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Microchip Technology SST39SF040-55-4I-NHE
- Part No.:
- SST39SF040-55-4I-NHE
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
SST39SF040-55-4I-NHE.pdf
- Description:
- IC FLASH 4MBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:575
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Product details
Overview
SST39SF040-55-4I-NHE from Microchip Technology is a 4-Mbit (512K × 8) CMOS Multi-Purpose Flash memory IC with 55 ns read access time, single 4.5V–5.5V supply operation, and uniform 4-Kbyte sector erase architecture. It delivers 100,000 program/erase cycles endurance and >100 years data retention, serving as nonvolatile code/data storage in embedded microcontroller systems requiring field-upgradable firmware.
For engineers reviewing the SST39SF040-55-4I-NHE datasheet, SST39SF040-55-4I-NHE pinout, SST39SF040-55-4I-NHE application, or SST39SF040-55-4I-NHE equivalent, key selection criteria include JEDEC-standard x8 parallel interface timing, hardware/software write protection, toggle-bit/data# polling status detection, and compatibility with 32-lead TSOP-32 packaging for space-constrained industrial control modules.
Technical Context
This device implements Microchip's SuperFlash® technology with split-gate cell design and 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 architecture conforms to JEDEC standard pinouts and software protocols for x8 memories, supporting byte-program, sector-erase, and chip-erase operations via six-byte software data protection sequences.
The SST39SF040-55-4I-NHE operates across -40°C to +85°C (Industrial grade), uses TTL-compatible I/Os, and features dual standby current modes: 3 mA (TTL input) and 100 µA (CMOS input). Internal VPP generation eliminates external high-voltage programming supplies, while noise/glitch protection and VDD power-up/down detection prevent inadvertent writes during voltage transients.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 4 Mbit (512K × 8) - supports full firmware images for mid-complexity 8/16-bit MCUs |
| Read Access Time | 55 ns - enables direct execution from flash (XIP) at up to ~14 MHz system clock |
| Supply Voltage | 4.5V–5.5V - compatible with legacy 5V logic systems without level-shifting |
| Endurance | 10,000 cycles minimum (JEDEC A117) - validated for frequent field updates in industrial HMI |
| Data Retention | 100 years minimum (JEDEC A103) - ensures long-term reliability in unattended equipment |
| Sector Size | Uniform 4-Kbyte sectors - allows granular firmware patching without full chip erase |
| Byte Program Time | ≤10 µs max - reduces update latency in real-time bootloaders |
| Chip Erase Time | ≤100 ms max - enables rapid factory reprogramming during production test |
Pinout & Package
Package: 32-lead TSOP-I (Thin Small Outline Package), 12 × 20 mm body, 0.5 mm lead pitch, RoHS compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | 18-bit address bus (A0–A17); A18 is NC for this variant per Figure 2-1 TSOP pinout note 2 |
| DQ0–DQ7 | Data I/O | 8-bit bidirectional data bus; tri-stated when CE# or OE# high; latched during write |
| CE# | Chip Enable | Active-low chip select; must be low for read/write; enables standby mode when high |
| OE# | Output Enable | Active-low output gate; controls DQ bus drive; high-Z when asserted high during read |
| WE# | Write Enable | Active-low write control; initiates byte program/sector/chip erase on rising edge per timing diagrams |
| VDD | Power Supply | +4.5V to +5.5V supply; powers core logic and I/O buffers; internal VPP generated from VDD |
| VSS | Ground | Reference ground for all signals and internal circuitry |
| NC | No Connection | Pins 1 and 30 are NC (not connected) per TSOP pinout note 2; no external tie required |
Key Features
| Feature | Design Value |
|---|---|
| SuperFlash® Technology | Fixed 55 ns read and ≤10 µs byte program times across full 10,000-cycle lifetime-no firmware derating needed |
| Software Data Protection | JEDEC-standard 6-byte command sequence required for sector/chip erase-prevents accidental firmware corruption |
| Status Detection | Dual-mode end-of-write detection: Toggle Bit (DQ6) and Data# Polling (DQ7)-enables efficient polling without timers |
| Hardware Write Inhibit | VDD power-up/down detection + <5 ns noise immunity on WE#/CE#-eliminates need for external reset supervisors |
