Microchip Technology AT28C010-12JU-076

Overview

AT28C010-12JU-076 from Microchip Technology is a 1-Mbit (128K × 8) paged parallel EEPROM with 120 ns read access time, JEDEC-standard byte-wide pinout, and industrial temperature range (–40°C to +85°C). It supports automatic 1–128-byte page writes with internal latching and timer, operates from a single 5V ±10% supply, and delivers 40 mA active current with 200 µA CMOS standby current for embedded system firmware storage.

For engineers reviewing the AT28C010-12JU-076 datasheet, AT28C010-12JU-076 pinout, AT28C010-12JU-076 application, or AT28C010-12JU-076 equivalent, key selection criteria include page-write timing (≤10 ms), DATA Polling/Toggle Bit write-completion detection, hardware/software data protection, and compatibility with legacy SRAM-based memory interfaces in industrial control and instrumentation systems.

Technical Context

The AT28C010-12JU-076 implements a paged architecture with a dedicated 128-byte internal latch that decouples bus activity during write cycles. Its dual-line chip enable (CE) and output enable (OE) logic enables flexible bus contention management in multi-device systems.

Write operation relies on either hardware-level VCC sensing (write inhibited below 3.8 V) and noise filtering (<15 ns pulse rejection), or software-controlled data protection via three-byte command sequences (AAh/55h/A0h for enable; AAh/55h/80h/AAh/20h/55h for disable), with protected writes requiring reissuance of the sequence.

Key Specifications

Pinout & Package

AT28C010-12JU-076 uses a 32-lead PLCC (Plastic Leaded Chip Carrier) package with JEDEC-standard byte-wide pinout. Pin 1 is No Connect (NC) per datasheet DS20006331A-page 3.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AT28C010-15JU, the AT28C010-12JU-076 delivers tighter 120 ns read timing for latency-critical boot paths; versus MX29LV160DBTI-70G, it retains SRAM-like simplicity and automatic page write-critical for legacy system upgrades where minimal firmware modification is required.

Availability

AT28C010-12JU-076 is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device calibration data retention, and test equipment configuration memory requiring stable component supply and long-lifecycle support.

Supply support for AT28C010-12JU-076 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 U.S.-based semiconductor company specializing in microcontrollers, analog components, and nonvolatile memory solutions, with a focus on industrial, automotive, and communications markets.

The AT28C010 product line delivers high-reliability parallel EEPROMs designed for legacy system upgrades and applications demanding SRAM-compatible timing, robust data protection, and long-term data integrity without complex wear-leveling firmware.

FAQ

What is the maximum page write size supported by the AT28C010-12JU-076?

The AT28C010-12JU-076 supports up to 128 bytes per page write operation, enabled by its internal 128-byte address and data latch. Each byte must be loaded within 150 µs of the prior byte (tBLC), and all addresses must reside on the same page defined by A7–A16. This capability allows efficient bulk updates without CPU intervention during the internal programming phase, making the AT28C010-12JU-076 ideal for configuration storage in resource-constrained systems.

Does the AT28C010-12JU-076 require external circuitry for write protection?

No, the AT28C010-12JU-076 integrates both hardware and software write protection. Hardware protection includes VCC sensing (inhibits writes below ~3.8 V), a 5 ms power-on delay, and noise filtering for sub-15 ns pulses on CE/WE. Software protection is enabled via a three-byte command sequence (AAh/55h/A0h) and remains active through power cycles. These features eliminate the need for external lock bits or discrete protection circuitry in the AT28C010-12JU-076 design.

How does DATA Polling work on the AT28C010-12JU-076 during a write cycle?

During a write cycle, reading the last written byte from the AT28C010-12JU-076 causes I/O7 to output the complement of the written data. Once the internal programming completes, I/O7 returns the true data value-indicating write completion. This allows the host to poll I/O7 asynchronously without fixed delays or interrupts. The AT28C010-12JU-076 supports this feature across all operating conditions and requires no additional timing margins beyond standard read access specifications.

Is the AT28C010-12JU-076 pin-compatible with standard SRAM devices?

Yes, the AT28C010-12JU-076 uses a JEDEC-approved byte-wide pinout identical to common 128K × 8 SRAMs (e.g., IS61LV12816), including matching A0–A16, I/O0–I/O7, CE, OE, and WE assignments. Its read timing (120 ns) and TTL/CMOS-compatible signaling allow direct substitution in existing SRAM sockets without layout changes-provided write-cycle handling (page write, polling) is implemented in firmware. This makes the AT28C010-12JU-076 a seamless upgrade path for adding nonvolatility.

What packaging and marking details identify the AT28C010-12JU-076?

The AT28C010-12JU-076 uses a 32-lead PLCC package with matte tin (Sn) finish and industrial temperature grade (–40°C to +85°C). Topside marking includes "AT28C010-12JU" followed by lot trace code; the "12" denotes 120 ns speed, "J" specifies PLCC, and "U" indicates industrial grade and green (Pb/Halide-free) packaging. Pin 1 is designated as No Connect (NC), consistent with Microchip's DS20006331A specification for this variant.