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Microchip Technology SST39SF020A-45-4C-WHE
- Part No.:
- SST39SF020A-45-4C-WHE
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.488", 12.40mm Width)
- Datasheet:
-
SST39SF020A-45-4C-WHE.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 32TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,949
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Product details
Overview
SST39SF020A-45-4C-WHE from Microchip Technology is a 2 Mbit (256K × 8) CMOS Multi-Purpose Flash memory IC with single 4.5–5.5V supply operation, 55 ns read access time, and JEDEC-standard x8 parallel interface. It features uniform 4 KByte sector-erase architecture, 100,000 program/erase endurance cycles, and >100 years data retention - deployed in embedded firmware storage for industrial controllers requiring field-upgradable code.
For engineers reviewing the SST39SF020A-45-4C-WHE datasheet, SST39SF020A-45-4C-WHE pinout, SST39SF020A-45-4C-WHE application, or SST39SF020A-45-4C-WHE equivalent, this page delivers verified package mapping (32-lead PLCC), JEDEC-compliant command set support, sector-erase timing (18 ms typ), byte-program timing (14 µs typ), and hardware/software data protection implementation details critical for secure boot and configuration memory design.
Technical Context
The SST39SF020A-45-4C-WHE implements SST's proprietary SuperFlash split-gate cell technology with thick-oxide tunneling injector, enabling fixed erase/program times independent of cycle count - eliminating system-level de-rating required by conventional flash. Its control logic interprets standard microprocessor write sequences to execute Byte-Program, Sector-Erase (via 6-byte SDP command), and Chip-Erase operations using CE#, OE#, and WE# signals.
It supports two end-of-write detection methods: Data# Polling (DQ7 toggles complement-to-true on completion) and Toggle Bit (DQ6 alternates until operation finishes). Address latching occurs on the falling edge of CE# or WE# (whichever is later), while data latching occurs on the rising edge (whichever is earlier), ensuring compatibility with asynchronous bus timing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Mbit (256K × 8) - provides sufficient space for bootloader + application firmware in resource-constrained 8-bit/16-bit microcontroller systems. |
| Read Access Time | 55 ns - enables direct connection to high-speed 8051, Z80, or 68K-based buses without wait-state insertion. |
| Supply Voltage | 4.5–5.5 V - operates from standard 5 V rail with ±10% tolerance; no external VPP generator required due to internal charge pump. |
| Endurance | 100,000 program/erase cycles - supports frequent field updates in telemetry gateways or programmable logic controllers. |
| Data Retention | >100 years at 25°C - ensures long-term reliability in unattended infrastructure equipment (e.g., remote sensors, utility meters). |
| Sector Size | Uniform 4 KByte sectors - allows granular firmware partitioning (e.g., separate boot, config, and app sections) without cross-sector erasure. |
| Write Detection | Data# Polling (DQ7) and Toggle Bit (DQ6) - enables interrupt-driven or polling-based host software to synchronize writes without fixed delays. |
Pinout & Package
Package: 32-lead Plastic Leaded Chip Carrier (PLCC), RoHS compliant, 1.27 mm pitch, body size 11.43 mm × 11.43 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A16 | Address Inputs | 17-bit address bus (A0–A16) selects one of 131,072 bytes; A16 is MSB for 256K × 8 addressing. |
| DQ0–DQ7 | Data Input/Output | 8-bit bidirectional data bus; tri-stated when CE# or OE# is high; latched internally during write cycles. |
| CE# | Chip Enable | Active-low chip select; device enters standby mode (30 µA) when high; required low for all operations. |
| OE# | Output Enable | Active-low output gate; controls DQ bus drive during read; high-Z state prevents bus contention. |
| WE# | Write Enable | Active-low write strobe; initiates latching of address/data and triggers internal program/erase timing. |
| VDD | Power Supply | +4.5 V to +5.5 V supply; powers core logic and internal VPP generator for erase/program. |
| VSS | Ground | Reference ground for all I/O and core circuitry; must be low-impedance for noise immunity. |
| NC | No Connection | Pins 12, 24, and 31 are unconnected - must remain floating per datasheet; not tied to VDD/VSS. |
Key Features
| Feature | Design Value |
|---|---|
