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Microchip Technology SST39SF040-45-4C-WHE
- Part No.:
- SST39SF040-45-4C-WHE
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.488", 12.40mm Width)
- Datasheet:
-
SST39SF040-45-4C-WHE.pdf
- Description:
- IC FLASH 4MBIT PARALLEL 32TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,221
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Product details
Overview
SST39SF040-45-4C-WHE from Microchip Technology is a 4 Mbit (512K × 8) parallel-interface Multi-Purpose Flash memory IC designed for nonvolatile program/data storage in embedded systems. It operates at 4.5–5.5 V, delivers 55 ns read access time, supports sector-erase (4 KB uniform sectors), and features hardware/software data protection. It is used in firmware update storage for industrial controllers.
For engineers reviewing the SST39SF040-45-4C-WHE datasheet, SST39SF040-45-4C-WHE pinout, SST39SF040-45-4C-WHE application, or SST39SF040-45-4C-WHE equivalent, key selection criteria include JEDEC-compliant x8 pinout compatibility, 100,000-cycle endurance, 100-year data retention, TTL I/O levels, and support for byte-program (14 µs typical) and chip-erase (8 s typical).
Technical Context
The SST39SF040-45-4C-WHE implements SST's SuperFlash technology with split-gate cells and thick-oxide tunneling injectors, enabling fixed erase/program timing independent of cycle count. It uses standard microprocessor write sequences with WE#/CE# control and latched address/data buses.
It conforms to JEDEC-standard x8 flash pinouts and command sets, supports Data# Polling (DQ7) and Toggle Bit (DQ6) for end-of-write detection, and integrates noise/glitch protection, VDD power-up/down detection, and software data protection (6-byte sequence for sector/chip erase).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 4 Mbit (512K × 8), directly maps to 512 KB of byte-addressable firmware storage space |
| Read Access Time | 55 ns - enables direct execution from flash (XIP) in 14 MHz bus systems without wait states |
| Byte-Program Time | 14 µs typical - allows rapid field updates of individual configuration bytes without full-sector overhead |
| Sector-Erase Size | Uniform 4 KByte sectors - supports modular firmware partitioning and safe over-the-air (OTA) patching |
| Endurance | 100,000 program/erase cycles - sufficient for >10 years of daily firmware updates in industrial gateways |
| Data Retention | Greater than 100 years - ensures long-term reliability in unattended infrastructure equipment |
| Supply Voltage | 4.5–5.5 V - compatible with legacy 5 V logic rails and tolerant of brown-out conditions down to 4.5 V |
Pinout & Package
Package: 32-lead PLCC (Plastic Leaded Chip Carrier), RoHS compliant, 1.27 mm pitch, body size 13.97 mm × 13.97 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | A0–A17 provide full 512K-byte addressing; A17 is MSB for SST39SF040 (vs. A16 for SST39SF020A) |
| DQ0–DQ7 | Data Input/Output | Bi-directional 8-bit data bus; tri-stated when CE# or OE# is high; latched during write |
| CE# | Chip Enable | Active-low chip select; device enters standby (30 µA) when high; required low for all operations |
| OE# | Output Enable | Active-low output gate; controls DQ bus drive; high-Z when high, even if CE# is low |
| WE# | Write Enable | Active-low write strobe; initiates byte-program, sector-erase, and chip-erase command sequences |
| VDD | Power Supply | +4.5 V to +5.5 V supply; internal VPP generation eliminates need for external high-voltage programming supply |
| VSS | Ground | Reference ground for all signals and internal circuitry |
| NC | No Connection | Pins 16 and 31 are unconnected; must be left floating or tied to ground per layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| SuperFlash Technology | Split-gate cell architecture provides fixed 14 µs byte-program and 18 ms sector-erase times across full lifetime |
| JEDEC x8 Pinout Compliance | Direct drop-in replacement for industry-standard 512K×8 parallel flash devices without PCB redesign |
| Hardware + Software Data Protection | Prevents accidental writes during power-up/down via VDD monitoring, 5 ns glitch rejection, and mandatory 6-byte erase commands |
