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Microchip Technology SST39VF402C-70-4I-B3KE
- Part No.:
- SST39VF402C-70-4I-B3KE
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 48-TFBGA
- Datasheet:
-
SST39VF402C-70-4I-B3KE.pdf
- Description:
- IC FLASH 4MBIT PARALLEL 48TFBGA
- Quantity:
- Payment:
- Shipping:
Inventory:3,022
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Product details
Overview
SST39VF402C-70-4I-B3KE from Microchip Technology is a 4 Mbit (256K × 16) CMOS Multi-Purpose Flash Plus memory IC with SuperFlash® technology, designed for embedded program/data storage in microcontroller-based systems. It operates at 2.7–3.6V, delivers 70 ns read access time, supports hardware block protection on the top 8 KWord boot sector, and features erase-suspend/resume capability for real-time firmware updates.
For engineers reviewing the SST39VF402C-70-4I-B3KE datasheet, SST39VF402C-70-4I-B3KE pinout, SST39VF402C-70-4I-B3KE application, or SST39VF402C-70-4I-B3KE equivalent, this page provides verified technical context, JEDEC-compliant x16 interface behavior, boot-block protection mapping, SuperFlash endurance/reliability data, and validated alternative flash parts for industrial firmware storage designs.
Technical Context
This device implements a split-gate SuperFlash® cell architecture with thick-oxide tunneling injector, enabling fixed 7 µs word-program and 18 ms sector/block-erase times independent of cycle count. It uses standard JEDEC x16 flash command sets-including six-byte sequences for sector/block/chip erase-and supports both software data protection (SDP) and hardware write protection via WP#.
The SST39VF402C-70-4I-B3KE integrates RY/BY# open-drain status signaling, DQ6/DQ7 toggle-bit and data-polling detection, and Auto Low Power mode (3 µA standby), all synchronized to CE#/WE#/OE# control timing. Its top-boot block spans address 3E000H–3FFFFH and is protected when WP# is low, distinguishing it from bottom-boot SST39VF401C variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 4 Mbit (256K × 16 organization), directly maps to 512 KB of 16-bit wide storage space |
| Read Access Time | 70 ns maximum - enables direct interface with 14 MHz bus clocks without wait states |
| Supply Voltage | 2.7–3.6V - supports single-supply operation across wide industrial voltage rails |
| Endurance | 100,000 program/erase cycles - guarantees firmware update longevity in field-deployed devices |
| Data Retention | Greater than 100 years - ensures nonvolatile storage integrity over full product lifecycle |
| Word-Program Time | 7 µs typical - reduces firmware patch latency and improves system responsiveness |
| Sector-Erase Time | 18 ms typical - uniform 2 KWord sectors enable fine-grained, deterministic update partitioning |
Pinout & Package
Package: 48-ball WFBGA (4 mm × 6 mm, 0.5 mm pitch), RoHS-compliant, optimized for high-density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | 18-bit address bus; AMS = A17 selects top/bottom boot blocks during erase operations |
| DQ0–DQ15 | Data I/O | 16-bit bidirectional bus with latched inputs and tri-state outputs controlled by OE#/CE# |
| CE# | Chip Enable | Active-low chip select; device enters standby (3 µA) when high |
| OE# | Output Enable | Active-low output gate; controls data bus tristate independently of CE# |
| WE# | Write Enable | Active-low control for program/erase command latching and internal timing initiation |
| WP# | Hardware Write Protect | Low = locks top 8 KWord boot block (3E000H–3FFFFH); floating = internally pulled high |
| RST# | Hardware Reset | Active-low reset; forces immediate return to read mode, aborting in-progress operations |
| RY/BY# | Ready/Busy# | Open-drain status output requiring external 10–100 kΩ pull-up; low = active erase/program |
| VDD | Power Supply | 2.7–3.6V supply; powers core logic, charge pump, and I/O buffers |
| VSS | Ground | Primary reference for all digital and analog circuitry |
Key Features
| Feature | Design Value |
|---|---|
| Erase-Suspend/Resume | Enables real-time reading or programming in non-suspended sectors during active erase, critical for fail-safe OTA updates |
| Top Boot Block Protection | Hardware-enforced lock on top 8 KWord (3E000H–3FFFFH) prevents accidental overwrite of bootloader code |
