Microchip Technology AT28C010-12TC

Overview

AT28C010-12TC 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 and instrumentation systems.

For engineers reviewing the AT28C010-12TC datasheet, AT28C010-12TC pinout, AT28C010-12TC application, or AT28C010-12TC equivalent, key selection criteria include verified 120 ns read timing, 128-byte page write capability, CMOS/TTL I/O compatibility, JEDEC-compliant 32-pin TSOP package, and industrial temperature range support (-40°C to +85°C).

Technical Context

The AT28C010-12TC implements a paged architecture with an internal 128-byte register that latches address and data during write operations, freeing the bus for concurrent system activity. Its dual-line chip enable (CE) and output enable (OE) control enables flexible bus contention management in SRAM-like interface designs.

Write completion is confirmed via DATA polling on I/O7 (complement-to-data behavior) or toggle-bit monitoring on I/O6, both operable at any point during the internal 10 ms programming period. Hardware write inhibition includes VCC sense (<3.8 V), 5 ms power-on delay, and noise filtering for sub-15 ns pulses on WE/CE.

Key Specifications

Pinout & Package

AT28C010-12TC is packaged in a 32-lead Plastic Thin Small Outline Package (TSOP), JEDEC MO-142 DD compliant, with 0.5 mm lead pitch and body dimensions of 12.0 × 20.0 mm.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AT28C010-12TC, the AT28C010-12JI provides identical electrical performance in a different package for mechanical flexibility, while the AT28C010-15TC trades 30 ns read speed and 5 ms write latency for broader timing margin and potential cost reduction in less demanding applications.

Availability

AT28C010-12TC is available at Aetrix Electronics and suitable for industrial control systems, medical instrumentation, automotive body electronics, and automated test equipment requiring stable component supply across extended product lifecycles.

Supply support for AT28C010-12TC 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 fabless semiconductor company specializing in microcontrollers, nonvolatile memory, and secure authentication ICs for industrial, automotive, and consumer applications.

The AT28C010 product line delivers paged parallel EEPROMs optimized for firmware storage and configuration retention in resource-constrained embedded systems requiring robust 5V operation and long-term data integrity.

FAQ

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

The AT28C010-12TC supports a maximum page write size of 128 bytes per internal programming cycle. This is enabled by its internal 128-byte page register, which latches address and data simultaneously. The device requires all bytes in a page write to reside on the same page defined by A7–A16, and successive bytes must be loaded within 150 µs of each other. This capability is documented in the "Page Write" section of the AT28C010-12TC datasheet and directly reduces firmware update time compared to byte-wise writes.

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

No, the AT28C010-12TC operates exclusively from a single 5V ±10% supply and does not require 12V for normal read/write operations. A 12V ±0.5V voltage is only needed for optional device identification memory access (addresses 1FF80H–1FFFFH) and is not used for standard array programming. All standard byte and page writes, including software chip erase, execute at 5V. This eliminates the need for charge pumps or external high-voltage generators in the AT28C010-12TC system design.

How is write completion detected on the AT28C010-12TC?

Write completion on the AT28C010-12TC is detected using two hardware-supported methods: DATA polling on I/O7 (which returns the complement of the last written byte until completion) and toggle-bit monitoring on I/O6 (which toggles between 0 and 1 during programming and stabilizes upon completion). Both methods are asynchronous and can be initiated at any time during the 10 ms internal write cycle. These mechanisms eliminate the need for fixed timing delays and are fully specified in the AT28C010-12TC AC characteristics table.

Is the AT28C010-12TC pin-compatible with standard EPROMs like the 27C512?

The AT28C010-12TC uses a JEDEC-approved byte-wide pinout identical to the 27C512 EPROM, making it a direct hardware replacement in most 32-pin DIP/PLCC/TSOP sockets. However, functional compatibility requires verifying CE/OE/WE control timing and ensuring the host system supports the AT28C010-12TC's write-enable protocol and data polling mechanism instead of UV-erase dependency. The AT28C010-12TC retains the same A0–A15, I/O0–I/O7, CE, OE, and VCC/GND pin assignments as the 27C512, with A16 added for full 128K addressing.

What is the endurance rating of the AT28C010-12TC and how is it validated?

The AT28C010-12TC is rated for 10,000 write/erase cycles per memory location, as confirmed by Atmel's accelerated life testing per JESD22-A117. This endurance specification applies to both byte and page write operations and is guaranteed across the full industrial temperature range (-40°C to +85°C). The AT28C010-12TC datasheet explicitly states this value in the "High Reliability CMOS Technology" feature list and DC characteristics table, and it reflects worst-case cycling under specified VCC and timing conditions.