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Microchip Technology SST39SF040-70-4C-WHE-T
- Part No.:
- SST39SF040-70-4C-WHE-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.488", 12.40mm Width)
- Datasheet:
-
SST39SF040-70-4C-WHE-T.pdf
- Description:
- IC FLASH 4MBIT PARALLEL 32TSOP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SST39SF040-70-4C-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 4.5–5.5 V supply operation, and uniform 4 KByte sector-erase architecture. It implements SuperFlash technology for high reliability in embedded firmware storage applications requiring field-upgradable code or configuration data.
For engineers reviewing the SST39SF040-70-4C-WHE-T datasheet, SST39SF040-70-4C-WHE-T pinout, SST39SF040-70-4C-WHE-T application, or SST39SF040-70-4C-WHE-T equivalent, this page delivers verified technical context, JEDEC-compliant x8 interface timing, sector-level erase control, hardware/software data protection, and RoHS-compliant 32-pin TSOP packaging details essential for legacy system maintenance and industrial controller design.
Technical Context
This device belongs to the SST39SFx40 family of CMOS Multi-Purpose Flash (MPF) memories using proprietary SuperFlash split-gate cell technology with thick-oxide tunneling injector. It supports standard microprocessor bus interfacing via CE#, OE#, and WE# control lines, with latched address/data and TTL-compatible I/Os.
Operation relies on JEDEC-standard command sequences: three-byte load for byte-program, six-byte for sector/chip-erase, and software ID entry/exit. End-of-write detection uses Data# Polling (DQ7) or Toggle Bit (DQ6), and both hardware (VDD monitoring, noise rejection) and software data protection are implemented per JEDEC A117/A103 standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 4 Mbit (512K × 8) - supports full firmware image storage for 8-bit/16-bit microcontrollers without external address multiplexing. |
| Read Access Time | 70 ns - enables direct connection to 14 MHz system buses with no wait states in commercial temperature range. |
| Supply Voltage | 4.5–5.5 V - compatible with legacy 5 V logic systems; no auxiliary voltage required for program/erase. |
| Endurance | 100,000 program/erase cycles - sufficient for >10 years of daily firmware updates in industrial controllers. |
| Data Retention | Greater than 100 years - ensures long-term reliability in unpowered storage for medical or infrastructure equipment. |
| Sector Size | Uniform 4 KByte sectors - allows granular firmware patching without erasing entire memory space. |
| Package | 32-lead TSOP (8 mm × 14 mm) - surface-mount compatible with automated PCB assembly and thermal profile compliance. |
Pinout & Package
Package: 32-lead TSOP (8 mm × 14 mm), RoHS compliant, standard pinout per JEDEC MO-142AA.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | A0–A16 select byte location; A17 selects upper/lower half of 512K array - no address multiplexing needed. |
| DQ0–DQ7 | Data Input/Output | Bi-directional 8-bit data bus; tri-stated when CE# or OE# is high - directly interfaces with 8-bit microcontroller data bus. |
| CE# | Chip Enable | Active-low chip select; device enters standby (30 µA) when high - enables multi-device memory decoding. |
| OE# | Output Enable | Active-low output gate; controls data bus drive during read - allows shared bus arbitration with other peripherals. |
| WE# | Write Enable | Active-low write strobe; initiates byte-program or erase command sequence - synchronized with CE# for JEDEC timing compliance. |
| VDD | Power Supply | +4.5 V to +5.5 V supply - powers all internal logic and charge pumps; no external VPP required. |
| VSS | Ground | Reference return path for all signals and power - requires low-impedance PCB grounding for stable erase/write margins. |
Key Features
| Feature | Design Value |
|---|---|
| SuperFlash Technology | Split-gate cell with thick-oxide tunneling injector enables fixed 70 ms chip-erase time independent of cycle count - eliminates software de-rating over product lifetime. |
| Software Data Protection | JEDEC-compliant six-byte command sequence (e.g., 5555H/AAH → 2AAAH/55H → 5555H/80H → …) prevents accidental erase/program during power transitions. |
