Microchip Technology AT29C512-15PI

Overview

AT29C512-15PI from Atmel is a 512 Kbit (64K × 8) in-system programmable Flash memory IC operating on single 5V ±10% supply, featuring 150 ns read access time, sector-based reprogramming (512 sectors × 128 bytes), and hardware/software data protection - used in industrial firmware storage and embedded boot code retention.

For engineers reviewing the AT29C512-15PI datasheet, AT29C512-15PI pinout, AT29C512-15PI application, or AT29C512-15PI equivalent, key selection considerations include industrial temperature range (-40°C to +85°C), PLCC-32 package compatibility, sector erase granularity, DATA polling/Toggle Bit program status detection, and 5V-only reprogrammability without high-voltage programming signals.

Technical Context

The AT29C512-15PI implements a sector-program architecture where each 128-byte sector is erased and programmed in a single internal cycle using an embedded control timer; address latching (A0–A15) and data latching (I/O0–I/O7) occur during byte load phases prior to automatic erase-and-program execution.

It supports dual-line chip enable (CE) and output enable (OE) for bus contention avoidance during read operations, and integrates both hardware-level VCC sensing (inhibit below 3.8V) and software-controlled data protection via three-byte command sequences (AA/55/A0 for enable; AA/55/80/AA/55/20 for disable) verified at power-on and across voltage transitions.

Key Specifications

Pinout & Package

AT29C512-15PI is packaged in a 32-lead Plastic J-Leaded Chip Carrier (PLCC-32), compliant with JEDEC MS-016 Variation AE, with lead coplanarity ≤0.102 mm and body dimensions 12.57 mm × 15.11 mm × 3.56 mm (L×W×H).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar Flash memory applications.

Compared with MX29LV512CTTI-15G and AM29LV512-15EI, the AT29C512-15PI uniquely combines true 5V-only operation, integrated VCC-sense write inhibition, and Atmel's sector-program algorithm - making it optimal for legacy 5V industrial designs where voltage stability and programming robustness are critical.

Availability

AT29C512-15PI is available at Aetrix Electronics and suitable for industrial automation, medical instrumentation, and automotive body electronics requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for AT29C512-15PI 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 embedded systems.

The AT29C512 product line was designed for in-system reprogrammable firmware storage in 5V microcontroller-based applications where high endurance, sector-level granularity, and robust data protection were essential - targeting industrial, medical, and telecom infrastructure markets.

FAQ

What is the maximum operating temperature range for the AT29C512-15PI?

The AT29C512-15PI is rated for industrial temperature operation from -40°C to +85°C. This specification is confirmed in the Ordering Information table (page 14) and DC Operating Range section (page 5), where "Ind." denotes industrial grade. The device maintains full functionality-including 150 ns read access, 10 ms sector programming, and hardware data protection-across this full range. It is not rated for extended temperature or automotive AEC-Q100 qualification.

Does the AT29C512-15PI require high-voltage programming signals?

No, the AT29C512-15PI does not require high-voltage programming signals. As stated in the Features and Description sections, it supports "5-volt Only Reprogramming" with all commands executed using standard 5V logic levels. Programming is initiated via WE/CE-controlled byte loads and internally managed erase-and-program cycles. No external 12V or 12.5V supplies are needed - unlike older EPROM or EEPROM devices - simplifying system design and eliminating HV charge pump circuitry.

How many sectors does the AT29C512-15PI have, and what is the size of each sector?

The AT29C512-15PI contains 512 sectors, each 128 bytes in size. This is explicitly stated in the Features list ("512 Sectors (128 Bytes/Sector)") and reinforced in the Device Operation section, which specifies that A7–A15 select the sector address and A0–A6 select the byte within the sector. Total memory capacity is therefore 512 × 128 = 65,536 bytes (64K × 8), matching the 512 Kbit density.

What package type is used for the AT29C512-15PI, and how is it identified in the ordering code?

The AT29C512-15PI uses a 32-lead Plastic J-Leaded Chip Carrier (PLCC) package, designated as "32J" in Atmel's packaging nomenclature. This is confirmed in the Ordering Information table (page 14), where "AT29C512-15PI" maps to package "32J", and in the Packaging Information section (page 15), which provides mechanical drawings and JEDEC compliance details (MS-016, Variation AE). The "PI" suffix specifically denotes PLCC-32 with industrial temperature range.

How does the AT29C512-15PI indicate completion of a sector programming cycle?

The AT29C512-15PI provides two hardware-supported methods: DATA polling and Toggle Bit detection. During programming, reading the last loaded byte returns the complement on I/O7 (DATA polling); when complete, true data appears. Alternatively, I/O6 toggles between 0 and 1 during programming and stops toggling upon completion. Both mechanisms are detailed in Sections 4 and 5 of the datasheet and require no external timing components - enabling reliable, interrupt-driven or polled firmware update routines in the AT29C512-15PI host system.