Microchip Technology AT28C010-15JI

Overview

AT28C010-15JI from Atmel is a 1-Mbit (128K × 8) paged parallel EEPROM with JEDEC-standard byte-wide pinout, 150 ns read access time, 10 ms maximum page write cycle, and industrial temperature range (–40°C to +85°C). It operates from a single 5V ±10% supply, supports hardware/software data protection, and is used in firmware storage, configuration memory, and boot code retention for embedded controllers.

For engineers reviewing the AT28C010-15JI datasheet, AT28C010-15JI pinout, AT28C010-15JI application, or AT28C010-15JI equivalent, this device delivers deterministic page-write timing, DATA polling and toggle-bit write completion detection, CMOS/TTL-compatible I/O, and VCC-sense write inhibit - critical for reliable nonvolatile storage in power-critical industrial systems.

Technical Context

The AT28C010-15JI implements a paged architecture with a 128-byte internal latching register, enabling up to 128 bytes to be written in a single internal programming period without bus hold. Its dual-line chip enable (CE) and output enable (OE) control allows flexible bus contention management during read cycles.

Write operations are self-timed using an internal control timer; byte and page writes are initiated by WE/CE edge transitions, with DATA polling on I/O7 or toggle-bit behavior on I/O6 providing deterministic end-of-write detection. Hardware protection includes VCC sense (<3.8 V inhibits write), 5 ms power-on delay, and noise filtering on WE/CE inputs.

Key Specifications

Pinout & Package

AT28C010-15JI is packaged in a 32-lead Plastic J-leaded Chip Carrier (PLCC), JEDEC MS-016 AE compliant, with pin 1 marked and designated "Don't Connect" (DC). The package is lead-free compatible and rated for industrial temperature operation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AT28C010-15JI, the -15PI offers easier manual assembly but larger board area, while the -15TI reduces height and footprint at the cost of lower mechanical ruggedness and reduced thermal margin under sustained industrial operation.

Availability

AT28C010-15JI is available at Aetrix Electronics and suitable for industrial automation, embedded boot memory, and telecom parameter storage requiring stable component supply across extended product lifecycles.

Supply support for AT28C010-15JI 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.

The AT28C010 product line was designed specifically for reliable, pin-compatible replacement of UV-erasable EPROMs in industrial and telecom systems requiring in-system reprogrammability without external high-voltage circuitry.

FAQ

What is the maximum page write size supported by the AT28C010-15JI?

The AT28C010-15JI supports a maximum page write size of 128 bytes per internal programming cycle. This is enabled by its internal 128-byte latching register, which accepts sequential data within a 150 µs window (tBLC) after each byte. All addresses in a given page write must share identical A7–A16 values, defining the 128-byte boundary. The AT28C010-15JI does not support partial-page writes smaller than one byte or cross-page writes.

How does hardware data protection work on the AT28C010-15JI?

Hardware data protection on the AT28C010-15JI comprises four mechanisms: (1) VCC sense circuitry that disables writes when supply drops below ~3.8 V; (2) automatic 5 ms power-on delay before write enable; (3) write inhibition when CE is high, OE is low, or WE is high; and (4) 15 ns noise filtering on WE and CE inputs. These features operate independently of firmware and ensure the AT28C010-15JI remains immune to spurious writes during power ramp-up, brownout, or EMI events.

Can the AT28C010-15JI be used as a direct replacement for a 27C1001 EPROM?

Yes, the AT28C010-15JI is a functional and pin-compatible replacement for the 27C1001 EPROM in most designs. Both use identical JEDEC-standard 32-pin byte-wide pinouts (A0–A16, I/O0–I/O7, CE, OE, WE/VPP), operate from 5V, and support the same address space. However, the AT28C010-15JI requires no UV erasure or 12V VPP programming voltage - it uses internal charge pumps and supports in-system page writes, making it a true drop-in upgrade for legacy EPROM sockets.

What is the purpose of the extra 128 bytes of EEPROM in the AT28C010-15JI?

The AT28C010-15JI includes 128 bytes of dedicated identification memory located at addresses 1FF80H–1FFFFH. These bytes can be read or written by raising A9 to 12V ±0.5V, enabling permanent device serialization, firmware version stamping, or manufacturing traceability without consuming main array space. This feature is fully independent of the primary 128K × 8 memory and retains data for 10 years under industrial conditions - a capability unique to the AT28C010-15JI among standard parallel EEPROMs.

Does the AT28C010-15JI support chip erase, and how is it performed?

Yes, the AT28C010-15JI supports full-chip erase via a 6-byte software command sequence detailed in Atmel's Software Chip Erase application note. Unlike page or byte writes, chip erase clears the entire 128K × 8 memory array to FFh in a single operation. It requires no external high voltage and executes autonomously after command issuance. The AT28C010-15JI does not support sector or block erase - only full-chip or page-level erasure is implemented.