My Inquiry
My Account
Microchip Technology SST39WF400A-90-4I-ZKE
- Part No.:
- SST39WF400A-90-4I-ZKE
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 48-VFBGA
- Datasheet:
-
SST39WF400A-90-4I-ZKE.pdf
- Description:
- IC FLASH 4MBIT PARALLEL 48CSP
- Quantity:
- Payment:
- Shipping:
Inventory:1,319
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SST39WF400A-90-4I-ZKE from Silicon Storage Technology is a 4 Mbit (256K × 16) single-supply Multi-Purpose Flash memory IC with 1.65–1.95 V operation, 90 ns read access time, and SuperFlash technology enabling 100,000 program/erase cycles and >100 years data retention. It serves as nonvolatile program/data storage in embedded controllers requiring low-voltage, sector/block-erasable flash with JEDEC-standard x16 interface.
For engineers reviewing the SST39WF400A-90-4I-ZKE datasheet, SST39WF400A-90-4I-ZKE pinout, SST39WF400A-90-4I-ZKE application, or SST39WF400A-90-4I-ZKE equivalent, this page delivers verified technical context, JEDEC-compliant timing behavior, SuperFlash-specific endurance and energy efficiency metrics, and validated Z-Scale BGA package integration details - all confirmed for the exact -90 speed grade and industrial temperature grade (-40°C to +85°C).
Technical Context
The SST39WF400A-90-4I-ZKE implements an asynchronous x16 parallel interface with CE#, OE#, and WE# control signals, supporting standard microprocessor bus protocols. Its split-gate SuperFlash cell architecture enables fixed 28 µs word-program and 36 ms sector/block-erase times independent of cycle count - eliminating software de-rating required by conventional flash.
It integrates on-chip hardware write inhibition (VDD power-up/down detection, noise/glitch protection) and JEDEC-compliant Software Data Protection (SDP) with three-byte program and six-byte erase command sequences. CFI Query mode (0x98 entry) provides standardized device identification and geometry reporting at known address offsets.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 256K × 16 = 4 Mbit; supports byte-wide addressing via DQ15–DQ0 with AMS = A17 |
| Read Access Time | 90 ns (guaranteed at VDD = 1.70–1.95 V); defines minimum read cycle time TRC for timing-critical boot code fetch |
| Supply Voltage Range | 1.65–1.95 V; enables direct interfacing with 1.8 V logic systems without level shifters |
| Endurance | 100,000 program/erase cycles (typical); qualified per JEDEC A117, enabling field firmware updates over product lifetime |
| Data Retention | >100 years at Tj ≤ 85°C; meets long-life requirements for industrial control and medical firmware storage |
| Word-Program Time | 28 µs typical; internal timing eliminates external wait-state generation during firmware patching |
| Sector/Block Erase | Uniform 2 KWord sectors (4 KB) and 32 KWord blocks (64 KB); enables granular firmware partitioning and recovery |
Pinout & Package
Package: 48-ball XFBGA Z-Scale (4 mm × 6 mm), RoHS-compliant, bottom-side ball layout per Figure 4. Pin mapping matches JEDEC-standard x16 flash pinouts.
