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Microchip Technology SST38VF6402-90-5I-EKE
- Part No.:
- SST38VF6402-90-5I-EKE
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 48-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
SST38VF6402-90-5I-EKE.pdf
- Description:
- IC FLASH 64MBIT PARALLEL 48TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:206
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Product details
Overview
SST38VF6402-90-5I-EKE from Microchip Technology is a 64 Mbit (4M × 16) CMOS Advanced Multi-Purpose Flash Plus memory IC, designed for nonvolatile program, configuration, and data storage in embedded systems. It operates from a single 2.7–3.6 V supply, delivers 90 ns read access time, supports 100,000 program/erase cycles, and retains data for >100 years. It is commonly used in industrial controllers and network boot firmware storage.
For engineers reviewing the SST38VF6402-90-5I-EKE datasheet, SST38VF6402-90-5I-EKE pinout, SST38VF6402-90-5I-EKE application, or SST38VF6402-90-5I-EKE equivalent, key selection considerations include boot-block protection architecture (B127), 48-lead TSOP package compatibility, JEDEC x16 pinout compliance, and support for Page Read (25 ns), Write-Buffer Programming (1.75 µs/word), and Erase-Suspend/Resume.
Technical Context
The SST38VF6402-90-5I-EKE implements SuperFlash split-gate cell technology with thick-oxide tunneling injector, enabling fixed erase/program times independent of cycle count. Its command-set architecture uses standard microprocessor write sequences with CE#/WE# latching and supports CFI-compliant identification.
It features dual protection schemes: hardware-based via WP# pin for top-boot block (B127) protection and software-controlled individual 32 KWord block locking. The device integrates a 4-word Page Read buffer and 16-word Write Buffer, with status reporting via RY/BY#, DQ6 toggle bit, and DQ7 Data# Polling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 64 Mbit (4M × 16 organization), providing 8 MB of addressable nonvolatile storage |
| Read Access Time | 90 ns (max), enabling direct interface with legacy 10 MHz bus systems without wait states |
| Page Read Time | 25 ns per word (4-word page), reducing sequential read latency by 72% vs. standard read mode |
| Write-Buffer Speed | 1.75 µs per word (16-word buffer), cutting bulk programming time by ~85% vs. single-word writes |
| Endurance & Retention | ≥100,000 program/erase cycles and >100 years data retention at 25°C, validated for long-life industrial deployment |
| Supply Voltage | 2.7–3.6 V single supply, compatible with 3.3 V system rails and eliminating need for auxiliary voltage regulators |
| Protection Scheme | Hardware boot-block lock (B127) via WP# pin + software-configurable 32 KWord block protection, preventing accidental firmware overwrite |
Pinout & Package
Package: 48-lead TSOP (Thin Small Outline Package), RoHS-compliant, surface-mount, standard JEDEC MO-142AC footprint (12.0 × 20.0 mm).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A21 | Address Inputs | 22-bit address bus supporting full 4M-word addressing; A21–A15 select block, A21–A12 select sector |
| DQ0–DQ15 | Data I/O | 16-bit bidirectional data bus with internal latching during writes; tri-stated when CE# or OE# high |
| CE# | Chip Enable | Active-low chip select; device enters standby (<3 µA) when high, enabling multi-device bus sharing |
| OE# | Output Enable | Active-low output gate; controls data bus drive without affecting internal state or power mode |
| WE# | Write Enable | Active-low control for write latching; falling edge latches address, rising edge latches data per JEDEC timing |
| WP# | Write Protect | Active-low hardware lock for boot block B127; prevents erase/program when grounded, independent of software state |
| RST# | Reset | Active-low hardware reset; forces device into Read mode, clearing any pending operations or abort states |
| RY/BY# | Ready/Busy | Open-drain status indicator; low during active program/erase, enabling interrupt-driven host coordination |
| VDD | Power Supply | 2.7–3.6 V core supply; internally regulated for stable operation across voltage range |
| VSS | Ground | Reference return path for all signals and power; two dedicated pins ensure low-impedance grounding |
| NC | No Connection | Pin 26 (TSOP) is unconnected; must be left floating or tied to ground per layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| Boot Block Architecture | B127 (top 32 KWord block) is hardware-protected via WP# pin - critical for secure bootloader storage |
| Erase-Suspend/Resume | Allows real-time read/program of unprotected blocks during active erase, enabling responsive firmware updates |
| Auto Low Power Mode | Reduces active read current from 4 mA to 3 µA after valid access - cuts dynamic power by 99.9% during idle bursts |
