My Inquiry
My Account
Microchip Technology SST39SF040-70-4I-WHE-T
- Part No.:
- SST39SF040-70-4I-WHE-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.488", 12.40mm Width)
- Datasheet:
-
SST39SF040-70-4I-WHE-T.pdf
- Description:
- IC FLASH 4MBIT PARALLEL 32TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,569
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SST39SF040-70-4I-WHE-T from Microchip Technology is a 4 Mbit (512K × 8) parallel-interface Multi-Purpose Flash memory IC with 70 ns read access time, single 4.5–5.5V supply operation, and uniform 4 KByte sector-erase architecture. It implements SuperFlash technology for high reliability, supports TTL I/O compatibility, and is used in embedded firmware storage for industrial controllers and legacy BIOS modules.
For engineers reviewing the SST39SF040-70-4I-WHE-T datasheet, SST39SF040-70-4I-WHE-T pinout, SST39SF040-70-4I-WHE-T application, or SST39SF040-70-4I-WHE-T equivalent, key selection criteria include JEDEC-standard x8 pinout compliance, 100,000-cycle endurance, 100-year data retention, sector-erase timing (18 ms typ), and industrial temperature range (-40°C to +85°C).
Technical Context
This device uses SST's proprietary split-gate SuperFlash cell architecture with thick-oxide tunneling injector, enabling fixed erase/program times independent of cycle count-unlike conventional flash technologies where timing degrades over endurance life. It operates exclusively in asynchronous parallel mode with CE#/OE#/WE# control logic and latched address/data buses.
The SST39SF040-70-4I-WHE-T implements JEDEC-standard command sets including three-byte software data protection for byte-program and six-byte sequences for sector/chip-erase. End-of-write detection is supported via Data# Polling (DQ7) and Toggle Bit (DQ6), both valid after the rising edge of the fourth (program) or sixth (erase) WE# pulse.
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 | 70 ns max - enables direct connection to 14 MHz microcontrollers without wait states |
| Supply Voltage | 4.5–5.5 V - compatible with legacy 5V logic systems and eliminates need for level shifters |
| Endurance | 100,000 program/erase cycles - supports field-upgradable firmware with multi-year update cadence |
| Data Retention | >100 years - ensures long-term reliability in unpowered storage for industrial equipment |
| Sector Size | Uniform 4 KByte sectors - simplifies partitioning for bootloader, application, and parameter storage |
| Operating Temp | -40°C to +85°C - qualified for industrial-grade embedded applications without derating |
Pinout & Package
Package: 32-lead TSOP (8 mm × 14 mm), RoHS-compliant, surface-mountable with standard reflow profile.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | A0–A16 select byte location; A17 selects upper/lower half of 512K array (AMS = A17) |
| DQ0–DQ7 | Data I/O | Bidirectional 8-bit bus; tri-stated when CE# or OE# is high; latched during write |
| CE# | Chip Enable | Active-low chip select; device enters standby (30 µA) when high |
| OE# | Output Enable | Active-low output gate; controls DQ bus drive without affecting internal state |
| WE# | Write Enable | Active-low write strobe; initiates byte-program or erase command sequence on rising edge |
| VDD | Power Supply | 4.5–5.5 V core supply; includes internal VPP generation for programming |
| VSS | Ground | Reference return path for all signals and power |
| NC | No Connection | Pins 1, 16, 31 - must remain unconnected per datasheet |
Key Features
| Feature | Design Value |
|---|---|
| SuperFlash® Cell Architecture | Split-gate design with thick-oxide injector delivers stable 70 ns read and 14 µs byte-program timing across full endurance life |
| Hardware + Software Data Protection | Glitch immunity (<5 ns pulses rejected), VDD power-up/down detection, and mandatory JEDEC 3-byte/6-byte command sequences prevent accidental writes |
| Fixed Erase/Program Timing | Sector-erase (18 ms typ), chip-erase (70 ms typ), and byte-program (14 µs typ) remain constant regardless of accumulated cycles |
| JEDEC x8 Standard Compliance | Pinout and command set match industry-standard parallel flash devices, enabling drop-in replacement in existing 5V designs |
