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Microchip Technology SST39WF400A-90-4I-B3KE-T
- Part No.:
- SST39WF400A-90-4I-B3KE-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 48-TFBGA
- Datasheet:
-
SST39WF400A-90-4I-B3KE-T.pdf
- Description:
- IC FLASH 4MBIT PARALLEL 48TFBGA
- Quantity:
- Payment:
- Shipping:
Inventory:2,855
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Product details
Overview
SST39WF400A-90-4I-B3KE-T from Silicon Storage Technology is a 4 Mbit (256K × 16) single-supply Multi-Purpose Flash memory IC with 90 ns read access time, 1.65–1.95 V operation, and JEDEC-standard x16 asynchronous interface. It delivers 100,000 program/erase cycles endurance and >100 years data retention, targeting embedded firmware storage in industrial controllers and portable instrumentation.
For engineers reviewing the SST39WF400A-90-4I-B3KE-T datasheet, SST39WF400A-90-4I-B3KE-T pinout, SST39WF400A-90-4I-B3KE-T application, or SST39WF400A-90-4I-B3KE-T equivalent, this page provides verified package mapping (48-ball TFBGA), validated sector/block-erase timing (36 ms typical), Word-Program timing (28 µs typical), toggle-bit/data# polling status detection, and JEDEC-compliant command set implementation.
Technical Context
The SST39WF400A-90-4I-B3KE-T implements SST's SuperFlash split-gate cell technology with thick-oxide tunneling injector, enabling fixed erase/program times independent of cycle count-unlike conventional flash where timing degrades over endurance life. Its internal VPP generation eliminates external high-voltage supply requirements.
It supports three erase granularities-sector (2 KWord), block (32 KWord), and chip-wide-with uniform timing (36 ms typical for sector/block, 140 ms typical for chip-erase) and uses standard microprocessor write sequences for command entry. Status detection relies exclusively on DQ6 (Toggle Bit) and DQ7 (Data# Polling), with no hardware busy pin.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 256K × 16 (4 Mbit total); enables 16-bit parallel data bus interfacing without external data-width conversion. |
| Read Access Time | 90 ns (guaranteed at 1.70–1.95 V); meets real-time boot code fetch latency requirements in MCU-based systems. |
| Supply Voltage | 1.65–1.95 V; compatible with low-power 1.8 V system rails and eliminates need for level-shifting in modern SoC designs. |
| Endurance | 100,000 program/erase cycles (typical); supports field-upgradable firmware with multi-year update cadence in industrial equipment. |
| Data Retention | >100 years (at 25°C); ensures long-term reliability for unattended deployments such as remote sensors and infrastructure monitors. |
| Word-Program Time | 28 µs (typical); enables fast in-system programming during production test or field service without excessive downtime. |
| Standby Current | 1 µA (typical); reduces quiescent power in battery-backed or energy-harvested applications. |
Pinout & Package
Package: 48-ball TFBGA (6 mm × 8 mm), RoHS-compliant, lead-free, moisture sensitivity level 3 (MSL3).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | A0–A16 select 256K words; A17 (AMS) used for sector/block address decoding in erase commands. |
| DQ0–DQ15 | Data I/O | 16-bit bidirectional bus; tri-stated when CE# or OE# is high; latched on rising edge of WE#/CE# during writes. |
| CE# | Chip Enable | Active-low device selection; must be low for read/write operations; high = standby mode (1 µA current). |
| OE# | Output Enable | Active-low output gating; controls data bus drive; high = high-impedance state regardless of CE# state. |
| WE# | Write Enable | Active-low control for write cycles; initiates command latching and internal program/erase timing on rising edge. |
| VDD | Power Supply | 1.65–1.95 V core supply; powers logic and SuperFlash array; internal charge pump generates programming voltage. |
| VSS | Ground | Primary reference for all I/O and core circuitry; two dedicated balls ensure low-impedance return path. |
| NC | No Connection | Unbonded pins (e.g., A1, A2, A5, A6, A7, A9, A10, A11, A12, A13, A14, A15, A16 in TFBGA layout); must be left floating or grounded per PCB design rules. |
Key Features
| Feature | Design Value |
|---|---|
| SuperFlash Technology | Split-gate cell with thick-oxide injector enables fixed 28 µs program and 36 ms erase times across full 100K-cycle lifetime-no software derating required. |
| JEDEC-Compliant Interface | Standard x16 pinout and command set (including CFI query support at 5555H/98H) ensures drop-in compatibility with existing flash controller firmware. |
