My Inquiry
My Account
Microchip Technology SST39SF020A-55-4C-NHE-T
- Part No.:
- SST39SF020A-55-4C-NHE-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
SST39SF020A-55-4C-NHE-T.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:4,139
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SST39SF020A-55-4C-NHE-T from Microchip Technology is a 2-Mbit (256K × 8) CMOS Multi-Purpose Flash memory IC with 55 ns read access time, single 4.5V–5.5V supply operation, and uniform 4-Kbyte sector erase architecture. It delivers 100,000 program/erase cycles endurance and >100 years data retention, serving as nonvolatile code/data storage in embedded microcontroller systems requiring field-upgradable firmware.
For engineers reviewing the SST39SF020A-55-4C-NHE-T datasheet, SST39SF020A-55-4C-NHE-T pinout, SST39SF020A-55-4C-NHE-T application, or SST39SF020A-55-4C-NHE-T equivalent, this page provides verified functional identity, JEDEC-standard x8 parallel interface timing, SuperFlash® reliability metrics, and validated alternative options for industrial control, telecom baseband, and legacy BIOS storage designs.
Technical Context
This device implements Microchip's proprietary SuperFlash® technology with split-gate cell design and thick-oxide tunneling injector, enabling fixed erase/program times independent of cycle count-unlike conventional flash where timing degrades with wear. It supports standard microprocessor bus interfacing via CE#, OE#, and WE# control lines with TTL-compatible I/Os and JEDEC-standard command sets.
Operation relies on software data protection (SDP): byte programming requires a three-byte unlock sequence (5555H/AAH → 2AAAH/55H → 5555H/A0H), while sector or chip erase uses six-byte sequences. End-of-write detection is implemented via Data# Polling (DQ7) and Toggle Bit (DQ6), both valid after defined WE#/CE# edge counts per operation type.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Mbit (256K × 8), directly maps to 256 KB of byte-addressable nonvolatile storage |
| Read Access Time | 55 ns maximum - enables direct execution from flash at up to ~14 MHz system clock without wait states |
| Supply Voltage | 4.5V–5.5V single supply - compatible with legacy 5V logic families and eliminates need for auxiliary voltage rails |
| Endurance | 10,000 minimum cycles (JEDEC A117 qualified), 100,000 typical - supports frequent firmware updates in field-deployed equipment |
| Data Retention | 100 years minimum (JEDEC A103 qualified) - ensures long-term reliability in unpowered storage applications |
| Sector Size | Uniform 4-Kbyte sectors - simplifies partitioning for bootloader, application, and configuration segments with deterministic erase granularity |
| Byte Program Time | 14 µs typical - enables rapid patching of individual code/data bytes without full-sector overhead |
| Chip Erase Time | 70 ms typical - allows complete reinitialization of firmware image in under 100 ms for recovery or provisioning workflows |
Pinout & Package
32-lead TSOP (Thin Small Outline Package) with standard JEDEC x8 parallel Flash pinout; pin 1 is NC, pin 30 is A17 for SST39SF020A (per DS20005022F, Figure 2-1 and Table 2-1).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A16 | Address Inputs | 17-bit address bus supporting 256K × 8 addressing; A16 is MSB for SST39SF020A |
| DQ0–DQ7 | Data Input/Output | 8-bit bidirectional data bus with latched inputs and tri-state outputs controlled by CE#/OE# |
| CE# | Chip Enable | Active-low chip select; device enters standby (30 µA) when high |
| OE# | Output Enable | Active-low output gate; controls data bus tristate during reads |
| WE# | Write Enable | Active-low write control; initiates byte program, sector erase, or chip erase on rising edge |
| VDD | Power Supply | 4.5V–5.5V main supply; powers all internal logic and charge pumps |
| VSS | Ground | Reference ground for all signals and internal circuitry |
| NC | No Connection | Pins 1 and 30 are unconnected for SST39SF020A (pin 1 NC, pin 30 = A17) |
Key Features
| Feature | Design Value |
|---|---|
