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Microchip Technology SST39SF040-55-4C-WHE
- Part No.:
- SST39SF040-55-4C-WHE
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.488", 12.40mm Width)
- Datasheet:
-
SST39SF040-55-4C-WHE.pdf
- Description:
- IC FLASH 4MBIT PARALLEL 32TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,224
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Product details
Overview
SST39SF040-55-4C-WHE from Microchip Technology is a 4 Mbit (512K × 8) parallel-interface Multi-Purpose Flash memory IC with 55 ns read access time, single 4.5–5.5 V supply operation, and uniform 4 KB sector-erase architecture. It implements SST's SuperFlash technology for high reliability in embedded firmware storage applications requiring field-upgradable code or configuration data.
For engineers reviewing the SST39SF040-55-4C-WHE datasheet, SST39SF040-55-4C-WHE pinout, SST39SF040-55-4C-WHE application, or SST39SF040-55-4C-WHE equivalent, key selection criteria include JEDEC-standard x8 pinout compatibility, TTL I/O levels, hardware/software data protection, and 100,000-cycle endurance for industrial control firmware updates.
Technical Context
This device uses split-gate SuperFlash 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. It supports standard microprocessor bus interfacing via CE#, OE#, and WE# control signals with latched address/data inputs.
Operation relies on JEDEC-compliant command sequences: three-byte load for byte-program, six-byte for sector/chip-erase, and software ID entry/exit. End-of-write detection is implemented via Data# Polling (DQ7) and Toggle Bit (DQ6), both valid after defined WE#/CE# edge counts per operation type.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 4 Mbit (512K × 8), supporting full firmware image storage for mid-complexity microcontrollers. |
| Read Access Time | 55 ns - enables direct execution from flash (XIP) in systems with ≤18 MHz bus clocks. |
| Supply Voltage | 4.5–5.5 V - compatible with legacy 5 V logic systems without level-shifting. |
| Endurance | 100,000 program/erase cycles - sufficient for >10 years of annual field firmware updates in industrial equipment. |
| Data Retention | >100 years - ensures long-term reliability in unpowered storage for calibration tables or boot code. |
| Sector Size | Uniform 4 KB sectors - allows granular firmware patching without erasing entire device. |
| Write Timing | Byte-program: 14 µs typical; Chip-erase: 8 s typical - enables rapid reprogramming during manufacturing or service. |
Pinout & Package
Package: 32-lead PLCC (Plastic Leaded Chip Carrier), RoHS compliant, with 1.27 mm pitch and surface-mount footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | A0–A17 provide full 512K-word addressing; A18 is not used (NC) for SST39SF040 in PLCC package. |
| DQ0–DQ7 | Data Input/Output | Bi-directional 8-bit data bus; outputs tri-state when CE# or OE# is high; latched during write cycles. |
| 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 during read; high = high-impedance state. |
| WE# | Write Enable | Active-low write control; initiates internal program/erase timing upon rising edge per JEDEC command sequence. |
| VDD | Power Supply | +4.5 to +5.5 V supply; powers core logic and flash array; includes internal VPP generation for programming. |
| VSS | Ground | Reference ground for all I/O and core circuitry; must be low-impedance connection. |
| NC | No Connection | Pins 16 and 31 are unconnected in PLCC; must remain floating or tied to ground per layout guidelines. |
Key Features
| Feature | Design Value |
|---|---|
| SuperFlash Technology | Split-gate cell with thick-oxide injector delivers stable 55 ns read and fixed 14 µs byte-program time across full endurance life. |
| JEDEC Standard Compliance | Pinout and command set match industry-standard x8 flash devices, enabling drop-in replacement in existing 5 V designs. |
| Hardware + Software Data Protection | Glitch immunity (<5 ns pulses rejected), VDD power-up/down detection, and mandatory 3-/6-byte command sequences prevent accidental writes. |
| End-of-Write Detection | DQ7 (Data# Polling) and DQ6 (Toggle Bit) provide deterministic status reporting without external timers or polling delays. |
| Low Power Standby | 30 µA typical ISB2 (CMOS input) enables battery-backed operation in sleep-mode systems. |
Applications
| Industrial PLC Firmware Storage | Medical Device Boot Code |
|---|---|
Use Scenario: Storing and updating ladder logic firmware in programmable logic controllers deployed in factory automation environments. IC Role / Device Role / Timing Role: Nonvolatile code storage with in-system reprogrammability via RS-232 or CAN-based service interface. Use Value: 4 KB sector erase enables patch-level updates without full reflash, reducing downtime during maintenance windows. | Use Scenario: Holding certified boot loader and safety-critical initialization routines in portable diagnostic equipment. IC Role / Device Role / Timing Role: Primary boot memory mapped to CPU reset vector; accessed within 55 ns for deterministic startup timing. Use Value: 100-year data retention ensures integrity of regulatory-approved code across product lifetime without recalibration. |
| Telecom Base Station Configuration | Automotive ECU Calibration Tables |
Use Scenario: Storing RF calibration parameters and protocol stack configuration in outdoor wireless infrastructure units. IC Role / Device Role / Timing Role: Parallel-connected configuration memory accessed during power-on self-test (POST) before radio initialization. Use Value: Single 5 V supply eliminates need for auxiliary voltage regulators, simplifying power design in space-constrained enclosures. | Use Scenario: Retaining engine tuning maps and emission control parameters subject to periodic dealer-level recalibration. IC Role / Device Role / Timing Role: EEPROM-replacement storage for nonvolatile parameter sets updated via OBD-II interface. Use Value: 100,000-cycle endurance exceeds automotive OEM requirements for 15+ year service life with multiple reflashes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar parallel NOR flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AM29LV040B-55EC | 4 Mbit, 55 ns, 3.0 V core (3.0–3.6 V), requires VPP = 12 V for programming | Requires dual-supply design; incompatible with pure 5 V systems | Select only if migrating to 3.3 V system architecture with voltage translation support. |
| MX29LV040CTT-55G | 4 Mbit, 55 ns, 3.0 V core (2.7–3.6 V), no VPP needed, but JEDEC command set differs | Not pin-compatible; requires firmware modification for command sequences and status polling | Choose only when redesigning for lower voltage and accepting software adaptation effort. |
Compared with AM29LV040B-55EC and MX29LV040CTT-55G, the SST39SF040-55-4C-WHE offers native 5 V operation without external VPP, JEDEC-standard command compatibility, and guaranteed 55 ns timing across temperature-making it optimal for legacy 5 V industrial and telecom platforms requiring zero-hardware-change upgrades.
