My Inquiry
My Account
Microchip Technology SST39WF400A-90-4I-M1QE
- Part No.:
- SST39WF400A-90-4I-M1QE
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 48-WFBGA
- Datasheet:
-
SST39WF400A-90-4I-M1QE.pdf
- Description:
- IC FLASH 4MBIT PARALLEL 48WFBGA
- Quantity:
- Payment:
- Shipping:
Inventory:2,724
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SST39WF400A-90-4I-M1QE from Silicon Storage Technology, Inc. is a 4 Mbit (256K × 16) single-supply Multi-Purpose Flash memory IC designed for embedded program/data storage in space-constrained industrial systems. It operates at 1.65–1.95 V, delivers 90 ns read access time, supports sector/block/chip erase, and features SuperFlash technology with 100,000 write/erase cycles and >100-year data retention. It is used in firmware update storage for network edge controllers.
For engineers reviewing the SST39WF400A-90-4I-M1QE datasheet, SST39WF400A-90-4I-M1QE pinout, SST39WF400A-90-4I-M1QE application, or SST39WF400A-90-4I-M1QE equivalent, this page provides verified functional identity, JEDEC-compliant x16 asynchronous interface timing, hardware/software data protection schemes, and validated alternative flash parts for migration planning.
Technical Context
The SST39WF400A-90-4I-M1QE implements an x16 asynchronous parallel interface with CE#, OE#, and WE# control signals, latched address/data buses, and JEDEC-standard command sets. Its SuperFlash split-gate cell enables fixed 28 µs word-program and 36 ms sector/block-erase times independent of wear level.
It integrates on-chip VPP generation, Toggle Bit (DQ6) and Data# Polling (DQ7) for end-of-write detection, and dual-layer data protection: hardware-level noise/glitch immunity and software-based three-/six-byte command sequences compliant with JEDEC SDP.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 4 Mbit (256K × 16), enabling 512 KB of nonvolatile storage for boot code and configuration tables |
| Read Access Time | 90 ns at 1.70–1.95 V - guarantees deterministic timing for real-time firmware fetch in microcontroller host systems |
| Supply Voltage | 1.65–1.95 V - compatible with low-voltage SoC I/O domains and eliminates need for external level shifters |
| Endurance | 100,000 program/erase cycles - supports field-updatable firmware with multi-year service life under frequent patching |
| Data Retention | >100 years at 85°C - ensures long-term reliability in unattended industrial deployments without refresh |
| Erase Granularity | Uniform 2 KWord sectors (4 KB) and 32 KWord blocks (64 KB) - enables selective firmware module updates without full chip erase |
| Write Detection | Toggle Bit (DQ6) and Data# Polling (DQ7) - allows host CPU to poll status without dedicated interrupt lines or timers |
Pinout & Package
Package: 48-ball TFBGA (6 mm × 8 mm), RoHS-compliant, industrial-grade (-40°C to +85°C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | A0–A16 select 256K words; A17 = AMS (most significant address) used for sector/block address decoding |
| DQ0–DQ15 | Data I/O Bus | x16 bidirectional bus; tri-stated when CE# or OE# is high; latched on rising edge of WE#/CE# |
| CE# | Chip Enable | Active-low device selection; must be low for read/write; high-Z output and standby current (1 µA typ.) when high |
| OE# | Output Enable | Active-low output gating; controls DQ bus drive; no effect on internal operations when high |
| WE# | Write Enable | Controls write latching and command execution timing; falling edge latches address, rising edge initiates internal operation |
| VDD | Power Supply | 1.65–1.95 V core supply; powers all logic and SuperFlash array; internal charge pump generates programming voltage |
| VSS | Ground | 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, A3 in TFBGA layout); must be left floating or tied to VSS per layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| SuperFlash Technology | Split-gate cell with thick-oxide tunneling injector enables fixed 28 µs program and 36 ms erase times across full endurance life |
| JEDEC-Compliant Interface | Standard x16 pinout and command set (e.g., 5555H/2AAAH/A0H for program) ensures drop-in compatibility with legacy flash designs |
| Hardware Data Protection | Glitch immunity (<5 ns pulses ignored), VDD power-up/down detection (<1.0 V inhibits writes), and write-inhibit mode via CE#/OE#/WE# states |
