Microchip Technology AT28C010-25FM/883

Overview

AT28C010-25FM/883 from Microchip Technology is a military-grade 1-Mbit (131,072 × 8) paged parallel EEPROM with 120 ns read access time, 10 ms maximum page write cycle, and single 5V ±10% supply operation. It features hardware and software data protection, DATA polling for write completion detection, and JEDEC-approved byte-wide pinout. It serves as nonvolatile program/data storage in avionics control modules requiring MIL-STD-883 compliance.

For engineers reviewing the AT28C010-25FM/883 datasheet, AT28C010-25FM/883 pinout, AT28C010-25FM/883 application, or AT28C010-25FM/883 equivalent, key selection criteria include its -55°C to +125°C operating temperature range, 10,000/100,000 endurance cycles, CMOS/TTL-compatible I/O, 300 µA standby current, and 32-lead flatpack packaging per MIL-STD-1835.

Technical Context

The AT28C010-25FM/883 implements a paged architecture with a 128-byte internal latch, enabling simultaneous write of 1–128 bytes within a single page defined by A7–A16. Its dual-line chip enable (CE) and output enable (OE) control supports bus contention avoidance in shared-memory systems.

Write operations are validated via DATA polling on I/O7 (complement-to-data during programming, true data upon completion) or toggle-bit monitoring on I/O6. Hardware protection includes VCC sense (<3.8 V inhibits writes), 5 ms power-on delay, and noise filtering on WE/CE inputs (rejects <15 ns pulses).

Key Specifications

Pinout & Package

AT28C010-25FM/883 is supplied in a 32-lead ceramic flatpack (MIL-STD-1835 MO-115 AA), measuring 21.08 mm × 9.40 mm × 3.05 mm, with lead pitch of 1.27 mm and index corner marking for orientation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AT28C010-25JM/883, the AT28C010-25FM/883 offers identical functionality in a lower-profile flatpack suitable for space-constrained avionics modules; versus AT28C256-25JM/883, it provides double capacity and advanced page-write control essential for modern firmware partitioning.

Availability

AT28C010-25FM/883 is available at Aetrix Electronics and suitable for avionics control units, tactical radio systems, missile guidance electronics, and naval radar modules requiring stable component supply under extended temperature and radiation-hardened conditions.

Supply support for AT28C010-25FM/883 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 is a global semiconductor manufacturer specializing in microcontrollers, analog devices, and memory solutions, with a focus on high-reliability and automotive-grade components.

The AT28C010 product line delivers radiation-tolerant, temperature-hardened parallel EEPROMs designed for mission-critical defense electronics where data integrity and long-term retention are non-negotiable.

FAQ

What is the guaranteed minimum endurance rating for AT28C010-25FM/883?

The AT28C010-25FM/883 is specified for either 10,000 or 100,000 write/erase cycles depending on test conditions and screening level. This dual rating reflects qualification under both standard and enhanced reliability test flows per MIL-STD-883, with the 100,000-cycle rating applicable to fully screened lots used in strategic systems. The AT28C010-25FM/883 retains data for 10 years under rated operating conditions regardless of endurance grade selected.

Does AT28C010-25FM/883 support hardware write protection independent of software commands?

Yes, AT28C010-25FM/883 incorporates four hardware write protection mechanisms: VCC sense circuitry that disables writes below 3.8 V, a 5 ms power-on delay timer, active inhibition when OE is low/CE is high/WE is high, and a noise filter rejecting sub-15 ns pulses on WE or CE. These operate autonomously without firmware involvement and are active immediately after power-up, ensuring AT28C010-25FM/883 remains protected during brown-out recovery or reset sequences.

How is write completion detected on AT28C010-25FM/883 without using an external timer?

AT28C010-25FM/883 supports two hardware-based write completion detection methods: DATA polling on I/O7 (returns complement of written data until completion, then true data) and toggle-bit monitoring on I/O6 (toggles between 0 and 1 during programming, stabilizes upon completion). Both methods eliminate reliance on fixed delay timers and allow precise synchronization in interrupt-driven or real-time OS contexts. The AT28C010-25FM/883 guarantees these signals reflect actual internal state, not estimated timing.

What package type is designated by the '/FM' suffix in AT28C010-25FM/883?

The '/FM' suffix in AT28C010-25FM/883 indicates a 32-lead ceramic flatpack package conforming to JEDEC MO-115 AA outline, with dimensions of 21.08 mm × 9.40 mm × 3.05 mm and 1.27 mm lead pitch. This package is distinct from '/JM' (CERDIP) and '/UM' (PGA) variants and is optimized for surface-mount assembly in high-reliability military PCBs where low profile and hermetic sealing are required. The AT28C010-25FM/883 flatpack undergoes full MIL-STD-883 testing including thermal shock and fine-leak helium testing.

Can AT28C010-25FM/883 be used as a direct replacement for older 27C256 EPROMs in existing designs?

No, AT28C010-25FM/883 is not a pin-compatible or functional drop-in replacement for 27C256 EPROMs due to fundamental differences: AT28C010-25FM/883 requires active WE control and supports page writes, whereas 27C256 uses OE/CE-only read and requires UV erasure. However, its JEDEC byte-wide pinout matches 27C256's signal assignments (A0–A15, I/O0–I/O7, CE, OE), enabling redesign with minimal layout changes if write-enable logic and 5V-only supply are added. The AT28C010-25FM/883 eliminates UV window and eraser dependency entirely.