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Microchip Technology SST39VF400A-70-4C-B3KE-T
- Part No.:
- SST39VF400A-70-4C-B3KE-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 48-TFBGA
- Datasheet:
-
SST39VF400A-70-4C-B3KE-T.pdf
- Description:
- IC FLASH 4MBIT PARALLEL 48TFBGA
- Quantity:
- Payment:
- Shipping:
Inventory:2,594
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Product details
Overview
SST39VF400A-70-4C-B3KE-T from Microchip Technology is a 4 Mbit (256K × 16) CMOS Multi-Purpose Flash memory IC with 2.7–3.6 V single-supply operation, 70 ns read access time, JEDEC-standard x16 asynchronous interface, and SuperFlash® split-gate technology enabling 100,000 program/erase cycles and >100 years data retention. It serves as nonvolatile code/data storage in embedded microcontroller systems requiring field-upgradable firmware.
For engineers reviewing the SST39VF400A-70-4C-B3KE-T datasheet, SST39VF400A-70-4C-B3KE-T pinout, SST39VF400A-70-4C-B3KE-T application, or SST39VF400A-70-4C-B3KE-T equivalent, key selection considerations include its 48-pin TSOP package, sector/block-erase architecture (2 KWord sectors / 32 KWord blocks), hardware/software write protection, toggle-bit and data# polling status detection, and compatibility with standard x16 memory bus timing.
Technical Context
The SST39VF400A-70-4C-B3KE-T implements an asynchronous x16 parallel interface with CE#, OE#, and WE# control lines, supporting Word-Program (14 µs typical), Sector-Erase (18 ms), Block-Erase (18 ms), and Chip-Erase (70 ms) operations. Its SuperFlash® cell architecture uses thick-oxide tunneling injection for fixed erase/program times independent of cycle count.
It features JEDEC-standard command sets (including Software Data Protection), CFI Query mode for automatic device identification, and dual status detection (DQ6 toggle bit, DQ7 data# polling) to manage write completion without polling overhead. Address mapping includes A0–A17 (18 address bits), supporting 256K × 16 organization.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 4 Mbit (256K × 16) - supports 512 KB of 16-bit wide nonvolatile storage |
| Read Access Time | 70 ns - enables direct execution from flash (XIP) in systems with ≤14 MHz bus timing |
| Supply Voltage | 2.7–3.6 V - compatible with low-voltage 3.3 V logic and mixed-voltage industrial designs |
| Endurance | 100,000 cycles - sufficient for firmware update cycles over 10+ years in field-deployed equipment |
| Data Retention | >100 years - ensures long-term reliability in unpowered storage applications |
| Erase Granularity | 2 KWord sectors / 32 KWord blocks - allows fine-grained firmware partitioning and partial updates |
| Write Timing | Automatic internal VPP generation - eliminates need for external high-voltage programming supply |
Pinout & Package
Package: 48-lead TSOP (12 mm × 20 mm), RoHS-compliant, lead-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | A0–A16 used for 256K × 16 addressing; A17 selects upper half of 512K address space (per datasheet Fig.2) |
| DQ0–DQ15 | Data I/O | 16-bit bidirectional bus; latched internally during writes; tri-stated when CE# or OE# high |
| CE# | Chip Enable | Active-low chip select; device enters standby (3 µA) when high |
| OE# | Output Enable | Active-low output gate; controls data bus visibility during read cycles only |
| WE# | Write Enable | Active-low control for program/erase command latching and internal timing initiation |
| VDD | Power Supply | 2.7–3.6 V core supply; powers all logic and SuperFlash® cell operations |
| VSS | Ground | Two dedicated ground pins (pins 23 and 46) for noise reduction and current return path separation |
| NC | No Connect | Pins 9, 10, 12–15, 18, 20, 21, 22, 24, 25, 27, 28, 30, 31, 33, 34, 36, 37, 39, 40, 42, 43, 44, 45 - electrically isolated, must be left floating |
Key Features
| Feature | Design Value |
|---|---|
| SuperFlash® Technology | Split-gate cell with thick-oxide injector enables fixed 14 µs program and 18 ms erase times across full lifetime |
| JEDEC x16 Pinout & Command Set | Drop-in replacement for legacy parallel NOR flash; no PCB redesign required for compatible sockets |