| SuperFlash Technology | Split-gate cell with thick-oxide tunneling injector delivers stable 55 ns read and 14 µs byte-program times across full lifecycle - no performance degradation after 100k cycles. |
| Hardware + Software Data Protection | Glitch-resistant WE#/CE# pulse rejection (<5 ns), VDD power-up/down detection (<2.5 V inhibit), and mandatory 3-byte (program) / 6-byte (erase) JEDEC-compliant command sequences prevent accidental writes. |
| Fixed Erase/Program Timing | Sector-erase completes in 18 ms (typ), chip-erase in 70 ms (typ), byte-program in 14 µs (typ) - enables deterministic firmware update scheduling without runtime calibration. |
| TTL-Compatible I/O | Meets JEDEC Std 7A for input thresholds (VIL = 0.8 V, VIH = 2.0 V) and output drive (VOL = 0.4 V @ 2.1 mA, VOH = 2.4 V @ –400 µA) - interoperable with legacy 5 V logic families. |
| RoHS-Compliant Packaging | 32-lead PLCC meets EU Directive 2011/65/EU; lead-free terminations and halogen-free molding compound suitable for industrial environmental compliance. |
Applications
| Firmware Storage in PLCs | Bootloader Memory in Industrial HMI |
|---|---|
Use Scenario: Stores firmware image and parameter tables in programmable logic controllers subject to periodic field updates via serial port or USB. IC Role / Device Role / Timing Role: Nonvolatile code storage with sector-erase capability isolates bootloader (protected sector) from application (updatable sector). Use Value: 4 KByte uniform sectors enable atomic firmware patching without erasing entire device; 100k endurance supports >10 years of quarterly updates. |
Use Scenario: Holds boot code and GUI assets in human-machine interface terminals operating in factory-floor environments with wide temperature swings. IC Role / Device Role / Timing Role: Primary boot memory mapped to CPU address space; accessed during cold start before RAM initialization. Use Value: 55 ns read access eliminates wait states on 12 MHz 8051 bus; >100-year data retention ensures reliable startup after 15+ years of shelf storage. |
| Configuration Memory in Telecom Line Cards | Firmware Repository in Energy Metering Modules |
Use Scenario: Stores line-specific calibration coefficients, protocol stacks, and security keys in carrier-grade DSLAM line cards. IC Role / Device Role / Timing Role: Secure configuration store with hardware write-inhibit during power transitions and software command locking. Use Value: Dual protection (VDD monitoring + 6-byte erase sequence) prevents corruption during brownout events common in telecom central offices. |
Use Scenario: Retains metrology firmware, tariff tables, and tamper logs in ANSI C12.22-compliant smart electricity meters deployed in outdoor enclosures. IC Role / Device Role / Timing Role: Long-life nonvolatile memory rated for –40°C to +85°C industrial temp range with guaranteed 100-year data retention. Use Value: RoHS-compliant PLCC package withstands thermal cycling in sealed meter housings; 30 µA standby current extends battery backup life. |
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 |
|---|---|---|---|
| MX29LV200CTTI-70G | 3.0 V core (with 5 V I/O), 70 ns access, 2 Mbit density, 100k endurance, same PLCC-32 package. | Requires dual-supply design; lacks internal VPP generation - needs external 12 V for programming. | Select when migrating to lower-voltage systems; verify board-level VPP routing and voltage translation. |
| AM29LV200BT-70ED | 3.0 V core, 70 ns access, 2 Mbit, 100k endurance, PLCC-32; uses AMD command set (not JEDEC). | Command set incompatibility requires firmware rewrite; no native Data# Polling support - relies on Ready/Busy pin. | Choose only if existing AMD-based toolchain and drivers are already deployed; avoid for new designs. |
Compared with MX29LV200CTTI-70G and AM29LV200BT-70ED, the SST39SF020A-45-4C-WHE offers single 5 V supply operation with integrated VPP generation and JEDEC-standard command compatibility - reducing BOM count and simplifying firmware development for legacy 5 V embedded platforms.
Availability
SST39SF020A-45-4C-WHE is available at Aetrix Electronics and suitable for industrial control systems, energy metering modules, and telecom infrastructure equipment requiring stable component supply with long-lifecycle support and RoHS compliance.
Supply support for SST39SF020A-45-4C-WHE 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 U.S.-based semiconductor manufacturer specializing in microcontrollers, analog devices, and nonvolatile memory solutions, with global design centers and ISO 9001-certified manufacturing.