| 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 I/O | Bi-directional x16 data bus; tri-stated when CE# or OE# high; latched on WE#/CE# edges per JEDEC timing |
| CE# | Chip Enable | Active-low device selection; must be low for read/write; high-Z output state when asserted high |
| OE# | Output Enable | Active-low output gating; controls DQ bus drive during read; ignored during write/erase |
| WE# | Write Enable | Active-low control for write latching and command sequencing; used with CE# for WE#- or CE#-controlled operations |
| VDD | Power Supply | 1.65–1.95 V core supply; powers internal charge pump for erase/program; decoupling required per layout guidelines |
| VSS | Ground | Reference for all I/O and core logic; requires low-inductance connection to PCB ground plane |
| NC | No Connection | Unbonded balls (e.g., A1, A2, A3, A5, A7, A9, A10, A11, A12, A13, A14, A15, A16, DQ1, DQ2, DQ3, DQ4, DQ5, DQ6, DQ7, DQ11, DQ12, DQ13, DQ14, DQ15); must remain unconnected |
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 - no software timing margining required |
| JEDEC-Compliant Interface | Pinout and command set fully compatible with industry-standard x16 flash memories, enabling drop-in replacement in existing 16-bit bus designs |
| Multi-Level Erase Granularity | Independent 4 KB sector and 64 KB block erase modes allow selective firmware update without full chip erase - reducing update time and wear |
| Hardware + Software Write Protection | VDD monitoring, glitch filtering, and mandatory 3-byte (program) / 6-byte (erase) SDP command sequences prevent accidental writes during power transitions |
| CFI Query Support | Standardized CFI table (entry via 0x98 at 0x5555) provides runtime-accessible geometry, timing, and voltage parameters - simplifying bootloader portability |
Applications
| Industrial PLC Firmware Storage | Medical Device Configuration Memory |
|---|---|
Use Scenario: Storing and updating ladder logic firmware in programmable logic controllers operating in harsh factory environments. IC Role / Device Role / Timing Role: Nonvolatile program memory mapped into CPU address space; accessed via 16-bit parallel bus during boot and runtime firmware patches. Use Value: 100,000-cycle endurance and >100-year retention ensure reliable operation over 15+ year equipment lifetimes without field replacement. |
Use Scenario: Holding calibrated sensor coefficients and regulatory-compliant configuration profiles in portable diagnostic equipment. IC Role / Device Role / Timing Role: Secure, tamper-resistant configuration store; write-protected via SDP and VDD monitoring to prevent corruption during battery swaps. Use Value: Sector-erase capability allows safe re-calibration without erasing patient history or safety-critical boot code. |
| Automotive Infotainment Bootloader | Networking Equipment Feature License Storage |
Use Scenario: Hosting secure bootloader code in automotive head units requiring AEC-Q100-compliant components and fast boot times. IC Role / Device Role / Timing Role: Primary boot memory accessed at power-on reset; 90 ns read latency minimizes boot delay under 1.8 V supply. Use Value: Z-Scale XFBGA package (4 mm × 6 mm) enables compact placement near SoC; industrial temp grade ensures reliability at under-hood temperatures. |
Use Scenario: Storing encrypted feature-enable keys and subscription-based service licenses in enterprise switches and routers. IC Role / Device Role / Timing Role: Secure nonvolatile key repository; accessed only during license validation; protected by hardware write inhibit and SDP. Use Value: Block-erase granularity permits license revocation and reissuance without affecting core firmware or MAC tables. |
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 | 3.0 V supply (2.7–3.6 V), 48-pin TSOP; lacks Z-Scale BGA; slower 100 ns read; 100K cycles same | Requires level-shifting for 1.8 V systems; larger footprint; not suitable for ultra-compact layouts | Select only if legacy 3 V design compatibility or TSOP socket reuse is required |
| S29GL032N90TFI020 | 3.0 V supply, 56-ball BGA; 32 Mbit density; supports CFI and unlock-bypass; 90 ns read same | Higher density but incompatible voltage and pinout; not a drop-in replacement | Consider for new designs needing higher capacity and future scalability, not for SST39WF400A-90-4I-ZKE replacement |
Compared with MX29LV400CTTI-90G and S29GL032N90TFI020, the SST39WF400A-90-4I-ZKE uniquely delivers 1.8 V operation in a 4 mm × 6 mm Z-Scale package with fixed-timing SuperFlash - making it optimal for space-constrained, low-power embedded systems where voltage compatibility and endurance consistency are critical.
Availability
SST39WF400A-90-4I-ZKE is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device configuration memory, automotive infotainment bootloaders, and networking equipment license storage requiring stable component supply across extended product lifecycles.
Supply support for SST39WF400A-90-4I-ZKE 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) was a fabless semiconductor company specializing in high-reliability, low-voltage flash memory solutions before its acquisition by Microchip Technology in 2010. SST pioneered SuperFlash technology for embedded nonvolatile memory.