| Security ID Space | Factory-programmed 128-bit ID + 128-word user-programmable segment, supporting secure device authentication |
| Auto Low Power Mode | Reduces active read current from 5 mA to 3 µA after valid access, cutting dynamic power in burst-read applications |
| SuperFlash® Reliability | Split-gate cell design ensures stable 70 ns access and fixed 7 µs program time across full 100k-cycle lifetime |
Applications
| Industrial PLC Firmware Storage | Medical Device Configuration Memory |
|---|---|
Use Scenario: Storing and updating ladder logic firmware in programmable logic controllers operating in harsh factory environments. IC Role / Device Role / Timing Role: Nonvolatile program memory interfaced directly to ARM Cortex-M4 MCU's external bus, providing 16-bit parallel access. Use Value: Top-boot protection prevents corruption of safety-critical bootloader during field firmware upgrades; 100-year retention ensures calibration data integrity over equipment lifetime. |
Use Scenario: Holding calibrated sensor offsets, patient-specific therapy parameters, and regulatory audit logs in portable diagnostic instruments. IC Role / Device Role / Timing Role: Secure configuration store with Security ID authentication, accessed via SPI-to-parallel bridge during boot initialization. Use Value: Erase-suspend allows background parameter validation while preserving active treatment session data; RY/BY# enables deterministic interrupt-driven status polling. |
| Automotive Infotainment Bootloader | Networking Equipment Image Storage |
Use Scenario: Hosting dual-image bootloader in automotive head units requiring A/B firmware rollback capability. IC Role / Device Role / Timing Role: Primary boot memory mapped to MCU's XIP (execute-in-place) address space, with top 8 KWord reserved for primary bootloader. Use Value: 70 ns access enables zero-wait-state execution; hardware WP# eliminates need for software lock management during cold boot recovery sequences. |
Use Scenario: Storing multiple firmware images (base OS, feature packs, security patches) in enterprise switches and routers. IC Role / Device Role / Timing Role: Parallel-connected flash bank managed by dedicated memory controller for concurrent image verification and load. Use Value: Uniform 2 KWord sectors allow atomic patch application without disrupting active network services; CFI query support enables automatic part identification in multi-vendor BOMs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SST39VF402C-70-4C-B3KE | Same die, commercial temperature range (0°C to +70°C) vs. industrial (-40°C to +85°C) | Lacks extended thermal qualification for outdoor or under-hood deployment | Select only for cost-sensitive, ambient-controlled indoor applications |
| MX29LV400CTTI-70G | 4 Mbit x16 CFI-compliant flash; 70 ns access but no erase-suspend, no Security ID, different block architecture (64 KWord sectors) | Requires firmware redesign to accommodate larger erase granularity and absence of suspend capability | Use where legacy compatibility with Macronix toolchains is required and suspend functionality is not needed |
Compared with SST39VF402C-70-4I-B3KE, the SST39VF402C-70-4C-B3KE offers identical electrical and functional behavior but lacks industrial temperature certification, while MX29LV400CTTI-70G requires changes to erase scheduling and security implementation due to missing SuperFlash® features.
Availability
SST39VF402C-70-4I-B3KE is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device configuration memory, automotive infotainment bootloader, networking equipment image storage, and embedded system BIOS/UEFI storage requiring stable component supply across long production lifecycles.
Supply support for SST39VF402C-70-4I-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 is a global semiconductor company specializing in microcontrollers, analog components, and nonvolatile memory solutions, with emphasis on reliability and long-term product support.
The SST39VF402C-70-4I-B3KE belongs to Microchip's Multi-Purpose Flash Plus (MPF+) family, engineered specifically for robust, low-power, high-endurance embedded firmware and configuration storage in industrial, automotive, and medical applications.