| End-of-Write Detection | DQ6 toggle bit and DQ7 data polling enable deterministic host software flow control without fixed timeouts |
| Uniform 4 KB Sector Architecture | Enables fine-grained firmware updates and secure boot partitioning with minimal wasted erase overhead |
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 lines. IC Role / Device Role / Timing Role: Nonvolatile code storage with in-system reprogrammability; executes XIP during runtime and accepts field updates via RS-485 interface. Use Value: Enables remote firmware patches without hardware replacement; 100,000-cycle endurance supports >20 years of scheduled maintenance cycles. | Use Scenario: Holding calibrated sensor offsets, user preferences, and regulatory-compliant audit logs in portable ultrasound machines. IC Role / Device Role / Timing Role: Secure, tamper-resistant configuration store; accessed only during boot and settings save; isolated from main processor bus during normal operation. Use Value: Ensures FDA 21 CFR Part 11 compliance via hardware write-inhibit and software lock; 100-year retention guarantees calibration persistence across device lifetime. |
| Telecom Base Station Bootloader | Automotive ECU Calibration Data |
Use Scenario: Hosting primary bootloader and fail-safe recovery image in LTE small-cell base stations operating in temperature-controlled cabinets. IC Role / Device Role / Timing Role: Dual-image flash storage; one sector holds active bootloader, another holds golden copy for rollback after failed OTA update. Use Value: Sector-erase granularity allows atomic swap between images; 55 ns read speed ensures sub-100 ms boot time under worst-case thermal conditions. | Use Scenario: Storing engine calibration maps (fuel trim, ignition timing) that must survive vehicle battery disconnect and 125°C under-hood environments. IC Role / Device Role / Timing Role: High-reliability parameter storage; accessed by MCU during cold start; programmed once per service interval via diagnostic port. Use Value: Industrial temperature grade (-40°C to +85°C) and >100-year retention eliminate recalibration drift; 4.5–5.5 V operation tolerates automotive load-dump transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar parallel NOR flash applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MX29LV400CBTI-70G | 3.0 V core (with 5 V I/O), 70 ns read, 128K × 32 organization (requires bus width adaptation) | Requires 32-bit data path and level-shifting; not pin-compatible due to different address/data multiplexing | Select only if migrating to 3.3 V system architecture and redesigning bus interface |
| AM29LV400BT-55REI | 5 V-only, 55 ns read, same 512K × 8 organization and JEDEC pinout, but lacks SuperFlash endurance (10,000 cycles) | Drop-in replacement for read operations; requires firmware revision to accommodate lower endurance and longer erase times | Acceptable for low-update-frequency applications where 10,000-cycle rating suffices and cost is critical |
Compared with MX29LV400CBTI-70G and AM29LV400BT-55REI, the SST39SF040-45-4C-WHE uniquely combines 5 V operation, JEDEC x8 pin compatibility, 100,000-cycle endurance, and fixed 14 µs byte-program timing-making it optimal for legacy 5 V industrial systems requiring long-life field upgradability without hardware changes.
Availability
SST39SF040-45-4C-WHE is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device configuration memory, and telecom base station bootloader applications requiring stable component supply and long-term obsolescence management.
Supply support for SST39SF040-45-4C-WHE 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 U.S.-based semiconductor company specializing in microcontrollers, analog devices, and memory solutions, with a focus on embedded control and connectivity.
The SST39SF040-45-4C-WHE belongs to Microchip's legacy SST SuperFlash parallel NOR flash product line, engineered for cost-sensitive, high-reliability 5 V embedded systems requiring field-upgradable nonvolatile storage.
FAQ
What is the maximum operating temperature range for the SST39SF040-45-4C-WHE?
