Microchip Technology SST39SF010A-55-4C-WHE

Overview

SST39SF010A-55-4C-WHE 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 JEDEC-standard x8 parallel interface. It features uniform 4 KB sector erase, 100,000 write/erase endurance, and >100 years data retention - deployed in embedded firmware storage for industrial controllers and legacy BIOS modules.

For engineers reviewing the SST39SF010A-55-4C-WHE datasheet, SST39SF010A-55-4C-WHE pinout, SST39SF010A-55-4C-WHE application, or SST39SF010A-55-4C-WHE equivalent, key selection criteria include 32-pin PLCC package compatibility, TTL I/O voltage levels, software data protection command sequence compliance, and 55 ns timing validation for 14 MHz bus interfaces.

Technical Context

This device implements SST's proprietary SuperFlash technology with split-gate cell architecture and thick-oxide tunneling injector, enabling fixed erase/program times independent of cycle count. It uses standard microprocessor write sequences to execute Byte-Program, Sector-Erase (six-byte command), and Chip-Erase (six-byte command) operations via CE#/WE#/OE# control logic.

Operation relies on latched address/data buses, toggle-bit (DQ6) and data# polling (DQ7) for end-of-write detection, and hardware protections including noise/glitch immunity (<5 ns pulse rejection), VDD power-up/down detection (<2.5 V inhibit), and write-inhibit mode via OE# low or CE# high.

Key Specifications

Pinout & Package

Package: 32-lead PLCC (Plastic Leaded Chip Carrier), body size 13.1 mm × 13.1 mm, lead pitch 1.27 mm, RoHS compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar parallel NOR flash memory applications.

Compared with AT29LV010A-15JI and MX29LV010CTC-70G, the SST39SF010A-55-4C-WHE provides faster 55 ns read timing, native 5 V operation without level shifters, and integrated VPP generation - making it the sole choice for direct replacement of 27C010 EPROMs in existing 5 V industrial and computing platforms.

Availability

SST39SF010A-55-4C-WHE is available at Aetrix Electronics and suitable for industrial PLC firmware storage, legacy PC BIOS upgrades, medical device configuration, and telecom bootloader applications requiring stable component supply and long-term obsolescence management.

Supply support for SST39SF010A-55-4C-WHE 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 global semiconductor company specializing in microcontrollers, analog devices, and nonvolatile memory solutions, with a focus on embedded control and connectivity.

The SST39SF010A-55-4C-WHE belongs to Microchip's legacy SuperFlash parallel NOR flash product line, designed specifically for cost-sensitive, high-reliability firmware and configuration storage in 5 V industrial and computing systems.

FAQ

What is the maximum operating frequency supported by SST39SF010A-55-4C-WHE?

The SST39SF010A-55-4C-WHE does not specify a maximum clock frequency because it is an asynchronous parallel NOR flash. Its 55 ns read access time supports reliable operation on 14 MHz system buses (TRC = 55 ns). For higher-speed interfaces, external wait-state logic may be required. The SST39SF010A-55-4C-WHE datasheet confirms timing compliance under JEDEC AC test conditions with CL = 30 pF.

Does SST39SF010A-55-4C-WHE require an external VPP voltage for programming?

No, the SST39SF010A-55-4C-WHE integrates an internal charge pump and generates all necessary high-voltage programming signals from its single 4.5–5.5 V VDD supply. This eliminates the need for external VPP circuitry, simplifying design and reducing bill-of-materials cost compared to older EPROM or early flash devices. The SST39SF010A-55-4C-WHE achieves this using SST's SuperFlash technology.

How many address lines does SST39SF010A-55-4C-WHE use?

The SST39SF010A-55-4C-WHE uses 17 address lines (A0–A16) to access its full 128K × 8 memory array. A16 is the most significant address bit for this 1 Mbit variant. Pin assignments confirm A0–A16 are dedicated address inputs in the 32-lead PLCC package, with no multiplexed address/data bus - consistent with JEDEC-standard x8 parallel flash architecture.

Is SST39SF010A-55-4C-WHE RoHS compliant?

Yes, the SST39SF010A-55-4C-WHE is RoHS compliant, as explicitly stated in the official Microchip datasheet (DS20005022C, page 2). It meets EU Directive 2011/65/EU requirements for restriction of hazardous substances, including lead-free terminations and halogen-free molding compound. This compliance applies to all package variants, including the PLCC version designated by the "WHE" suffix.

What is the purpose of the NC pins on SST39SF010A-55-4C-WHE?

The SST39SF010A-55-4C-WHE has three NC (No Connection) pins: Pin 12, Pin 24, and Pin 31 in the 32-lead PLCC package. These pins are physically present but not bonded to the die - they must remain unconnected and floating in the PCB layout. Connecting them to VDD, VSS, or signals may cause undefined behavior or damage. The SST39SF010A-55-4C-WHE datasheet confirms these pins serve no electrical function and are reserved for future family expansion.