| Uniform Sector Architecture | 128 independent 4-Kbyte sectors-supports modular firmware updates and secure bootloader partitioning |
Applications
| Industrial PLC Firmware Storage | Medical Device Configuration Memory |
|---|---|
|
Use Scenario: Storing ladder logic programs and I/O mapping tables in programmable logic controllers subject to periodic field updates via serial port. IC Role / Device Role / Timing Role: Nonvolatile code storage with XIP-capable 55 ns access; sector erase enables partial firmware patches without disrupting runtime logic. Use Value: Eliminates need for external EEPROM + SRAM combo; 100-year retention ensures calibration data integrity over equipment lifetime. |
Use Scenario: Holding device-specific calibration coefficients, user preferences, and regulatory audit logs in portable diagnostic instruments. IC Role / Device Role / Timing Role: Secure configuration memory with hardware/software write protection preventing unauthorized parameter changes. Use Value: Meets IEC 62304 Class C software requirements via 10,000-cycle endurance and deterministic erase timing. |
| Automotive Body Control Module | Networking Equipment Bootloader |
|
Use Scenario: Storing lighting control algorithms and CAN message routing tables in under-hood BCMs operating at -40°C to +85°C. IC Role / Device Role / Timing Role: Industrial-grade flash memory with 4.5V–5.5V tolerance-survives automotive battery transients without data loss. Use Value: Reduces BOM count by replacing discrete 5V regulator + EEPROM; RoHS compliance meets automotive ELV directives. |
Use Scenario: Hosting primary bootloader and fail-safe recovery image in enterprise switches requiring zero-downtime firmware upgrades. IC Role / Device Role / Timing Role: Dual-sector protected storage: one sector for active bootloader, second for backup-enabling atomic update rollback. Use Value: Chip erase time ≤100 ms allows full recovery image reload within network maintenance windows. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar parallel-interface flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT49BV040A-55TI | 4-Mbit (512K × 8), 55 ns access, but requires 12V VPP for programming; no internal charge pump | Lacks integrated VPP generation-requires external high-voltage circuitry and increases PCB complexity | Choose only if legacy 12V programming infrastructure exists; SST39SF040-55-4I-NHE reduces system cost and board area |
| MX29LV040CTTI-55G | 4-Mbit (512K × 8), 55 ns, 3.0V core (but 5V I/O tolerant); different command set and sector layout | Uses 3V-only erase/program voltages-requires level shifters for 5V MCU buses; incompatible sector addressing | Select for new 3.3V designs; SST39SF040-55-4I-NHE maintains full 5V compatibility without interface translation |
Compared with AT49BV040A-55TI and MX29LV040CTTI-55G, the SST39SF040-55-4I-NHE uniquely combines 5V-only operation, internal VPP generation, JEDEC-standard command set, and uniform 4-Kbyte sectors-making it the optimal drop-in replacement for legacy 5V microcontroller systems requiring field-upgradable firmware.
Availability
SST39SF040-55-4I-NHE is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device configuration memory, automotive body control modules, and networking equipment bootloaders requiring stable component supply across extended product lifecycles.
Supply support for SST39SF040-55-4I-NHE 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 Inc. is a leading provider of microcontroller, analog, FPGA, and memory solutions, with broad industrial and automotive qualification portfolios.
The SST39SF040-55-4I-NHE belongs to Microchip's Multi-Purpose Flash (MPF) family, designed specifically for cost-sensitive, 5V-based embedded systems needing reliable, field-upgradable nonvolatile storage without external high-voltage circuitry.
FAQ
What is the maximum operating temperature range for the SST39SF040-55-4I-NHE?
The SST39SF040-55-4I-NHE is rated for Industrial temperature range: -40°C to +85°C. This specification is verified per Table 5-1 in the official datasheet DS20005022F, making it suitable for under-hood automotive and factory-floor industrial applications where ambient temperatures exceed commercial-grade limits. The SST39SF040-55-4I-NHE maintains full 4.5V–5.5V operation and 55 ns read timing across this entire range.