| Multi-Granularity Erase | Independent 2 KWord sector, 32 KWord block, and full-chip erase modes allow precise firmware partitioning-e.g., separate bootloader, app, and config sectors. |
| Hardware + Software Data Protection | Glitch immunity (<5 ns pulse rejection), VDD lockout (<1.0 V inhibit), and mandatory 3-byte/6-byte command sequences prevent accidental writes during power transitions. |
| Status Detection | DQ6 Toggle Bit and DQ7 Data# Polling provide deterministic, bus-compatible write completion signaling-no external BUSY pin needed. |
Applications
| Industrial PLC Firmware Storage | Medical Device Bootloader Memory |
|---|---|
|
Use Scenario: Storing and updating ladder logic firmware in programmable logic controllers deployed in factory automation environments with wide temperature (-40°C to +85°C) and EMI exposure. IC Role / Device Role / Timing Role: Nonvolatile program memory mapped into MCU address space; executes directly from flash (XIP-capable) with 90 ns access supporting deterministic scan-cycle timing. Use Value: 100,000-cycle endurance enables quarterly firmware patches over 10+ years; 1.65–1.95 V operation simplifies power design alongside 1.8 V FPGAs and microcontrollers. |
Use Scenario: Holding certified bootloader and diagnostic firmware in portable ultrasound and infusion pumps requiring regulatory-compliant data integrity and field update capability. IC Role / Device Role / Timing Role: Secure boot memory with hardware/software write protection; stores signed firmware images validated prior to execution. Use Value: >100-year data retention satisfies FDA long-term device lifecycle requirements; sector-erase allows safe patching of non-critical modules without affecting certified bootloader region. |
| Automotive Telematics Module | Smart Energy Meter Firmware |
|
Use Scenario: Storing OTA-updatable communication stack (LTE/CAN gateway) and vehicle configuration profiles in telematics control units operating under automotive temperature and vibration stress. IC Role / Device Role / Timing Role: Dual-bank configurable flash memory; one bank active while other receives update via CAN FD, then atomic swap on reset. Use Value: Block-erase (32 KWord) enables fast firmware partition switching; SuperFlash reliability ensures zero field failures due to write corruption during ignition cycling. |
Use Scenario: Retaining metrology firmware, tariff tables, and cryptographic keys in ANSI C12.22-compliant smart meters deployed in utility substations with 15+ year service life. IC Role / Device Role / Timing Role: High-reliability configuration store; holds AES-256 keys and calibration constants written once at factory and rarely modified. Use Value: 1 µA standby current extends battery backup runtime during grid outages; >100-year retention eliminates key rotation or reprogramming maintenance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MX29LV400CBTI-90G | 3.0 V supply (2.7–3.6 V), 48-pin TSOP; 90 ns access but higher VDD increases system power and requires level-shifting with 1.8 V SoCs. | Lacks 1.8 V native operation and SuperFlash timing stability; suitable only where legacy 3 V infrastructure exists. | Select only if board already uses 3 V rail and TSOP footprint; not recommended for new 1.8 V designs. |
| S29GL032N90TFIR20 | 3 V supply, 64-ball BGA; includes ECC and wider temperature range (-40°C to +105°C), but 90 ns access applies only at 3.0 V-not at 2.7 V. | Targeted at automotive infotainment with ECC; over-specified for industrial firmware storage and incompatible with 1.8 V logic. | Choose only when ECC and extended temperature are mandatory; otherwise, SST39WF400A-90-4I-B3KE-T offers better power/performance fit. |
Compared with MX29LV400CBTI-90G and S29GL032N90TFIR20, the SST39WF400A-90-4I-B3KE-T uniquely delivers guaranteed 90 ns access at 1.8 V, fixed-program timing across endurance life, and native JEDEC x16 compatibility-reducing BOM count, eliminating level shifters, and simplifying firmware validation.
Availability
SST39WF400A-90-4I-B3KE-T is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device bootloader memory, and smart energy meter firmware requiring stable component supply, long-lifecycle assurance, and RoHS-compliant packaging.
Supply support for SST39WF400A-90-4I-B3KE-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
Silicon Storage Technology (SST), acquired by Microchip Technology in 2010, specialized in high-reliability NOR flash using proprietary SuperFlash technology for embedded systems.