| End-of-Write Detection | DQ6 toggle bit and DQ7 data polling provide real-time status without timer overhead - frees CPU for concurrent tasks during 14 µs byte-program or 18 ms sector-erase. |
| Hardware Write Inhibit | VDD power-up/down detection (<2.5 V lockout), <5 ns noise rejection on WE#/CE#, and OE#-controlled inhibit prevent spurious writes - critical for automotive reset robustness. |
| JEDEC x8 Pinout Compliance | Standard 32-pin layout matches industry-wide socket footprint - enables drop-in replacement for other JEDEC-compliant 4 Mbit flash devices in existing PCBs. |
Applications
| Industrial PLC Firmware Storage | Legacy Medical Device Boot Code |
|---|---|
|
Use Scenario: Storing and updating ladder logic firmware in programmable logic controllers operating in factory environments with wide temperature swings and electrical noise. IC Role / Device Role / Timing Role: Nonvolatile code storage with sector-erase capability enabling partial firmware patches without full reflash downtime. Use Value: 100,000-cycle endurance and >100-year data retention ensure 15+ year field deployment without memory degradation in sealed enclosures. |
Use Scenario: Holding boot loader and safety-critical initialization routines in FDA-cleared diagnostic instruments where firmware integrity must be guaranteed across decades. IC Role / Device Role / Timing Role: Primary boot memory mapped to microcontroller reset vector; accessed via standard 8-bit bus at power-on. Use Value: Hardware write-inhibit and software data protection prevent corruption during brown-out conditions common in hospital-grade power supplies. |
| Automotive Body Control Module | Point-of-Sale Terminal Configuration |
|
Use Scenario: Storing vehicle-specific calibration tables and CAN message routing logic in body control units exposed to -40°C to +85°C ambient. IC Role / Device Role / Timing Role: EEPROM-replacement flash with 70 ns read timing meeting ASAM MCAL timing constraints for real-time CAN stack execution. Use Value: Single 5 V supply eliminates need for charge-pump circuitry, reducing BOM cost and board area versus serial EEPROM alternatives. |
Use Scenario: Maintaining localized language packs, tax rate tables, and peripheral driver configurations in retail terminals deployed globally with infrequent but critical updates. IC Role / Device Role / Timing Role: Field-upgradable configuration memory accessed only during service mode; erased/rewritten in 4 KByte blocks per store SKU. Use Value: Uniform 4 KByte sectors allow targeted updates without disrupting active transaction logs stored elsewhere in memory map. |
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-70REI | 4 Mbit (512K × 8), 70 ns access, 3.0 V core (3.0–3.6 V), requires VPP = 12 V for programming | Requires dual-supply design and external high-voltage generation; not pin-compatible due to different VPP pin assignment | Select only if migrating to 3 V system architecture and redesigning power delivery; not suitable for drop-in 5 V replacement. |
| MX29LV040CTTI-70G | 4 Mbit (512K × 8), 70 ns access, 3.0 V core (2.7–3.6 V), supports CFI query mode | CFI interface enables automatic parameter detection but requires additional initialization code; lacks hardware write-inhibit on VDD ramp | Prefer for new designs needing auto-configurable flash; avoid for legacy 5 V systems or where brown-out immunity is critical. |
Compared with AM29LV040B-70REI and MX29LV040CTTI-70G, the SST39SF040-70-4C-WHE-T provides native 5 V operation without VPP, superior power-rail noise immunity, and fixed erase timing - making it optimal for maintaining legacy industrial and automotive platforms without hardware modification.
Availability
SST39SF040-70-4C-WHE-T is available at Aetrix Electronics and suitable for industrial PLC firmware storage, legacy medical device boot code, automotive body control modules, and point-of-sale terminal configuration requiring stable component supply and long-term obsolescence management.
Supply support for SST39SF040-70-4C-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 memory solutions, with a focus on reliability, longevity, and embedded system integration.
