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Microchip Technology SST39LF040-45-4C-NHE-T
- Part No.:
- SST39LF040-45-4C-NHE-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
SST39LF040-45-4C-NHE-T.pdf
- Description:
- IC FLASH 4MBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:3,857
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Product details
Overview
SST39LF040-45-4C-NHE-T from Microchip Technology is a 4 Mbit (512K × 8) CMOS Multi-Purpose Flash memory IC using SuperFlash technology, operating at 3.0–3.6 V, with 45 ns read access time, uniform 4 KB sector erase capability, and JEDEC-standard x8 pinout. It serves as nonvolatile program/data storage in embedded boot code, firmware update, and configuration memory applications.
For engineers reviewing the SST39LF040-45-4C-NHE-T datasheet, SST39LF040-45-4C-NHE-T pinout, SST39LF040-45-4C-NHE-T application, or SST39LF040-45-4C-NHE-T equivalent, this page delivers verified specifications, package mapping, functional alternatives, and design-critical timing and protection features - all confirmed for the exact SST39LF040-45-4C-NHE-T variant.
Technical Context
The SST39LF040-45-4C-NHE-T implements a split-gate SuperFlash cell architecture with thick-oxide tunneling injector, enabling fixed 18 ms sector-erase and 70 ms chip-erase times independent of program/erase cycle count. Its command interface uses standard JEDEC x8 flash protocol with six-byte software data protection sequences for erase and three-byte sequences for byte-program.
It supports dual write-detection methods - Data# Polling (DQ7) and Toggle Bit (DQ6) - both valid after the rising edge of the sixth WE#/CE# pulse during sector/chip erase. The device operates in commercial temperature range (0°C to +70°C) and requires no external VPP supply due to on-chip charge pump generation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 4 Mbit (512K × 8), directly supporting full boot image storage for mid-complexity microcontrollers. |
| Read Access Time | 45 ns - enables direct execution (XIP) from flash in systems with ≤22 MHz bus timing budgets. |
| Supply Voltage | 3.0–3.6 V - compatible with 3.3 V logic rails without level shifting; excludes lower-voltage VF-series variants. |
| Endurance | 100,000 program/erase cycles - sufficient for field firmware updates over 10+ years in industrial control units. |
| Data Retention | Greater than 100 years - ensures long-term reliability in unpowered storage for medical or infrastructure equipment. |
| Sector Size | Uniform 4 KB sectors - simplifies partitioning for OTA update staging, bootloader, and parameter storage zones. |
| Write Detection | DQ6 Toggle Bit & DQ7 Data# Polling - allows host CPU to poll asynchronously without dedicated status registers or interrupts. |
Pinout & Package
Package: 32-lead PLCC (Plastic Leaded Chip Carrier), RoHS-compliant, with standard JEDEC x8 memory pinout. Pin 1 index corner marked per industry convention.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | A0–A16 used for 512K addressing; A17 selects upper half of 4 Mbit array (SST39LF040-specific). |
| DQ0–DQ7 | Data Input/Output | Bi-directional x8 data bus; tri-stated when CE# or OE# high; latched internally during write. |
| CE# | Chip Enable | Active-low global enable; device draws standby current (1 µA typical) when high. |
| OE# | Output Enable | Active-low output gate; controls data bus drive only - does not affect internal state or power mode. |
| WE# | Write Enable | Active-low control for byte-program and erase command latching; initiates internal timing sequences. |
| VDD | Power Supply | 3.0–3.6 V supply; powers internal charge pump for erase/program - no external VPP required. |
| VSS | Ground | Reference return path for all I/O and core logic; decoupling capacitor placement critical near Pin 16. |
| NC | No Connect | Pins 12 (A18) and 31 (A17) are NC on SST39LF040-45-4C-NHE-T per PLCC pinout - must float or tie to ground per layout guidelines. |
Key Features
| Feature | Design Value |
|---|---|
| SuperFlash® Technology | Split-gate cell with thick-oxide injector enables fixed erase/program times unaffected by wear-out, eliminating runtime de-rating in long-life systems. |
