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Microchip Technology SST39VF400A-70-4I-C1QE
- Part No.:
- SST39VF400A-70-4I-C1QE
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 48-UFLGA
- Datasheet:
-
SST39VF400A-70-4I-C1QE.pdf
- Description:
- IC FLASH 4MBIT PARALLEL 48XFLGA
- Quantity:
- Payment:
- Shipping:
Inventory:4,639
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Product details
Overview
SST39VF400A-70-4I-C1QE from Microchip Technology is a 4 Mbit (256K × 16) CMOS Multi-Purpose Flash memory IC using SuperFlash technology, operating at 2.7–3.6 V with 70 ns read access time and JEDEC-standard x16 asynchronous interface. It supports sector/block/chip erase, word-program, and data polling/toggle-bit write status detection for embedded firmware storage in industrial control systems.
For engineers reviewing the SST39VF400A-70-4I-C1QE datasheet, SST39VF400A-70-4I-C1QE pinout, SST39VF400A-70-4I-C1QE application, or SST39VF400A-70-4I-C1QE equivalent, key selection criteria include its 2.7–3.6 V single-supply operation, 100,000-cycle endurance, 4 KWord uniform sector architecture, TSOP-48 package compatibility, and hardware/software data protection features.
Technical Context
The SST39VF400A-70-4I-C1QE implements a split-gate SuperFlash cell with thick-oxide tunneling injector for enhanced reliability and fixed erase/program timing independent of cycle count. Its command-set architecture follows JEDEC standard pinouts and supports Software Data Protection (SDP) via six-byte sequences for erase and three-byte sequences for program.
It provides dual write-completion detection via DQ7 (Data# Polling) and DQ6 (Toggle Bit), both valid after the sixth WE# pulse for erase operations. The device integrates CFI Query mode for runtime geometry identification and supports uniform 2 KWord sectors (128 total) and 32 KWord blocks (8 total).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 4 Mbit (256K × 16), enabling storage of firmware images up to 512 KB in x16 bus configurations |
| Read Access Time | 70 ns - determines maximum sustained read throughput in 14 MHz system clocks |
| Supply Voltage | 2.7–3.6 V - supports wide-input industrial power rails without external regulation |
| Endurance | 100,000 program/erase cycles - ensures long-term field reliability in firmware update applications |
| Data Retention | >100 years - guarantees nonvolatile data integrity across product lifecycle without refresh |
| Erase Architecture | Uniform 2 KWord sectors (128 sectors) and 32 KWord blocks (8 blocks) - enables granular, low-risk firmware patching |
| Write Timing | 14 µs word-program, 18 ms sector/block-erase, 70 ms chip-erase - defines minimum update latency per operation |
Pinout & Package
Package: 48-lead TSOP (12 mm × 20 mm), RoHS-compliant, surface-mountable with standard reflow profile (260°C for 10 s).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | A0–A16 used for 256K × 16 addressing; A17 selects upper/lower half of 512K address space in 4 Mbit mode |
| DQ0–DQ15 | Data I/O | 16-bit bidirectional bus with internal latching during writes; tri-stated when CE# or OE# high |
| CE# | Chip Enable | Active-low global device select; disables all functions and reduces current to 20 µA in standby |
| OE# | Output Enable | Active-low output gate control; allows data read without asserting CE#, useful for bus sharing |
| WE# | Write Enable | Active-low control for program/erase command latching; initiates internal timing on rising edge |
| VDD | Power Supply | 2.7–3.6 V supply; powers core logic and SuperFlash array; no external VPP required |
| VSS | Ground | Two dedicated ground pins (pins 23 and 47) reduce noise coupling in high-speed reads |
| NC | No Connection | Pins 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46 - electrically isolated |
Key Features
| Feature | Design Value |
|---|---|
| SuperFlash Technology | Split-gate cell with thick-oxide injector delivers fixed 14 µs program and 18 ms erase times across full lifetime |
| JEDEC x16 Compatibility | Standard pinout and command set enable drop-in replacement for legacy parallel flash in existing PCB layouts |
| Hardware + Software Protection | Glitch filtering (<5 ns), VDD lockout (<1.5 V), and mandatory SDP command sequences prevent accidental writes |
| CFI Query Mode | Runtime-accessible geometry table (Tables 5–9) allows host firmware to auto-detect density, sector count, and block size |
| Low Power Standby | 20 µA typical ISB enables battery-backed operation in always-on industrial controllers |
Applications
| Industrial PLC Firmware Storage | Medical Device Boot Code |
|---|---|
Use Scenario: Storing programmable logic controller firmware updated via HMI or remote diagnostics. IC Role / Device Role / Timing Role: Nonvolatile code storage with sector-erase capability enabling partial firmware updates without full chip reflash. Use Value: 128 uniform 2 KWord sectors allow safe patching of individual function modules while preserving configuration data. | Use Scenario: Holding certified boot loader and safety-critical initialization routines in Class II medical equipment. IC Role / Device Role / Timing Role: Secure, long-retention code execution source verified at power-up before main processor initialization. Use Value: >100-year data retention and 100,000-cycle endurance meet IEC 62304 software lifecycle requirements. |
| Automotive ECU Calibration Data | Networking Equipment Configuration |
Use Scenario: Storing engine calibration maps and diagnostic trouble codes in automotive ECUs operating across -40°C to +85°C. IC Role / Device Role / Timing Role: Industrial-grade flash memory supporting AEC-Q100 temperature range with robust write-protection. Use Value: 2.7–3.6 V operation and -40°C to +85°C rating ensure reliable logging under vehicle battery voltage sag and thermal stress. | Use Scenario: Maintaining switch/router configuration profiles and firmware images in carrier-grade networking gear. IC Role / Device Role / Timing Role: High-reliability parallel flash for dual-image storage with fast 70 ns read access supporting real-time failover. Use Value: 8 uniform 32 KWord blocks enable atomic swap between active/inactive firmware partitions with minimal downtime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SST39VF400A-70-4C-C1QE | Commercial temperature grade (0°C to +70°C) vs. industrial (-40°C to +85°C); identical electrical specs and pinout | Not rated for extended temperature environments; unsuitable for under-hood automotive or outdoor telecom use | Select only for cost-sensitive consumer or lab-grade applications within controlled ambient conditions |
| MX29LV400CTTI-70G | 4 Mbit x16 CFI-compliant flash with 70 ns access, but uses different command set and lacks SuperFlash fixed-timing guarantee | Requires modified driver firmware due to non-identical SDP sequence and erase timing variability over lifetime | Choose only when migrating legacy designs already using Macronix architecture and validated drivers |
Compared with SST39VF400A-70-4I-C1QE, the SST39VF400A-70-4C-C1QE offers identical functionality at lower cost but sacrifices industrial temperature support, while MX29LV400CTTI-70G requires firmware adaptation and exhibits increasing erase time degradation over 10,000+ cycles.