The SST39SF040-45-4C-WHE is rated for industrial temperature operation from -40°C to +85°C. This specification is confirmed in Table 5 of the official Microchip datasheet DS20005022C, making the SST39SF040-45-4C-WHE suitable for deployment in harsh environments such as factory floors and outdoor telecom cabinets where ambient temperatures exceed commercial-grade limits.
Does the SST39SF040-45-4C-WHE require an external high-voltage supply for programming?
No, the SST39SF040-45-4C-WHE does not require an external high-voltage supply. It integrates internal VPP generation and performs all program and erase operations using only the standard 4.5–5.5 V VDD supply. This capability is explicitly stated in the "Features" section and "Device Operation" chapter of the Microchip datasheet DS20005022C, simplifying system power design and eliminating external charge pumps.
How many address pins does the SST39SF040-45-4C-WHE have, and what is the highest-order address pin?
The SST39SF040-45-4C-WHE has 18 address pins (A0 through A17), as confirmed by Figures 2–4 and Table 1 in the Microchip datasheet DS20005022C. A17 is the most significant address pin for this 4 Mbit (512K × 8) device, distinguishing it from the SST39SF020A (A16) and SST39SF010A (A16). Pin A18 is NC for this variant.
What command sequence is required to perform a sector erase on the SST39SF040-45-4C-WHE?
To perform a sector erase on the SST39SF040-45-4C-WHE, a six-byte software command sequence must be executed: 5555H/AAH → 2AAAH/55H → 5555H/80H → 5555H/AAH → 2AAAH/55H → SAX/30H, where SAX is the 12-bit sector address applied to A12–A0. This is defined in Table 4 and Figure 10 of the Microchip datasheet DS20005022C, and the SST39SF040-45-4C-WHE requires this exact sequence to initiate erase.
Is the SST39SF040-45-4C-WHE RoHS compliant?
Yes, the SST39SF040-45-4C-WHE is RoHS compliant. The datasheet DS20005022C explicitly states "All devices are RoHS compliant" in the "Features" section on page 1, and the "-WHE" suffix in the part number denotes a lead-free, RoHS-compliant PLCC package per Microchip's packaging nomenclature.
SST39SF040-45-4C-WHE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- SST39 MPF™
- Package/Case:
- 32-TFSOP (0.488", 12.40mm Width)
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- FLASH
- Technology:
- FLASH
- Memory Size:
- 4Mbit
- Memory Organization:
- 512K x 8
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 20µs
- Access Time:
- 45 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-TSOP
SST39SF040-45-4C-WHE FAQ
1.How can I place an order for SST39SF040-45-4C-WHE through Aetrix?
Please submit a Request for Quotation (RFQ) for SST39SF040-45-4C-WHE 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 SST39SF040-45-4C-WHE reliable?
The price and inventory of SST39SF040-45-4C-WHE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SST39SF040-45-4C-WHE is usually 5 days.
3.What payment methods are accepted for SST39SF040-45-4C-WHE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST39SF040-45-4C-WHE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST39SF040-45-4C-WHE?
SST39SF040-45-4C-WHE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST39SF040-45-4C-WHE 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 SST39SF040-45-4C-WHE?
For technical support, including SST39SF040-45-4C-WHE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SST39SF040-45-4C-WHE requirements.
6.How does Aetrix verify that SST39SF040-45-4C-WHE is sourced from the original manufacturer or authorized distributors?
All SST39SF040-45-4C-WHE 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 SST39SF040-45-4C-WHE meets industry standards.
7.What is the process for return or replacement of SST39SF040-45-4C-WHE?
All SST39SF040-45-4C-WHE units undergo pre-shipment inspection (PSI). If there is an issue with SST39SF040-45-4C-WHE, 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 SST39SF040-45-4C-WHE part is unused and in its original packaging.
Return procedure for SST39SF040-45-4C-WHE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SST39SF040-45-4C-WHE Tags
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AT24C02C-XHM-T
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