| Software Data Protection | Three-byte sequence required for program; six-byte sequence for erase - prevents accidental writes during reset or brownout |
| CFI Query Support | Standard CFI entry (5555H/2AAAH/98H) returns device geometry, timing, and voltage parameters for runtime configuration discovery |
Applications
| Industrial PLC Firmware Storage | Medical Device Configuration Memory |
|---|---|
|
Use Scenario: Storing and updating ladder logic firmware in programmable logic controllers deployed in factory automation environments. IC Role / Device Role / Timing Role: Nonvolatile program memory mapped to microcontroller address space; accessed via parallel x16 bus with 90 ns read latency. Use Value: Sector-erase capability enables incremental firmware patches without full reflash, reducing downtime during maintenance windows. |
Use Scenario: Holding calibrated sensor offsets, user preferences, and regulatory compliance settings in portable diagnostic equipment. IC Role / Device Role / Timing Role: Configuration EEPROM replacement; retains critical settings across power cycles with >100-year data retention. Use Value: 1.65–1.95 V operation matches low-power MCU I/O rails, eliminating level-shifting components and board area. |
| Network Edge Router Boot Image | Automotive Telematics Module Code Storage |
|
Use Scenario: Hosting bootloader and secure boot images in carrier-grade edge routers requiring remote firmware validation and rollback. IC Role / Device Role / Timing Role: Primary boot memory accessed at power-on; supports CFI queries for dynamic image size and checksum validation. Use Value: Chip-erase (140 ms typ.) and block-erase (36 ms typ.) enable fast recovery from corrupted images during OTA updates. |
Use Scenario: Storing vehicle-specific calibration maps and over-the-air update staging buffers in automotive infotainment and telematics ECUs. IC Role / Device Role / Timing Role: High-reliability code storage operating across -40°C to +85°C ambient; withstands automotive power cycling stress. Use Value: 100,000-cycle endurance supports frequent map updates over 15-year vehicle lifetime without wear leveling overhead. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MX29LV400CTTI-90G | 4 Mbit x16, 3.0 V supply, 90 ns access, no internal VPP generation - requires external 12 V programming voltage | Not suitable for 1.8 V-only systems; higher system BOM cost due to charge pump IC and voltage routing | Select only if existing 3.0 V infrastructure exists and voltage margin allows 12 V generation |
| S29GL032N90TFIR20 | 32 Mbit x16, 3.0 V, 90 ns, supports burst reads and write buffering - larger density but incompatible voltage and command set | Requires host firmware rewrite; unsuitable for footprint- or voltage-constrained replacements | Consider for new designs needing higher density and advanced features, not for direct SST39WF400A-90-4I-M1QE replacement |
Compared with MX29LV400CTTI-90G and S29GL032N90TFIR20, the SST39WF400A-90-4I-M1QE uniquely delivers 1.8 V operation with integrated VPP, fixed erase times, and JEDEC SDP compliance - making it the only viable option for compact, low-power industrial firmware storage where voltage headroom and wear consistency are critical.
Availability
SST39WF400A-90-4I-M1QE is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device configuration memory, and network edge router boot image hosting requiring stable component supply across extended product lifecycles.
Supply support for SST39WF400A-90-4I-M1QE 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, Inc. (SST) was a fabless semiconductor company specializing in high-reliability nonvolatile memory solutions, acquired by Microchip Technology in 2010. Known for SuperFlash technology and embedded flash IP licensing.
The SST39WF400A product line targets cost-sensitive, low-voltage embedded systems requiring robust firmware and configuration storage without external high-voltage circuitry or complex wear-leveling firmware.
FAQ
What is the guaranteed operating temperature range for the SST39WF400A-90-4I-M1QE?
The SST39WF400A-90-4I-M1QE is rated for industrial operation from –40°C to +85°C. This is confirmed in the "Operating Range" table of the official EOL datasheet (S71220-07-EOL), where the "I" suffix in the part number explicitly denotes industrial grade qualification. The device maintains full specification compliance-including 90 ns read access and 1.65–1.95 V supply-across this full range.
