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Microchip Technology SST39SF040-70-4C-WHE
- Part No.:
- SST39SF040-70-4C-WHE
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.488", 12.40mm Width)
- Datasheet:
-
SST39SF040-70-4C-WHE.pdf
- Description:
- IC FLASH 4MBIT PARALLEL 32TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:238
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Product details
Overview
SST39SF040-70-4C-WHE from Microchip Technology is a 4 Mbit (512K × 8) parallel-interface CMOS Multi-Purpose Flash memory IC with 70 ns read access time, single 4.5–5.5 V supply operation, and uniform 4 KByte sector-erase architecture. It delivers 100,000 program/erase cycles endurance and >100 years data retention, targeting firmware storage in industrial control panels, legacy embedded systems, and boot code applications requiring JEDEC-standard x8 pinout compatibility.
For engineers reviewing the SST39SF040-70-4C-WHE datasheet, SST39SF040-70-4C-WHE pinout, SST39SF040-70-4C-WHE application, or SST39SF040-70-4C-WHE equivalent, key selection criteria include its 32-pin PLCC package, TTL I/O compatibility, hardware/software data protection, SuperFlash technology energy efficiency, and sector-level erase capability for field-upgradable firmware.
Technical Context
The SST39SF040-70-4C-WHE implements SST's proprietary SuperFlash split-gate cell architecture with thick-oxide tunneling injector, enabling fixed erase/program times independent of cycle count-unlike conventional flash technologies where timing degrades over endurance life. Its command set conforms to JEDEC standard x8 flash pinouts and software protocols, including three-byte byte-program and six-byte sector/chip-erase sequences.
Operation relies on asynchronous CE#/OE#/WE# control logic with latched address/data buses, toggle-bit (DQ6) and data# polling (DQ7) for end-of-write detection, and dual standby modes (TTL/CMOS input) supporting 3 mA and 100 µA current draw respectively. The device supports software product identification (manufacturer ID = BFH, device ID = B7H) and exits ID mode via dedicated F0H command.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 4 Mbit (512K × 8), directly maps to 512 KB of firmware or configuration storage space |
| Read Access Time | 70 ns maximum - enables direct connection to 14 MHz microcontrollers without wait states |
| Supply Voltage | 4.5–5.5 V - compatible with legacy 5 V logic systems and eliminates need for auxiliary voltage regulators |
| Endurance | 100,000 program/erase cycles - supports frequent field firmware updates over product lifetime |
| Data Retention | Greater than 100 years - ensures long-term reliability in unpowered storage applications |
| Sector Size | Uniform 4 KByte sectors - allows selective firmware patching without full chip erase |
| Byte-Program Time | 14 µs typical - reduces firmware update latency compared to slower parallel flash alternatives |
Pinout & Package
Package: 32-lead Plastic Leaded Chip Carrier (PLCC), 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 address decoding; A17 is MSB for SST39SF040 (vs A16 for SST39SF010A) |
| DQ0–DQ7 | Data Input/Output | Bi-directional 8-bit data bus; outputs tri-state when CE# or OE# high; latched during write |
| CE# | Chip Enable | Active-low chip select; device enters standby (3 mA) when high |
| OE# | Output Enable | Active-low output gate; controls DQ bus tristate independently of CE# |
| WE# | Write Enable | Active-low write strobe; initiates internal program/erase after command sequence |
| VDD | Power Supply | 4.5–5.5 V supply; includes internal VPP generation for programming |
| VSS | Ground | Reference ground for all signals and power domains |
| 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 with thick-oxide tunneling injector enables fixed 14 µs byte-program and 18 ms sector-erase times across full endurance life |
| JEDEC Standard Compliance | Fully compatible with industry-standard x8 flash command sets and pinouts, enabling drop-in replacement in existing designs |
| Hardware + Software Data Protection | Glitch immunity (<5 ns), VDD power-up/down detection, and mandatory 3-/6-byte command sequences prevent accidental writes |
| Low Standby Power | 100 µA CMOS standby current enables battery-backed operation in maintenance-free embedded systems |
| End-of-Write Detection | Dual status methods (DQ6 toggle bit and DQ7 data# polling) allow host CPU to perform other tasks during erase/program operations |
Applications
| Industrial PLC Firmware Storage | Legacy Medical Device Boot Code |
|---|---|
Use Scenario: Storing programmable logic controller firmware updated via serial port or SD card. IC Role / Device Role / Timing Role: Nonvolatile boot memory holding executable code executed at power-on reset. Use Value: 4 KByte sector erase enables patching individual function blocks without full reflash, reducing downtime during field service. | Use Scenario: Holding boot loader and safety-critical initialization routines in FDA-cleared diagnostic equipment. IC Role / Device Role / Timing Role: Primary boot ROM accessed by microcontroller during cold start before RAM initialization. Use Value: >100-year data retention guarantees firmware integrity over multi-decade device lifecycle without recalibration or replacement. |
| Automotive ECU Configuration Memory | Point-of-Sale Terminal Parameter Storage |
Use Scenario: Storing calibration tables and vehicle-specific configuration parameters in engine control units. IC Role / Device Role / Timing Role: Read-only configuration memory mapped into microcontroller address space during runtime. Use Value: 70 ns access time meets real-time deterministic timing requirements for closed-loop fuel injection control loops. | Use Scenario: Retaining tax rates, language settings, and peripheral configurations across power cycles in retail terminals. IC Role / Device Role / Timing Role: Nonvolatile parameter store accessed during GUI initialization and transaction processing. Use Value: Hardware write inhibit (OE#/CE#/WE# high) prevents corruption during unexpected AC power loss or battery swap events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AM29LV040B-70EC | 4 Mbit (512K × 8), 70 ns access, but uses AMD's CFI-compliant command set and requires 12 V VPP for programming | Lacks integrated VPP generation; requires external high-voltage circuitry and different software driver support | Select only if legacy AMD ecosystem compatibility is required and board-level VPP generation is already present |
| MX29LV040CTTI-70G | 4 Mbit (512K × 8), 70 ns access, Macronix implementation with 3.3 V core but 5 V I/O tolerance | Requires separate 3.3 V core supply; not single-supply 5 V compatible like SST39SF040-70-4C-WHE | Choose only when system already uses mixed 3.3 V/5 V rail architecture and lower active power is prioritized |
Compared with AM29LV040B-70EC and MX29LV040CTTI-70G, the SST39SF040-70-4C-WHE offers true single 5 V supply operation with internal VPP generation, eliminating external high-voltage components and simplifying firmware update logic-critical for cost-sensitive industrial and medical designs.