| 128-bit Unique ID | Factory-programmed serial number enables device-level traceability and secure firmware binding |
| CFI Compliance | Supports Common Flash Interface commands for automatic parameter detection and cross-vendor tool compatibility |
| JEDEC x16 Pinout | Pin-compatible with industry-standard parallel NOR flash devices, simplifying drop-in replacement in existing designs |
Applications
| Industrial PLC Firmware Storage | Network Router Boot Memory |
|---|---|
Use Scenario: Storing field-upgradable firmware and configuration tables in programmable logic controllers operating in harsh temperature environments (-40°C to +85°C). IC Role / Device Role / Timing Role: Nonvolatile boot memory holding bootloader, RTOS kernel, and I/O mapping tables; accessed during cold start and runtime reconfiguration. Use Value: Hardware WP# lock on B127 prevents corruption during brown-out or ESD events; 100-year retention ensures firmware integrity over equipment lifetime. |
Use Scenario: Hosting boot code and fail-safe recovery images in enterprise-grade Ethernet switches requiring zero-downtime firmware patching. IC Role / Device Role / Timing Role: Primary parallel NOR flash executing in-place (XIP) during boot; supports fast Page Read for rapid image loading and Write-Buffer for background update. Use Value: 25 ns Page Read accelerates boot sequence by >40%; Erase-Suspend allows live traffic forwarding while updating secondary firmware partition. |
| Medical Device Configuration Storage | Automotive Infotainment System BIOS |
Use Scenario: Retaining calibrated sensor offsets, user preferences, and audit logs in Class IIa medical diagnostic instruments subject to IEC 62304 lifecycle requirements. IC Role / Device Role / Timing Role: Secure, tamper-resistant configuration store with password-protected software locking and 128-bit UID for regulatory traceability. Use Value: >100,000 endurance cycles support daily recalibration logging; irreversible block locking meets FDA data integrity mandates. |
Use Scenario: Storing UEFI-compliant BIOS and secure boot keys in automotive head units requiring AEC-Q100 Grade 3 qualification and anti-rollback protection. IC Role / Device Role / Timing Role: Trusted boot memory with hardware boot-block protection (B127) and CFI-compliant interface for bootloader authentication. Use Value: WP#-enabled top-block lock prevents malicious or erroneous BIOS overwrite; JEDEC pinout ensures compatibility with automotive reference designs. |
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 |
|---|---|---|---|
| SST38VF6401-90-5I-EKE | Identical specs except boot block is B0 (bottom), not B127; no WP# hardware lock on top block | Suitable for systems where bootloader resides in lowest memory region and requires physical write protection | Select only if design requires bottom-boot architecture and WP# protection of B0 |
| MX29LV640ETTI-90G | 64 Mbit x16, 90 ns, but lacks Erase-Suspend, Write-Buffer, and 128-bit UID; uses different command set | Lower-cost option for static firmware storage without runtime update requirements | Choose when advanced features like suspend/resume or fast buffering are unnecessary |
Compared with SST38VF6401-90-5I-EKE and MX29LV640ETTI-90G, the SST38VF6402-90-5I-EKE uniquely combines top-boot hardware protection (B127 + WP#), Erase-Suspend capability, and 1.75 µs/word Write-Buffer - making it optimal for safety-critical, field-upgradable embedded systems requiring both security and agility.
Availability
SST38VF6402-90-5I-EKE is available at Aetrix Electronics and suitable for industrial PLCs, network infrastructure equipment, and medical diagnostics devices requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for SST38VF6402-90-5I-EKE 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 components, and memory solutions, with emphasis on reliability, longevity, and embedded system integration.
The SST38VF6402 belongs to Microchip's Advanced Multi-Purpose Flash Plus (MPF+) product line, engineered for high-reliability, low-power, field-upgradable firmware and configuration storage in industrial, networking, and medical applications.
FAQ
What is the boot block location and protection mechanism for SST38VF6402-90-5I-EKE?
The SST38VF6402-90-5I-EKE features a top-boot architecture where Block B127 (addresses 0x7F8000–0x7FFFFF) serves as the hardware-protected boot block. Protection is enforced via the WP# pin: when grounded, it permanently disables erase and program operations on B127 - independent of software commands or lock bits. This ensures bootloader integrity even during power faults or firmware bugs. SST38VF6402-90-5I-EKE also supports software-controlled locking of other 32 KWord blocks using command sequences.
