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Microchip Technology SST39LF040-45-4C-NHE
- Part No.:
- SST39LF040-45-4C-NHE
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
SST39LF040-45-4C-NHE.pdf
- Description:
- IC FLASH 4MBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:4,139
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Product details
Overview
SST39LF040-45-4C-NHE from Microchip Technology is a 4 Mbit (512K × 8) CMOS Multi-Purpose Flash memory IC with 3.0–3.6 V single-supply operation, 45 ns read access time, and JEDEC-standard x8 parallel interface. It features uniform 4 KB sector erase, 100,000 write/erase cycles endurance, and >100 years data retention - deployed in embedded firmware storage for industrial controllers and legacy BIOS modules.
For engineers reviewing the SST39LF040-45-4C-NHE datasheet, SST39LF040-45-4C-NHE pinout, SST39LF040-45-4C-NHE application, or SST39LF040-45-4C-NHE equivalent, key selection criteria include its 32-pin PLCC package, 45 ns read timing, SuperFlash® technology energy efficiency, hardware/software data protection, and compatibility with standard 8-bit microcontroller address/data buses.
Technical Context
The SST39LF040-45-4C-NHE implements SST's proprietary SuperFlash® split-gate cell architecture with thick-oxide tunneling injector, enabling fixed erase/program times independent of cycle count. It supports byte-program (20 µs typical), sector-erase (18 ms), and chip-erase (70 ms) via JEDEC-standard command sequences using CE#, OE#, and WE# control lines.
Operation requires no external VPP voltage - internal charge pump generates programming voltage. Write status detection uses Data# Polling (DQ7) and Toggle Bit (DQ6); hardware protection includes noise/glitch immunity (<5 ns pulse rejection), VDD power-up/down detection (<1.5 V inhibit), and write-inhibit mode via CE#/OE#/WE# logic states.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 4 Mbit (512K × 8) - supports full firmware images for 8-bit MCUs without bank switching |
| Read Access Time | 45 ns - enables direct execution from flash (XIP) at up to ~14 MHz bus frequency |
| Supply Voltage | 3.0–3.6 V - compatible with 3.3 V logic systems; no level-shifting required |
| Endurance | 100,000 cycles - sufficient for field firmware updates over 10+ years in industrial equipment |
| Data Retention | >100 years - ensures long-term reliability in unpowered storage applications |
| Active Current | 5 mA typical at 14 MHz - reduces system power budget vs. alternative NOR flash technologies |
| Standby Current | 1 µA typical - enables low-power sleep modes in battery-backed systems |
Pinout & Package
Package: 32-lead PLCC (Plastic Leaded Chip Carrier), body size 13.97 mm × 13.97 mm, lead pitch 1.27 mm - RoHS-compliant, surface-mountable with standard reflow profile (260°C/10 s).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A18 | Address Inputs | A0–A18 provide full 512K-word addressing; A17/A18 used only for SST39LF040 (not present on smaller variants) |
| DQ0–DQ7 | Data I/O | 8-bit bidirectional data bus; tri-stated when CE# or OE# high - directly interfaces 8-bit microcontrollers |
| CE# | Chip Enable | Active-low chip select; enables device for read/write when low - used for memory-mapped decoding |
| OE# | Output Enable | Active-low output gate; controls DQ bus drive during read - allows shared bus arbitration |
| WE# | Write Enable | Active-low write strobe; initiates program/erase commands - synchronizes command sequence timing |
| VDD | Power Supply | +3.0–3.6 V supply; powers internal charge pump and logic - no external VPP required |
| VSS | Ground | Reference ground for all signals and internal circuitry - must be low-impedance connection |
| NC | No Connect | Pins marked NC (e.g., A12 on PLCC) are unconnected - must remain floating or grounded per layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| SuperFlash® Technology | Split-gate cell with thick-oxide injector delivers fixed 20 µs program and 18 ms sector-erase times across full lifecycle - eliminates software de-rating |
| Uniform 4 KB Sectors | 128 individually erasable sectors enable granular firmware updates without full chip erase - reduces update time and wear leveling overhead |