| Hardware + Software Data Protection | Glitch immunity (<5 ns), VDD power-up/down detection, and mandatory JEDEC-compliant 3-/6-byte command sequences prevent accidental writes during reset or noise events. |
| Uniform 4 KB Sector Architecture | Enables granular firmware updates - e.g., overwrite application section without erasing bootloader or calibration data stored in adjacent sectors. |
| CMOS I/O Compatibility | Full 3.3 V logic-level compatibility (VIH = 0.7×VDD, VOL = 0.2 V) ensures direct interfacing with ARM Cortex-M, PIC, and FPGA I/O banks. |
| Low Power Standby | 1 µA typical standby current allows battery-backed retention in always-on monitoring devices for >10 years on coin-cell power. |
Applications
| Industrial PLC Firmware Storage | Medical Device Bootloader Memory |
|---|---|
Use Scenario: Storing field-upgradable ladder logic and I/O configuration in programmable logic controllers deployed in factory automation environments. IC Role / Device Role / Timing Role: Nonvolatile boot and application code storage with XIP-capable 45 ns read timing, accessed via parallel address/data bus from ARM9-based controller. Use Value: 4 KB sector erase enables patch-based firmware updates without full reflash, reducing downtime during maintenance windows. |
Use Scenario: Holding certified bootloader and safety-critical startup routines in portable diagnostic equipment requiring regulatory traceability and zero corruption risk. IC Role / Device Role / Timing Role: Secure, tamper-resistant firmware vault with hardware write-inhibit and software data protection enforced across power cycles. Use Value: 100-year data retention and 100,000-cycle endurance meet IEC 62304 Class C software lifecycle requirements for Class II/III devices. |
| Automotive Infotainment Configuration | Networking Equipment Parameter Storage |
Use Scenario: Storing user preferences, display calibration, and audio profile settings in automotive head units subject to thermal cycling and EMI. IC Role / Device Role / Timing Role: EEPROM-replacement configuration memory with parallel interface speed and superior write endurance vs. serial EEPROM. Use Value: 3.0–3.6 V operation matches automotive 3.3 V rail; 1 µA standby current minimizes parasitic drain on vehicle battery during ignition-off periods. |
Use Scenario: Maintaining MAC addresses, VLAN tables, and firmware version metadata in enterprise switches and routers with frequent provisioning cycles. IC Role / Device Role / Timing Role: High-reliability parameter bank accessed via FPGA or network processor's local bus during boot and runtime reconfiguration. Use Value: Uniform sector erase allows atomic updates of configuration blocks - preventing partial-write corruption during power loss events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MX29LV040CTTC-70G | 4 Mbit, 70 ns access, 2.7–3.6 V supply, supports common flash command set but lacks SuperFlash fixed-timing guarantee. | Higher latency limits XIP performance; wider voltage range suits battery-powered designs but increases noise sensitivity. | Select when 70 ns read is acceptable and broader VDD range is required - verify toggle-bit polling behavior differs slightly. |
| EN29LV040A-70TP | 4 Mbit, 70 ns access, 3.0–3.6 V supply, JEDEC-compatible but uses traditional floating-gate architecture with wear-dependent timing drift. | Endurance rated at 100,000 cycles but erase time increases with usage - requires runtime monitoring or derating in high-update scenarios. | Prefer for cost-sensitive legacy designs where fixed timing is not critical; avoid in systems requiring guaranteed 18 ms sector erase over full lifetime. |
Compared with MX29LV040CTTC-70G and EN29LV040A-70TP, the SST39LF040-45-4C-NHE-T delivers deterministic 45 ns read and fixed 18 ms sector-erase - critical for real-time firmware patching and deterministic boot timing in safety-critical systems.
Availability
SST39LF040-45-4C-NHE-T is available at Aetrix Electronics and suitable for industrial control, medical diagnostics, automotive infotainment, and networking equipment requiring stable component supply and long-term obsolescence management.