Does SST38VF6402-90-5I-EKE support Page Read, and what is its performance benefit?
Yes, SST38VF6402-90-5I-EKE supports Page Read with a 4-word buffer and 25 ns access time per word - significantly faster than its 90 ns standard read. This mode reduces sequential read latency by up to 72% when accessing aligned 4-word pages, accelerating firmware image loading and configuration table parsing. Address bits A21–A2 select the page; A1/A0 toggle to access individual words within the page. SST38VF6402-90-5I-EKE maintains full JEDEC x16 compatibility during Page Read operations.
How does the Write-Buffer Programming feature improve efficiency in SST38VF6402-90-5I-EKE?
SST38VF6402-90-5I-EKE's Write-Buffer Programming enables up to 16 words to be loaded into an internal buffer and programmed to flash in a single operation, achieving 1.75 µs per word - ~4× faster than standard 7 µs word-program time. This reduces bulk firmware update time, minimizes host CPU overhead, and lowers total energy consumption per write. The buffer is block-scoped: all words must reside in the same 32 KWord block, and the buffer contents are committed via a separate Program Buffer-to-Flash command. SST38VF6402-90-5I-EKE validates buffer integrity with DQ1 abort detection.
What status monitoring methods are available during program/erase operations on SST38VF6402-90-5I-EKE?
SST38VF6402-90-5I-EKE provides three concurrent status monitoring methods: (1) RY/BY# pin (active-low open-drain signal), (2) DQ6 Toggle Bit (toggles during operation, stops when complete), and (3) DQ7 Data# Polling (complements data during write, returns valid data on completion). These can be used independently or together. For Write-Buffer operations, DQ1 indicates abort status. All methods are accessible without halting host execution, enabling efficient polling or interrupt-driven flow control. SST38VF6402-90-5I-EKE specifies valid timing windows for each method relative to WE#/CE# edges.
Is SST38VF6402-90-5I-EKE compatible with standard JEDEC x16 parallel NOR flash interfaces?
Yes, SST38VF6402-90-5I-EKE fully complies with JEDEC Standard JESD21-C for x16 parallel NOR flash pinouts and command sets. Its 48-lead TSOP package uses identical signal assignments (A0–A21, DQ0–DQ15, CE#, OE#, WE#, WP#, RST#, RY/BY#) and timing parameters as industry-standard devices. It also supports CFI (Common Flash Interface) for automatic parameter discovery. This enables direct replacement in existing designs using compatible voltage and timing margins - no PCB or firmware changes required for basic read/write functionality. SST38VF6402-90-5I-EKE extends compatibility with enhanced features like Erase-Suspend and Write-Buffer.
SST38VF6402-90-5I-EKE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- SST38
- Package/Case:
- 48-TFSOP (0.724", 18.40mm Width)
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- FLASH
- Technology:
- FLASH
- Memory Size:
- 64Mbit
- Memory Organization:
- 4M x 16
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 10µs
- Access Time:
- 90 ns
- Voltage - Supply:
- 2.7V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-TSOP
SST38VF6402-90-5I-EKE FAQ
1.How can I place an order for SST38VF6402-90-5I-EKE through Aetrix?
Please submit a Request for Quotation (RFQ) for SST38VF6402-90-5I-EKE 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 SST38VF6402-90-5I-EKE reliable?
The price and inventory of SST38VF6402-90-5I-EKE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SST38VF6402-90-5I-EKE is usually 5 days.
3.What payment methods are accepted for SST38VF6402-90-5I-EKE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST38VF6402-90-5I-EKE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST38VF6402-90-5I-EKE?
SST38VF6402-90-5I-EKE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST38VF6402-90-5I-EKE 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 SST38VF6402-90-5I-EKE?
For technical support, including SST38VF6402-90-5I-EKE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SST38VF6402-90-5I-EKE requirements.
6.How does Aetrix verify that SST38VF6402-90-5I-EKE is sourced from the original manufacturer or authorized distributors?
All SST38VF6402-90-5I-EKE 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 SST38VF6402-90-5I-EKE meets industry standards.
7.What is the process for return or replacement of SST38VF6402-90-5I-EKE?
All SST38VF6402-90-5I-EKE units undergo pre-shipment inspection (PSI). If there is an issue with SST38VF6402-90-5I-EKE, 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 SST38VF6402-90-5I-EKE part is unused and in its original packaging.
Return procedure for SST38VF6402-90-5I-EKE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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