| Hardware + Software Write Protection | Glitch immunity (<5 ns), VDD power-up/down detection, and 6-byte SDP command lock prevent accidental erasure |
| Uniform Erase Architecture | 128 sectors (2 KWord each) and 8 blocks (32 KWord each) enable deterministic update partitioning |
| Status Detection (DQ6/DQ7) | Toggle Bit (DQ6) and Data# Polling (DQ7) allow host CPU to poll asynchronously without timer overhead |
Applications
| Industrial PLC Firmware Storage | Medical Device Boot Code |
|---|---|
Use Scenario: Storing programmable logic controller firmware that requires secure, field-upgradable nonvolatile memory with long data retention. IC Role / Device Role / Timing Role: Primary boot code and configuration storage device interfaced directly to ARM Cortex-M or Renesas RX MCU via 16-bit parallel bus. Use Value: 100,000 endurance cycles support 5+ daily firmware updates over 50 years; 70 ns access enables zero-wait-state XIP execution. | Use Scenario: Holding certified boot loader and safety-critical diagnostic routines in Class II medical imaging equipment. IC Role / Device Role / Timing Role: Secure, tamper-resistant nonvolatile memory mapped into MCU address space for cold-start execution. Use Value: Hardware write inhibit during power ramp prevents corruption; >100-year retention meets FDA long-term archival requirements. |
| Automotive Infotainment System | Network Router Configuration |
Use Scenario: Storing UI assets, map data, and OTA update staging area in automotive head units operating across -40°C to +85°C. IC Role / Device Role / Timing Role: Secondary flash memory co-located with main application processor for modular software partitioning. Use Value: Industrial temperature grade (-40°C to +85°C) and 2.7 V minimum VDD ensure reliable operation during cold cranking. | Use Scenario: Maintaining persistent configuration tables, MAC address storage, and failover firmware images in enterprise-grade routers. IC Role / Device Role / Timing Role: Dedicated configuration memory accessed by MIPS or ARM SoC during boot and runtime reconfiguration. Use Value: Sector-erase capability allows atomic update of routing tables without disrupting active packet forwarding. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar parallel NOR flash applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SST39VF400A-70-4I-B3KE-T | Same die and timing, but rated for Industrial (-40°C to +85°C) temperature range vs. Commercial (0°C to +70°C) for B3KE-T | Required for extended-temperature deployments; identical pinout and command set | Select when ambient operating temperature exceeds 70°C or requires automotive/industrial qualification |
| MX29LV400CBTI-70G | 4 Mbit x16, 70 ns, 2.7–3.6 V, but uses different command set (non-JEDEC) and lacks CFI Query mode | Requires firmware driver modification; no automatic geometry detection; lower endurance (100K vs. same) | Consider only if existing design already uses Macronix-compatible drivers and CFI is unused |
Compared with SST39VF400A-70-4C-B3KE-T, the -4I variant adds extended temperature support without layout change, while MX29LV400CBTI-70G demands driver adaptation and forfeits CFI-based auto-configuration-making SST39VF400A-70-4C-B3KE-T preferable for new designs prioritizing interoperability and qualification simplicity.
Availability
SST39VF400A-70-4C-B3KE-T is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device boot code, and automotive infotainment systems requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for SST39VF400A-70-4C-B3KE-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 delivering microcontrollers, analog, FPGA, and memory solutions with emphasis on reliability, longevity, and embedded system integration.
The SST39VF series belongs to Microchip's legacy parallel NOR flash product line, designed specifically for cost-sensitive, high-reliability embedded applications requiring field-upgradable firmware and deterministic erase/program behavior.
FAQ
What is the exact memory organization of the SST39VF400A-70-4C-B3KE-T?
