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Microchip Technology SST39LF040-55-4C-NHE
- Part No.:
- SST39LF040-55-4C-NHE
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
SST39LF040-55-4C-NHE.pdf
- Description:
- IC FLASH 4MBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:553
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Product details
Overview
SST39LF040-55-4C-NHE from Microchip Technology is a 4-Mbit (512K × 8) CMOS Multi-Purpose Flash memory IC with 55 ns read access time, single 3.0V–3.6V supply operation, and uniform 4-Kbyte sector erase architecture. It delivers 100,000 write/erase cycles endurance and >100-year data retention, targeting firmware storage in industrial control panels requiring field-upgradable nonvolatile code storage.
For engineers reviewing the SST39LF040-55-4C-NHE datasheet, SST39LF040-55-4C-NHE pinout, SST39LF040-55-4C-NHE application, or SST39LF040-55-4C-NHE equivalent, key selection criteria include its 3.0V–3.6V VDD range, JEDEC-standard x8 parallel interface, 32-lead PLCC/TSOP packaging, and SuperFlash® technology enabling fixed 14 µs byte program time and 70 ms chip erase time.
Technical Context
This device implements a split-gate SuperFlash® cell architecture with thick-oxide tunneling injector for enhanced reliability and manufacturability. Its control logic supports JEDEC-standard command sets-including three-byte software data protection for byte program and six-byte sequences for sector/chip erase-ensuring compatibility with legacy 8-bit microcontroller bus interfaces.
Read operations require simultaneous CE# and OE# low assertion, while write status detection uses hardware-supported Data# Polling (DQ7) and Toggle Bit (DQ6) mechanisms. The memory array is organized as 512K × 8 with AMS = A18 addressing, supporting sector-select via A0–A12 and block-select via A0–A16 per JEDEC pinout conventions.
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 | 55 ns maximum - enables direct execution from flash (XIP) at up to ~14 MHz system clock |
| Supply Voltage | 3.0V–3.6V - compatible with standard 3.3V logic rails without level-shifting |
| Endurance | 100,000 program/erase cycles - supports frequent firmware updates over product lifetime |
| Data Retention | >100 years - ensures long-term reliability in unpowered storage applications |
| Byte Program Time | 14 µs typical - reduces firmware patch latency during field upgrades |
| Sector Erase Time | 18 ms typical - allows selective reprogramming of 4-Kbyte functional blocks without full chip erase |
Pinout & Package
Package: 32-lead PLCC (plastic leaded chip carrier) and 32-lead TSOP (thin small-outline package), both RoHS-compliant and JEDEC-standard footprint compatible.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | A0–A17 provide full 512K-word addressing; AMS = A18 selects most significant address for sector/block commands |
| DQ0–DQ7 | Data I/O | 8-bit bidirectional data bus with tri-state output controlled by CE# and OE#; latched internally during writes |
| CE# | Chip Enable | Active-low chip select; device enters standby mode (1 µA) when high, enabling low-power system sleep states |
| OE# | Output Enable | Active-low output gate; decouples data bus from memory outputs during read cycles to prevent contention |
| WE# | Write Enable | Active-low write strobe; initiates byte program, sector erase, or chip erase upon valid command sequence |
| VDD | Power Supply | 3.0V–3.6V supply input; internal VPP generation eliminates need for external high-voltage programming supply |
| VSS | Ground | Reference ground for all digital and analog circuitry; must be low-impedance connection for stable erase/write timing |
| NC | No Connection | Pins 1, 6, 9, 29, and 30 are unconnected per PLCC/TSOP pinouts; must remain floating or grounded per board layout rules |
Key Features
| Feature | Design Value |
|---|---|
| SuperFlash® Technology | Fixed 14 µs byte program and 70 ms chip erase times independent of wear level - eliminates software derating over product lifetime |
| Uniform 4-Kbyte Sectors | Enables granular firmware partitioning (e.g., bootloader, application, config) with independent erase control per sector |
| Hardware + Software Data Protection | Prevents accidental writes during power-up/down via noise/glitch filtering, VDD monitoring, and mandatory JEDEC command sequences |
| CMOS I/O Compatibility | Direct interface with 3.3V microcontrollers without level shifters; VIH = 0.7VDD, VOL = 0.2V ensures robust noise margins |
| JEDEC Standard Pinout & Commands | Drop-in replacement for legacy x8 parallel flash devices; simplifies migration from older SST or third-party parts |
Applications
| Industrial PLC Firmware Storage | Medical Device Configuration Memory |
|---|---|
Use Scenario: Storing programmable logic controller firmware that requires periodic field updates via USB or Ethernet interface. IC Role / Device Role / Timing Role: Nonvolatile code storage with XIP-capable 55 ns read access, enabling real-time deterministic execution without RAM copy. Use Value: 100,000-cycle endurance supports 10+ years of quarterly firmware patches; 4-Kbyte sectors allow updating only modified function blocks. | Use Scenario: Holding calibrated sensor offsets and user-defined alarm thresholds in portable diagnostic equipment. IC Role / Device Role / Timing Role: Configuration memory accessed infrequently but requiring guaranteed 100-year data retention under battery-backed conditions. Use Value: >100-year retention eliminates recalibration schedules; 3.0V–3.6V VDD range matches medical-grade 3.3V power supplies. |
| Automotive Infotainment Bootloader | Networking Equipment Image Storage |
Use Scenario: Storing secure bootloader code that validates signed application images before loading into RAM. IC Role / Device Role / Timing Role: Trusted boot storage with hardware write-inhibit during power transitions preventing corruption during vehicle ignition cycles. Use Value: VDD power-up/down detection and WE#/CE# glitch protection ensure zero corrupted boots across 100,000 cold-start events. | Use Scenario: Holding dual firmware images (active/backup) in enterprise switches for zero-downtime failover updates. IC Role / Device Role / Timing Role: Dual-image storage with sector-level erase enabling atomic swap between versions using hardware status flags. Use Value: 18 ms sector erase time enables sub-100ms image switching; JEDEC command set integrates with existing flash management drivers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT49BV040 | 4-Mbit, 55 ns, 3.0V–3.6V, but uses different command set and lacks SuperFlash® fixed-timing guarantee | Requires driver modification for erase/write status polling; no hardware VPP generation | Select when legacy AT49-series ecosystem compatibility is required and timing predictability is secondary |
| SST39VF040-70-4C-NHE | Same density and pinout, but 2.7V–3.6V VDD range and 70 ns read access time | Better low-voltage operation for battery-powered systems; slower read speed limits XIP performance | Select for portable applications needing wider voltage tolerance where 14 MHz bus timing is not critical |
Compared with AT49BV040 and SST39VF040-70-4C-NHE, the SST39LF040-55-4C-NHE provides superior timing determinism (fixed 14 µs program time), tighter 55 ns read access for high-speed XIP, and integrated VPP generation-making it optimal for industrial control and automotive bootloader applications demanding predictable flash behavior across temperature and wear.