| SuperFlash® Technology | Fixed 55 ns read and 14 µs byte program times across full lifecycle - eliminates software derating for timing margins |
| Hardware + Software Data Protection | Glitch immunity (<5 ns pulses rejected), VDD power-up/down detection, and JEDEC-compliant 3-/6-byte unlock sequences prevent accidental writes |
| Uniform Sector Architecture | 64 × 4-Kbyte sectors enable granular firmware updates without erasing unrelated code or configuration data |
| End-of-Write Detection | DQ7 Data# Polling and DQ6 Toggle Bit provide real-time status without external timers or polling delays |
| TTL I/O Compatibility | Direct interface with 5V microcontrollers and FPGAs - no level-shifting required for legacy system integration |
| RoHS Compliance | Lead-free TSOP package meets environmental regulations for industrial and telecom deployments |
Applications
| Industrial PLC Firmware Storage | Telecom Baseband Configuration |
|---|---|
Use Scenario: Storing programmable logic controller firmware that requires field updates via serial port or USB host. IC Role / Device Role / Timing Role: Nonvolatile code storage with 55 ns read access enabling zero-wait-state execution from flash. Use Value: 100,000-cycle endurance supports quarterly firmware patches over 10+ year product life without replacement. |
Use Scenario: Holding calibration tables and protocol stack parameters in DSL/Cable modem baseband processors. IC Role / Device Role / Timing Role: Parameter storage with sector-erase granularity allowing independent update of RF calibration vs. MAC layer settings. Use Value: Uniform 4-Kbyte sectors simplify BOM management and reduce risk of corruption during partial rewrites. |
| Legacy PC BIOS Backup | Embedded Medical Device Bootloader |
Use Scenario: Secondary BIOS image storage for fail-safe recovery in industrial motherboards with dual-flash architecture. IC Role / Device Role / Timing Role: Redundant firmware repository accessed only during boot failure or update rollback. Use Value: 100-year data retention ensures backup image integrity across equipment shelf life without refresh cycles. |
Use Scenario: Secure bootloader storage in FDA-cleared diagnostic instruments requiring traceable firmware revision control. IC Role / Device Role / Timing Role: Trusted boot root-of-trust component storing signed verification keys and initial boot code. Use Value: Hardware write-inhibit modes (OE# high, CE# high, WE# high) prevent runtime tampering during critical diagnostics. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar parallel Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT29LV020-15JI | 150 ns read access, 3.0V–3.6V supply only, no 5V compatibility | Requires level-shifting in 5V systems; unsuitable for direct drop-in replacement | Select only if migrating to 3.3V-only design with relaxed timing requirements |
| MX29LV200CTTI-70G | 70 ns read access, 2.7V–3.6V supply, different command set (AMD-style vs. JEDEC) | Needs firmware driver modification; incompatible SDP unlock sequence | Choose for cost-sensitive 3.3V designs where 15 ns slower access is acceptable |
Compared with AT29LV020-15JI and MX29LV200CTTI-70G, the SST39SF020A-55-4C-NHE-T uniquely supports 5V operation with 55 ns timing and JEDEC-standard commands-making it the only option for legacy 5V microcontroller systems requiring minimal hardware or software changes.
Availability
SST39SF020A-55-4C-NHE-T is available at Aetrix Electronics and suitable for industrial PLC firmware storage, telecom baseband configuration, and legacy PC BIOS backup requiring stable component supply across extended production lifecycles.
Supply support for SST39SF020A-55-4C-NHE-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 Inc. is a global semiconductor company specializing in microcontrollers, analog devices, and nonvolatile memory solutions for industrial, automotive, and communications markets.
The SST39SF020A-55-4C-NHE-T belongs to Microchip's Multi-Purpose Flash (MPF) product line, designed specifically for cost-effective, field-upgradable code and configuration storage in 5V embedded systems with stringent reliability and longevity requirements.
