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Microchip Technology SST39VF400A-70-4I-MAQE-T
- Part No.:
- SST39VF400A-70-4I-MAQE-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 48-WFBGA
- Datasheet:
-
SST39VF400A-70-4I-MAQE-T.pdf
- Description:
- IC FLASH 4MBIT PARALLEL 48WFBGA
- Quantity:
- Payment:
- Shipping:
Inventory:2,910
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Product details
Overview
SST39VF400A-70-4I-MAQE-T from Microchip Technology is a 4 Mbit (256K × 16) CMOS Multi-Purpose Flash memory IC using SuperFlash technology, supporting single-supply 2.7–3.6V read/write operations, 70 ns read access time, and uniform 2 KWord sector / 32 KWord block erase architecture. It serves as nonvolatile program/data storage in embedded controllers, industrial HMIs, and legacy BIOS modules.
For engineers reviewing the SST39VF400A-70-4I-MAQE-T datasheet, SST39VF400A-70-4I-MAQE-T pinout, SST39VF400A-70-4I-MAQE-T application, or SST39VF400A-70-4I-MAQE-T equivalent, key selection criteria include voltage range compatibility (2.7–3.6V), TSOP-48 package footprint, JEDEC x16 asynchronous interface compliance, and software data protection command sequence requirements.
Technical Context
This device implements a split-gate SuperFlash cell with thick-oxide tunneling injector for enhanced endurance and data retention. It uses standard JEDEC-compliant command sets (e.g., 6-byte sector/block/erase sequences) and supports both Data# Polling (DQ7) and Toggle Bit (DQ6) for end-of-write detection.
Operation relies on latched address/data buses, CMOS I/O compatibility, and hardware/software write protection - including noise/glitch immunity (<5 ns pulse rejection), VDD power-up/down detection (<1.5V inhibit), and mandatory three-byte Program / six-byte Erase software command sequences.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 4 Mbit (256K × 16 organization), enabling 512 KB of byte-addressable storage space |
| Read Access Time | 70 ns maximum - defines minimum bus cycle timing for reliable CPU read operations |
| Supply Voltage | 2.7–3.6V - 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 | Greater than 100 years - guarantees nonvolatile storage integrity across product lifecycle |
| Erase Architecture | Uniform 2 KWord sectors (128 total) and 32 KWord blocks (8 total) - enables granular, low-overhead firmware patching |
| Write Timing | 14 µs typical word-program time; 18 ms typical sector/block-erase time - determines firmware update latency |
Pinout & Package
Package: 48-lead TSOP (12 mm × 20 mm), RoHS-compliant, surface-mountable with standard reflow profile (260°C/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-word space per JEDEC mapping |
| DQ0–DQ15 | Data I/O | Bi-directional x16 data bus; tri-stated when CE# or OE# high; internally latched during write |
| CE# | Chip Enable | Active-low chip select - must be low to enable internal logic and memory array access |
| OE# | Output Enable | Active-low output gate - controls DQ bus drivers independently of CE# for read multiplexing |
| WE# | Write Enable | Active-low write control - initiates command latching and internal program/erase timing sequences |
| VDD | Power Supply | 2.7–3.6V supply input; powers core logic, memory array, and I/O buffers |
| VSS | Ground | Primary reference for all signals and internal circuitry; two dedicated pins for low-noise operation |
| NC | No Connection | Unbonded pins (e.g., A18 in 400A variant); must remain unconnected per design |
Key Features
| Feature | Design Value |
|---|---|
| SuperFlash Technology | Split-gate cell with thick-oxide injector enables fixed 14 µs program and 18 ms erase times - eliminates performance de-rating over lifetime |
| Software Data Protection | Mandatory 3-byte (Program) or 6-byte (Erase) command sequences prevent accidental writes during power transitions |
| JEDEC x16 Compliance | Standard pinout and command set ensure drop-in replacement compatibility with other x16 flash devices in existing designs |
| Low Standby Current | 3 µA typical - reduces system-level quiescent power in battery-backed or energy-sensitive applications |
| CFI Support | Common Flash Interface provides standardized geometry and timing data at known addresses - simplifies auto-detection in bootloader code |
Applications
| Industrial HMI Firmware Storage | Legacy PC BIOS Memory |
|---|---|
Use Scenario: Storing boot firmware and configuration data in panel-mounted human-machine interface terminals operating in -40°C to +85°C environments. IC Role / Device Role / Timing Role: Nonvolatile x16 parallel flash memory providing direct CPU bus interface with 70 ns read access for fast boot execution. Use Value: 2.7–3.6V operation eliminates need for dedicated 3.3V LDO; 100-year data retention ensures calibration and setup data integrity over equipment lifetime. | Use Scenario: Replacing obsolete BIOS ROM in legacy desktop motherboards requiring pin-compatible, JEDEC-standard x16 flash. IC Role / Device Role / Timing Role: Drop-in BIOS code storage with identical TSOP-48 footprint and command-set compatibility for minimal board redesign. Use Value: Uniform 2 KWord sector erase allows selective BIOS module updates without full chip reprogramming; CFI support enables automatic vendor/model identification in UEFI firmware. |
| Embedded Controller Code Storage | Medical Device Configuration Memory |
Use Scenario: Holding application firmware and runtime parameters in microcontroller-based motor drives with infrequent field updates. IC Role / Device Role / Timing Role: External program memory mapped into MCU address space via parallel bus; supports in-system programming via WE#/CE# controlled sequences. Use Value: 100,000-cycle endurance exceeds typical field update frequency; software data protection prevents corruption during brown-out conditions. | Use Scenario: Storing calibrated sensor offsets, user preferences, and regulatory audit logs in Class II medical diagnostic instruments. IC Role / Device Role / Timing Role: Secure, long-life nonvolatile memory with hardware write-inhibit during power transitions and verified data retention >100 years. Use Value: Dual VSS pins reduce ground bounce in mixed-signal environments; RoHS-compliant lead-free packaging meets global medical regulatory requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MX29LV400CTTI-70G | 4 Mbit x16, 70 ns, 2.7–3.6V, but uses different command set and lacks CFI support | Requires firmware driver modification; no auto-detection capability | Choose only if existing design already uses Macronix command protocol |
| EN29LV400AT-70TP | 4 Mbit x16, 70 ns, 2.7–3.6V, supports JEDEC commands but has 50 µA standby current vs. 3 µA | Higher quiescent power limits use in battery-powered devices | Select when CFI is unnecessary and lower-cost sourcing is prioritized over ultra-low ISB |
Compared with MX29LV400CTTI-70G and EN29LV400AT-70TP, the SST39VF400A-70-4I-MAQE-T delivers superior low-power standby operation (3 µA), built-in CFI for bootloader flexibility, and guaranteed fixed erase/program timing - critical for deterministic firmware update behavior in safety-critical systems.