Availability
SST39LF040-55-4C-NHE is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device configuration memory, automotive infotainment bootloader, networking equipment image storage, and embedded system BIOS applications requiring stable component supply and long-term obsolescence support.
Supply support for SST39LF040-55-4C-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 Inc. is a global semiconductor company specializing in microcontrollers, analog components, and memory solutions, with a focus on embedded control and connectivity.
The SST39LF/VF series is designed for cost-effective, high-reliability nonvolatile code and data storage in resource-constrained embedded systems, leveraging proprietary SuperFlash® technology to deliver industry-leading endurance and retention.
FAQ
What is the memory organization of the SST39LF040-55-4C-NHE?
The SST39LF040-55-4C-NHE is organized as 512K × 8 (4 Mbit), with address lines A0–A17 supporting full array access and AMS = A18 used for sector/block selection in erase commands. This structure enables direct mapping to 512 KB of contiguous storage space for firmware or configuration data in 8-bit microcontroller systems.
Does the SST39LF040-55-4C-NHE support both PLCC and TSOP packages?
Yes, the SST39LF040-55-4C-NHE is offered in both 32-lead PLCC and 32-lead TSOP packages, sharing identical pinouts and electrical specifications. The NHE suffix denotes the PLCC variant, while the TSOP version uses an NHE-equivalent marking; both comply with JEDEC standards and RoHS requirements.
How does the SST39LF040-55-4C-NHE handle write operation completion detection?
The SST39LF040-55-4C-NHE supports two hardware-assisted methods: Data# Polling (DQ7 toggles complement state until completion) and Toggle Bit (DQ6 alternates logic levels during operation). Both are valid after the fourth WE# pulse for byte program and sixth pulse for erase, enabling efficient polling without dedicated status registers.
What voltage range is required for reliable operation of the SST39LF040-55-4C-NHE?
The SST39LF040-55-4C-NHE requires a 3.0V–3.6V supply (VDD) for all operations including read, program, and erase. Operation below 3.0V is not guaranteed; the device incorporates VDD power-up/down detection to inhibit writes when voltage falls below 1.5V, preventing corruption during brown-out conditions.
Is the SST39LF040-55-4C-NHE compatible with standard JEDEC x8 flash command sets?
Yes, the SST39LF040-55-4C-NHE fully conforms to JEDEC-standard pin assignments and command protocols, including three-byte software data protection for byte program and six-byte sequences for sector/chip erase. This ensures drop-in compatibility with existing flash controllers and firmware drivers designed for JEDEC-compliant x8 parallel flash devices.
SST39LF040-55-4C-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:
- 3V ~ 3.6V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-PLCC (11.43x13.97)
SST39LF040-55-4C-NHE FAQ
1.How can I place an order for SST39LF040-55-4C-NHE through Aetrix?
Please submit a Request for Quotation (RFQ) for SST39LF040-55-4C-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 SST39LF040-55-4C-NHE reliable?
The price and inventory of SST39LF040-55-4C-NHE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SST39LF040-55-4C-NHE is usually 5 days.
3.What payment methods are accepted for SST39LF040-55-4C-NHE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST39LF040-55-4C-NHE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST39LF040-55-4C-NHE?
SST39LF040-55-4C-NHE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST39LF040-55-4C-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 SST39LF040-55-4C-NHE?
For technical support, including SST39LF040-55-4C-NHE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SST39LF040-55-4C-NHE requirements.
6.How does Aetrix verify that SST39LF040-55-4C-NHE is sourced from the original manufacturer or authorized distributors?
All SST39LF040-55-4C-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 SST39LF040-55-4C-NHE meets industry standards.
7.What is the process for return or replacement of SST39LF040-55-4C-NHE?
All SST39LF040-55-4C-NHE units undergo pre-shipment inspection (PSI). If there is an issue with SST39LF040-55-4C-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 SST39LF040-55-4C-NHE part is unused and in its original packaging.
Return procedure for SST39LF040-55-4C-NHE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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