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Home > Products > Integrated Circuits (ICs) > Memory > Memory

Microchip Technology SST39VF040-70-4I-NHE

Name: SST39VF040-70-4I-NHE
Brand: Microchip Technology
SKU: SST39VF040-70-4I-NHE
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SST39VF040-70-4I-NHE

Manufacturer:: Microchip Technology

Category:: Memory

Package:: 32-LCC (J-Lead)

Datasheet:: SST39VF040-70-4I-NHE.pdf

Description:: IC FLASH 4MBIT PARALLEL 32PLCC

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Product details

Overview

SST39VF040-70-4I-NHE from Microchip Technology is a 4-Mbit (512K × 8) CMOS Multi-Purpose Flash memory IC with 2.7V–3.6V single-supply write operation, 70 ns read access time, and uniform 4-Kbyte sector erase architecture. It delivers 100,000 program/erase cycles endurance and >100-year data retention for embedded firmware storage in industrial control systems.

For engineers reviewing the SST39VF040-70-4I-NHE datasheet, SST39VF040-70-4I-NHE pinout, SST39VF040-70-4I-NHE application, or SST39VF040-70-4I-NHE equivalent, key selection criteria include its 32-pin PLCC/TSOP package compatibility, JEDEC-standard x8 command set, SuperFlash® low-energy erase/program timing, and industrial temperature range (−40°C to +85°C) support.

Technical Context

This device implements Microchip's proprietary SuperFlash® split-gate cell technology with thick-oxide tunneling injector, enabling fixed erase/program times independent of cycle count-unlike conventional flash where timing degrades over endurance life. Its control logic supports both CE#- and WE#-controlled byte programming and sector/chip erase via JEDEC-compliant six-byte software command sequences.

The SST39VF040-70-4I-NHE uses latched address/data bus architecture with tri-state I/Os controlled by CE#, OE#, and WE#. End-of-write detection is implemented via Data# Polling (DQ7) and Toggle Bit (DQ6), allowing host processors to poll asynchronously without dedicated status pins or external timing components.

Key Specifications

Parameter	Value and Actual Design Meaning
Memory Density	4 Mbit (512K × 8) - provides sufficient space for boot code, configuration tables, and field-upgradable firmware in resource-constrained microcontrollers.
Read Access Time	70 ns - enables direct execution from flash (XIP) at up to ~14 MHz system clock without wait states in most 8/16-bit MCU interfaces.
Write Voltage Range	2.7V–3.6V - supports battery-backed or low-voltage industrial systems where 3.0V-only parts (e.g., SST39LF series) cannot operate.
Endurance	100,000 cycles - guarantees reliable firmware updates across 10+ years of field service with daily reprogramming.
Data Retention	>100 years - ensures nonvolatile storage integrity without refresh in unpowered storage or long-term archival applications.
Active Current	5 mA typical at 14 MHz - reduces power budget impact during active read operations in always-on edge devices.
Standby Current	1 µA typical - enables ultra-low-power sleep modes in battery-operated instrumentation and IoT endpoints.

Pinout & Package

32-pin PLCC (Plastic Leaded Chip Carrier) and 32-pin TSOP (Thin Small Outline Package) options; both use identical JEDEC-standard x8 pinout with NC pins mapped per device density (A18 = AMS for SST39VF040).

Pin/Terminal	Circuit Role	Design Meaning
A0–A17	Address Inputs	A0–A17 provide full 512K-byte addressing; A18 is AMS (Most Significant Address) and is NC on this variant per datasheet Note 1.
DQ0–DQ7	Data I/O Bus	Bi-directional 8-bit data path; outputs tri-stated when CE# or OE# is high; latched internally during write cycles.
CE#	Chip Enable	Active-low chip select; device enters standby (1 µA) when high; required low for all read/write operations.
OE#	Output Enable	Active-low output gate; controls data bus drive; must be low with CE# for valid read data.
WE#	Write Enable	Active-low write strobe; initiates byte program, sector erase, and chip erase via timed command sequences.
VDD	Power Supply	2.7V–3.6V supply; powers core logic and SuperFlash® charge pump; internal VPP generation eliminates external high-voltage requirement.
VSS	Ground	Reference return for all signals and power; requires low-impedance connection to minimize noise coupling into sensitive flash array.
NC	No Connection	Pins 1, 6, 9, 29, 30 are NC per SST39VF040 pinout; must remain unconnected to avoid unintended electrical interaction.