| Hardware + Software Protection | Glitch immunity, VDD monitoring, and JEDEC-standard 3-byte/6-byte command sequences prevent accidental writes during power transitions |
| CMOS I/O Compatibility | Full TTL/CMOS voltage thresholds (VIL = 0.8 V, VIH = 0.7×VDD) ensure interoperability with legacy 3.3 V microcontrollers and FPGAs |
| JEDEC Standard Pinout | Pin-compatible with industry-standard x8 parallel NOR flash devices - simplifies drop-in replacement in existing designs |
Applications
| Industrial PLC Firmware Storage | Legacy PC BIOS/UEFI Module |
|---|---|
Use Scenario: Storing configuration logic and motion control algorithms in programmable logic controllers operating in factory environments with wide temperature swings and EMI. IC Role / Device Role / Timing Role: Nonvolatile code storage with XIP-capable 45 ns read access - executes firmware directly from flash without RAM copy. Use Value: Eliminates external SRAM requirement for boot code; 100,000-cycle endurance supports field firmware patches over 15-year product life. | Use Scenario: Holding BIOS initialization routines and hardware abstraction layer in desktop motherboards prior to OS load. IC Role / Device Role / Timing Role: Primary boot ROM mapped at 0xFFFF0000; accessed via ISA/LPC bus with CE#/OE# decode. Use Value: 45 ns timing meets legacy chipset timing budgets; JEDEC pinout ensures compatibility with BIOS socket footprints. |
| Medical Device Bootloader | Automotive Body Control Module |
Use Scenario: Secure bootloader storage in FDA-cleared diagnostic instruments requiring traceable firmware revision history and tamper resistance. IC Role / Device Role / Timing Role: Protected code partition isolated via software data protection (SDP) - prevents unauthorized modification during service. Use Value: Hardware write-inhibit and 100-year data retention satisfy regulatory requirements for long-term device certification validity. | Use Scenario: Storing calibration tables and CAN protocol stacks in automotive BCMs exposed to -40°C to +85°C ambient conditions. IC Role / Device Role / Timing Role: Secondary nonvolatile memory for runtime parameter storage - accessed via 8-bit MCU parallel bus during vehicle startup. Use Value: 3.0–3.6 V operation tolerates automotive battery transients; >100-year retention avoids recalibration over vehicle lifetime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar parallel NOR flash applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MX29LV040CTTI-70G | 4 Mbit, 70 ns access, 2.7–3.6 V supply - slower read speed, wider VDD range | Requires timing adjustment in XIP systems; suitable where 70 ns is acceptable | Select when lower cost or extended voltage margin outweighs 45 ns performance need |
| EN29LV040A-70TP | 4 Mbit, 70 ns, 2.7–3.6 V - same timing and voltage as MX29LV040 but different command set | Non-JEDEC command protocol requires firmware driver changes | Choose only if existing design already uses EN29LV series and migration path is validated |
Compared with MX29LV040CTTI-70G and EN29LV040A-70TP, the SST39LF040-45-4C-NHE provides faster 45 ns read access and JEDEC-standard command compatibility - reducing integration effort and enabling higher-performance XIP execution in resource-constrained embedded systems.
Availability
SST39LF040-45-4C-NHE is available at Aetrix Electronics and suitable for industrial PLC firmware storage, legacy PC BIOS modules, medical device bootloaders, and automotive body control modules requiring stable component supply and long-term obsolescence management.
Supply support for SST39LF040-45-4C-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 is a global semiconductor company specializing in microcontrollers, analog devices, and memory solutions - acquired Silicon Storage Technology (SST) in 2010 to expand its nonvolatile memory portfolio.
The SST39LF040-45-4C-NHE belongs to the SST39LF/VF Multi-Purpose Flash family, designed specifically for cost-sensitive, high-reliability embedded applications requiring robust firmware storage with minimal external components and no VPP generation.