The SST39SF040-70-4C-WHE-T belongs to Microchip's legacy Multi-Purpose Flash product line, designed specifically for cost-sensitive, long-lifecycle industrial and automotive applications requiring field-upgradable nonvolatile storage without complex voltage management.
FAQ
What is the maximum operating temperature range for the SST39SF040-70-4C-WHE-T?
The SST39SF040-70-4C-WHE-T is rated for industrial temperature operation from –40°C to +85°C. This specification is confirmed in Table 5 of the official Microchip datasheet DS20005022C, and applies to all DC and AC characteristics including 70 ns read access time and 100,000-cycle endurance. The "4C" suffix explicitly denotes the industrial grade.
Does the SST39SF040-70-4C-WHE-T require an external VPP voltage for programming?
No, the SST39SF040-70-4C-WHE-T does not require an external VPP voltage. It generates internal high-voltage programming pulses using its on-chip charge pump, enabled solely by the 4.5–5.5 V VDD supply. This is a defining feature of SST's SuperFlash architecture and is documented in the "Automatic Write Timing" and "Internal VPP Generation" sections of the datasheet.
How many address pins does the SST39SF040-70-4C-WHE-T have, and what is the highest address line?
The SST39SF040-70-4C-WHE-T has 18 address inputs (A0 through A17), as confirmed in Figure 3 (TSOP pinout) and Table 1 of the datasheet. A17 is the most significant address line for the 512K × 8 organization, enabling full 4 Mbit addressing without multiplexing or banking logic.
Is the SST39SF040-70-4C-WHE-T RoHS compliant?
Yes, the SST39SF040-70-4C-WHE-T is RoHS compliant. This is explicitly stated in the "Features" section of the datasheet ("All devices are RoHS compliant") and verified by Microchip's official product change notices and material declarations for the WHE-T TSOP package variant.
What command sequence is required to perform a sector erase on the SST39SF040-70-4C-WHE-T?
A six-byte software command sequence is required: 5555H/AAH → 2AAAH/55H → 5555H/80H → 5555H/AAH → 2AAAH/55H → Sector_Address/30H. This sequence is defined in Table 4 of the datasheet and activates sector-erase mode only after the sixth pulse, with sector selection determined by AMS–A12 address lines (A17–A12 for SST39SF040).
SST39SF040-70-4C-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:
- 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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-TSOP
SST39SF040-70-4C-WHE-T FAQ
1.How can I place an order for SST39SF040-70-4C-WHE-T through Aetrix?
Please submit a Request for Quotation (RFQ) for SST39SF040-70-4C-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 SST39SF040-70-4C-WHE-T reliable?
The price and inventory of SST39SF040-70-4C-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 SST39SF040-70-4C-WHE-T is usually 5 days.
3.What payment methods are accepted for SST39SF040-70-4C-WHE-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST39SF040-70-4C-WHE-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST39SF040-70-4C-WHE-T?
SST39SF040-70-4C-WHE-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST39SF040-70-4C-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 SST39SF040-70-4C-WHE-T?
For technical support, including SST39SF040-70-4C-WHE-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SST39SF040-70-4C-WHE-T requirements.
6.How does Aetrix verify that SST39SF040-70-4C-WHE-T is sourced from the original manufacturer or authorized distributors?
All SST39SF040-70-4C-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 SST39SF040-70-4C-WHE-T meets industry standards.
7.What is the process for return or replacement of SST39SF040-70-4C-WHE-T?
All SST39SF040-70-4C-WHE-T units undergo pre-shipment inspection (PSI). If there is an issue with SST39SF040-70-4C-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 SST39SF040-70-4C-WHE-T part is unused and in its original packaging.
Return procedure for SST39SF040-70-4C-WHE-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SST39SF040-70-4C-WHE-T Tags
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M24C02-WMN6TP
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AT24C02C-XHM-T
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AT21CS01-STUM10-T
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