The SST39WF400A product line was engineered for low-voltage, high-endurance firmware storage in space-constrained industrial and portable electronics-prioritizing timing stability, data retention, and JEDEC interoperability over raw density.
FAQ
What is the guaranteed read access time for SST39WF400A-90-4I-B3KE-T, and under what voltage conditions?
The SST39WF400A-90-4I-B3KE-T guarantees 90 ns read access time when operated within the 1.70–1.95 V supply range. Operation below 1.70 V (e.g., at 1.65 V) is permitted only for the -100 variant; using the -90 suffix part outside its specified voltage window may result in timing violations or functional failure. This constraint is explicitly defined in Table 12 of the datasheet.
Does SST39WF400A-90-4I-B3KE-T require an external VPP voltage for programming or erasing?
No, the SST39WF400A-90-4I-B3KE-T integrates an internal charge pump that generates all necessary high-voltage programming and erase potentials from the single 1.65–1.95 V VDD supply. No external VPP pin or auxiliary voltage source is required-confirmed by "VPP min/max = 00H" in CFI Table 6 and "Internal VPP generation" in the Features list.
How does the SST39WF400A-90-4I-B3KE-T indicate completion of a Word-Program or Erase operation?
The SST39WF400A-90-4I-B3KE-T provides two software-detectable status mechanisms: DQ6 (Toggle Bit) toggles between 0 and 1 during internal operations and stops upon completion; DQ7 (Data# Polling) returns complemented data during writes and true data after completion. Both are valid after the fourth (program) or sixth (erase) WE# pulse rising edge-no hardware BUSY signal is provided.
What package type is used for SST39WF400A-90-4I-B3KE-T, and is it RoHS-compliant?
The SST39WF400A-90-4I-B3KE-T uses a 48-ball Thin Fine-Pitch Ball Grid Array (TFBGA) measuring 6 mm × 8 mm, as confirmed in Figure 2 and Table 2 of the datasheet. It is RoHS-compliant and lead-free, with moisture sensitivity level 3 (MSL3), requiring bake conditioning before reflow if exposed beyond floor life.
Can SST39WF400A-90-4I-B3KE-T be used in systems requiring more than 100,000 program/erase cycles?
The SST39WF400A-90-4I-B3KE-T is rated for 100,000 cycles (typical) per JEDEC A117, with minimum qualification at 10,000 cycles. For applications demanding higher endurance, system-level wear leveling or alternative technologies (e.g., EEPROM or FRAM) should be evaluated-this part does not guarantee operation beyond its specified endurance limit.
SST39WF400A-90-4I-B3KE-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- SST39 MPF™
- Package/Case:
- 48-TFBGA
- Packaging:
- Tape & Reel (TR)
- 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:
- 40µs
- Access Time:
- 90 ns
- Voltage - Supply:
- 1.65V ~ 1.95V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-TFBGA
SST39WF400A-90-4I-B3KE-T FAQ
1.How can I place an order for SST39WF400A-90-4I-B3KE-T through Aetrix?
Please submit a Request for Quotation (RFQ) for SST39WF400A-90-4I-B3KE-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 SST39WF400A-90-4I-B3KE-T reliable?
The price and inventory of SST39WF400A-90-4I-B3KE-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SST39WF400A-90-4I-B3KE-T is usually 5 days.
3.What payment methods are accepted for SST39WF400A-90-4I-B3KE-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST39WF400A-90-4I-B3KE-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST39WF400A-90-4I-B3KE-T?
SST39WF400A-90-4I-B3KE-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST39WF400A-90-4I-B3KE-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 SST39WF400A-90-4I-B3KE-T?
For technical support, including SST39WF400A-90-4I-B3KE-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SST39WF400A-90-4I-B3KE-T requirements.
6.How does Aetrix verify that SST39WF400A-90-4I-B3KE-T is sourced from the original manufacturer or authorized distributors?
All SST39WF400A-90-4I-B3KE-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 SST39WF400A-90-4I-B3KE-T meets industry standards.
7.What is the process for return or replacement of SST39WF400A-90-4I-B3KE-T?
All SST39WF400A-90-4I-B3KE-T units undergo pre-shipment inspection (PSI). If there is an issue with SST39WF400A-90-4I-B3KE-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 SST39WF400A-90-4I-B3KE-T part is unused and in its original packaging.
Return procedure for SST39WF400A-90-4I-B3KE-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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