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Microchip Technology SST39VF402C-70-4I-EKE
- Part No.:
- SST39VF402C-70-4I-EKE
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 48-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
SST39VF402C-70-4I-EKE.pdf
- Description:
- IC FLASH 4MBIT PARALLEL 48TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,233
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Product details
Overview
SST39VF402C-70-4I-EKE from Microchip is a 4 Mbit (256K × 16) Multi-Purpose Flash Plus (MPF+) memory IC operating at 2.7–3.6 V, featuring 70 ns read access time, hardware top-block protection (3E000H–3FFFFH), and JEDEC-standard x16 parallel interface for embedded firmware storage in industrial controllers and legacy BIOS modules.
For engineers reviewing the SST39VF402C-70-4I-EKE datasheet, SST39VF402C-70-4I-EKE pinout, SST39VF402C-70-4I-EKE application, or SST39VF402C-70-4I-EKE equivalent, this page delivers verified package mapping (48-lead TSOP), confirmed sector/block erase architecture, real-world endurance (100,000 cycles), and precise boot-block address range - all validated against Microchip DS20005053B.
Technical Context
This device implements SuperFlash® split-gate technology with thick-oxide tunneling injector, enabling fixed erase/program timing independent of cycle count - eliminating software de-rating required by conventional flash. Its 256K × 16 organization supports byte-wide or word-wide addressing via AMS-A0 address inputs (A17–A0), with latched address/data and CMOS I/O compatibility.
It integrates three write status detection methods: RY/BY# open-drain output (requires external 10–100 kΩ pull-up), DQ7 Data# Polling, and dual-toggle bits on DQ6/DQ2 - each valid after defined WE#/CE# edge counts per operation type. Hardware block protection is activated when WP# is grounded, locking the top 8 KWord boot sector.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 4 Mbit (256K × 16), directly maps to 512 KB of 16-bit data space |
| Read Access Time | 70 ns - enables direct connection to 14 MHz bus without wait states |
| Supply Voltage | 2.7–3.6 V - compatible with 3.3 V systems including brown-out tolerant designs |
| Endurance | 100,000 program/erase cycles - supports field firmware updates over 10+ years |
| Data Retention | >100 years - suitable for unpowered archival storage in industrial equipment |
| Active Current | 5 mA typical at 5 MHz - low power for battery-backed or energy-constrained hosts |
| Standby Current | 3 µA typical - enables ultra-low-power sleep mode in always-on controllers |
| Erase Architecture | Uniform 2 KWord sectors + flexible blocks (seven 32K, one 16K, two 4K, one 8K) - allows granular firmware partitioning |
Pinout & Package
Package: 48-lead TSOP (12 mm × 20 mm), RoHS-compliant, standard JEDEC x16 flash footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A17–A0 | Address Inputs | AMS = A17; during sector-erase, AMS–A11 select sector; during block-erase, AMS–A15 select block |
| DQ15–DQ0 | Data I/O | 16-bit bidirectional bus; outputs tri-stated when OE# or CE# high; data latched internally on write |
| CE# | Chip Enable | Active-low chip select; device deselected (standby) when high |
| OE# | Output Enable | Active-low output gate; controls data bus drive; no effect on internal operations |
| WE# | Write Enable | Controls timing of command latching; falling edge latches address, rising edge latches data |
| WP# | Write Protect | Grounding protects top 8 KWord boot block (3E000H–3FFFFH); floating = internally pulled high |
| RST# | Hardware Reset | Forces immediate return to Read mode; required TRP low pulse to abort ongoing erase/program |
| RY/BY# | Ready/Busy# | Open-drain status output; low = active erase/program; requires external pull-up resistor |
| VDD | Power Supply | 2.7–3.6 V supply; powers core logic and SuperFlash array |
| VSS | Ground | Reference for all digital and analog circuitry; two dedicated pins for noise reduction |
| NC | No Connection | Unbonded pins (A13, A9, A12, A8, A14, A15, A16, A11, A13, A12, etc.) - must remain unconnected |
Key Features
| Feature | Design Value |
|---|---|
