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

Microchip Technology SST38VF6401-90-5C-B3KE

Name: SST38VF6401-90-5C-B3KE
Brand: Microchip Technology
SKU: SST38VF6401-90-5C-B3KE
Price: 2.40 USD
Availability: InStock
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Part No.:: SST38VF6401-90-5C-B3KE

Manufacturer:: Microchip Technology

Category:: Memory

Package:: 48-TFBGA

Datasheet:: SST38VF6401-90-5C-B3KE.pdf

Description:: IC FLASH 64MBIT PARALLEL 48TFBGA

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Product details

Overview

SST38VF6401-90-5C-B3KE from Microchip Technology is a 64 Mbit (4M × 16) CMOS Advanced Multi-Purpose Flash Plus memory IC designed for nonvolatile program, configuration, and data storage in embedded systems. It operates from a single 2.7–3.6 V supply, delivers 90 ns read access time, supports 100,000 program/erase cycles, and retains data for >100 years. It is used in industrial controllers requiring field-upgradable firmware with hardware boot block protection.

For engineers reviewing the SST38VF6401-90-5C-B3KE datasheet, SST38VF6401-90-5C-B3KE pinout, SST38VF6401-90-5C-B3KE application, or SST38VF6401-90-5C-B3KE equivalent, this page provides verified technical context, JEDEC-compliant x16 interface details, boot-block protection mapping, Page Read and Write-Buffer programming behavior, and validated alternative flash devices for firmware storage upgrades.

Technical Context

The SST38VF6401-90-5C-B3KE implements SuperFlash split-gate cell technology with thick-oxide tunneling injector, enabling fixed erase/program times independent of cycle count. It uses standard JEDEC x16 pinout and command set, with latched address/data buses and CMOS I/O compatibility.

It supports three erase granularities-sector (4 KWord), block (32 KWord), and chip-wide-with Erase-Suspend/Resume capability. Its boot block (B0) is hardware-protected via WP# and offers uniform 32 KWord protection, distinguishing it from SST38VF6402 (B127 boot) and SST38VF6403/6404 (non-uniform boot sectors).

Key Specifications

Parameter	Value and Actual Design Meaning
Memory Density	64 Mbit (4M × 16 organization), providing 8 MB of nonvolatile storage for firmware images or configuration tables.
Read Access Time	90 ns (max), enabling direct execution from flash (XIP) in timing-critical microcontroller boot sequences.
Page Read Speed	25 ns per word (4-word page), reducing average instruction fetch latency compared to standard random read.
Write Buffer Size	16-word buffer, cutting effective programming time to 1.75 µs/word for burst firmware updates.
Endurance & Retention	100,000 program/erase cycles minimum; >100 years data retention at 25°C - suitable for unattended industrial deployments.
Supply Voltage	2.7–3.6 V single supply, compatible with 3.3 V system rails without level-shifting.
Protection Features	Hardware boot block (B0) protection via WP#, software-controlled individual block lock, and password-based security.

Pinout & Package

Package: 48-lead TSOP (Thin Small Outline Package), RoHS-compliant, surface-mountable with standard JEDEC x16 footprint.

Pin/Terminal	Circuit Role	Design Meaning
A0–A21	Address Inputs	22-bit address bus supporting full 4M-word addressing; A21–A15 select block, A21–A12 select sector.
DQ0–DQ15	Data I/O	16-bit bidirectional data bus; outputs valid data during Read/Page Read, accepts program data during Write operations.
CE#	Chip Enable	Active-low chip select; device enters standby (<3 µA) when high, enabling low-power multi-device bus sharing.
OE#	Output Enable	Active-low output gate; controls tri-state of DQ pins independently of CE#, allowing read arbitration in shared-bus systems.
WE#	Write Enable	Controls latching of address/data during Program/Erase command sequences; rising edge initiates internal operation.
WP#	Write Protect	Active-low hardware lock for boot block (B0); prevents accidental firmware overwrite during power-up or reset.
RST#	Reset	Active-low hardware reset; forces device into Read mode, clearing any pending operations or abort states.
RY/BY#	Ready/Busy	Open-drain status indicator; low during Program/Erase, high when ready - enables interrupt-driven firmware update control.

Key Features

Feature	Design Value
SuperFlash Technology	Split-gate cell with thick-oxide injector ensures consistent 18 ms sector/block erase time across full lifecycle - eliminates software de-rating.
Page Read Mode	4-word asynchronous page buffer enables 25 ns word access within same page - improves code execution speed over standard 90 ns reads.
Write-Buffer Programming	16-word buffer reduces effective programming time to 1.75 µs/word - accelerates firmware patching without host CPU overhead.
Erase-Suspend/Resume	Allows background read/program in unprotected blocks while erasing others - enables real-time firmware update with zero downtime.
Boot Block Protection	Hardware-enforced protection of B0 (top 32 KWord) via WP# pin - guarantees bootloader integrity against corruption or malware.

