Microchip Technology AT28C010-12JC

Overview

AT28C010-12JC from Atmel is a 1-Mbit (128K × 8) paged parallel EEPROM with JEDEC-standard byte-wide pinout, 120 ns read access time, 10 ms maximum page write cycle, and single 5V ±10% supply operation. It supports hardware/software data protection, DATA polling, and toggle-bit write completion detection for embedded firmware storage in industrial control systems.

For engineers reviewing the AT28C010-12JC datasheet, AT28C010-12JC pinout, AT28C010-12JC application, or AT28C010-12JC equivalent, key selection criteria include its 128-byte page register architecture, CMOS/TTL-compatible I/O, 200 µA standby current, and PLCC-32 industrial-temperature packaging for legacy system upgrades and field-programmable memory replacement.

Technical Context

The AT28C010-12JC implements a paged write architecture with an internal 128-byte latch that accepts up to 128 bytes within 150 µs per byte (tBLC), enabling efficient firmware updates without bus hold. Its dual-line CE/OE control allows SRAM-like read access while preventing bus contention during active cycles.

Write operations are validated via DATA polling on I/O7 (complement-to-data during write, true data upon completion) or toggle-bit monitoring on I/O6. Hardware protection includes VCC sense (<3.8V inhibit), 5 ms power-on delay, noise filtering (<15 ns pulse rejection), and CE/OE/WE state-based write inhibition.

Key Specifications

Pinout & Package

AT28C010-12JC is packaged in a 32-lead Plastic J-leaded Chip Carrier (PLCC-32) with JEDEC MS-016 AE outline, industrial temperature range (–40°C to +85°C), and pin 1 marked by index notch. Pin 1 is designated "Don't Connect" (DC) per datasheet.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AT28C010-12JC, AT28C256-15PC offers lower cost but sacrifices page-write speed and density, while MN63C256F-12L provides SMT compatibility at the expense of 50% page capacity and vendor-specific command sets - making AT28C010-12JC optimal for legacy PLCC-based systems needing full 1-Mbit paged updates.

Availability

AT28C010-12JC is available at Aetrix Electronics and suitable for industrial control systems, medical device configuration storage, and automotive body electronics requiring stable component supply with long lifecycle support.

Supply support for AT28C010-12JC 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

Atmel Corporation (now part of Microchip Technology) is a semiconductor manufacturer specializing in microcontrollers, nonvolatile memory, and secure authentication ICs.

The AT28C010 product line was designed for byte-addressable, paged parallel EEPROM applications in industrial and automotive systems requiring SRAM-compatible interfaces and robust data retention.

FAQ

What is the maximum page write size supported by the AT28C010-12JC?

The AT28C010-12JC supports a maximum page write size of 128 bytes, enabled by its internal 128-byte page register. This allows up to 128 bytes to be loaded sequentially within 150 µs per byte (tBLC), after which the device automatically executes the internal programming cycle. The AT28C010-12JC requires all bytes in a page write to reside on the same page defined by address bits A7–A16, and A0–A6 select individual bytes within that page.

Does the AT28C010-12JC require a 12V programming voltage?

No, the AT28C010-12JC operates from a single 5V ±10% supply for both read and write operations. A 12V supply is only required for optional device identification memory (128 bytes at addresses 1FF80H–1FFFFH) and is not used during normal firmware or configuration storage. All standard AT28C010-12JC read/write functions execute at 5V, eliminating need for charge pumps or external high-voltage generators.

How does hardware data protection work in the AT28C010-12JC?

Hardware data protection in the AT28C010-12JC includes four mechanisms: (1) VCC sense circuitry inhibits writes if supply drops below ~3.8V; (2) a 5 ms internal power-on delay prevents writes until VCC stabilizes; (3) write is blocked unless CE is low, OE is high, and WE is low simultaneously; and (4) input noise filters reject pulses <15 ns on CE or WE. These features ensure the AT28C010-12JC remains immune to spurious writes during power-up, brown-out, or EMI events.

Can the AT28C010-12JC be used as a direct replacement for SRAM in existing designs?

Yes, the AT28C010-12JC supports SRAM-compatible read timing (120 ns access, CE/OE dual-line control) and JEDEC-standard byte-wide pinout, enabling drop-in replacement in many legacy systems. However, write operations require explicit WE control and status polling (via I/O7 or I/O6), so host firmware must be modified to manage write cycles - the AT28C010-12JC cannot emulate SRAM write behavior without software adaptation.

What is the endurance rating of the AT28C010-12JC and how is it verified?

The AT28C010-12JC is rated for 10,000 write/erase cycles (10⁴), as specified in the official Atmel datasheet Rev. 0353E–06/99. This endurance value is determined through accelerated life testing under standard conditions (VCC = 5V, TA = 25°C) and applies to both byte and page write operations. The AT28C010-12JC does not include the "E" suffix (e.g., AT28C010E), which denotes the higher 100,000-cycle variant; endurance is not user-configurable and is fixed per part number.