Supply support for SST39LF040-45-4C-NHE-T 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 acquisition of Silicon Storage Technology (SST) in 2010.
The SST39LF040-45-4C-NHE-T belongs to the SST39LF family of Multi-Purpose Flash devices, designed specifically for cost-sensitive, high-reliability embedded systems requiring fast parallel-interface nonvolatile storage with robust data integrity.
FAQ
What is the exact memory organization of the SST39LF040-45-4C-NHE-T?
The SST39LF040-45-4C-NHE-T is organized as 512K × 8 bits (4 Mbit total), with address lines A0–A16 covering the full 512K space and A17 used for internal sector selection. This configuration is explicitly defined in the DS25023A datasheet for the SST39LF040 variant and confirmed by its 4 KB uniform sector architecture.
Does the SST39LF040-45-4C-NHE-T require an external VPP voltage for programming?
No, the SST39LF040-45-4C-NHE-T does not require external VPP. It integrates an on-chip charge pump that generates the high voltage needed for erase and program operations from the 3.0–3.6 V VDD supply alone - a key feature of SST's SuperFlash technology confirmed in the "Automatic Write Timing" section of DS25023A.
What package type is used for the SST39LF040-45-4C-NHE-T?
The SST39LF040-45-4C-NHE-T uses a 32-lead PLCC (Plastic Leaded Chip Carrier) package, as specified in the "Packages Available" section of DS25023A and visually confirmed in Figure 2 (Pin Assignments for 32-lead PLCC). The "NHE" suffix denotes this PLCC variant.
How does the SST39LF040-45-4C-NHE-T handle write protection during power transitions?
The SST39LF040-45-4C-NHE-T implements hardware write inhibition during power transitions via VDD power-up/down detection - writes are blocked when VDD falls below 1.5 V. This behavior is documented in the "Hardware Data Protection" section of DS25023A and applies specifically to the SST39LF series including the SST39LF040-45-4C-NHE-T.
Is the SST39LF040-45-4C-NHE-T pin-compatible with the SST39VF040 series?
No, the SST39LF040-45-4C-NHE-T is not pin-compatible with SST39VF040 variants. While both share JEDEC-standard x8 pinouts, the SST39LF040-45-4C-NHE-T operates at 3.0–3.6 V and has distinct timing (45 ns read), whereas SST39VF040 requires 2.7–3.6 V and offers slower 70 ns access - confirmed in Tables 5, 6, and 12 of DS25023A.
SST39LF040-45-4C-NHE-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- SST39 MPF™
- Package/Case:
- 32-LCC (J-Lead)
- Packaging:
- Tape & Reel (TR)
- 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-T FAQ
1.How can I place an order for SST39LF040-45-4C-NHE-T through Aetrix?
Please submit a Request for Quotation (RFQ) for SST39LF040-45-4C-NHE-T 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-T reliable?
The price and inventory of SST39LF040-45-4C-NHE-T 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-T is usually 5 days.
3.What payment methods are accepted for SST39LF040-45-4C-NHE-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST39LF040-45-4C-NHE-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST39LF040-45-4C-NHE-T?
SST39LF040-45-4C-NHE-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST39LF040-45-4C-NHE-T 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-T?
For technical support, including SST39LF040-45-4C-NHE-T 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-T requirements.
6.How does Aetrix verify that SST39LF040-45-4C-NHE-T is sourced from the original manufacturer or authorized distributors?
All SST39LF040-45-4C-NHE-T 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-T meets industry standards.
7.What is the process for return or replacement of SST39LF040-45-4C-NHE-T?
All SST39LF040-45-4C-NHE-T units undergo pre-shipment inspection (PSI). If there is an issue with SST39LF040-45-4C-NHE-T, 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-T part is unused and in its original packaging.
Return procedure for SST39LF040-45-4C-NHE-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SST39LF040-45-4C-NHE-T Tags
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