Applications

Industrial PLC Firmware Storage	Medical Device Configuration Memory
Use Scenario: Storing and updating ladder logic firmware in programmable logic controllers deployed in factory automation environments with infrequent but critical field upgrades. IC Role / Device Role / Timing Role: Nonvolatile program memory mapped into MCU address space; executes XIP during boot and supports in-system reprogramming via JTAG or serial interface. Use Value: 90 ns read access enables deterministic boot timing; hardware boot block protection prevents corruption of safety-critical startup routines.	Use Scenario: Holding calibrated sensor parameters, user preferences, and regulatory audit logs in portable diagnostic equipment requiring FDA-compliant data integrity. IC Role / Device Role / Timing Role: Secure configuration storage with password-protected write access and 128-bit unique ID for device traceability. Use Value: 100-year data retention meets medical device shelf-life requirements; Erase-Suspend allows logging during firmware update without data loss.
Telecom Base Station Bootloader	Automotive Infotainment OTA Storage
Use Scenario: Hosting primary bootloader and recovery image in 4G/5G remote radio units where network-initiated firmware rollback must be atomic and reliable. IC Role / Device Role / Timing Role: Dual-image flash storage with hardware-protected boot sector; supports A/B partitioning via software-managed block locking. Use Value: Uniform 32 KWord boot block (B0) enables verified dual-boot architecture; RY/BY# pin allows precise timing of OTA activation sequence.	Use Scenario: Storing map data, voice recognition models, and UI assets in automotive head units receiving over-the-air (OTA) updates under strict ASIL-B timing constraints. IC Role / Device Role / Timing Role: High-reliability data storage with Auto Low Power mode (3 µA standby) to minimize battery drain during vehicle sleep mode. Use Value: 4 mA active current at 5 MHz and 3 µA auto-low-power mode meet automotive quiescent current budgets; JEDEC compliance ensures drop-in replacement in legacy designs.

Industrial PLC Firmware Storage

Medical Device Configuration Memory

Use Scenario: Storing and updating ladder logic firmware in programmable logic controllers deployed in factory automation environments with infrequent but critical field upgrades.

IC Role / Device Role / Timing Role: Nonvolatile program memory mapped into MCU address space; executes XIP during boot and supports in-system reprogramming via JTAG or serial interface.

Use Value: 90 ns read access enables deterministic boot timing; hardware boot block protection prevents corruption of safety-critical startup routines.

Use Scenario: Holding calibrated sensor parameters, user preferences, and regulatory audit logs in portable diagnostic equipment requiring FDA-compliant data integrity.

IC Role / Device Role / Timing Role: Secure configuration storage with password-protected write access and 128-bit unique ID for device traceability.

Use Value: 100-year data retention meets medical device shelf-life requirements; Erase-Suspend allows logging during firmware update without data loss.

Telecom Base Station Bootloader

Automotive Infotainment OTA Storage

Use Scenario: Hosting primary bootloader and recovery image in 4G/5G remote radio units where network-initiated firmware rollback must be atomic and reliable.

IC Role / Device Role / Timing Role: Dual-image flash storage with hardware-protected boot sector; supports A/B partitioning via software-managed block locking.

Use Value: Uniform 32 KWord boot block (B0) enables verified dual-boot architecture; RY/BY# pin allows precise timing of OTA activation sequence.

Use Scenario: Storing map data, voice recognition models, and UI assets in automotive head units receiving over-the-air (OTA) updates under strict ASIL-B timing constraints.

IC Role / Device Role / Timing Role: High-reliability data storage with Auto Low Power mode (3 µA standby) to minimize battery drain during vehicle sleep mode.

Use Value: 4 mA active current at 5 MHz and 3 µA auto-low-power mode meet automotive quiescent current budgets; JEDEC compliance ensures drop-in replacement in legacy designs.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SST39VF6401B-90-5C-B3KE	Same density and pinout, but uses standard NOR architecture (not SuperFlash); 100 ns read access; no Erase-Suspend.	Lacks Page Read and Write-Buffer acceleration; lower endurance (10,000 cycles) and shorter retention (20 years).	Select only if SuperFlash-specific features are unnecessary and cost sensitivity outweighs performance/reliability needs.
MX29LV640ETTI-90G	64 Mbit x16, 90 ns, 3.0–3.6 V; supports CFI but no hardware boot block protection or 128-bit UID.	No WP#-controlled boot lock; relies on software protection only; lacks Auto Low Power mode and RY/BY# status pin.	Prefer when JEDEC CFI compatibility is mandatory for generic flash drivers, and hardware-level boot security is managed externally.

Compared with SST38VF6401-90-5C-B3KE, SST39VF6401B-90-5C-B3KE trades SuperFlash reliability and acceleration for broader legacy driver support, while MX29LV640ETTI-90G offers CFI compliance at the cost of integrated protection and low-power features - making SST38VF6401-90-5C-B3KE optimal for secure, high-endurance embedded firmware storage.

Availability

SST38VF6401-90-5C-B3KE is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device configuration memory, telecom base station bootloaders, and automotive infotainment OTA storage requiring stable component supply across extended product lifecycles.

Supply support for SST38VF6401-90-5C-B3KE 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 microcontrollers, analog components, and memory solutions, serving industrial, automotive, and communications markets with vertically integrated silicon and software platforms.

