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Microchip Technology SST39LF402C-55-4C-B3KE
- Part No.:
- SST39LF402C-55-4C-B3KE
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 48-TFBGA
- Datasheet:
-
SST39LF402C-55-4C-B3KE.pdf
- Description:
- IC FLASH 4MBIT PARALLEL 48TFBGA
- Quantity:
- Payment:
- Shipping:
Inventory:2,099
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Product details
Overview
SST39LF402C-55-4C-B3KE from Microchip is a 4 Mbit (256K × 16) CMOS Multi-Purpose Flash Plus memory IC with SuperFlash® technology, designed for embedded firmware storage and configuration data retention in industrial controllers and communication modules. It operates at 3.0–3.6 V, delivers 55 ns read access time, supports hardware block protection on the top 8 KWord boot sector, and features erase-suspend/resume capability for real-time system responsiveness.
For engineers reviewing the SST39LF402C-55-4C-B3KE datasheet, SST39LF402C-55-4C-B3KE pinout, SST39LF402C-55-4C-B3KE application, or SST39LF402C-55-4C-B3KE equivalent, this page provides verified technical context, JEDEC-compliant x16 interface details, boot-block protection mapping, and validated alternative flash parts for legacy design refresh or supply continuity planning.
Technical Context
This device implements a split-gate SuperFlash® cell architecture with thick-oxide tunneling injector, enabling fixed 7 µs word-program and 18 ms sector/block-erase times independent of cycle count-eliminating software de-rating over lifetime. It uses standard JEDEC x16 asynchronous parallel interface with CE#, OE#, WE#, RY/BY#, WP#, and RST# control signals.
It supports three write-status detection methods: Data# Polling (DQ7), Toggle Bits (DQ6/DQ2), and open-drain Ready/Busy# output requiring external 10 kΩ–100 kΩ pull-up. The 48-ball WFBGA (4 mm × 6 mm) package matches JEDEC MO-249AC footprint and is RoHS compliant.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 4 Mbit (256K × 16 organization), directly maps to 512 KB of 16-bit addressable space |
| Read Access Time | 55 ns maximum - enables direct connection to 16-bit microcontrollers running ≤18 MHz bus clocks without wait states |
| Supply Voltage | 3.0–3.6 V - compatible with 3.3 V logic systems; excludes 2.7 V operation supported by VF-series variants |
| Endurance | 100,000 program/erase cycles - sufficient for field firmware updates over 10+ years in industrial deployments |
| Data Retention | Greater than 100 years - ensures long-term reliability in unpowered storage applications |
| Power Consumption | 5 mA active current (typical at 5 MHz); 3 µA standby/auto-low-power mode - reduces system-level quiescent power |
| Block Protection | Top 8 KWord (0x3E000–0x3FFFF) protected when WP# = low - safeguards boot code against accidental overwrite |
Pinout & Package
Package: 48-ball WFBGA (4 mm × 6 mm, MO-249AC compliant), bottom-side ball layout per Figure 4 in DS20005053B.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | 18-bit address bus supporting full 256K-word addressing; AMS = A17 for sector/block selection |
| DQ0–DQ15 | Data I/O | 16-bit bidirectional data bus with internal latching; tri-stated when CE# or OE# high |
| CE# | Chip Enable | Active-low chip select; device enters standby when high; required low for all operations |
| OE# | Output Enable | Active-low output gate; controls data bus drive during read; no effect on write/erase |
| WE# | Write Enable | Active-low control for write cycles; latches address/data edges; initiates internal timing sequences |
| WP# | Write Protect | Active-low hardware lock for top 8 KWord boot block; floating = internally pulled high = unprotected |
| RST# | Reset | Active-low hardware reset; terminates ongoing operations and forces return to read mode |
| RY/BY# | Ready/Busy# | Open-drain status output; low = internal program/erase in progress; requires external pull-up |
| VDD | Power Supply | 3.0–3.6 V supply; powers core logic and SuperFlash® array; decoupling capacitor required |
| VSS | Ground | Reference ground for all I/O and core circuits; multiple VSS balls ensure low-impedance return path |
| NC | No Connection | Unbonded balls (e.g., A2, C1, D1, E1, F1, G1, H1, J1, K1, L1, A6, B6, C6, D6, E6, F6, G6, H6, J6, K6, L6) - must remain unconnected |
Key Features
| Feature | Design Value |
