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Microchip Technology SST39WF400B-70-4I-MAQE
- Part No.:
- SST39WF400B-70-4I-MAQE
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 48-WFBGA
- Datasheet:
-
SST39WF400B-70-4I-MAQE.pdf
- Description:
- IC FLASH 4MBIT PARALLEL 48WFBGA
- Quantity:
- Payment:
- Shipping:
Inventory:4,272
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Product details
Overview
SST39WF400B-70-4I-MAQE from Microchip Technology is a 4 Mbit (256K × 16) Multi-Purpose Flash memory IC using SuperFlash technology, operating from 1.65–1.95 V, with 70 ns read access time, 100,000 write/erase cycles endurance, and >100-year data retention. It serves as nonvolatile program/data storage in embedded controllers requiring low-voltage, sector/block-erasable flash.
For engineers reviewing the SST39WF400B-70-4I-MAQE datasheet, SST39WF400B-70-4I-MAQE pinout, SST39WF400B-70-4I-MAQE application, or SST39WF400B-70-4I-MAQE equivalent, key selection considerations include its x16 asynchronous interface, JEDEC-standard command set, 48-ball WFBGA/XFLGA/TFBGA packaging, and support for Data# Polling (DQ7) and Toggle Bit (DQ6) write completion detection.
Technical Context
The SST39WF400B-70-4I-MAQE implements a split-gate SuperFlash cell architecture with thick-oxide tunneling injector, enabling fixed erase/program times independent of cycle count. It supports three erase granularities: uniform 2 KWord sectors (128 total), 32 KWord blocks (8 total), and full-chip erase - all initiated via JEDEC-compliant six-byte command sequences.
It features CMOS I/O compatibility, hardware noise/glitch protection (<5 ns pulse rejection), VDD power-up/down write inhibition, and dual software data protection (SDP) for Program (3-byte sequence) and Erase (6-byte sequence). The device integrates CFI Query mode (SST and general) and Product ID entry for system identification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 256K × 16 (4 Mbit total); supports x16 parallel data bus interface |
| Read Access Time | 70 ns; enables high-speed instruction fetch or data lookup in real-time systems |
| Supply Voltage | 1.65–1.95 V; compatible with low-power 1.8 V logic domains without level shifting |
| Endurance | 100,000 cycles (typical); sufficient for firmware update logging or configuration storage in industrial controllers |
| Data Retention | >100 years; ensures long-term reliability in unpowered storage applications |
| Active Current | 5 mA (typical at 5 MHz); minimizes dynamic power in battery-backed or energy-constrained designs |
| Standby Current | 5 µA (typical); supports ultra-low-power sleep modes in portable or remote devices |
| Erase/Program Detection | Toggle Bit (DQ6) and Data# Polling (DQ7); eliminates need for external timers or status polling overhead |
Pinout & Package
Package: 48-ball WFBGA (4 mm × 6 mm), 48-ball XFLGA (4 mm × 6 mm), or 48-ball TFBGA (6 mm × 8 mm); RoHS compliant. Pinout conforms to JEDEC standard x16 memory assignments.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | A0–A16 select 256K words; A17 (AMS) used for sector/block address decoding during erase commands |
| DQ0–DQ15 | Data Input/Output | 16-bit bidirectional data bus; latched internally during Program; tri-stated when CE# or OE# high |
| CE# | Chip Enable | Active-low chip select; must be low for Read, Program, or Erase operations; controls standby current entry |
| OE# | Output Enable | Active-low output gate; enables data output during Read; high-Z state prevents bus contention |
| WE# | Write Enable | Active-low control for Program/Erase command latching; timing-critical for command sequence execution |
| VDD | Power Supply | 1.65–1.95 V supply; powers core logic and memory array; internal VPP generation eliminates external pump |
| VSS | Ground | Two dedicated ground balls (per package drawings); critical for noise immunity in high-speed read/write |
| NC | No Connection | Unbonded pins (e.g., A11/A12 in some ball maps); must remain floating per JEDEC compliance |
Key Features
| Feature | Design Value |
|---|---|
| SuperFlash Technology | Split-gate cell with thick-oxide tunneling injector delivers fixed 36 ms sector/block erase and 28 µs word-program times across full lifecycle |
| Uniform Erase Architecture | 128 × 2 KWord sectors + 8 × 32 KWord blocks enable precise, low-energy updates without full-chip erasure |
| JEDEC-Compliant Command Set | Fully compatible with industry-standard x16 flash command protocols (e.g., 5555H/2AAAH sequences), ensuring drop-in firmware compatibility |
