Microchip Technology AT29C010A-90JU

Overview

AT29C010A-90JU from Atmel is a 1-megabit (128K × 8) 5-volt-only Flash memory IC organized as 131,072 words × 8 bits, featuring 70 ns read access time, 10 ms sector program cycle time, and 10,000 write/erase endurance cycles. It supports in-system reprogramming via sector-based architecture with 1024 sectors of 128 bytes each, and includes hardware/software data protection for industrial embedded firmware storage applications.

For engineers reviewing the AT29C010A-90JU datasheet, AT29C010A-90JU pinout, AT29C010A-90JU application, or AT29C010A-90JU equivalent, key selection considerations include its 90 ns AC timing specification, PLCC-32 package, dual 8K boot block lockout, DATA polling and toggle bit programming status detection, and compatibility with standard EPROM read interfaces.

Technical Context

The AT29C010A-90JU implements a sector-erase-and-program architecture where 128-byte sectors are internally latched before simultaneous programming, freeing the address/data bus during t_WC = 10 ms internal cycle. Its control logic responds to CE/OE/WE combinations per JEDEC-compliant Flash operation modes, including hardware product identification (A9 = 12 V) and software entry via 3-byte command sequences at 5555H/2AAAH.

It integrates dual independent 8K-byte boot blocks with programmable lockout-activated by a 7-command sequence-and supports both hardware V_CC sense (inhibit below 3.8 V) and noise filtering (<15 ns pulse rejection on WE/CE). DATA polling on I/O7 and toggle bit monitoring on I/O6 provide deterministic end-of-program detection without external timers.

Key Specifications

Pinout & Package

AT29C010A-90JU is packaged in a 32-lead Plastic J-Leaded Chip Carrier (PLCC-32), compliant with JEDEC MS-016 Variation AE, with 1.27 mm pitch, 12.45 mm × 14.95 mm body, and 3.35 mm max height. Pin 1 identifier is a corner notch.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AM29LV010B-90JC and MX29LV160ETTI-90G, the AT29C010A-90JU offers true 5 V-only operation and PLCC-32 packaging ideal for retrofitting legacy industrial controllers, whereas alternatives require voltage translation or PCB redesign despite similar timing performance.

Availability

AT29C010A-90JU is available at Aetrix Electronics and suitable for industrial PLC firmware storage, legacy embedded system bootloaders, and automotive diagnostic tool memory requiring stable component supply and long-term lifecycle support.

Supply support for AT29C010A-90JU 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, Flash memory, and wireless solutions for industrial, automotive, and consumer applications.

The AT29C010A belongs to Atmel's 5-volt Flash memory product line, designed specifically for in-system reprogrammability in legacy 5 V embedded systems where simplicity, reliability, and EPROM-like interface compatibility are critical.

FAQ

What is the maximum operating temperature range for the AT29C010A-90JU?

The AT29C010A-90JU is rated for industrial temperature operation from -40°C to +85°C. This range is confirmed in the "DC and AC Operating Range" section of the datasheet, where it specifies that the -90 speed grade supports this full industrial range under 5 V ±10% supply conditions. The PLCC-32 package construction and Atmel's CMOS process ensure stable parametric performance across this interval without derating.

Does the AT29C010A-90JU require a high-voltage programming signal?

No, the AT29C010A-90JU does not require high-voltage programming. It operates with single 5 V ±10% supply for both read and program functions. Programming is initiated using standard logic-level WE and CE signals, with internal charge pumps generating necessary voltages. This eliminates the need for external 12 V sources or level shifters, distinguishing it from older EPROMs and some competing Flash devices like the AM29LV010B.

How is programming completion detected on the AT29C010A-90JU?

Programming completion on the AT29C010A-90JU is detected using either DATA polling on I/O7 or the toggle bit on I/O6. During programming, reading the last loaded byte returns the complement of the data on I/O7; when complete, true data appears. Alternatively, I/O6 toggles between 0 and 1 until completion, then stabilizes. Both methods are fully documented in Sections 4.7 and 4.8 of the AT29C010A-90JU datasheet and require no external hardware.

Can the boot blocks of the AT29C010A-90JU be independently locked?

Yes, the AT29C010A-90JU features two independent 8K-byte boot blocks - one at the lowest addresses (0x0000–0x1FFF) and one at the highest (0x1E000–0x1FFFF) - each with separately activatable programming lockout. Activation requires a unique 7-command sequence per block, and once enabled, neither block can be erased or programmed, though remaining memory remains fully writable. This is detailed in Section 4.10 and Figure 27 of the AT29C010A-90JU datasheet.

What package type is used for the AT29C010A-90JU?

The AT29C010A-90JU uses a 32-lead Plastic J-Leaded Chip Carrier (PLCC-32) package, identified by the "JU" suffix in the ordering code. Its mechanical dimensions conform to JEDEC MS-016 Variation AE, with 1.27 mm lead pitch, 12.45 mm × 14.95 mm body size, and pin 1 marked by a corner notch. This package is socket-compatible with standard PLCC-32 sockets used in industrial programming and test fixtures.