|---|---|
| Erase-Suspend/Resume | Allows temporary interruption of sector/block erase to read or program other non-suspended regions - critical for real-time OS interrupt handling |
| Security ID Space | 128-bit factory-programmed ID + 128-word user-programmable segment - enables secure device authentication and traceability |
| Auto Low Power Mode | Reduces active read current from 5 mA to 3 µA after valid read access - cuts dynamic power by >99% during idle polling |
| Uniform Sector Architecture | 2 KWord sectors (16 KB each) enable fine-grained firmware partitioning and partial update without full chip erase |
| JEDEC Standard Compliance | Fully compatible with JEDEC-standard x16 flash pinouts and command sets - simplifies migration from legacy parallel NOR devices |
Applications
| Industrial PLC Firmware Storage | Telecom Baseband Configuration |
|---|---|
|
Use Scenario: Storing boot loader, FPGA configuration bitstreams, and runtime parameter tables in programmable logic controllers operating in harsh temperature environments. IC Role / Device Role / Timing Role: Nonvolatile firmware storage with deterministic 55 ns read latency and hardware write protection to prevent corruption during brown-out events. Use Value: Top-boot block protection ensures bootloader integrity; 100-year data retention eliminates field recalibration; 3.0–3.6 V operation aligns with industrial 3.3 V rails. |
Use Scenario: Holding calibration coefficients, RF profile settings, and protocol stack parameters in LTE small-cell baseband processors requiring frequent field updates. IC Role / Device Role / Timing Role: Configuration memory with erase-suspend capability to allow real-time parameter reads during background firmware patching. Use Value: 18 ms sector erase enables rapid configuration reload; Security ID supports anti-counterfeiting; WFBGA package meets space-constrained RF module layouts. |
| Medical Diagnostic Device Boot Code | Automotive Infotainment System BIOS |
|
Use Scenario: Securing boot firmware and regulatory compliance logs in portable ultrasound and ECG analyzers subject to IEC 62304 requirements. IC Role / Device Role / Timing Role: Trusted boot memory with factory-programmed Security ID and hardware WP# lock to meet medical device traceability mandates. Use Value: 100,000-cycle endurance supports lifetime firmware validation cycles; RoHS/WFBGA compatibility satisfies medical PCB assembly standards. |
Use Scenario: Storing UEFI-compatible BIOS images and audio codec initialization tables in automotive head units with ASIL-B functional safety constraints. IC Role / Device Role / Timing Role: High-reliability boot memory with RST#-driven hard reset and top-block protection to prevent unauthorized BIOS modification. Use Value: Fixed 7 µs program time ensures predictable flash update windows; 3.6 V max rating accommodates automotive load-dump transients. |
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 |
|---|---|---|---|
| SST39VF402C-70-4C-B3KE | Wider voltage range (2.7–3.6 V); slower 70 ns read access; same 48-ball WFBGA package and pinout | Supports lower-voltage battery-backed systems but adds ~15 ns read latency - unsuitable for tight-timing 18 MHz bus interfaces | Select only if system operates below 3.0 V or requires extended voltage margin; otherwise SST39LF402C-55-4C-B3KE offers superior speed at 3.3 V. |
| MX29LV400CTTI-70G | 4 Mbit x16, 70 ns access, 2.7–3.6 V, 48-TSOP package - no WFBGA option; lacks erase-suspend and Security ID | Legacy TSOP footprint only; no advanced features for real-time or security-critical use cases | Use for cost-sensitive, space-tolerant designs where WFBGA is unnecessary and erase-suspend/Security ID are not required. |
Compared with SST39VF402C-70-4C-B3KE and MX29LV400CTTI-70G, the SST39LF402C-55-4C-B3KE delivers faster 55 ns read performance at 3.3 V, includes erase-suspend for deterministic real-time behavior, and provides factory-locked Security ID - making it optimal for compact, safety-aware, and update-capable embedded systems.
Availability
SST39LF402C-55-4C-B3KE is available at Aetrix Electronics and suitable for industrial PLC firmware storage, telecom baseband configuration, medical diagnostic boot code, and automotive infotainment BIOS requiring stable component supply across multi-year production cycles.