Does the SST39SF040-55-4I-NHE require an external VPP voltage for programming?
No, the SST39SF040-55-4I-NHE does not require an external VPP voltage. It integrates an internal charge pump that generates the necessary high voltage for erase and program operations from the standard 4.5V–5.5V VDD supply alone. This eliminates external high-voltage circuitry, simplifies PCB layout, and reduces system cost-confirmed in the Product Description section and "Automatic Write Timing" feature list of DS20005022F. The SST39SF040-55-4I-NHE achieves this while maintaining JEDEC-standard command compatibility.
How many address lines does the SST39SF040-55-4I-NHE use, and what is the significance of A18?
The SST39SF040-55-4I-NHE uses 18 address lines (A0–A17) to access its 512K × 8 organization. Per Figure 2-1 and Table 2-1 in DS20005022F, Pin 1 is NC and Pin 30 is NC for the TSOP package-meaning A18 is not physically bonded out and is unused. This distinguishes it from higher-density variants; the SST39SF040-55-4I-NHE's AMS (most significant address) is A17, not A18. This pinout mapping is critical for correct PCB layout and avoids misinterpretation of the 32-lead TSOP footprint.
What write protection mechanisms does the SST39SF040-55-4I-NHE implement?
The SST39SF040-55-4I-NHE implements dual-layer write protection: hardware-level inhibition (VDD power-up/down detection, <5 ns noise immunity on WE#/CE#, and OE#/CE#/WE# state monitoring) plus software-level JEDEC-standard 6-byte command sequences for erase operations. These mechanisms are documented in Sections 3.8–3.10 of DS20005022F. The SST39SF040-55-4I-NHE ships with Software Data Protection permanently enabled, ensuring robust defense against accidental firmware overwrite during power transitions or EMI events.
Is the SST39SF040-55-4I-NHE pin-compatible with other devices in the SST39SFxxxA family?
The SST39SF040-55-4I-NHE shares identical 32-lead TSOP pinout and JEDEC-standard command set with SST39SF010A and SST39SF020A, but differs in address line usage: A18 is NC (not connected) on SST39SF040-55-4I-NHE per TSOP pinout note 2, whereas A18 is functional on higher-density variants. While pinout and interface are compatible, firmware must account for the 512K × 8 memory map. This mechanical and electrical compatibility enables scalable design reuse across product tiers using the SST39SF040-55-4I-NHE.
SST39SF040-55-4I-NHE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- SST39 MPF™
- Package/Case:
- 32-LCC (J-Lead)
- Packaging:
- Tube
- Product Status:
- Active
- 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:
- 55 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-PLCC (11.43x13.97)
SST39SF040-55-4I-NHE FAQ
1.How can I place an order for SST39SF040-55-4I-NHE through Aetrix?
Please submit a Request for Quotation (RFQ) for SST39SF040-55-4I-NHE 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 SST39SF040-55-4I-NHE reliable?
The price and inventory of SST39SF040-55-4I-NHE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SST39SF040-55-4I-NHE is usually 5 days.
3.What payment methods are accepted for SST39SF040-55-4I-NHE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST39SF040-55-4I-NHE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST39SF040-55-4I-NHE?
SST39SF040-55-4I-NHE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST39SF040-55-4I-NHE 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 SST39SF040-55-4I-NHE?
For technical support, including SST39SF040-55-4I-NHE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SST39SF040-55-4I-NHE requirements.
6.How does Aetrix verify that SST39SF040-55-4I-NHE is sourced from the original manufacturer or authorized distributors?
All SST39SF040-55-4I-NHE 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 SST39SF040-55-4I-NHE meets industry standards.
7.What is the process for return or replacement of SST39SF040-55-4I-NHE?
All SST39SF040-55-4I-NHE units undergo pre-shipment inspection (PSI). If there is an issue with SST39SF040-55-4I-NHE, 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 SST39SF040-55-4I-NHE part is unused and in its original packaging.
Return procedure for SST39SF040-55-4I-NHE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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