FAQ
What is the exact memory organization of the SST39VF402C-70-4I-B3KE?
The SST39VF402C-70-4I-B3KE is organized as 256K × 16, delivering 4 Mbit (512 KB) of storage in a 16-bit parallel interface configuration. This structure supports direct connection to 16-bit microcontroller buses without data-width translation, and its address space spans 00000H–3FFFFH, with the top boot block occupying 3E000H–3FFFFH.
How does hardware block protection work on the SST39VF402C-70-4I-B3KE?
Hardware block protection on the SST39VF402C-70-4I-B3KE is implemented via the WP# pin: when grounded, it permanently locks the top 8 KWord boot sector (3E000H–3FFFFH) against program and erase operations. If WP# is left floating, an internal pull-up holds it high, disabling protection. This mechanism is independent of software commands and active immediately on power-up.
Does the SST39VF402C-70-4I-B3KE support erase-suspend functionality?
Yes, the SST39VF402C-70-4I-B3KE supports full erase-suspend and erase-resume operations using the B0H and 30H command codes. This allows host firmware to temporarily halt an ongoing sector or block erase, read data from any non-suspended location, or program other unprotected sectors-enabling safe, real-time firmware updates without halting system operation.
What package type is used for the SST39VF402C-70-4I-B3KE?
The SST39VF402C-70-4I-B3KE is packaged in a 48-ball WFBGA (4 mm × 6 mm, 0.5 mm pitch), designated by the "B3KE" suffix. This ultra-compact, RoHS-compliant package supports high-density PCB layouts and thermal performance requirements for industrial and automotive applications, and is distinct from the TSOP and TFBGA variants in the same family.
What is the role of the RY/BY# pin on the SST39VF402C-70-4I-B3KE?
The RY/BY# pin on the SST39VF402C-70-4I-B3KE is an open-drain ready/busy status indicator. When driven low, it signals that a program or erase operation is actively executing; when high (via external 10–100 kΩ pull-up), it confirms readiness for the next command. This pin enables hardware-interrupt-driven operation and eliminates the need for continuous software polling of DQ6/DQ7.
SST39VF402C-70-4I-B3KE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- SST39 MPF™
- Package/Case:
- 48-TFBGA
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- FLASH
- Technology:
- FLASH
- Memory Size:
- 4Mbit
- Memory Organization:
- 256K x 16
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 10µs
- 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:
- 48-TFBGA (6x8)
SST39VF402C-70-4I-B3KE FAQ
1.How can I place an order for SST39VF402C-70-4I-B3KE through Aetrix?
Please submit a Request for Quotation (RFQ) for SST39VF402C-70-4I-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 SST39VF402C-70-4I-B3KE reliable?
The price and inventory of SST39VF402C-70-4I-B3KE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SST39VF402C-70-4I-B3KE is usually 5 days.
3.What payment methods are accepted for SST39VF402C-70-4I-B3KE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST39VF402C-70-4I-B3KE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST39VF402C-70-4I-B3KE?
SST39VF402C-70-4I-B3KE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST39VF402C-70-4I-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 SST39VF402C-70-4I-B3KE?
For technical support, including SST39VF402C-70-4I-B3KE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SST39VF402C-70-4I-B3KE requirements.
6.How does Aetrix verify that SST39VF402C-70-4I-B3KE is sourced from the original manufacturer or authorized distributors?
All SST39VF402C-70-4I-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 SST39VF402C-70-4I-B3KE meets industry standards.
7.What is the process for return or replacement of SST39VF402C-70-4I-B3KE?
All SST39VF402C-70-4I-B3KE units undergo pre-shipment inspection (PSI). If there is an issue with SST39VF402C-70-4I-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 SST39VF402C-70-4I-B3KE part is unused and in its original packaging.
Return procedure for SST39VF402C-70-4I-B3KE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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