Availability
SST39VF400A-70-4I-C1QE is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device boot code, automotive ECU calibration data, and networking equipment configuration requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SST39VF400A-70-4I-C1QE 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 2010 and continues to manufacture and support the SST39VF family as part of its broad portfolio of nonvolatile memory solutions.
The SST39VF series was designed specifically for embedded systems requiring robust, low-voltage, sector-erasable parallel flash with JEDEC compatibility and long-term data retention - targeting industrial, medical, and automotive firmware storage.
FAQ
What is the guaranteed operating temperature range for SST39VF400A-70-4I-C1QE?
The SST39VF400A-70-4I-C1QE is rated for industrial temperature operation from -40°C to +85°C, validated per Microchip's DS25001A datasheet. This range ensures reliable performance in harsh environments such as factory automation controllers, automotive under-hood modules, and outdoor telecommunications equipment where ambient extremes occur.
Does SST39VF400A-70-4I-C1QE require an external VPP voltage for programming?
No, the SST39VF400A-70-4I-C1QE does not require an external VPP voltage. It generates all necessary high-voltage programming pulses internally using its on-chip charge pump, enabling single 2.7–3.6 V supply operation. This eliminates external high-voltage circuitry and simplifies board design compared to older flash technologies.
How many erase sectors does SST39VF400A-70-4I-C1QE support, and what is their size?
The SST39VF400A-70-4I-C1QE supports 128 uniform erase sectors, each sized at 2 KWords (4 KBytes). This architecture is confirmed in Table 8 of DS25001A and enables precise, low-risk firmware updates - for example, modifying a single driver module without affecting bootloader or calibration data stored in adjacent sectors.
Is SST39VF400A-70-4I-C1QE pin-compatible with SST39LF400A variants?
Yes, SST39VF400A-70-4I-C1QE is pin-compatible with SST39LF400A-70-4I-C1QE and other members of the SST39LF/VF400A family in the same package (e.g., TSOP-48), sharing identical pin assignments, command sets, and x16 bus interface. The primary difference is supply voltage range: VF = 2.7–3.6 V, LF = 3.0–3.6 V.
What write completion detection methods does SST39VF400A-70-4I-C1QE support?
The SST39VF400A-70-4I-C1QE supports two standardized write completion detection methods: Data# Polling (monitoring DQ7) and Toggle Bit (monitoring DQ6). Both are valid after the sixth WE# pulse for erase operations and fourth WE# pulse for program operations, allowing host firmware to poll asynchronously without fixed timeout delays.
SST39VF400A-70-4I-C1QE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- SST39 MPF™
- Package/Case:
- 48-UFLGA
- Packaging:
- Tray
- Product Status:
- Obsolete
- 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:
- 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:
- 48-XFLGA (6x4)
SST39VF400A-70-4I-C1QE FAQ
1.How can I place an order for SST39VF400A-70-4I-C1QE through Aetrix?
Please submit a Request for Quotation (RFQ) for SST39VF400A-70-4I-C1QE 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 SST39VF400A-70-4I-C1QE reliable?
The price and inventory of SST39VF400A-70-4I-C1QE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SST39VF400A-70-4I-C1QE is usually 5 days.
3.What payment methods are accepted for SST39VF400A-70-4I-C1QE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST39VF400A-70-4I-C1QE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST39VF400A-70-4I-C1QE?
SST39VF400A-70-4I-C1QE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST39VF400A-70-4I-C1QE 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 SST39VF400A-70-4I-C1QE?
For technical support, including SST39VF400A-70-4I-C1QE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SST39VF400A-70-4I-C1QE requirements.
6.How does Aetrix verify that SST39VF400A-70-4I-C1QE is sourced from the original manufacturer or authorized distributors?
All SST39VF400A-70-4I-C1QE 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 SST39VF400A-70-4I-C1QE meets industry standards.
7.What is the process for return or replacement of SST39VF400A-70-4I-C1QE?
All SST39VF400A-70-4I-C1QE units undergo pre-shipment inspection (PSI). If there is an issue with SST39VF400A-70-4I-C1QE, 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 SST39VF400A-70-4I-C1QE part is unused and in its original packaging.
Return procedure for SST39VF400A-70-4I-C1QE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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