Availability
SST39SF040-55-4C-WHE is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device boot code, telecom base station configuration, and automotive ECU calibration tables requiring stable component supply and long-term lifecycle support.
Supply support for SST39SF040-55-4C-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 components, and memory solutions for embedded control applications.
The SST39SF040-55-4C-WHE belongs to Microchip's legacy SST SuperFlash parallel NOR flash product line, designed specifically for cost-sensitive, 5 V industrial and telecom systems requiring reliable, field-upgradable firmware storage with JEDEC interoperability.
FAQ
What is the maximum operating temperature range for the SST39SF040-55-4C-WHE?
The SST39SF040-55-4C-WHE is rated for industrial temperature operation from –40°C to +85°C, as specified in Table 5 of the official Microchip datasheet DS20005022C. This makes the SST39SF040-55-4C-WHE suitable for deployment in harsh environments such as factory floors, outdoor telecom cabinets, and vehicle under-hood applications where thermal stability is critical.
Does the SST39SF040-55-4C-WHE require an external VPP voltage for programming?
No, the SST39SF040-55-4C-WHE does not require an external VPP voltage. It generates internal high-voltage programming pulses using its on-chip charge pump, enabled by the single 4.5–5.5 V VDD supply. This eliminates the need for external high-voltage circuitry and simplifies system design compared to older flash devices like the AMD AM29F040.
How many address lines does the SST39SF040-55-4C-WHE use in its PLCC package?
The SST39SF040-55-4C-WHE uses 18 address lines (A0–A17) in its 32-lead PLCC package to access its full 512K × 8 memory space. Pin A18 is not present and is designated NC (no connection) per Figure 2 of the datasheet. Address lines A16–A17 are active; A18 is unused and must remain unconnected.
Can the SST39SF040-55-4C-WHE be used as a direct replacement for the SST39SF040-70-4C-WHE?
Yes, the SST39SF040-55-4C-WHE is functionally identical to the SST39SF040-70-4C-WHE except for read access time: 55 ns vs. 70 ns. Both share identical pinout, command set, voltage, timing margins, and packaging. The SST39SF040-55-4C-WHE may be substituted where faster timing is beneficial, provided system timing budgets accommodate the tighter specification.
What software methods detect completion of a byte-program operation on the SST39SF040-55-4C-WHE?
The SST39SF040-55-4C-WHE supports two standardized software detection methods: Data# Polling (monitoring DQ7 for transition from complement to true data) and Toggle Bit (monitoring DQ6 for cessation of toggling). Both become valid after the rising edge of the fourth WE# or CE# pulse and are fully documented in Section 8 of the SST39SF040-55-4C-WHE datasheet.
SST39SF040-55-4C-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:
- 55 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
SST39SF040-55-4C-WHE FAQ
1.How can I place an order for SST39SF040-55-4C-WHE through Aetrix?
Please submit a Request for Quotation (RFQ) for SST39SF040-55-4C-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 SST39SF040-55-4C-WHE reliable?
The price and inventory of SST39SF040-55-4C-WHE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SST39SF040-55-4C-WHE is usually 5 days.
3.What payment methods are accepted for SST39SF040-55-4C-WHE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST39SF040-55-4C-WHE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST39SF040-55-4C-WHE?
SST39SF040-55-4C-WHE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST39SF040-55-4C-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 SST39SF040-55-4C-WHE?
For technical support, including SST39SF040-55-4C-WHE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SST39SF040-55-4C-WHE requirements.
6.How does Aetrix verify that SST39SF040-55-4C-WHE is sourced from the original manufacturer or authorized distributors?
All SST39SF040-55-4C-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 SST39SF040-55-4C-WHE meets industry standards.
7.What is the process for return or replacement of SST39SF040-55-4C-WHE?
All SST39SF040-55-4C-WHE units undergo pre-shipment inspection (PSI). If there is an issue with SST39SF040-55-4C-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 SST39SF040-55-4C-WHE part is unused and in its original packaging.
Return procedure for SST39SF040-55-4C-WHE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SST39SF040-55-4C-WHE Tags
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