| Hardware + Software Data Protection | Glitch filtering, VDD monitoring, and mandatory 3-/6-byte SDP sequences prevent accidental writes during power transitions |
| CFI and Product ID Support | Integrated CFI tables (SST and general modes) and software-readable Manufacturer ID (00BFH) / Device ID (272EH) simplify auto-detection in multi-vendor systems |
Applications
| Industrial PLC Firmware Storage | Medical Device Configuration Memory |
|---|---|
|
Use Scenario: Storing field-upgradable ladder logic and I/O mapping tables in programmable logic controllers deployed in factory automation environments. IC Role / Device Role / Timing Role: Nonvolatile program memory providing boot code and runtime configuration with guaranteed 100,000-cycle endurance under frequent firmware revision cycles. Use Value: Eliminates need for external EEPROM or serial flash by supporting fast, sector-level reprogramming without disrupting controller operation. |
Use Scenario: Holding calibration parameters, user preferences, and regulatory audit logs in portable diagnostic equipment requiring FDA-compliant data integrity. IC Role / Device Role / Timing Role: Secure, long-retention configuration storage interfaced directly to ARM Cortex-M microcontrollers via 16-bit parallel bus. Use Value: >100-year data retention and hardware/software write protection ensure traceability and compliance over product lifetime. |
| Automotive Infotainment Boot ROM | Networking Equipment Image Storage |
|
Use Scenario: Hosting boot firmware and recovery images in automotive head units operating across -40°C to +85°C ambient range. IC Role / Device Role / Timing Role: Industrial-grade (–40°C to +85°C) parallel flash memory delivering 70 ns read access for deterministic boot timing. Use Value: Single 1.8 V supply simplifies power design; JEDEC pinout ensures compatibility with existing board layouts and bootloader drivers. |
Use Scenario: Storing multiple firmware images (primary, backup, patch) in enterprise switches/routers requiring rapid failover and in-service updates. IC Role / Device Role / Timing Role: Dual-plane erasable flash enabling atomic image swaps via block-erase + word-program without downtime. Use Value: 32 KWord block erase (36 ms typical) allows sub-second firmware activation, meeting carrier-grade availability SLAs. |
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, 3.0 V operation (2.7–3.6 V), 70 ns access, 100K cycles; lacks SuperFlash fixed-timing guarantee | Requires 3.0 V supply rail; not suitable for 1.8 V-only systems; higher active current (~12 mA) | Select only if legacy 3.0 V infrastructure exists and SuperFlash timing consistency is not required. |
| S29AL004DTFI020 | 4 Mbit x16, 3.0 V (2.7–3.6 V), 70 ns, 100K cycles; supports CFI but no Toggle Bit detection; uses different command set | Command incompatibility requires firmware modification; no DQ6 toggle bit increases software polling overhead | Choose only when migrating from existing Spansion-based designs and full command rework is acceptable. |
Compared with MX29LV400CTTI-70G and S29AL004DTFI020, the SST39WF400B-70-4I-MAQE uniquely delivers 1.8 V operation, fixed SuperFlash timing, and dual-status-bit detection - enabling lower system power, deterministic firmware update latency, and simplified driver development.
Availability
SST39WF400B-70-4I-MAQE is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device configuration memory, automotive infotainment boot ROM, and networking equipment image storage requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SST39WF400B-70-4I-MAQE 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 microcontroller, analog, FPGA, and memory solutions, acquired Silicon Storage Technology (SST) in 2010 to expand its nonvolatile memory portfolio.
The SST39WF400B-70-4I-MAQE belongs to Microchip's SuperFlash MPF (Multi-Purpose Flash) product line, designed specifically for embedded systems needing reliable, low-voltage, parallel-interface flash with high endurance and long data retention in space-constrained packages.
FAQ
What voltage range does the SST39WF400B-70-4I-MAQE require for reliable operation?
The SST39WF400B-70-4I-MAQE operates within a strict 1.65 V to 1.95 V supply range for both read and write functions. Operation outside this window - including during power-up ramp - may cause undefined behavior or failed programming. Its internal VPP generator eliminates need for external high-voltage supplies, making it ideal for single-rail 1.8 V systems. Always verify VDD stability before issuing any command sequence to the SST39WF400B-70-4I-MAQE.
