Microchip Technology AT28C010-12TU-T

Overview

AT28C010-12TU-T from Microchip Technology is a 1-Mbit (128K × 8) paged parallel EEPROM with 120 ns read access time, single 5V ±10% supply operation, and JEDEC-approved byte-wide pinout. It supports automatic 1–128-byte page writes with internal latching and timer control, and delivers 40 mA active current and 200 µA CMOS standby current for embedded nonvolatile storage in industrial control systems.

For engineers reviewing the AT28C010-12TU-T datasheet, AT28C010-12TU-T pinout, AT28C010-12TU-T application, or AT28C010-12TU-T equivalent, key selection criteria include verified page-write timing (≤10 ms), DATA Polling/Toggle Bit write-completion detection, hardware + software data protection, industrial temperature range (−40°C to +85°C), and green PLCC/TSOP packaging compliance.

Technical Context

The AT28C010-12TU-T implements a static RAM-compatible parallel interface with dual-line chip enable (CE) and output enable (OE) control to prevent bus contention. Its internal 128-byte page register latches address and data during write initiation, decoupling the host bus for concurrent operations.

Write completion is confirmed via I/O7 DATA Polling (complement-to-data toggle) or I/O6 Toggle Bit behavior-both functional without external timing components. Hardware protection includes VCC sense (<3.8 V inhibit), 5 ms power-on delay, and noise filtering on WE/CE inputs.

Key Specifications

Pinout & Package

AT28C010-12TU-T is supplied in a 32-lead PLCC (Plastic Leaded Chip Carrier) package with matte tin (Sn) terminal finish, compliant with JEDEC MO-142 BD for TSOP variants and JEDEC MS-026 for PLCC. Pin 1 is marked by a corner chamfer per Microchip Drawing C04-023B.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AT28C010-12TU-T, the -15TU-T offers identical functionality at reduced speed for cost-sensitive industrial controls, while MX28LV160CBTI-12G provides greater density and voltage scaling but demands layout and driver changes - neither is pin-compatible, and only the -15TU-T shares full functional equivalence.

Availability

AT28C010-12TU-T is available at Aetrix Electronics and suitable for industrial automation, medical diagnostics, and automotive body electronics requiring stable component supply, long-lifecycle support, and green packaging compliance.

Supply support for AT28C010-12TU-T 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 provider of microcontrollers, analog, FPGA, and memory solutions, with leadership in embedded control and nonvolatile storage technologies.

The AT28C010 belongs to Microchip's legacy parallel EEPROM product line, designed specifically for industrial and automotive systems requiring robust, pin-compatible replacements for aging EPROM/SRAM-based configurations.

FAQ

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

The AT28C010-12TU-T supports up to 128 bytes per page write operation. This is enabled by its internal 128-byte page register, which latches address and data on the first write pulse and automatically executes the full page program cycle internally. The AT28C010-12TU-T requires all bytes in a given page write to reside within the same 128-byte boundary defined by address bits A7–A16, and each successive byte must be loaded within 150 µs of the prior one.

Does the AT28C010-12TU-T require external high-voltage programming circuitry?

No, the AT28C010-12TU-T operates from a single 5V ±10% supply and does not require external high-voltage programming. All write and erase functions-including byte write, page write, and optional chip erase-are performed using standard 5V logic levels. The AT28C010-12TU-T integrates internal charge pumps and voltage regulation, eliminating the need for 12V or other auxiliary supplies during normal operation or field updates.

How does hardware data protection work on the AT28C010-12TU-T?

Hardware data protection on the AT28C010-12TU-T includes four mechanisms: (1) VCC sense that inhibits writes if supply drops below ~3.8 V; (2) 5 ms internal power-on delay before enabling writes; (3) write inhibition when OE is low, CE is high, or WE is high; and (4) noise filtering rejecting input pulses <15 ns on WE or CE. These features operate autonomously - no firmware intervention is needed - and are active during AT28C010-12TU-T power-up, brown-out, and reset conditions.

Can the AT28C010-12TU-T be used in place of an EPROM in existing designs?

Yes, the AT28C010-12TU-T can replace UV-erasable EPROMs such as the 27C010 in many cases due to its JEDEC-approved byte-wide pinout, 5V operation, and static RAM-like read interface. However, unlike EPROMs, the AT28C010-12TU-T supports in-system electrical erasure and programming without removal or UV exposure. Designers must verify timing compatibility (120 ns access vs. EPROM's typical 150–250 ns) and ensure write-protection logic aligns with the AT28C010-12TU-T's hardware/software schemes.

What is the purpose of the extra 128 bytes of EEPROM in the AT28C010-12TU-T?

The AT28C010-12TU-T includes 128 bytes of dedicated identification EEPROM located at addresses 1FF80H–1FFFFH. These bytes are accessible only when A9 is raised to 12V ±0.5V and are intended for permanent device serialization, calibration traceability, or manufacturer-specific tracking data. This area is electrically isolated from the main 128K × 8 array and retains data independently, providing a secure, tamper-resistant zone for critical metadata in the AT28C010-12TU-T.