Availability
SST39SF040-70-4C-WHE is available at Aetrix Electronics and suitable for industrial control panels, legacy medical devices, automotive ECUs, and point-of-sale terminals requiring stable component supply and long-term obsolescence management.
Supply support for SST39SF040-70-4C-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 global semiconductor company specializing in microcontrollers, analog devices, and memory solutions, with a focus on embedded control and connectivity.
The SST39SF040-70-4C-WHE belongs to Microchip's legacy SuperFlash parallel flash product line, designed specifically for cost-sensitive, 5 V-based embedded systems requiring reliable, field-upgradable nonvolatile storage without complex voltage translation or external programming hardware.
FAQ
What is the exact memory organization of the SST39SF040-70-4C-WHE?
The SST39SF040-70-4C-WHE is organized as 512K × 8 bits (4 Mbit total), with address lines A0–A17 supporting full 512 KB addressing. This matches JEDEC-standard x8 parallel flash topology and enables direct interface to 8-bit microcontrollers and address decoders without data width conversion logic.
Does the SST39SF040-70-4C-WHE require an external VPP voltage for programming?
No, the SST39SF040-70-4C-WHE integrates internal VPP generation and operates with a single 4.5–5.5 V supply for both read and write operations. This eliminates the need for external high-voltage circuitry, simplifying board design and reducing BOM cost compared to older flash families like AM29LV040B.
How does the SST39SF040-70-4C-WHE ensure data integrity during power loss?
The SST39SF040-70-4C-WHE employs multiple hardware protections: noise/glitch immunity (rejects WE#/CE# pulses <5 ns), VDD power-up/down detection (inhibits writes below 2.5 V), and write-inhibit mode (OE# low, CE# high, or WE# high). These features prevent partial writes during brown-out conditions, ensuring SST39SF040-70-4C-WHE retains valid firmware even after abrupt power interruption.
What is the sector erase time specification for the SST39SF040-70-4C-WHE?
The SST39SF040-70-4C-WHE has a typical sector-erase time of 18 ms per 4 KByte sector, with a maximum specified time of 25 ms under worst-case conditions. This fixed timing-guaranteed across the full 100,000-cycle endurance life-is a direct result of SuperFlash technology and enables deterministic firmware update scheduling in real-time systems.
Is the SST39SF040-70-4C-WHE RoHS compliant and what package does it use?
Yes, the SST39SF040-70-4C-WHE is RoHS compliant and supplied in a 32-lead Plastic Leaded Chip Carrier (PLCC) package. This surface-mount package supports reflow soldering, provides mechanical robustness for industrial environments, and maintains full pin compatibility with other members of the SST39SFxxxA family.
SST39SF040-70-4C-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:
- 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:
- 70 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
SST39SF040-70-4C-WHE FAQ
1.How can I place an order for SST39SF040-70-4C-WHE through Aetrix?
Please submit a Request for Quotation (RFQ) for SST39SF040-70-4C-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 SST39SF040-70-4C-WHE reliable?
The price and inventory of SST39SF040-70-4C-WHE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SST39SF040-70-4C-WHE is usually 5 days.
3.What payment methods are accepted for SST39SF040-70-4C-WHE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST39SF040-70-4C-WHE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST39SF040-70-4C-WHE?
SST39SF040-70-4C-WHE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST39SF040-70-4C-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 SST39SF040-70-4C-WHE?
For technical support, including SST39SF040-70-4C-WHE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SST39SF040-70-4C-WHE requirements.
6.How does Aetrix verify that SST39SF040-70-4C-WHE is sourced from the original manufacturer or authorized distributors?
All SST39SF040-70-4C-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 SST39SF040-70-4C-WHE meets industry standards.
7.What is the process for return or replacement of SST39SF040-70-4C-WHE?
All SST39SF040-70-4C-WHE units undergo pre-shipment inspection (PSI). If there is an issue with SST39SF040-70-4C-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 SST39SF040-70-4C-WHE part is unused and in its original packaging.
Return procedure for SST39SF040-70-4C-WHE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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