Microchip Technology SST39VF512-70-4I-WHE-T

Overview

SST39VF512-70-4I-WHE-T from Microchip Technology (formerly Silicon Storage Technology) is a 4 Mbit (512K × 8) CMOS Multi-Purpose Flash memory IC with JEDEC-standard x8 parallel interface, 2.7–3.6 V single-supply operation, 70 ns read access time, and uniform 4 KB sector-erase architecture. It serves as nonvolatile program/data storage in embedded microcontroller systems requiring field-upgradable firmware.

For engineers reviewing the SST39VF512-70-4I-WHE-T datasheet, SST39VF512-70-4I-WHE-T pinout, SST39VF512-70-4I-WHE-T application, or SST39VF512-70-4I-WHE-T equivalent, key selection criteria include industrial temperature support (−40°C to +85°C), hardware/software data protection, SuperFlash® endurance (100,000 cycles), and compatibility with standard 32-pin TSOP-I (8 mm × 14 mm) PCB footprints.

Technical Context

The SST39VF512-70-4I-WHE-T implements SST's proprietary SuperFlash® technology with split-gate cell design and thick-oxide tunneling injector, enabling fixed erase/program timing independent of cycle count. It supports Byte-Program (14 µs typical), Sector-Erase (18 ms typical), and Chip-Erase (70 ms typical) operations via JEDEC-standard command sequences.

Operation relies on three control signals - CE#, OE#, and WE# - with CMOS-compatible I/O levels, latched address/data bus, and dual end-of-write detection (Data# Polling on DQ7 and Toggle Bit on DQ6). The device conforms to JEDEC pinouts for x8 memories and supports both WE#- and CE#-controlled write timing.

Key Specifications

Pinout & Package

32-lead TSOP-I (8 mm × 14 mm) package with standard JEDEC x8 parallel flash pinout. Pin functions align with industry-wide memory controller interfaces.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MX29LV400CTTI-70G and EN29LV400AB-70TP, the SST39VF512-70-4I-WHE-T uniquely combines industrial temperature range, 10× higher endurance, and SuperFlash® fixed-timing - making it optimal for mission-critical embedded systems requiring long-term field upgradability.

Availability

SST39VF512-70-4I-WHE-T is available at Aetrix Electronics and suitable for industrial PLCs, medical diagnostics, networking bootloaders, and automotive body control modules requiring stable component supply and long-term lifecycle support.

Supply support for SST39VF512-70-4I-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 acquired Silicon Storage Technology (SST) in 2016 and continues to manufacture and support the SuperFlash® family of parallel and serial NOR flash devices.

The SST39VF series belongs to Microchip's legacy parallel NOR flash product line, designed specifically for cost-sensitive, high-reliability embedded applications requiring simple x8 bus interfacing and robust in-system programmability.

FAQ

What is the exact memory organization of the SST39VF512-70-4I-WHE-T?

The SST39VF512-70-4I-WHE-T is organized as 512K words × 8 bits (4 Mbit total), with 64 uniform 4 KB sectors. Its address range spans A0–A18, where A18 serves as the most significant address (AMS) for sector selection during erase operations. This structure is explicitly confirmed in the DS25023B datasheet section "Product Description" and Table 1 (Pin Description).

Does the SST39VF512-70-4I-WHE-T support both WE#- and CE#-controlled write operations?

Yes, the SST39VF512-70-4I-WHE-T supports both WE#- and CE#-controlled write timing for Byte-Program, Sector-Erase, and Chip-Erase commands. Figures 5 and 6 in the DS25023B datasheet show identical timing waveforms for both control methods, and the text states: "The WE# and CE# signals are interchangeable as long as minimum timings are met." This dual-control flexibility simplifies integration with diverse memory controller designs.

What is the guaranteed minimum endurance and data retention for the SST39VF512-70-4I-WHE-T?

The SST39VF512-70-4I-WHE-T is guaranteed for 100,000 program/erase cycles and greater than 100 years of data retention under specified operating conditions. These values are stated in the "Features" section and verified in Table 11 (Reliability Characteristics) of DS25023B, which cites JEDEC Standard A117 for endurance and A103 for retention - both tested and qualified across the industrial temperature range.

How does the SST39VF512-70-4I-WHE-T implement write protection?

The SST39VF512-70-4I-WHE-T implements dual-layer write protection: hardware-level inhibition (noise/glitch filtering, VDD power-up detection, and Write Inhibit Mode) plus software-level JEDEC-compliant command locking. All Program operations require a 3-byte sequence (5555H/AAH → 2AAAH/55H → 5555H/A0H); Erase operations require a 6-byte sequence. The device ships with Software Data Protection permanently enabled, as documented in the "Data Protection" section of DS25023B.

Is the SST39VF512-70-4I-WHE-T pin-compatible with other devices in the SST39VF family?

Yes, the SST39VF512-70-4I-WHE-T shares identical 32-pin TSOP-I pinout and signal definitions with SST39VF010-70, SST39VF020-70, and SST39VF040-70, as confirmed in Figure 3 and Table 1 of DS25023B. Address line mapping differs (e.g., AMS = A18 for SST39VF512 vs. A16 for SST39VF010), but physical pin functions (CE#, OE#, WE#, DQ0–DQ7, etc.) and package dimensions are fully compatible - enabling drop-in replacement within same-density variants.