| Erase-Suspend/Resume | Allows reading or programming non-suspended sectors during active erase - critical for real-time firmware patching |
| Auto Low Power Mode | Reduces active read current from 5 mA to 3 µA after valid access - cuts dynamic power by >99% between reads |
| Security ID Space | 128-bit factory-programmed ID + 128-word user-programmable segment - enables secure device authentication and version tracking |
| Hardware Block Protection | Top 8 KWord boot block (3E000H–3FFFFH) locked when WP# = GND - prevents accidental BIOS corruption |
| Internal VPP Generation | Eliminates external high-voltage supply - simplifies PCB layout and reduces BOM cost |
| CFI Support | JEDEC Common Flash Interface compliant - enables OS-level auto-detection and standardized driver integration |
Applications
| Industrial PLC Firmware Storage | Legacy PC BIOS/UEFI Module |
|---|---|
Use Scenario: Storing ladder logic firmware and configuration tables in programmable logic controllers deployed in factory automation environments with wide temperature ranges. IC Role / Device Role / Timing Role: Nonvolatile program memory mapped into CPU address space; accessed via 16-bit parallel bus with 70 ns timing compliance. Use Value: 100,000-cycle endurance ensures reliable field updates across 15+ years of maintenance cycles without replacement. |
Use Scenario: Hosting boot firmware in legacy desktop motherboards requiring x16 interface compatibility and top-boot block protection. IC Role / Device Role / Timing Role: Primary BIOS flash memory; top 8 KWord block stores reset vector and recovery code, protected by WP# grounding. Use Value: Hardware top-block protection prevents accidental overwrite of critical boot code during BIOS update routines. |
| Medical Device Configuration Memory | Telecom Base Station Boot Loader |
Use Scenario: Retaining calibration parameters and safety-critical operational settings in Class II medical instruments subject to regulatory audit. IC Role / Device Role / Timing Role: Secure configuration store with 128-bit factory ID and user-programmable Security ID segment for traceability. Use Value: >100-year data retention meets FDA long-term recordkeeping requirements without backup power or refresh. |
Use Scenario: Storing primary boot loader and FPGA bitstreams in outdoor telecom base stations exposed to thermal cycling and voltage transients. IC Role / Device Role / Timing Role: High-reliability flash with SuperFlash® technology - fixed erase times prevent timing drift over lifetime. Use Value: Fixed 18 ms sector/block erase time eliminates need for software timeout recalibration during product lifecycle. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar parallel NOR flash applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SST39VF401C-70-4I-EKE | Bottom-boot architecture (00000H–01FFFH protected); identical timing, voltage, and pinout | Used where boot code resides in lowest memory region instead of top region | Select only if bottom-block protection matches system bootloader location |
| MX29LV400CTTI-70G | 70 ns access, 4 Mbit x16, but uses different command set (no CFI support) and lacks Erase-Suspend | Requires custom driver adaptation; no runtime suspend capability for concurrent operations | Choose only when legacy driver reuse outweighs feature loss and long-term support risk |
Compared with SST39VF402C-70-4I-EKE, SST39VF401C-70-4I-EKE offers identical performance but inverted boot-block orientation, while MX29LV400CTTI-70G sacrifices CFI compatibility and Erase-Suspend for marginally lower cost - making SST39VF402C-70-4I-EKE optimal for new designs requiring field-upgradable reliability and standardized tooling.
Availability
SST39VF402C-70-4I-EKE is available at Aetrix Electronics and suitable for industrial PLC firmware storage, legacy BIOS modules, medical device configuration memory, and telecom base station boot loaders requiring stable component supply across extended product lifecycles.
Supply support for SST39VF402C-70-4I-EKE 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 global semiconductor company specializing in microcontrollers, analog devices, and memory solutions, with broad industrial and automotive qualification coverage.
