and exposed pad option (not electrically connected). Pin 1 is marked by a beveled corner or dot.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar serial EEPROM applications.

Compared with 24AA08T-I/MS and AT24C08D-MAHM-T, the 24FC08T-I/MS uniquely combines 1 MHz I²C speed at 1.7V minimum supply, industrial temperature range, and AEC-Q100 qualification - making it optimal for next-generation automotive and industrial edge devices demanding both performance and ruggedness.

Availability

24FC08T-I/MS is available at Aetrix Electronics and suitable for industrial PLCs, medical diagnostics equipment, automotive body control modules, and smart energy meters requiring stable component supply across multi-year production cycles.

Supply support for 24FC08T-I/MS includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Microchip Technology Inc. is a leading provider of microcontrollers, analog devices, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.

The 24FC08T-I/MS belongs to Microchip's 24XX08 family of serial EEPROMs, engineered specifically for robust, low-power nonvolatile storage in space-constrained industrial, automotive, and medical systems requiring guaranteed data integrity and long-term reliability.

FAQ

What is the maximum I²C clock frequency supported by the 24FC08T-I/MS?

The 24FC08T-I/MS supports up to 1 MHz I²C clock frequency across its full 1.7V–5.5V V_CC range, unlike the 24AA08 (max 400 kHz) or 24LC08B (max 400 kHz, requires ≥2.5V). This enables faster parameter loading in time-critical applications such as motor control tuning loops. The 24FC08T-I/MS maintains full AC timing compliance including THIGH ≥260 ns and TLOW ≥500 ns at 1 MHz.

Does the 24FC08T-I/MS support hardware write-protection, and how is it implemented?

Yes, the 24FC08T-I/MS implements hardware write-protection via the WP pin: tying WP to VCC disables all write operations to the full 8-Kbit memory array (addresses 000h–3FFh), while reads remain fully functional. This feature is active in the MSOP-8 package used by 24FC08T-I/MS. The 24FC08T-I/MS does not require external logic or firmware intervention to enforce protection - it is enforced at the silicon level during power-up and remains active until WP is pulled low.

What is the endurance rating and data retention specification for the 24FC08T-I/MS?

The 24FC08T-I/MS guarantees ≥1,000,000 erase/write cycles and >200 years of data retention at +85°C ambient temperature. These specifications are measured under standard test conditions (25°C, 5.5V, page-mode writes) and validated across the industrial temperature range. The 24FC08T-I/MS achieves this through optimized floating-gate oxide stress management and charge-trapping architecture, ensuring long-term reliability in field-deployed equipment.

Which packages are available for the 24FC08T-I/MS, and what does the 'T-I/MS' suffix indicate?

The 'T-I/MS' suffix in 24FC08T-I/MS explicitly denotes Tape-and-Reel packaging (T), Industrial temperature grade (I), and MSOP-8 package (MS). Microchip's official documentation confirms MSOP-8 as a supported package for 24FC08 across both I- and E-temp grades. The MSOP-8 footprint measures 3.0 mm × 3.0 mm with 0.65 mm lead pitch and is compatible with standard reflow profiles. No other package variants (e.g., SOIC, DFN) carry the exact 'T-I/MS' suffix.

How does the 24FC08T-I/MS handle page boundaries during write operations?

The 24FC08T-I/MS enforces strict 16-byte page boundaries: any page write attempting to cross a 16-byte boundary (e.g., starting at address 0x0F and writing 16 bytes) wraps data back to the start of the same page instead of advancing to the next. This behavior is inherent to the on-chip 16-byte page latch architecture. To avoid unintended overwrites, application firmware must align page writes to modulo-16 addresses - a constraint explicitly documented in the 24FC08T-I/MS datasheet Section 6.3.