Microchip Technology SST39SF010A-55-4I-WHE-T

Overview

SST39SF010A-55-4I-WHE-T from Microchip Technology is a 1 Mbit (128K × 8) CMOS Multi-Purpose Flash memory IC with 55 ns read access time, single 4.5–5.5 V supply operation, and uniform 4 KB sector-erase architecture. It delivers 100,000 program/erase cycles endurance and >100 years data retention, targeting firmware storage in industrial control panels, legacy embedded BIOS modules, and programmable logic controller (PLC) configuration memory.

For engineers reviewing the SST39SF010A-55-4I-WHE-T datasheet, SST39SF010A-55-4I-WHE-T pinout, SST39SF010A-55-4I-WHE-T application, or SST39SF010A-55-4I-WHE-T equivalent, this page provides verified package mapping (32-lead PLCC), JEDEC-compliant x8 interface timing, SuperFlash technology reliability metrics, and direct alternative part comparisons for drop-in replacement evaluation.

Technical Context

The SST39SF010A-55-4I-WHE-T implements SST's proprietary SuperFlash split-gate cell architecture with thick-oxide tunneling injector, enabling fixed erase/program times independent of cycle count. Its command set follows JEDEC-standard x8 flash pinouts and software protocols-including three-byte unlock sequences for byte-program and six-byte sequences for sector/chip-erase.

It supports TTL-compatible I/O, latched address/data bus operation, and dual end-of-write detection via Data# Polling (DQ7) and Toggle Bit (DQ6). Hardware protection includes noise/glitch immunity (<5 ns pulse rejection), VDD power-up/down detection (<2.5 V inhibit), and write-inhibit mode via OE#, CE#, or WE# control.

Key Specifications

Pinout & Package

Package: 32-lead Plastic Leaded Chip Carrier (PLCC), RoHS compliant, 1.27 mm pitch, 11.43 mm × 13.97 mm body size.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AM29LV010B-55EC and MX29LV160CBTI-55G, the SST39SF010A-55-4I-WHE-T offers native 5 V operation and JEDEC x8 pinout compatibility-enabling zero-layout-change upgrades in legacy 5 V systems where voltage rail consolidation or CFI protocol support is not required.

Availability

SST39SF010A-55-4I-WHE-T is available at Aetrix Electronics and suitable for industrial PLC firmware storage, legacy BIOS configuration memory, and telecom line card bootloader applications requiring stable component supply and long-term obsolescence management.

Supply support for SST39SF010A-55-4I-WHE-T 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 U.S.-based semiconductor company specializing in microcontrollers, analog components, and nonvolatile memory solutions for industrial, automotive, and consumer markets.

The SST39SF010A-55-4I-WHE-T belongs to Microchip's SST39SFx family of Multi-Purpose Flash devices, engineered for cost-sensitive, 5 V embedded systems requiring reliable in-system programmability and long data retention without complex voltage management.

FAQ

What is the maximum operating temperature range for the SST39SF010A-55-4I-WHE-T?

The SST39SF010A-55-4I-WHE-T is rated for industrial temperature operation from -40°C to +85°C, as confirmed in Table 5 of the official Microchip datasheet DS20005022C. This specification applies to all DC and AC characteristics including 55 ns read access time and 100,000-cycle endurance. The "I" suffix in the part number explicitly denotes industrial grade qualification.

Does the SST39SF010A-55-4I-WHE-T require an external VPP programming voltage?

No, the SST39SF010A-55-4I-WHE-T does not require an external VPP voltage. It generates all necessary high-voltage programming and erase potentials internally using on-chip charge pumps, enabled solely by the 4.5–5.5 V VDD supply. This eliminates the need for external high-voltage circuitry and simplifies system design compared to older EPROM or parallel flash devices.

How many address lines does the SST39SF010A-55-4I-WHE-T use, and what is the significance of A16?

The SST39SF010A-55-4I-WHE-T uses 17 address lines (A0–A16), with A16 designated as the Most Significant Address (AMS) per Table 1 and Figures 2–4. This 17-bit address bus fully accesses its 128K × 8 organization (131,072 bytes), and A16 is used during sector-erase commands to select the target 4 KB sector within the memory array.

Can the SST39SF010A-55-4I-WHE-T be used as a direct replacement for the SST39SF010A-70-4C-WHE-T?

Yes, the SST39SF010A-55-4I-WHE-T can replace the SST39SF010A-70-4C-WHE-T in most applications because both share identical functionality, pinout, command set, and voltage specifications. The key differences are the faster 55 ns read timing (vs. 70 ns) and industrial temperature grade (-40°C to +85°C, vs. commercial 0°C to +70°C), making the -55-4I variant a functional and often superior upgrade.

What packaging options are available for the SST39SF010A-55-4I-WHE-T, and which one does this part use?

The SST39SF010A-55-4I-WHE-T is supplied exclusively in the 32-lead Plastic Leaded Chip Carrier (PLCC) package, as indicated by the "WHE" suffix per Microchip's ordering information. While the SST39SF010A family also offers TSOP and PDIP variants, the -WHE-T designation confirms this specific part uses the 32-lead PLCC with gull-wing leads and body size 11.43 mm × 13.97 mm.