Key Features

Feature	Design Value
SuperFlash® Technology	Fixed 18 ms sector erase and 70 ms chip erase times-no derating needed over lifetime, simplifying firmware timing logic and eliminating wear-leveling overhead.
Software Data Protection	JEDEC-standard six-byte command sequence (e.g., 5555H/AAH → 2AAAH/55H → 5555H/80H → …) prevents accidental writes during power transitions or noise events.
Hardware Write Inhibit	Automatic lockout when VDD < 1.5V, or if WE#/CE#/OE# violate setup/hold timing-eliminates need for external reset supervisors in basic designs.
Toggle Bit / Data# Polling	DQ6 toggles during erase/program; DQ7 complements data until completion-enables polling-based status detection without dedicated BUSY pin or interrupt line.
Uniform 4-Kbyte Sectors	128 individually erasable sectors allow granular firmware partitioning (e.g., separate bootloader, app, config sectors) without full-chip erase latency penalties.

Applications

Industrial PLC Firmware Storage	Medical Device Configuration Memory
Use Scenario: Storing and updating ladder logic programs and I/O mapping tables in programmable logic controllers operating in factory-floor environments with wide temperature swings and EMI. IC Role / Device Role / Timing Role: Nonvolatile code storage with in-system reprogrammability; executes directly from flash under MCU control using standard x8 bus interface. Use Value: 70 ns read access enables deterministic scan-cycle timing; −40°C to +85°C rating ensures reliability in unconditioned control cabinets; 100,000-cycle endurance supports decades of field updates.	Use Scenario: Holding calibration coefficients, user preferences, and regulatory audit logs in portable diagnostic equipment requiring traceable, tamper-resistant data storage. IC Role / Device Role / Timing Role: Secure configuration memory with hardware/software write protection; retains critical settings across battery removal and power cycling. Use Value: >100-year data retention meets FDA long-term recordkeeping requirements; 1 µA standby current extends battery life in handheld units; RoHS compliance satisfies global medical directives.
Automotive Body Control Module	Telecom Remote Node Bootloader
Use Scenario: Storing lighting control algorithms and door module firmware in automotive BCMs exposed to thermal cycling and vibration. IC Role / Device Role / Timing Role: Primary firmware repository accessed at power-on reset; supports over-the-air (OTA) update via CAN-triggered reflash routines. Use Value: 2.7V–3.6V operation tolerates automotive battery droop during cranking; SuperFlash® low-energy erase reduces update time and ECU power demand during reprogramming.	Use Scenario: Hosting boot code and network stack initialization routines in cellular base station remote radio units deployed in outdoor enclosures. IC Role / Device Role / Timing Role: First-stage bootloader executed after POR; loads application image from external storage or network into RAM. Use Value: 70 ns access time minimizes boot latency; 4-Kbyte sector granularity allows safe dual-bank OTA updates without bricking the node; industrial temp rating ensures operation in −40°C desert or +85°C rooftop deployments.

Industrial PLC Firmware Storage

Medical Device Configuration Memory

Use Scenario: Storing and updating ladder logic programs and I/O mapping tables in programmable logic controllers operating in factory-floor environments with wide temperature swings and EMI.

IC Role / Device Role / Timing Role: Nonvolatile code storage with in-system reprogrammability; executes directly from flash under MCU control using standard x8 bus interface.

