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Microchip Technology SST39LF040-45-4C-B3KE-T
- Part No.:
- SST39LF040-45-4C-B3KE-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 48-TFBGA
- Datasheet:
-
SST39LF040-45-4C-B3KE-T.pdf
- Description:
- IC FLASH 4MBIT PARALLEL 48TFBGA
- Quantity:
- Payment:
- Shipping:
Inventory:2,948
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Product details
Overview
SST39LF040-45-4C-B3KE-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, and JEDEC-standard x8 pinout. It serves as nonvolatile program/data storage in embedded microcontroller systems requiring field-upgradable firmware.
For engineers reviewing the SST39LF040-45-4C-B3KE-T datasheet, SST39LF040-45-4C-B3KE-T pinout, SST39LF040-45-4C-B3KE-T application, or SST39LF040-45-4C-B3KE-T equivalent, key selection criteria include 45 ns read timing, 3.0–3.6 V single-supply operation, 100,000-cycle endurance, 4 KB sector architecture, and PLCC/TSOP/TBGA package compatibility for legacy and space-constrained designs.
Technical Context
This device implements a split-gate SuperFlash cell with thick-oxide tunneling injector, enabling fixed erase/program times independent of cycle count-unlike conventional flash-eliminating system-level de-rating. Its command-set architecture uses standard microprocessor write sequences with latched address/data on CE# or WE# edges.
It supports three software-controlled operations: Byte-Program (20 µs typical), Sector-Erase (18 ms typical), and Chip-Erase (70 ms typical), all verified via Toggle Bit (DQ6) or Data# Polling (DQ7). Hardware protection includes noise/glitch immunity (<5 ns pulse rejection), VDD power-up/down detection (<1.5 V inhibit), and write-inhibit mode via OE#/CE#/WE# control.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 4 Mbit (512K × 8), directly replaces 27C040 EPROMs without hardware redesign |
| Read Access Time | 45 ns max - enables direct interface with 14 MHz microcontrollers without wait states |
| Supply Voltage | 3.0–3.6 V - compatible with 3.3 V logic systems; no separate VPP required |
| Endurance | 100,000 program/erase cycles - supports frequent firmware updates in industrial controllers |
| Data Retention | >100 years - ensures long-term reliability in unattended equipment like metering or telemetry |
| Sector Size | Uniform 4 KB sectors - simplifies bootloader design and enables granular firmware patching |
| Write Detection | Toggle Bit (DQ6) and Data# Polling (DQ7) - eliminates need for external polling timers or status registers |
Pinout & Package
Package: 32-lead TSOP (8 mm × 14 mm), RoHS-compliant, surface-mountable with standard reflow profile (260°C/10 s).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | A0–A16 select byte location; A17 selects upper/lower half of 512K array (SST39LF040-specific) |
| DQ0–DQ7 | Data I/O | Bidirectional 8-bit 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 current (1 µA) when high |
| OE# | Output Enable | Active-low output gate; controls DQ bus drive; high = high-impedance state |
| WE# | Write Enable | Active-low write control; initiates command latching and internal program/erase timing |
| VDD | Power Supply | 3.0–3.6 V supply; powers core and I/O; internal charge pump generates VPP for programming |
| VSS | Ground | Reference return for all signals and power; decoupling capacitor required near pin |
| NC | No Connect | Unbonded pins (e.g., A18 in TSOP); must remain floating per datasheet Figure 3 |
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 |
| JEDEC x8 Pinout Compliance | Direct drop-in replacement for industry-standard 27C040, 29F040, and AT29C040 devices without PCB changes |
| Software Data Protection | Three-byte (program) or six-byte (erase) command sequence prevents accidental writes during power transitions |
| Hardware Write Inhibit | Automatic disable below 1.5 V VDD and rejection of sub-5 ns noise pulses ensure robustness in electrically noisy environments |
| Latched Address/Data | Eliminates need for external address/data latches in microcontroller interfaces, reducing BOM count and layout area |
Applications
| Industrial PLC Firmware Storage | Medical Device Configuration Memory |
|---|---|
Use Scenario: Storing programmable logic controller firmware updated via serial port or SD card. IC Role / Device Role / Timing Role: Nonvolatile code storage with 45 ns read access enabling real-time scan cycle execution. Use Value: 100,000-cycle endurance allows daily firmware validation; 4 KB sectors enable partial updates without full chip erase. | Use Scenario: Holding calibration coefficients and safety-critical configuration parameters in portable diagnostic equipment. IC Role / Device Role / Timing Role: Secure, long-retention parameter storage interfaced to ARM Cortex-M4 MCU via parallel bus. Use Value: >100-year data retention meets IEC 62304 Class C requirements; hardware/software write protection prevents corruption during battery swaps. |
| Automotive Body Control Module | Networking Equipment Bootloader |
Use Scenario: Storing lighting control algorithms and sensor mapping tables in 12 V automotive ECUs. IC Role / Device Role / Timing Role: Code memory operating across -40°C to +85°C with 3.0–3.6 V supply tolerance. Use Value: Single 3.3 V supply simplifies power design; 4 KB sector erase enables over-the-air update partitioning. | Use Scenario: Hosting primary bootloader and fail-safe recovery image in enterprise switches and routers. IC Role / Device Role / Timing Role: Dual-image storage with fast 45 ns read enabling sub-millisecond boot latency. Use Value: Chip-erase time of 70 ms allows rapid factory reprogramming; JEDEC pinout ensures compatibility with existing socket layouts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT29C040A-15JI | 150 ns read access; 5 V only; 10,000-cycle endurance; no internal VPP generation | Requires external 12 V VPP for programming; unsuitable for 3.3 V-only systems | Select only if legacy 5 V design and slower timing acceptable |
| SST39VF040-70-4C-B3KE | 70 ns read access; 2.7–3.6 V supply; identical density and sector architecture | Lower voltage range enables battery-powered operation but sacrifices speed in high-performance hosts | Choose when extended voltage range outweighs 45 ns timing requirement |
Compared with AT29C040A-15JI and SST39VF040-70-4C-B3KE, the SST39LF040-45-4C-B3KE-T provides optimal balance of speed (45 ns), 3.3 V compatibility, and proven endurance-making it preferred for new 3.3 V microcontroller-based designs requiring fast, reliable firmware storage.