The SST39WF400A product line was designed for cost-sensitive, space-constrained embedded systems requiring robust, single-supply flash with JEDEC compatibility and long-term data integrity - particularly in industrial, medical, and automotive applications.
FAQ
What is the operating voltage range for the SST39WF400A-90-4I-ZKE?
The SST39WF400A-90-4I-ZKE operates from 1.65 V to 1.95 V, with guaranteed 90 ns read access only within the 1.70–1.95 V sub-range. This 1.8 V nominal supply enables direct integration with modern low-power microcontrollers and SoCs without level-shifting circuitry. The device includes on-chip VDD monitoring to inhibit writes below 1.0 V, ensuring data integrity during brown-out conditions.
Does the SST39WF400A-90-4I-ZKE support both sector and block erase modes?
Yes, the SST39WF400A-90-4I-ZKE supports both uniform 2 KWord (4 KB) sector erase and 32 KWord (64 KB) block erase, initiated via distinct six-byte command sequences. Sector erase targets individual 4 KB regions using AMS–A11 address lines, while block erase uses AMS–A15. Both complete in 36 ms typical, enabling flexible firmware partitioning and minimizing unnecessary wear on unrelated memory regions during updates.
How is write completion detected on the SST39WF400A-90-4I-ZKE?
The SST39WF400A-90-4I-ZKE provides two hardware-supported methods: Data# Polling (DQ7 toggles complement/data state) and Toggle Bit (DQ6 toggles between 1 and 0 during operation). Both become valid after the fourth WE#/CE# pulse for programming and sixth pulse for erase. These status bits eliminate need for fixed delay loops, allowing host processors to perform other tasks while waiting for write completion.
What package type does the SST39WF400A-90-4I-ZKE use?
The SST39WF400A-90-4I-ZKE uses a 48-ball XFBGA Z-Scale package measuring 4 mm × 6 mm, as specified in the "ZKE" suffix. This ultra-compact, bottom-terminal BGA variant is optimized for high-density PCB layouts and complies with JEDEC MO-245 standards. Pin assignments match Figures 2–4 in the datasheet, with NC balls clearly identified to prevent misrouting.
Is CFI Query supported on the SST39WF400A-90-4I-ZKE?
Yes, the SST39WF400A-90-4I-ZKE implements Common Flash Interface (CFI) Query mode, entered by writing 0x98 to address 0x5555. Once active, CFI data at addresses 0x10–0x34 provides standardized access to device geometry (e.g., 512 KB size, x16 interface), timing parameters (e.g., 90 ns read), and voltage ranges - enabling portable bootloader implementations across flash vendors.
SST39WF400A-90-4I-ZKE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- SST39 MPF™
- Package/Case:
- 48-VFBGA
- 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-CSP
SST39WF400A-90-4I-ZKE FAQ
1.How can I place an order for SST39WF400A-90-4I-ZKE through Aetrix?
Please submit a Request for Quotation (RFQ) for SST39WF400A-90-4I-ZKE 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-ZKE reliable?
The price and inventory of SST39WF400A-90-4I-ZKE 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-ZKE is usually 5 days.
3.What payment methods are accepted for SST39WF400A-90-4I-ZKE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST39WF400A-90-4I-ZKE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST39WF400A-90-4I-ZKE?
SST39WF400A-90-4I-ZKE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST39WF400A-90-4I-ZKE 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-ZKE?
For technical support, including SST39WF400A-90-4I-ZKE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SST39WF400A-90-4I-ZKE requirements.
6.How does Aetrix verify that SST39WF400A-90-4I-ZKE is sourced from the original manufacturer or authorized distributors?
All SST39WF400A-90-4I-ZKE 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-ZKE meets industry standards.
7.What is the process for return or replacement of SST39WF400A-90-4I-ZKE?
All SST39WF400A-90-4I-ZKE units undergo pre-shipment inspection (PSI). If there is an issue with SST39WF400A-90-4I-ZKE, 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-ZKE part is unused and in its original packaging.
Return procedure for SST39WF400A-90-4I-ZKE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SST39WF400A-90-4I-ZKE 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…