Use Value: 70 ns read access enables deterministic scan-cycle timing; −40°C to +85°C rating ensures reliability in unconditioned control cabinets; 100,000-cycle endurance supports decades of field updates.

Use Scenario: Holding calibration coefficients, user preferences, and regulatory audit logs in portable diagnostic equipment requiring traceable, tamper-resistant data storage.

IC Role / Device Role / Timing Role: Secure configuration memory with hardware/software write protection; retains critical settings across battery removal and power cycling.

Use Value: >100-year data retention meets FDA long-term recordkeeping requirements; 1 µA standby current extends battery life in handheld units; RoHS compliance satisfies global medical directives.

Automotive Body Control Module

Telecom Remote Node Bootloader

Use Scenario: Storing lighting control algorithms and door module firmware in automotive BCMs exposed to thermal cycling and vibration.

IC Role / Device Role / Timing Role: Primary firmware repository accessed at power-on reset; supports over-the-air (OTA) update via CAN-triggered reflash routines.

Use Value: 2.7V–3.6V operation tolerates automotive battery droop during cranking; SuperFlash® low-energy erase reduces update time and ECU power demand during reprogramming.

Use Scenario: Hosting boot code and network stack initialization routines in cellular base station remote radio units deployed in outdoor enclosures.

IC Role / Device Role / Timing Role: First-stage bootloader executed after POR; loads application image from external storage or network into RAM.

Use Value: 70 ns access time minimizes boot latency; 4-Kbyte sector granularity allows safe dual-bank OTA updates without bricking the node; industrial temp rating ensures operation in −40°C desert or +85°C rooftop deployments.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SST39VF040-70-4C-NHE	Commercial temperature grade (0°C to +70°C); otherwise identical electrical and pinout specifications.	Limited to climate-controlled indoor electronics; unsuitable for industrial or automotive under-hood use.	Select SST39VF040-70-4I-NHE for extended temperature operation; choose -4C-NHE only for cost-sensitive consumer-grade designs with ambient thermal constraints.
AT49BV040A-70PU	4-Mbit parallel flash with 70 ns access but requires 3.0V–3.6V supply only; lacks SuperFlash® fixed-timing architecture.	Higher energy consumption during erase/program; timing increases with cycle count, complicating firmware timing margins.	Use AT49BV040A-70PU only if legacy board layout mandates Atmel-compatible timing; SST39VF040-70-4I-NHE offers superior endurance consistency and lower voltage flexibility.

Compared with SST39VF040-70-4C-NHE, the -4I-NHE variant adds guaranteed operation down to −40°C while retaining identical speed, density, and command set; versus AT49BV040A-70PU, it delivers lower power, fixed erase/program timing, and broader voltage tolerance-critical for robust industrial firmware storage.

Availability

SST39VF040-70-4I-NHE is available at Aetrix Electronics and suitable for industrial automation, medical diagnostics, and automotive body control modules requiring stable component supply across extended temperature ranges and multi-year production lifecycles.

Supply support for SST39VF040-70-4I-NHE 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 Inc. is a leading provider of microcontroller, analog, FPGA, and memory solutions, serving industrial, automotive, communications, and consumer markets with vertically integrated silicon and software platforms.

The SST39VF series belongs to Microchip's Multi-Purpose Flash (MPF) product line, designed specifically for embedded systems requiring reliable, low-voltage, in-system programmable nonvolatile memory with JEDEC-standard compatibility and long-term data integrity.

FAQ

What is the maximum operating temperature range for the SST39VF040-70-4I-NHE?

The SST39VF040-70-4I-NHE is rated for industrial temperature operation from −40°C to +85°C. This specification is validated per Microchip's DS20005023E datasheet Table 5-2 and applies to all electrical parameters including read access time, endurance, and standby current. The 'I' suffix explicitly denotes industrial grade, distinguishing it from commercial-grade variants like SST39VF040-70-4C-NHE.