Availability
SST39VF400A-70-4I-MAQE-T is available at Aetrix Electronics and suitable for industrial HMIs, legacy BIOS upgrades, and embedded controller code storage requiring stable component supply, long-term lifecycle support, and RoHS-compliant manufacturing.
Supply support for SST39VF400A-70-4I-MAQE-T 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 provider of microcontrollers, analog components, and memory solutions, acquired Silicon Storage Technology (SST) in 2010 to expand its nonvolatile memory portfolio.
The SST39VF400A-70-4I-MAQE-T belongs to the SST39VF family of Multi-Purpose Flash devices designed specifically for cost-sensitive, industrial-grade embedded systems requiring robust, low-voltage, parallel-interface nonvolatile memory with high endurance and long data retention.
FAQ
What is the exact memory organization of the SST39VF400A-70-4I-MAQE-T?
The SST39VF400A-70-4I-MAQE-T is organized as 256K words × 16 bits (4 Mbit total), providing 512 KB of addressable storage space. Its address bus uses A0–A16 for word selection, with A17 used in command sequences to define upper/lower half addressing per JEDEC specification. This matches the 256K × 16 structure confirmed in Tables 7–8 of DS25001A.
Does the SST39VF400A-70-4I-MAQE-T support Common Flash Interface (CFI)?
Yes, the SST39VF400A-70-4I-MAQE-T supports CFI mode via the standard 3-byte entry sequence (5555H/AAH → 2AAAH/55H → 5555H/98H). Once entered, CFI data is readable at defined addresses (e.g., 10H–12H = "QRY") and provides standardized geometry, timing, and command-set information - enabling automatic detection in bootloader implementations.
What are the valid operating temperature and voltage ranges for the SST39VF400A-70-4I-MAQE-T?
The SST39VF400A-70-4I-MAQE-T is rated for Industrial temperature range (-40°C to +85°C) and operates from 2.7V to 3.6V. These specifications are explicitly stated in the "Operating Range" table on page 14 of DS25001A and align with the "-I" suffix denoting Industrial grade in the part number.
How does the SST39VF400A-70-4I-MAQE-T detect completion of Program or Erase operations?
The SST39VF400A-70-4I-MAQE-T provides two software methods: Data# Polling (DQ7 toggles until completion, then returns true data) and Toggle Bit (DQ6 toggles between 0/1 during operation, stops when complete). Both are valid after the rising edge of the fourth WE# pulse for Program and sixth for Erase, as defined in DS25001A Sections 7–8.
Is the SST39VF400A-70-4I-MAQE-T pin-compatible with the SST39LF400A series?
No - while both share the same 48-lead TSOP package and JEDEC x16 pinout, the SST39VF400A-70-4I-MAQE-T requires 2.7–3.6V operation and uses A17 as the most significant address bit, whereas SST39LF400A requires 3.0–3.6V and uses A16. Voltage mismatch and address mapping differences preclude direct substitution without system-level validation.
SST39VF400A-70-4I-MAQE-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- SST39 MPF™
- Package/Case:
- 48-WFBGA
- Packaging:
- Tape & Reel (TR)
- 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:
- 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-WFBGA (6x4)
SST39VF400A-70-4I-MAQE-T FAQ
1.How can I place an order for SST39VF400A-70-4I-MAQE-T through Aetrix?
Please submit a Request for Quotation (RFQ) for SST39VF400A-70-4I-MAQE-T 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-MAQE-T reliable?
The price and inventory of SST39VF400A-70-4I-MAQE-T 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-MAQE-T is usually 5 days.
3.What payment methods are accepted for SST39VF400A-70-4I-MAQE-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST39VF400A-70-4I-MAQE-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST39VF400A-70-4I-MAQE-T?
SST39VF400A-70-4I-MAQE-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST39VF400A-70-4I-MAQE-T 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-MAQE-T?
For technical support, including SST39VF400A-70-4I-MAQE-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SST39VF400A-70-4I-MAQE-T requirements.
6.How does Aetrix verify that SST39VF400A-70-4I-MAQE-T is sourced from the original manufacturer or authorized distributors?
All SST39VF400A-70-4I-MAQE-T 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-MAQE-T meets industry standards.
7.What is the process for return or replacement of SST39VF400A-70-4I-MAQE-T?
All SST39VF400A-70-4I-MAQE-T units undergo pre-shipment inspection (PSI). If there is an issue with SST39VF400A-70-4I-MAQE-T, 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-MAQE-T part is unused and in its original packaging.
Return procedure for SST39VF400A-70-4I-MAQE-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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