| End-of-Write Detection | DQ7 (Data# Polling) and DQ6 (Toggle Bit) provide deterministic status reporting without external timers or polling overhead |
Applications
| Industrial PLC Firmware Storage | Legacy PC BIOS Memory |
|---|---|
|
Use Scenario: Storing ladder logic programs and I/O configuration data in programmable logic controllers deployed in factory automation environments. IC Role / Device Role / Timing Role: Nonvolatile code storage with sector-erase capability allows selective updates to control algorithms without full reflash. Use Value: 4 KByte uniform sectors enable safe dual-bank firmware partitioning; 100,000-cycle endurance supports >10 years of field updates. |
Use Scenario: Holding BIOS boot code and hardware initialization routines in desktop motherboards using legacy ISA/LPC interfaces. IC Role / Device Role / Timing Role: Parallel x8 interface provides direct CPU address/data bus connection with no glue logic required. Use Value: 70 ns read access meets Intel 486/Pentium timing requirements; 5V-only operation avoids mixed-voltage design complexity. |
| Medical Device Configuration Memory | Telecom Line Card Bootloader |
|
Use Scenario: Retaining calibration parameters, user preferences, and safety-critical settings in diagnostic imaging equipment. IC Role / Device Role / Timing Role: High-reliability flash storage with >100-year data retention ensures integrity across product lifetime. Use Value: Industrial temperature rating (-40°C to +85°C) supports operation inside sealed enclosures with passive thermal management. |
Use Scenario: Hosting bootloader firmware that initializes FPGA configuration, DSP code, and communication stacks on telecom line cards. IC Role / Device Role / Timing Role: Sector-erase architecture isolates bootloader region from application updates, preventing corruption during remote upgrades. Use Value: Software Data Protection commands prevent unauthorized or partial writes during power-interrupted field updates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar parallel flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AM29LV040B-70EC | 4 Mbit, 70 ns, 3.0V core (3.0–3.6V), requires external VPP for programming | Designed for 3.3V systems; not pin-compatible due to different VPP pin assignment and voltage domain | Select only if migrating to 3.3V infrastructure and redesigning power delivery and level-shifting |
| MX29LV040CTTI-70G | 4 Mbit, 70 ns, 3.0V core (2.7–3.6V), supports CFI query mode | CFI-compliant for auto-configuration; lacks hardware write-inhibit on power-up, requiring external reset coordination | Prefer for new 3.3V designs needing standardized parameter interrogation; not suitable for direct 5V drop-in replacement |
Compared with AM29LV040B-70EC and MX29LV040CTTI-70G, the SST39SF040-70-4I-WHE-T offers native 5V operation, integrated VPP generation, and stronger hardware write-inhibit during power transitions-making it uniquely suited for retrofitting legacy 5V systems without board-level changes.
Availability
SST39SF040-70-4I-WHE-T is available at Aetrix Electronics and suitable for industrial PLC firmware storage, legacy PC BIOS modules, medical device configuration memory, and telecom line card bootloaders requiring stable component supply across extended product lifecycles.
Supply support for SST39SF040-70-4I-WHE-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 nonvolatile memory solutions, with emphasis on reliability and long-term product support.
The SST39SF040-70-4I-WHE-T belongs to Microchip's legacy parallel flash memory product line, designed specifically for cost-sensitive, 5V-based embedded systems requiring field-upgradable firmware storage with industrial temperature tolerance.
FAQ
What is the maximum operating frequency supported by SST39SF040-70-4I-WHE-T?
The SST39SF040-70-4I-WHE-T does not operate at a clock frequency-it is an asynchronous parallel flash device. Its 70 ns read access time corresponds to a maximum effective interface speed of approximately 14 MHz when interfaced with microcontrollers or FPGAs using standard address/data latching protocols. The device has no internal clock input and relies entirely on CE#, OE#, and WE# timing control per JEDEC specifications.