Does the SST39VF040-70-4I-NHE require an external high-voltage supply for programming?

No, the SST39VF040-70-4I-NHE does not require an external high-voltage supply. It features internal VPP generation powered solely by the 2.7V–3.6V VDD rail, enabling single-supply in-system programming. This capability is inherent to Microchip's SuperFlash® technology and is confirmed in the "Automatic Write Timing" feature list and DC characteristics section of the official datasheet.

How many 4-Kbyte sectors does the SST39VF040-70-4I-NHE contain?

The SST39VF040-70-4I-NHE contains 128 uniform 4-Kbyte sectors, totaling 512 Kbytes (4 Mbit). This sector count is derived from the device's 512K × 8 organization and is explicitly stated in the "Sector Erase Capability" feature and Figure 7-15 erase command flowchart, which references sector address (SAx) selection within the A12 address space.

What command sequence initiates a chip erase on the SST39VF040-70-4I-NHE?

A six-byte software command sequence initiates chip erase on the SST39VF040-70-4I-NHE: 5555H/AAH → 2AAAH/55H → 5555H/80H → 5555H/AAH → 2AAAH/55H → 5555H/10H. This sequence is defined in Table 4-2 and Figure 7-15 of the DS20005023E datasheet and requires WE# or CE# control with precise timing per Table 7-2.

Is the SST39VF040-70-4I-NHE pin-compatible with the SST39LF040 series?

Yes, the SST39VF040-70-4I-NHE is JEDEC-standard pin-compatible with the SST39LF040 series, sharing identical 32-pin PLCC/TSOP footprints and x8 signal assignments (A0–A17, DQ0–DQ7, CE#, OE#, WE#, VDD, VSS). However, voltage ranges differ: SST39VF040 operates at 2.7V–3.6V, while SST39LF040 requires 3.0V–3.6V-direct substitution requires verification of system supply compliance.

SST39VF040-70-4I-NHE Specifications

Product attributes: Attribute value

Manufacturer:: Microchip Technology

Series:: SST39 MPF™

Package/Case:: 32-LCC (J-Lead)

Packaging:: Tube

Product Status:: Active

Programmable:: Verified

Memory Type:: Non-Volatile

Memory Format:: FLASH

Technology:: FLASH

Memory Size:: 4Mbit

Memory Organization:: 512K x 8

Memory Interface:: Parallel

Clock Frequency:: -

Write Cycle Time - Word, Page:: 20µs

Access Time:: 70 ns

Voltage - Supply:: 2.7V ~ 3.6V

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 32-PLCC (11.43x13.97)

SST39VF040-70-4I-NHE FAQ

1.How can I place an order for SST39VF040-70-4I-NHE through Aetrix?

Please submit a Request for Quotation (RFQ) for SST39VF040-70-4I-NHE on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for SST39VF040-70-4I-NHE reliable?

The price and inventory of SST39VF040-70-4I-NHE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SST39VF040-70-4I-NHE is usually 5 days.

3.What payment methods are accepted for SST39VF040-70-4I-NHE?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST39VF040-70-4I-NHE transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SST39VF040-70-4I-NHE?

SST39VF040-70-4I-NHE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SST39VF040-70-4I-NHE order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for SST39VF040-70-4I-NHE?

For technical support, including SST39VF040-70-4I-NHE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SST39VF040-70-4I-NHE requirements.

6.How does Aetrix verify that SST39VF040-70-4I-NHE is sourced from the original manufacturer or authorized distributors?

All SST39VF040-70-4I-NHE products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SST39VF040-70-4I-NHE meets industry standards.

7.What is the process for return or replacement of SST39VF040-70-4I-NHE?

All SST39VF040-70-4I-NHE units undergo pre-shipment inspection (PSI). If there is an issue with SST39VF040-70-4I-NHE, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The SST39VF040-70-4I-NHE part is unused and in its original packaging.

Return procedure for SST39VF040-70-4I-NHE:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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