Microchip Technology AT28C010E-12JU

Overview

AT28C010E-12JU from Microchip Technology is a 1-Mbit (128K × 8) paged parallel EEPROM with JEDEC-standard byte-wide pinout, 120 ns read access time, and 10 ms maximum page write cycle time. It operates from a single 5V ±10% supply, supports industrial temperature range (−40°C to +85°C), and delivers 200 µA CMOS standby current for low-power embedded nonvolatile storage in firmware boot loaders and configuration memory.

For engineers reviewing the AT28C010E-12JU datasheet, AT28C010E-12JU pinout, AT28C010E-12JU application, or AT28C010E-12JU equivalent, key selection criteria include verified 128-byte page write capability, DATA Polling and Toggle Bit write completion detection, hardware/software data protection, 100,000-cycle endurance, and PLCC-32 packaging compatibility with legacy 5V parallel bus systems.

Technical Context

The AT28C010E-12JU implements a static RAM-compatible interface with dual-line chip enable (CE) and output enable (OE) control, enabling seamless integration into microprocessor address/data buses without external timing logic. Its internal 128-byte page register latches address and data during write operations, decoupling bus activity from internal programming timing.

Write completion is confirmed via two independent methods: DATA Polling on I/O7 (complement-to-data during write, true data upon completion) and Toggle Bit behavior on I/O6 (toggling until write ends). Hardware protection includes VCC sense (<3.8V inhibit), 5 ms power-on delay, and noise filtering on WE/CE inputs.

Key Specifications

Pinout & Package

AT28C010E-12JU is packaged in a 32-lead Plastic Leaded Chip Carrier (PLCC) with JEDEC-standard byte-wide pinout. Pin 1 is designated "Don't Connect" (NC), and the package features matte tin (Sn) terminal finish compliant with RoHS and green (Pb/Halide-free) requirements.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AT28C010E-12JU, the AT28C010-12JU offers lower endurance at identical speed and packaging-making it viable only for static firmware storage-while the AT28C010E-12TU retains full 100K-cycle capability in a smaller, lead-free TSOP package better suited for high-density SMT production.

Availability

AT28C010E-12JU is available at Aetrix Electronics and suitable for industrial control systems, telecom infrastructure equipment, and medical instrumentation requiring stable component supply, long-lifecycle support, and RoHS-compliant green packaging.

Supply support for AT28C010E-12JU 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 microcontroller, analog, FPGA, and memory solutions, with leadership in embedded control and nonvolatile storage technologies.

The AT28C010E-12JU belongs to Microchip's legacy parallel EEPROM product line, designed specifically for pin-compatible upgrades of EPROM-based systems and reliable, low-power, field-programmable memory in industrial and communications equipment.

FAQ

What is the maximum page write size supported by the AT28C010E-12JU?

The AT28C010E-12JU 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 accepts subsequent bytes within 150 µs intervals. All bytes in a single page write must reside on the same 128-byte boundary defined by address bits A7–A16. The AT28C010E-12JU does not support larger block writes or sector erases.

How does hardware data protection work on the AT28C010E-12JU?

Hardware data protection on the AT28C010E-12JU operates through four mechanisms: (1) VCC sense circuitry inhibits writes if supply voltage falls below ~3.8V; (2) a 5 ms internal power-on delay prevents writes until VCC stabilizes; (3) write inhibition occurs if OE is low, CE is high, or WE is high; and (4) input noise filters reject pulses shorter than 15 ns on WE or CE. These features ensure the AT28C010E-12JU remains immune to spurious writes during power transitions.

Can the AT28C010E-12JU be used as a direct replacement for the AT27C010 EPROM?

Yes-the AT28C010E-12JU is functionally and pinout-compatible with the AT27C010 EPROM in read mode and shares the same JEDEC-standard 32-pin layout. However, unlike the EPROM, the AT28C010E-12JU requires no UV erasure and supports in-system electrical reprogramming. To replace AT27C010, ensure the host system provides proper WE control and accommodates the AT28C010E-12JU's write timing and DATA Polling confirmation.

What is the purpose of the extra 128 bytes of EEPROM in the AT28C010E-12JU?

The AT28C010E-12JU includes an additional 128 bytes of EEPROM memory located at addresses 1FF80H–1FFFFH, accessible by raising A9 to 12V ±0.5V. This reserved area is intended for device identification, manufacturing traceability, or customer-specific metadata. It functions identically to main array memory-supporting byte and page writes-and is protected by the same hardware/software data protection features as the primary 1-Mbit array.

Does the AT28C010E-12JU support chip erase, and how is it performed?

Yes-the AT28C010E-12JU supports full-chip erase via a 6-byte software command sequence (detailed in Microchip Application Note AN20006331). Unlike page writes, chip erase clears all 131,072 words to FFH. It requires applying 12.0V ±0.5V to A9 and issuing specific address/data sequences to dedicated unlock locations. Erase time is typically under 100 ms. This function is independent of the standard page write mechanism and preserves the AT28C010E-12JU's 100,000-cycle endurance rating.