FAQ
What is the exact memory organization of the SST39SF020A-55-4C-NHE-T?
The SST39SF020A-55-4C-NHE-T is organized as 256K × 8, providing 2,097,152 bits (2 Mbit) of addressable storage across 256,000 bytes. This matches the SST39SF020A family designation and is confirmed in the device's block diagram and pin description table (DS20005022F, pages 2 and 4). The SST39SF020A-55-4C-NHE-T uses A0–A16 address lines, with A16 as the most significant bit.
Does the SST39SF020A-55-4C-NHE-T support 3.3V operation?
No, the SST39SF020A-55-4C-NHE-T operates exclusively within 4.5V–5.5V. Its DC characteristics table (DS20005022F, Table 6-1) specifies VDD limits and confirms TTL-level input thresholds (VIL ≤ 0.8V, VIH ≥ 2.0V) optimized for 5V logic. Attempting 3.3V operation will result in undefined behavior, failed programming, or data corruption.
How many sectors does the SST39SF020A-55-4C-NHE-T have, and what is their size?
The SST39SF020A-55-4C-NHE-T contains 64 uniform 4-Kbyte sectors, totaling 256 Kbytes. This is explicitly stated in the "Sector Erase Capability" feature list and confirmed in Section 3.3 (DS20005022F, page 5). Each sector is individually erasable using the 30H command, enabling targeted firmware updates without affecting adjacent code or data.
What command sequences are required to program a byte in the SST39SF020A-55-4C-NHE-T?
Byte programming requires a three-step JEDEC-compliant software data protection sequence: (1) write AAH to address 5555H, (2) write 55H to address 2AAAH, (3) write A0H to address 5555H, followed by the target address and data byte. This is documented in Table 4-2 and Figure 7-12 of DS20005022F. The SST39SF020A-55-4C-NHE-T ignores all other write attempts without this unlock.
Is the SST39SF020A-55-4C-NHE-T RoHS compliant and lead-free?
Yes, the SST39SF020A-55-4C-NHE-T is RoHS compliant and lead-free, as explicitly stated in the "Features" section of DS20005022F (page 1). The "-NHE" suffix in the part number denotes a near-zero halogen, lead-free TSOP package per Microchip's packaging nomenclature (DS20005022F, page 21).
SST39SF020A-55-4C-NHE-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- SST39 MPF™
- Package/Case:
- 32-LCC (J-Lead)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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:
- 55 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-PLCC (11.43x13.97)
SST39SF020A-55-4C-NHE-T FAQ
1.How can I place an order for SST39SF020A-55-4C-NHE-T through Aetrix?
Please submit a Request for Quotation (RFQ) for SST39SF020A-55-4C-NHE-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 SST39SF020A-55-4C-NHE-T reliable?
The price and inventory of SST39SF020A-55-4C-NHE-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SST39SF020A-55-4C-NHE-T is usually 5 days.
3.What payment methods are accepted for SST39SF020A-55-4C-NHE-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST39SF020A-55-4C-NHE-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST39SF020A-55-4C-NHE-T?
SST39SF020A-55-4C-NHE-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST39SF020A-55-4C-NHE-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 SST39SF020A-55-4C-NHE-T?
For technical support, including SST39SF020A-55-4C-NHE-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SST39SF020A-55-4C-NHE-T requirements.
6.How does Aetrix verify that SST39SF020A-55-4C-NHE-T is sourced from the original manufacturer or authorized distributors?
All SST39SF020A-55-4C-NHE-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 SST39SF020A-55-4C-NHE-T meets industry standards.
7.What is the process for return or replacement of SST39SF020A-55-4C-NHE-T?
All SST39SF020A-55-4C-NHE-T units undergo pre-shipment inspection (PSI). If there is an issue with SST39SF020A-55-4C-NHE-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 SST39SF020A-55-4C-NHE-T part is unused and in its original packaging.
Return procedure for SST39SF020A-55-4C-NHE-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SST39SF020A-55-4C-NHE-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…