FAQ
What is the maximum clock frequency supported by SST39LF040-45-4C-NHE for reliable read operations?
The SST39LF040-45-4C-NHE guarantees 45 ns read access time, supporting effective bus frequencies up to ~14 MHz for direct execution (XIP). This timing is validated across commercial temperature range (0°C to +70°C) and 3.0–3.6 V supply. The device does not use an internal clock; timing depends entirely on external CE# and OE# signal alignment per JEDEC AC specifications in DS25023A.
Does SST39LF040-45-4C-NHE require an external VPP voltage for programming?
No, the SST39LF040-45-4C-NHE does not require external VPP. It integrates an internal charge pump that generates the high voltage needed for programming and erasing using only the 3.0–3.6 V VDD supply. This eliminates external high-voltage circuitry and simplifies board design - a core advantage of SST's SuperFlash® technology implemented in the SST39LF040-45-4C-NHE.
How many erase cycles can SST39LF040-45-4C-NHE endure before failure?
The SST39LF040-45-4C-NHE is rated for 100,000 program/erase cycles minimum (typical), verified per JEDEC Standard A117. This endurance applies to both sector-erase and chip-erase operations. Data retention exceeds 100 years post-erase, ensuring long-term reliability in applications like industrial firmware storage where field updates occur infrequently but must remain trustworthy over decades.
Is SST39LF040-45-4C-NHE pin-compatible with other 32-pin PLCC NOR flash devices?
Yes, the SST39LF040-45-4C-NHE conforms to JEDEC-standard pinouts for x8 parallel NOR flash memory, including identical signal assignments for A0–A18, DQ0–DQ7, CE#, OE#, WE#, VDD, and VSS. Its 32-pin PLCC footprint matches industry-standard devices such as the Intel 28F010 and AMD AM29LV040B - enabling mechanical and electrical compatibility in existing sockets.
What data protection mechanisms are built into SST39LF040-45-4C-NHE?
The SST39LF040-45-4C-NHE implements dual-layer protection: hardware features include noise/glitch immunity (<5 ns pulse rejection), VDD power-up/down detection (<1.5 V inhibit), and write-inhibit mode (CE# high, OE# low, or WE# high); software protection uses JEDEC-standard 3-byte (program) and 6-byte (erase) command sequences. Both layers are active by default and cannot be disabled - ensuring robust safeguarding of firmware in the SST39LF040-45-4C-NHE.
SST39LF040-45-4C-NHE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- SST39 MPF™
- Package/Case:
- 32-LCC (J-Lead)
- Packaging:
- Tube
- 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:
- 3V ~ 3.6V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-PLCC (11.43x13.97)
SST39LF040-45-4C-NHE FAQ
1.How can I place an order for SST39LF040-45-4C-NHE through Aetrix?
Please submit a Request for Quotation (RFQ) for SST39LF040-45-4C-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 SST39LF040-45-4C-NHE reliable?
The price and inventory of SST39LF040-45-4C-NHE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SST39LF040-45-4C-NHE is usually 5 days.
3.What payment methods are accepted for SST39LF040-45-4C-NHE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST39LF040-45-4C-NHE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST39LF040-45-4C-NHE?
SST39LF040-45-4C-NHE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST39LF040-45-4C-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 SST39LF040-45-4C-NHE?
For technical support, including SST39LF040-45-4C-NHE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SST39LF040-45-4C-NHE requirements.
6.How does Aetrix verify that SST39LF040-45-4C-NHE is sourced from the original manufacturer or authorized distributors?
All SST39LF040-45-4C-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 SST39LF040-45-4C-NHE meets industry standards.
7.What is the process for return or replacement of SST39LF040-45-4C-NHE?
All SST39LF040-45-4C-NHE units undergo pre-shipment inspection (PSI). If there is an issue with SST39LF040-45-4C-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 SST39LF040-45-4C-NHE part is unused and in its original packaging.
Return procedure for SST39LF040-45-4C-NHE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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