The SST39VF400A-70-4C-B3KE-T is organized as 256K words × 16 bits, totaling 4 Mbit (512 KB) of storage. It uses A0–A17 address lines (18 bits), where A0–A16 select individual 16-bit words and A17 distinguishes between upper and lower halves of the 512K address space, per the device's datasheet Figure 2 and Table 8.
Does the SST39VF400A-70-4C-B3KE-T require an external VPP voltage for programming?
No, the SST39VF400A-70-4C-B3KE-T does not require an external VPP voltage. It integrates internal charge pump circuitry to generate the high voltage needed for programming and erasing, operating solely from the 2.7–3.6 V VDD supply-confirmed in the "Automatic Write Timing" feature and Table 11 DC characteristics.
How many erase sectors and blocks does the SST39VF400A-70-4C-B3KE-T support?
The SST39VF400A-70-4C-B3KE-T supports 128 uniform sectors of 2 KWords each (4 KBytes per sector) and 8 uniform blocks of 32 KWords each (64 KBytes per block), as specified in Table 8 (Device Geometry Information) and confirmed in the "Sector-Erase Capability" and "Block-Erase Capability" features.
Is the SST39VF400A-70-4C-B3KE-T pin-compatible with the SST39LF400A series?
Yes, the SST39VF400A-70-4C-B3KE-T is pin-compatible with the SST39LF400A series in the same package (e.g., 48-pin TSOP), sharing identical pinout, signal definitions, and JEDEC-standard command set-but differs in supply voltage range (2.7–3.6 V vs. 3.0–3.6 V) and read access time (70 ns vs. 55 ns).
What status detection methods does the SST39VF400A-70-4C-B3KE-T provide for write operations?
The SST39VF400A-70-4C-B3KE-T provides two hardware-supported status detection methods: Toggle Bit (DQ6 toggles during internal program/erase and stops when complete) and Data# Polling (DQ7 returns complemented data during operation and true data upon completion), both usable after the fourth (program) or sixth (erase) WE# pulse per datasheet Section "Write Operation Status Detection".
SST39VF400A-70-4C-B3KE-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- SST39 MPF™
- Package/Case:
- 48-TFBGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- FLASH
- Technology:
- FLASH
- Memory Size:
- 4Mbit
- Memory Organization:
- 256K x 16
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 20µs
- Access Time:
- 70 ns
- Voltage - Supply:
- 2.7V ~ 3.6V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-TFBGA (6x8)
SST39VF400A-70-4C-B3KE-T FAQ
1.How can I place an order for SST39VF400A-70-4C-B3KE-T through Aetrix?
Please submit a Request for Quotation (RFQ) for SST39VF400A-70-4C-B3KE-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 SST39VF400A-70-4C-B3KE-T reliable?
The price and inventory of SST39VF400A-70-4C-B3KE-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SST39VF400A-70-4C-B3KE-T is usually 5 days.
3.What payment methods are accepted for SST39VF400A-70-4C-B3KE-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST39VF400A-70-4C-B3KE-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST39VF400A-70-4C-B3KE-T?
SST39VF400A-70-4C-B3KE-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST39VF400A-70-4C-B3KE-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 SST39VF400A-70-4C-B3KE-T?
For technical support, including SST39VF400A-70-4C-B3KE-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SST39VF400A-70-4C-B3KE-T requirements.
6.How does Aetrix verify that SST39VF400A-70-4C-B3KE-T is sourced from the original manufacturer or authorized distributors?
All SST39VF400A-70-4C-B3KE-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 SST39VF400A-70-4C-B3KE-T meets industry standards.
7.What is the process for return or replacement of SST39VF400A-70-4C-B3KE-T?
All SST39VF400A-70-4C-B3KE-T units undergo pre-shipment inspection (PSI). If there is an issue with SST39VF400A-70-4C-B3KE-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 SST39VF400A-70-4C-B3KE-T part is unused and in its original packaging.
Return procedure for SST39VF400A-70-4C-B3KE-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SST39VF400A-70-4C-B3KE-T Tags
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