Availability
SST39LF040-45-4C-B3KE-T is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device configuration memory, and automotive body control module applications requiring stable component supply and long-term obsolescence support.
Supply support for SST39LF040-45-4C-B3KE-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, FPGA, and memory solutions, with leadership in embedded control and secure connectivity.
The SST39LF/VF series was designed as cost-effective, pin-compatible replacements for EPROMs and earlier flash devices, targeting firmware storage in resource-constrained embedded systems where reliability, low power, and JEDEC compliance are critical.
FAQ
What is the maximum operating frequency supported by SST39LF040-45-4C-B3KE-T?
The SST39LF040-45-4C-B3KE-T does not operate at a clock frequency-it is an asynchronous parallel flash memory. Its 45 ns read access time corresponds to a maximum effective interface speed of approximately 22 MHz (1/45 ns), but actual throughput depends on microcontroller bus timing and wait-state configuration. No internal clock is required.
Does SST39LF040-45-4C-B3KE-T require an external VPP voltage for programming?
No. The SST39LF040-45-4C-B3KE-T integrates an internal charge pump that generates the high voltage needed for programming and erasing from the 3.0–3.6 V VDD supply alone. This eliminates the need for external VPP circuitry, simplifying board design and reducing component count.
How many address lines does SST39LF040-45-4C-B3KE-T use?
The SST39LF040-45-4C-B3KE-T uses 18 address lines (A0–A17) to access its 512K × 8 organization. A0–A16 select individual bytes within a 128K segment, while A17 selects between upper and lower halves of the full 512K array-confirmed in Table 1 and Figure 3 of the DS25023A datasheet.
Is SST39LF040-45-4C-B3KE-T compatible with 5 V microcontrollers?
No. The SST39LF040-45-4C-B3KE-T is specified for 3.0–3.6 V operation only. Its inputs are not 5 V tolerant, and applying 5 V may cause permanent damage. For 5 V systems, consider the SST39VF040 (2.7–3.6 V, 70 ns) with level-shifting or legacy 5 V flash alternatives like AT29C040A.
What package type is used in SST39LF040-45-4C-B3KE-T?
The SST39LF040-45-4C-B3KE-T uses a 32-lead TSOP (Thin Small Outline Package), 8 mm × 14 mm body size, with standard JEDEC pinout. This is confirmed in Figure 3 of DS25023A and matches the "B3KE" suffix per Microchip's packaging nomenclature (B3 = TSOP, K = lead-free, E = tape-and-reel).
SST39LF040-45-4C-B3KE-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- SST39 MPF™
- Package/Case:
- 48-TFBGA
- 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:
- 48-TFBGA
SST39LF040-45-4C-B3KE-T FAQ
1.How can I place an order for SST39LF040-45-4C-B3KE-T through Aetrix?
Please submit a Request for Quotation (RFQ) for SST39LF040-45-4C-B3KE-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-B3KE-T reliable?
The price and inventory of SST39LF040-45-4C-B3KE-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-B3KE-T is usually 5 days.
3.What payment methods are accepted for SST39LF040-45-4C-B3KE-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST39LF040-45-4C-B3KE-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST39LF040-45-4C-B3KE-T?
SST39LF040-45-4C-B3KE-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST39LF040-45-4C-B3KE-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-B3KE-T?
For technical support, including SST39LF040-45-4C-B3KE-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-B3KE-T requirements.
6.How does Aetrix verify that SST39LF040-45-4C-B3KE-T is sourced from the original manufacturer or authorized distributors?
All SST39LF040-45-4C-B3KE-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-B3KE-T meets industry standards.
7.What is the process for return or replacement of SST39LF040-45-4C-B3KE-T?
All SST39LF040-45-4C-B3KE-T units undergo pre-shipment inspection (PSI). If there is an issue with SST39LF040-45-4C-B3KE-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-B3KE-T part is unused and in its original packaging.
Return procedure for SST39LF040-45-4C-B3KE-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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