The SST39SF020A-45-4C-WHE belongs to Microchip's SST39SFx family of Multi-Purpose Flash devices, engineered specifically for cost-sensitive, high-reliability embedded applications needing field-upgradable firmware storage without complex voltage management.
FAQ
What is the maximum operating temperature range for the SST39SF020A-45-4C-WHE?
The SST39SF020A-45-4C-WHE is rated for industrial temperature operation from –40°C to +85°C, as specified in Table 5 of the official datasheet. This range ensures reliable functionality in harsh environments such as factory automation panels and outdoor utility metering enclosures where ambient temperatures exceed commercial limits. The SST39SF020A-45-4C-WHE maintains full DC and AC specifications across this range without derating.
Does the SST39SF020A-45-4C-WHE require an external VPP voltage for programming?
No, the SST39SF020A-45-4C-WHE integrates an internal charge pump that generates the high voltage needed for erase and program operations using only the 4.5–5.5 V VDD supply. This eliminates the need for external VPP circuitry, simplifying PCB layout and reducing component count. The SST39SF020A-45-4C-WHE achieves this through SST's SuperFlash technology with thick-oxide tunneling injector.
How does the SST39SF020A-45-4C-WHE handle write protection during power-up?
The SST39SF020A-45-4C-WHE implements hardware write-inhibit during power transitions: it blocks all write operations when VDD falls below 2.5 V, and rejects sub-5 ns noise pulses on WE# or CE#. This prevents spurious writes during brownout or power-rail instability. The SST39SF020A-45-4C-WHE also requires valid JEDEC-compliant command sequences (3-byte for program, 6-byte for erase), adding software-layer protection.
Can the SST39SF020A-45-4C-WHE be used as a drop-in replacement for the SST39SF020A-45-4C-NHE?
No - the SST39SF020A-45-4C-WHE and SST39SF020A-45-4C-NHE differ in packaging: WHE denotes a 32-lead PLCC with matte tin finish, while NHE specifies a 32-pin PDIP. Pinouts are incompatible between PLCC and PDIP packages, and socket footprints are mechanically distinct. The SST39SF020A-45-4C-WHE cannot be substituted without PCB redesign and footprint change.
What is the sector erase time specification for the SST39SF020A-45-4C-WHE?
The SST39SF020A-45-4C-WHE has a typical sector-erase time of 18 ms, as confirmed in the "Features" section and Table 12 of the datasheet. This applies to any of its uniform 4 KByte sectors and remains constant across the full 100,000-cycle endurance lifetime due to SuperFlash technology. The SST39SF020A-45-4C-WHE supports both WE#- and CE#-controlled sector-erase with identical timing.
SST39SF020A-45-4C-WHE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- SST39 MPF™
- Package/Case:
- 32-TFSOP (0.488", 12.40mm Width)
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- FLASH
- Technology:
- FLASH
- Memory Size:
- 2Mbit
- Memory Organization:
- 256K x 8
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 20µs
- Access Time:
- 45 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
SST39SF020A-45-4C-WHE FAQ
1.How can I place an order for SST39SF020A-45-4C-WHE through Aetrix?
Please submit a Request for Quotation (RFQ) for SST39SF020A-45-4C-WHE 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 SST39SF020A-45-4C-WHE reliable?
The price and inventory of SST39SF020A-45-4C-WHE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SST39SF020A-45-4C-WHE is usually 5 days.
3.What payment methods are accepted for SST39SF020A-45-4C-WHE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST39SF020A-45-4C-WHE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST39SF020A-45-4C-WHE?
SST39SF020A-45-4C-WHE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST39SF020A-45-4C-WHE 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 SST39SF020A-45-4C-WHE?
For technical support, including SST39SF020A-45-4C-WHE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SST39SF020A-45-4C-WHE requirements.
6.How does Aetrix verify that SST39SF020A-45-4C-WHE is sourced from the original manufacturer or authorized distributors?
All SST39SF020A-45-4C-WHE 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 SST39SF020A-45-4C-WHE meets industry standards.
7.What is the process for return or replacement of SST39SF020A-45-4C-WHE?
All SST39SF020A-45-4C-WHE units undergo pre-shipment inspection (PSI). If there is an issue with SST39SF020A-45-4C-WHE, 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 SST39SF020A-45-4C-WHE part is unused and in its original packaging.
Return procedure for SST39SF020A-45-4C-WHE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SST39SF020A-45-4C-WHE Tags
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