SST39VF402C-70-4I-EKE belongs to the Multi-Purpose Flash Plus (MPF+) product line, designed specifically for cost-sensitive, high-reliability embedded systems requiring robust firmware storage with hardware-based protection and JEDEC interoperability.
FAQ
What is the exact boot block protection scheme for SST39VF402C-70-4I-EKE?
The SST39VF402C-70-4I-EKE implements top hardware block protection: grounding the WP# pin locks the top 8 KWord (32 KB) memory region from program/erase operations. This corresponds to address range 3E000H–3FFFFH, as specified in Table 4 of Microchip DS20005053B. The protection is active only when WP# is driven low; if left floating, an internal pull-up disables protection.
Does SST39VF402C-70-4I-EKE support CFI (Common Flash Interface)?
Yes, SST39VF402C-70-4I-EKE fully supports JEDEC CFI. It responds to the standard three-byte entry sequence (555H/AAH → 2AAH/55H → 555H/98H) and provides complete CFI query table data at addresses 10H–26H, including VDD min/max, erase timeouts, and command set identification - enabling automatic driver detection in Linux MTD and U-Boot environments.
What are the valid methods to detect completion of a Word-Program operation on SST39VF402C-70-4I-EKE?
SST39VF402C-70-4I-EKE provides three simultaneous detection methods: RY/BY# pin (active-low open-drain signal), DQ7 Data# Polling (complement-to-data toggles until completion), and DQ6 Toggle Bit (alternating 1/0 until operation ends). All are valid after the rising edge of the fourth WE# or CE# pulse, as confirmed in Figure 9 and Table 3 of DS20005053B.
Can SST39VF402C-70-4I-EKE be used in place of SST39VF401C-70-4I-EKE without hardware changes?
No - although pinout, timing, and voltage are identical, SST39VF402C-70-4I-EKE and SST39VF401C-70-4I-EKE differ in boot-block orientation: SST39VF402C-70-4I-EKE protects the top 8 KWord (3E000H–3FFFFH), while SST39VF401C-70-4I-EKE protects the bottom 8 KWord (00000H–01FFFH). Substitution requires matching bootloader address mapping.
What is the purpose of the Security ID feature in SST39VF402C-70-4I-EKE?
The Security ID in SST39VF402C-70-4I-EKE comprises a factory-programmed 128-bit random number (read-only) and a 128-word user-programmable segment. It enables device authentication, firmware version binding, and anti-cloning - accessed via the 88H command sequence. Once locked using the 85H command, the user segment becomes permanently read-only, ensuring tamper-resistant identity storage.
SST39VF402C-70-4I-EKE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- SST39 MPF™
- Package/Case:
- 48-TFSOP (0.724", 18.40mm Width)
- 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-TSOP
SST39VF402C-70-4I-EKE FAQ
1.How can I place an order for SST39VF402C-70-4I-EKE through Aetrix?
Please submit a Request for Quotation (RFQ) for SST39VF402C-70-4I-EKE 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-EKE reliable?
The price and inventory of SST39VF402C-70-4I-EKE 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-EKE is usually 5 days.
3.What payment methods are accepted for SST39VF402C-70-4I-EKE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST39VF402C-70-4I-EKE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST39VF402C-70-4I-EKE?
SST39VF402C-70-4I-EKE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST39VF402C-70-4I-EKE 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-EKE?
For technical support, including SST39VF402C-70-4I-EKE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SST39VF402C-70-4I-EKE requirements.
6.How does Aetrix verify that SST39VF402C-70-4I-EKE is sourced from the original manufacturer or authorized distributors?
All SST39VF402C-70-4I-EKE 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-EKE meets industry standards.
7.What is the process for return or replacement of SST39VF402C-70-4I-EKE?
All SST39VF402C-70-4I-EKE units undergo pre-shipment inspection (PSI). If there is an issue with SST39VF402C-70-4I-EKE, 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-EKE part is unused and in its original packaging.
Return procedure for SST39VF402C-70-4I-EKE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SST39VF402C-70-4I-EKE Tags
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