Does SST39SF040-70-4I-WHE-T require an external VPP voltage for programming?
No. The SST39SF040-70-4I-WHE-T integrates internal VPP generation and operates with a single 4.5–5.5V supply for both read and write operations. This eliminates the need for external high-voltage circuitry, simplifying board design and improving system reliability compared to earlier flash families requiring separate VPP pins.
How many address lines does SST39SF040-70-4I-WHE-T use?
The SST39SF040-70-4I-WHE-T uses 18 address lines (A0–A17) to access its 512K × 8 organization. A0–A16 select individual bytes within a sector, while A17 functions as the most significant address bit (AMS) to distinguish upper and lower halves of the memory array, as confirmed in Table 1 and Figure 4 of the datasheet.
Is SST39SF040-70-4I-WHE-T compatible with JEDEC-standard x8 flash command sets?
Yes. The SST39SF040-70-4I-WHE-T fully complies with JEDEC Standard JESD21-C for x8 parallel flash memories, including pinout assignment, command protocol (three-byte program, six-byte erase), and software ID entry/exit sequences. This ensures interoperability with existing BIOS, bootloader, and programming tools designed for JEDEC-compliant 5V flash devices.
What package type is used for SST39SF040-70-4I-WHE-T?
The SST39SF040-70-4I-WHE-T is packaged in a 32-lead TSOP (Thin Small Outline Package), 8 mm × 14 mm body size, with standard pinout per Figure 3 of the datasheet. The "WHE-T" suffix explicitly denotes this TSOP variant, distinguishing it from PLCC and PDIP versions of the same base part number.
SST39SF040-70-4I-WHE-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- SST39 MPF™
- Package/Case:
- 32-TFSOP (0.488", 12.40mm Width)
- 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:
- 70 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-TSOP
SST39SF040-70-4I-WHE-T FAQ
1.How can I place an order for SST39SF040-70-4I-WHE-T through Aetrix?
Please submit a Request for Quotation (RFQ) for SST39SF040-70-4I-WHE-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 SST39SF040-70-4I-WHE-T reliable?
The price and inventory of SST39SF040-70-4I-WHE-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SST39SF040-70-4I-WHE-T is usually 5 days.
3.What payment methods are accepted for SST39SF040-70-4I-WHE-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST39SF040-70-4I-WHE-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST39SF040-70-4I-WHE-T?
SST39SF040-70-4I-WHE-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST39SF040-70-4I-WHE-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 SST39SF040-70-4I-WHE-T?
For technical support, including SST39SF040-70-4I-WHE-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SST39SF040-70-4I-WHE-T requirements.
6.How does Aetrix verify that SST39SF040-70-4I-WHE-T is sourced from the original manufacturer or authorized distributors?
All SST39SF040-70-4I-WHE-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 SST39SF040-70-4I-WHE-T meets industry standards.
7.What is the process for return or replacement of SST39SF040-70-4I-WHE-T?
All SST39SF040-70-4I-WHE-T units undergo pre-shipment inspection (PSI). If there is an issue with SST39SF040-70-4I-WHE-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 SST39SF040-70-4I-WHE-T part is unused and in its original packaging.
Return procedure for SST39SF040-70-4I-WHE-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SST39SF040-70-4I-WHE-T Tags
-
M24C02-WMN6TP
STMicroelectronics
-
AT24C02C-XHM-T
Microchip Technology
-
AT21CS01-STUM10-T
Microchip Technology
-
AT24C02C-SSHM-T
Microchip Technology
-
24LC01BT-I/OT
Microchip Technology
-
M24C02-FMC6TG
STMicroelectronics
-
AT24CS02-SSHM-T
Microchip Technology
-
93LC46BT-I/OT
Microchip Technology
-
AT24C04C-SSHM-T
Microchip Technology
-
24LC01BT-I/SN
Microchip Technology
-
24AA02UIDT-I/OT
Microchip Technology
-
AT24C08C-STUM-T
Microchip Technology
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
