Microchip Technology AT28C010E-20JI

Overview

AT28C010E-20JI from Microchip Technology (formerly Atmel) is a 1 Mbit (128K × 8) paged parallel EEPROM with JEDEC-standard byte-wide pinout, 200 ns maximum read access time, 10 ms page write cycle, and industrial temperature range (–40°C to +85°C). It supports hardware/software data protection, DATA polling, and toggle-bit write completion detection for embedded firmware storage in programmable logic controllers and industrial I/O modules.

For engineers reviewing the AT28C010E-20JI datasheet, AT28C010E-20JI pinout, AT28C010E-20JI application, or AT28C010E-20JI equivalent, this device delivers verified 100,000-cycle endurance, 10-year data retention, CMOS/TTL-compatible I/O, single 5V ±10% supply operation, and PLCC-32 packaging suitable for legacy board designs requiring field-upgradable nonvolatile memory.

Technical Context

The AT28C010E-20JI implements a paged architecture with a 128-byte internal page register, enabling simultaneous write of 1–128 bytes per internal programming cycle. Its dual-line chip enable (CE) and output enable (OE) control allows bus contention avoidance in shared-memory systems.

Write operations are self-timed using an internal control timer; completion is signaled via DATA polling on I/O7 or toggle-bit behavior on I/O6. Hardware protection includes VCC sense (<3.8 V inhibit), 5 ms power-on delay, noise filtering (<15 ns pulse rejection), and CE/OE/WE state-based write inhibition.

Key Specifications

Pinout & Package

AT28C010E-20JI is packaged in a 32-lead Plastic J-Leaded Chip Carrier (PLCC-32), JEDEC MS-016AE compliant, with pin 1 marked by index notch and designated "Don't Connect" (DC) per datasheet note.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AT28C010-20JI, the AT28C010E-20JI provides tenfold endurance for field-programmable use cases, while the MX28LV160CBTI-20G offers greater capacity but demands full electrical and mechanical redesign - making AT28C010E-20JI the sole direct-replacement option for legacy industrial upgrades.

Availability

AT28C010E-20JI is available at Aetrix Electronics and suitable for industrial automation, medical diagnostics, and telecom infrastructure applications requiring stable component supply, long-lifecycle support, and verified high-endurance nonvolatile memory.

Supply support for AT28C010E-20JI 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 acquired Atmel in 2016 and maintains full product continuity, documentation, and support for the AT28C010E family.

The AT28C010E series was designed specifically for industrial and automotive applications demanding high-reliability, field-upgradable parallel EEPROM with robust write-protection and extended data retention - targeting legacy systems where serial EEPROM bandwidth or SPI interface latency is unacceptable.

FAQ

What is the guaranteed write endurance of the AT28C010E-20JI?

The AT28C010E-20JI is specified for 100,000 write/erase cycles - a tenfold improvement over the standard AT28C010 variant. This endurance rating is validated per JEDEC standards and applies across the full industrial temperature range (–40°C to +85°C). The 'E' suffix explicitly denotes this high-endurance version, making AT28C010E-20JI appropriate for systems requiring frequent field updates such as programmable logic controllers and test equipment calibration storage.

Does the AT28C010E-20JI support both hardware and software write protection?

Yes, the AT28C010E-20JI implements dual-layer write protection. Hardware protection includes VCC sensing (inhibits writes below ~3.8 V), 5 ms power-on delay, noise filtering for sub-15 ns pulses on WE/CE, and state-based inhibition (e.g., WE high blocks writes). Software Data Protection (SDP) requires a three-byte unlock sequence (AAh/55h/A0h) to enable writes - a feature shipped disabled and configurable per system security needs. Both mechanisms operate independently in AT28C010E-20JI.

What package type and pin count does the AT28C010E-20JI use?

The AT28C010E-20JI uses a 32-lead Plastic J-Leaded Chip Carrier (PLCC-32) package, JEDEC MS-016AE compliant. Pin 1 is marked by an index notch and designated "Don't Connect" (DC) per the official datasheet. This package provides robust thermal and mechanical performance for industrial PCBs and is compatible with standard PLCC sockets and reflow profiles. No other package variants (e.g., PDIP or TSOP) are assigned to the AT28C010E-20JI ordering code.

How is write completion detected on the AT28C010E-20JI?

Write completion on the AT28C010E-20JI is detectable via two independent methods: DATA polling on I/O7 (complement of last written byte appears until completion) and toggle-bit behavior on I/O6 (repeated reads cause I/O6 to toggle until write finishes). Both methods are fully supported in byte and page write modes and require no external components. These features allow AT28C010E-20JI to integrate seamlessly into interrupt-driven or polling-based firmware architectures without fixed timing assumptions.

Is the AT28C010E-20JI compatible with 5 V TTL and CMOS logic families?

Yes, the AT28C010E-20JI features fully CMOS- and TTL-compatible inputs and outputs. Input thresholds meet standard TTL levels (VIL ≤ 0.8 V, VIH ≥ 2.0 V), and output drive meets both TTL (IOH = –400 µA, VOH ≥ 2.4 V) and CMOS (IOH = –100 µA, VOH ≥ 4.2 V at VCC = 4.5 V) specifications. This dual compatibility ensures reliable interfacing with legacy 8051, Z80, and FPGA-based controllers without level-shifting circuitry - a key design advantage preserved in AT28C010E-20JI.