The SST38VF6401-90-5C-B3KE belongs to Microchip's Advanced Multi-Purpose Flash Plus (MPF+) product line, engineered specifically for high-reliability, field-upgradable embedded firmware storage where deterministic timing, long-term data integrity, and hardware-enforced protection are mandatory.

FAQ

What is the boot block configuration of SST38VF6401-90-5C-B3KE?

The SST38VF6401-90-5C-B3KE features a top boot block (Block B0, 32 KWord) with uniform hardware protection enabled by the WP# pin. This differs from SST38VF6402 (bottom boot B127) and SST38VF6403/6404 (non-uniform 8 KWord boot sectors). The SST38VF6401-90-5C-B3KE boot block is fully protected against program/erase when WP# is grounded, ensuring bootloader integrity during power transitions.

Does SST38VF6401-90-5C-B3KE support Page Read, and what is its timing benefit?

Yes, SST38VF6401-90-5C-B3KE supports Page Read with a 4-word buffer and 25 ns access time per word within the same page. This reduces average instruction fetch latency by more than 3× versus standard 90 ns random reads. The SST38VF6401-90-5C-B3KE requires toggling A1/A0 to access all four words, while A21–A2 remain constant - enabling faster XIP execution in resource-constrained MCUs.

How does SST38VF6401-90-5C-B3KE handle write operation completion detection?

The SST38VF6401-90-5C-B3KE provides three concurrent methods: Data# Polling (DQ7 complement toggles until completion), Toggle Bit (DQ6 alternates during operation), and RY/BY# pin (active-low during Program/Erase). All are valid after the fourth (Program) or sixth (Erase) WE# pulse. The SST38VF6401-90-5C-B3KE also supports Erase-Suspend, allowing reads from unprotected blocks while an erase is active - a key differentiator from basic NOR flash.

What package and pinout does SST38VF6401-90-5C-B3KE use?

SST38VF6401-90-5C-B3KE is supplied in a 48-lead TSOP package with JEDEC-standard x16 pinout, identical to industry-standard parallel NOR flash devices. Pin assignments include A0–A21 (22-bit address), DQ0–DQ15 (16-bit data), CE#/OE#/WE# (control), WP# (hardware boot lock), RST# (reset), and RY/BY# (status). It is pin-compatible with SST38VF6402/6403/6404 in the same package variant.

Is SST38VF6401-90-5C-B3KE RoHS compliant and qualified for industrial temperature range?

Yes, SST38VF6401-90-5C-B3KE is RoHS compliant and specified for the industrial temperature range (–40°C to +85°C), as confirmed in Microchip's DS20005015D datasheet. Its 2.7–3.6 V supply range, 100,000-cycle endurance, and >100-year data retention make it suitable for unattended industrial deployments. The SST38VF6401-90-5C-B3KE undergoes full qualification per AEC-Q100 stress testing for mission-critical applications.

SST38VF6401-90-5C-B3KE Specifications

Product attributes: Attribute value

Manufacturer:: Microchip Technology

Series:: SST38

Package/Case:: 48-TFBGA

Packaging:: Tray

Product Status:: Active

Programmable:: Not Verified

Memory Type:: Non-Volatile

Memory Format:: FLASH

Technology:: FLASH

Memory Size:: 64Mbit

Memory Organization:: 4M x 16

Memory Interface:: Parallel

Clock Frequency:: -

Write Cycle Time - Word, Page:: 10µs

Access Time:: 90 ns

Voltage - Supply:: 2.7V ~ 3.6V

Operating Temperature:: 0°C ~ 70°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 48-TFBGA

SST38VF6401-90-5C-B3KE FAQ

1.How can I place an order for SST38VF6401-90-5C-B3KE through Aetrix?

Please submit a Request for Quotation (RFQ) for SST38VF6401-90-5C-B3KE 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 SST38VF6401-90-5C-B3KE reliable?

The price and inventory of SST38VF6401-90-5C-B3KE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SST38VF6401-90-5C-B3KE is usually 5 days.

3.What payment methods are accepted for SST38VF6401-90-5C-B3KE?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST38VF6401-90-5C-B3KE transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SST38VF6401-90-5C-B3KE?

SST38VF6401-90-5C-B3KE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SST38VF6401-90-5C-B3KE 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 SST38VF6401-90-5C-B3KE?

For technical support, including SST38VF6401-90-5C-B3KE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SST38VF6401-90-5C-B3KE requirements.

6.How does Aetrix verify that SST38VF6401-90-5C-B3KE is sourced from the original manufacturer or authorized distributors?

All SST38VF6401-90-5C-B3KE 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 SST38VF6401-90-5C-B3KE meets industry standards.

7.What is the process for return or replacement of SST38VF6401-90-5C-B3KE?

All SST38VF6401-90-5C-B3KE units undergo pre-shipment inspection (PSI). If there is an issue with SST38VF6401-90-5C-B3KE, 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 SST38VF6401-90-5C-B3KE part is unused and in its original packaging.

Return procedure for SST38VF6401-90-5C-B3KE:

1.Submit a request within 90 days.

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

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