How does the SST39WF400B-70-4I-MAQE detect completion of a Program or Erase operation?
The SST39WF400B-70-4I-MAQE provides two hardware-supported detection methods: Data# Polling on DQ7 (complement-to-data during operation, true data upon completion) and Toggle Bit on DQ6 (alternating 0/1 until operation ends). Both are valid after the fourth WE#/CE# pulse for Program and sixth pulse for Erase. These eliminate reliance on fixed timeouts and reduce host CPU overhead - a key advantage over legacy flash devices. The SST39WF400B-70-4I-MAQE guarantees deterministic response timing due to SuperFlash fixed-cycle architecture.
Is the SST39WF400B-70-4I-MAQE pin-compatible with other 48-ball x16 flash memories?
The SST39WF400B-70-4I-MAQE adheres to JEDEC-standard x16 flash pinouts for all three supported packages (WFBGA, XFLGA, TFBGA), ensuring mechanical and signal-level compatibility with industry-standard footprints. However, command-set differences (e.g., SST-specific SDP sequences) and voltage requirements (1.65–1.95 V vs. 3.0 V) mean electrical and firmware compatibility must be verified per application. No pin-to-pin replacement claim is made for non-SST parts - always validate timing, command flow, and power sequencing for the SST39WF400B-70-4I-MAQE in your design.
What erase granularities does the SST39WF400B-70-4I-MAQE support, and how many sectors/blocks are available?
The SST39WF400B-70-4I-MAQE supports three erase modes: Sector-Erase (2 KWord per sector, 128 total), Block-Erase (32 KWord per block, 8 total), and Chip-Erase. Sector size is uniform across the array, enabling fine-grained updates; block size allows faster bulk erasure. All modes use JEDEC-compliant six-byte command sequences initiated via A17–A0 address lines. This flexibility lets system firmware optimize update speed versus wear leveling - a capability confirmed in the SST39WF400B-70-4I-MAQE datasheet Table 7 and Section 7.
Does the SST39WF400B-70-4I-MAQE include built-in data protection mechanisms?
Yes, the SST39WF400B-70-4I-MAQE implements layered protection: hardware-level noise/glitch filtering (rejects <5 ns pulses), VDD power-up/down detection (inhibits writes below 1.0 V), and Write Inhibit Mode (via OE#, CE#, or WE# states); plus software-level JEDEC-approved SDP requiring mandatory 3-byte sequences for Program and 6-byte sequences for Erase. These features are factory-enabled and prevent accidental corruption during brown-out, reset, or EMI events - critical for mission-critical storage in the SST39WF400B-70-4I-MAQE.
SST39WF400B-70-4I-MAQE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- SST39 MPF™
- Package/Case:
- 48-WFBGA
- 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:
- 40µs
- Access Time:
- 70 ns
- Voltage - Supply:
- 1.65V ~ 1.95V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-WFBGA (6x4)
SST39WF400B-70-4I-MAQE FAQ
1.How can I place an order for SST39WF400B-70-4I-MAQE through Aetrix?
Please submit a Request for Quotation (RFQ) for SST39WF400B-70-4I-MAQE 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 SST39WF400B-70-4I-MAQE reliable?
The price and inventory of SST39WF400B-70-4I-MAQE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SST39WF400B-70-4I-MAQE is usually 5 days.
3.What payment methods are accepted for SST39WF400B-70-4I-MAQE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST39WF400B-70-4I-MAQE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST39WF400B-70-4I-MAQE?
SST39WF400B-70-4I-MAQE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST39WF400B-70-4I-MAQE 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 SST39WF400B-70-4I-MAQE?
For technical support, including SST39WF400B-70-4I-MAQE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SST39WF400B-70-4I-MAQE requirements.
6.How does Aetrix verify that SST39WF400B-70-4I-MAQE is sourced from the original manufacturer or authorized distributors?
All SST39WF400B-70-4I-MAQE 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 SST39WF400B-70-4I-MAQE meets industry standards.
7.What is the process for return or replacement of SST39WF400B-70-4I-MAQE?
All SST39WF400B-70-4I-MAQE units undergo pre-shipment inspection (PSI). If there is an issue with SST39WF400B-70-4I-MAQE, 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 SST39WF400B-70-4I-MAQE part is unused and in its original packaging.
Return procedure for SST39WF400B-70-4I-MAQE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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