Supply support for SST39LF402C-55-4C-B3KE 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 devices, and memory solutions, with leadership in flash IP and embedded security.
The SST39LF402C-55-4C-B3KE belongs to Microchip's Multi-Purpose Flash Plus (MPF+) family, engineered for high-reliability embedded firmware and configuration storage in industrial, medical, and communications equipment.
FAQ
What is the exact memory organization of the SST39LF402C-55-4C-B3KE?
The SST39LF402C-55-4C-B3KE is organized as 256K × 16, delivering 4 Mbit (512 KB) of addressable storage space. Its 18 address lines (A0–A17) support full linear addressing, and the 16 data lines (DQ0–DQ15) enable byte- and word-level access. This matches JEDEC-standard x16 parallel NOR flash architecture and is distinct from x8 or stacked-die configurations.
Does the SST39LF402C-55-4C-B3KE support hardware write protection for the boot sector?
Yes, the SST39LF402C-55-4C-B3KE supports top-block hardware protection: when WP# is driven low, the top 8 KWord (0x3E000–0x3FFFF) boot sector is locked against program and erase operations. This protects bootloader code from accidental corruption. If WP# is left floating, an internal pull-up holds it high, disabling protection.
What package type does the SST39LF402C-55-4C-B3KE use, and is it RoHS compliant?
The SST39LF402C-55-4C-B3KE uses a 48-ball WFBGA package measuring 4 mm × 6 mm (MO-249AC footprint). All solder balls are lead-free, and the device is fully RoHS compliant per EU Directive 2011/65/EU, with no exemptions required for lead or halogens.
How does the SST39LF402C-55-4C-B3KE indicate completion of a program or erase operation?
The SST39LF402C-55-4C-B3KE provides three concurrent status mechanisms: Data# Polling (DQ7 toggles until completion), Toggle Bits (DQ6 and DQ2 alternate during operation), and Ready/Busy# (RY/BY# open-drain output pulled low during internal cycles). All are valid after defined WE# edge counts per operation type.
Can the SST39LF402C-55-4C-B3KE be used in systems requiring field firmware updates?
Yes - the SST39LF402C-55-4C-B3KE supports in-system programming via standard JEDEC commands, including sector/block erase, word-program, and erase-suspend/resume. Its 100,000-cycle endurance and >100-year data retention make it suitable for repeated field updates in deployed equipment.
SST39LF402C-55-4C-B3KE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- SST39 MPF™
- Package/Case:
- 48-TFBGA
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- FLASH
- Technology:
- FLASH
- Memory Size:
- 4Mbit
- Memory Organization:
- 256K x 16
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 10µs
- 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:
- 48-TFBGA (6x8)
SST39LF402C-55-4C-B3KE FAQ
1.How can I place an order for SST39LF402C-55-4C-B3KE through Aetrix?
Please submit a Request for Quotation (RFQ) for SST39LF402C-55-4C-B3KE 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 SST39LF402C-55-4C-B3KE reliable?
The price and inventory of SST39LF402C-55-4C-B3KE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SST39LF402C-55-4C-B3KE is usually 5 days.
3.What payment methods are accepted for SST39LF402C-55-4C-B3KE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST39LF402C-55-4C-B3KE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST39LF402C-55-4C-B3KE?
SST39LF402C-55-4C-B3KE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST39LF402C-55-4C-B3KE 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 SST39LF402C-55-4C-B3KE?
For technical support, including SST39LF402C-55-4C-B3KE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SST39LF402C-55-4C-B3KE requirements.
6.How does Aetrix verify that SST39LF402C-55-4C-B3KE is sourced from the original manufacturer or authorized distributors?
All SST39LF402C-55-4C-B3KE 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 SST39LF402C-55-4C-B3KE meets industry standards.
7.What is the process for return or replacement of SST39LF402C-55-4C-B3KE?
All SST39LF402C-55-4C-B3KE units undergo pre-shipment inspection (PSI). If there is an issue with SST39LF402C-55-4C-B3KE, 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 SST39LF402C-55-4C-B3KE part is unused and in its original packaging.
Return procedure for SST39LF402C-55-4C-B3KE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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