Does the SST39WF400A-90-4I-M1QE require an external VPP voltage for programming?
No, the SST39WF400A-90-4I-M1QE does not require an external VPP voltage. Its SuperFlash architecture includes an on-chip charge pump that generates the necessary high voltage internally from the 1.65–1.95 V VDD supply. This is explicitly stated in the "Automatic Write Timing" feature list and confirmed in Table 6 (VPP min/max = 0000H), eliminating the need for external high-voltage circuitry.
How many erase sectors and blocks does the SST39WF400A-90-4I-M1QE contain?
The SST39WF400A-90-4I-M1QE contains 128 uniform sectors of 2 KWords (4 KB each) and 8 uniform blocks of 32 KWords (64 KB each). This is derived from Table 7 (Device Geometry Information): sector count = 007FH + 1 = 128; block count = 0007H + 1 = 8. Total capacity remains 256K × 16 = 4 Mbit.
Is the SST39WF400A-90-4I-M1QE pin-compatible with standard JEDEC x16 flash devices?
Yes, the SST39WF400A-90-4I-M1QE conforms to JEDEC standard pin assignments and command sets for x16 parallel flash memories. Its pinout (A0–A17, DQ0–DQ15, CE#, OE#, WE#, VDD, VSS) matches industry-standard 48-ball BGA footprints, and its command sequences (e.g., 5555H/2AAAH/A0H) align with JEDEC-approved Software Data Protection protocols.
What methods does the SST39WF400A-90-4I-M1QE provide to detect completion of program or erase operations?
The SST39WF400A-90-4I-M1QE provides two hardware-supported software polling methods: Data# Polling (DQ7), which toggles between complement and true data until completion, and Toggle Bit (DQ6), which alternates logic states during operation and stabilizes upon finish. Both are valid after the fourth (program) or sixth (erase) WE#/CE# pulse, as defined in the "Write Operation Status Detection" section.
SST39WF400A-90-4I-M1QE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- SST39 MPF™
- Package/Case:
- 48-WFBGA
- 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:
- 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-WFBGA (6x4)
SST39WF400A-90-4I-M1QE FAQ
1.How can I place an order for SST39WF400A-90-4I-M1QE through Aetrix?
Please submit a Request for Quotation (RFQ) for SST39WF400A-90-4I-M1QE 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-M1QE reliable?
The price and inventory of SST39WF400A-90-4I-M1QE 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-M1QE is usually 5 days.
3.What payment methods are accepted for SST39WF400A-90-4I-M1QE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST39WF400A-90-4I-M1QE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST39WF400A-90-4I-M1QE?
SST39WF400A-90-4I-M1QE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST39WF400A-90-4I-M1QE 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-M1QE?
For technical support, including SST39WF400A-90-4I-M1QE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SST39WF400A-90-4I-M1QE requirements.
6.How does Aetrix verify that SST39WF400A-90-4I-M1QE is sourced from the original manufacturer or authorized distributors?
All SST39WF400A-90-4I-M1QE 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-M1QE meets industry standards.
7.What is the process for return or replacement of SST39WF400A-90-4I-M1QE?
All SST39WF400A-90-4I-M1QE units undergo pre-shipment inspection (PSI). If there is an issue with SST39WF400A-90-4I-M1QE, 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-M1QE part is unused and in its original packaging.
Return procedure for SST39WF400A-90-4I-M1QE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SST39WF400A-90-4I-M1QE Tags
-
M24C02-WMN6TP
STMicroelectronics
-
AT24C02C-XHM-T
Microchip Technology
-
AT21CS01-STUM10-T
Microchip Technology
-
AT24C02C-SSHM-T
Microchip Technology
-
24LC01BT-I/OT
Microchip Technology
-
M24C02-FMC6TG
STMicroelectronics
-
AT24CS02-SSHM-T
Microchip Technology
-
93LC46BT-I/OT
Microchip Technology
-
AT24C04C-SSHM-T
Microchip Technology
-
24LC01BT-I/SN
Microchip Technology
-
24AA02UIDT-I/OT
Microchip Technology
-
AT24C08C-STUM-T
Microchip Technology
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
