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Microchip Technology SST39VF400A-70-4I-EKE
- Part No.:
- SST39VF400A-70-4I-EKE
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 48-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
SST39VF400A-70-4I-EKE.pdf
- Description:
- IC FLASH 4MBIT PARALLEL 48TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:764
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Product details
Overview
SST39VF400A-70-4I-EKE 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, and JEDEC-standard x16 asynchronous interface. It features uniform 2 KWord sectors and 32 KWord blocks, 100,000 program/erase cycles endurance, and >100 years data retention - deployed in industrial embedded systems for firmware storage and configuration updates.
For engineers reviewing the SST39VF400A-70-4I-EKE datasheet, SST39VF400A-70-4I-EKE pinout, SST39VF400A-70-4I-EKE application, or SST39VF400A-70-4I-EKE equivalent, key selection criteria include voltage range compatibility (2.7–3.6 V), TSOP-48 package footprint, sector/block erase granularity, SuperFlash® energy efficiency, and hardware/software data protection compliance.
Technical Context
The SST39VF400A-70-4I-EKE implements SST's proprietary SuperFlash® technology with split-gate cell architecture and thick-oxide tunneling injector, enabling fixed erase/program times independent of cycle count. It supports standard JEDEC command sets including Word-Program, Sector-Erase (30H), Block-Erase (50H), Chip-Erase (10H), and Software ID/CFI Query (90H/98H).
Operation relies on latched address/data with CMOS-compatible I/O, active-low CE#/OE#/WE# control, and end-of-write detection via DQ7 Data# Polling and DQ6 Toggle Bit. It requires no external VPP and uses internal charge pump for programming, with hardware noise/glitch protection and VDD power-up/down detection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 4 Mbit (256K × 16 organization) - supports 16-bit parallel bus interfaces without data width conversion logic. |
| Read Access Time | 70 ns - enables direct connection to microcontrollers with ≤14 MHz bus timing without wait states. |
| Supply Voltage | 2.7–3.6 V - compatible with 3.3 V industrial systems and tolerant of brown-out conditions down to 2.7 V. |
| Endurance | 100,000 program/erase cycles - sufficient for field firmware updates over 10+ years in industrial control applications. |
| Data Retention | >100 years - ensures long-term reliability in unpowered storage for boot code and calibration tables. |
| Erase Granularity | Uniform 2 KWord sectors (4 KB) and 32 KWord blocks (64 KB) - allows fine-grained firmware patching and bulk reprogramming. |
| Active Current | 9 mA typical at 14 MHz - reduces system power budget during active read operations in battery-backed modules. |
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 JEDEC mapping for 4 Mbit device. |
| DQ0–DQ15 | Data I/O | 16-bit bidirectional data bus; outputs tri-stated when CE# or OE# high; inputs latched on WE# rising edge. |
| CE# | Chip Enable | Active-low chip select - enables device only when low; high state places device in standby (3 µA). |
| OE# | Output Enable | Active-low output gate - controls data bus drive; required low with CE# for valid read output. |
| WE# | Write Enable | Active-low write control - initiates command latching and internal program/erase sequences on rising edge. |
| VDD | Power Supply | 2.7–3.6 V supply - powers core logic and internal charge pump; no external VPP required. |
| VSS | Ground | Two dedicated ground pins (pins 23 and 47) - reduce noise coupling and improve signal integrity in high-speed reads. |
| NC | No Connect | Pins 9, 10, 12–15, 18, 20, 21, 22, 24, 25, 26, 27, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 40, 41, 42, 43, 44, 45, 46 - electrically isolated; must not be connected. |
Key Features
| Feature | Design Value |
|---|---|
| SuperFlash® Technology | Split-gate cell with thick-oxide injector delivers fixed 14 µs word-program and 18 ms sector/block-erase times across full lifecycle - eliminates software de-rating. |
| Hardware + Software Data Protection | Glitch-resistant WE#/CE# pulse rejection (<5 ns), VDD lockout (<1.5 V), and mandatory 3-byte/6-byte JEDEC command sequences prevent accidental writes during power transitions. |
| Energy-Efficient Programming | Lower current draw and shorter erase time vs. conventional flash - reduces total energy per erase/program by >30%, critical for thermally constrained industrial PCBs. |
| Common Flash Interface (CFI) | Standardized CFI query mode (98H command) provides runtime-readable geometry, timing, and command set metadata - enables generic flash drivers in bootloader firmware. |
| JEDEC x16 Pinout Compliance | Direct drop-in replacement for industry-standard 16-bit parallel NOR flash sockets - no PCB redesign needed when migrating from legacy devices. |
Applications
| Industrial PLC Firmware Storage | Medical Device Configuration Memory |
|---|---|
Use Scenario: Storing programmable logic controller firmware images that require field updates via serial interface and secure validation before execution. IC Role / Device Role / Timing Role: Nonvolatile code storage with fast random read access and sector-locked update capability - serves as primary boot ROM and application image repository. Use Value: 70 ns read latency enables deterministic real-time task startup; 100,000-cycle endurance supports quarterly firmware patches over 10-year product life. | Use Scenario: Holding calibrated sensor offsets, user preferences, and regulatory audit logs in Class II medical instruments operating in -40°C to +85°C environments. IC Role / Device Role / Timing Role: Reliable parameter storage with guaranteed >100-year retention and industrial temperature rating - acts as trusted configuration vault. Use Value: Dual VSS pins and 2.7 V min supply ensure stable operation during brown-outs; hardware write inhibit prevents corruption during power cycling. |
| Automotive Infotainment Bootloader | Networking Equipment Feature Licensing |
Use Scenario: Hosting secure bootloader code that validates signed firmware updates before loading into RAM on automotive head units. IC Role / Device Role / Timing Role: Read-optimized boot memory with block-erase capability - stores immutable first-stage loader and cryptographic keys. Use Value: JEDEC-standard command set enables reuse of certified bootloader stacks; CFI support simplifies qualification across vehicle platforms. | Use Scenario: Storing encrypted feature-enable tokens and license expiration dates in enterprise switches and routers. IC Role / Device Role / Timing Role: Tamper-resistant nonvolatile storage with software data protection - holds licensing metadata separate from main application flash. Use Value: 64 KB block-erase allows atomic license revocation; toggle-bit polling enables efficient status checking without CPU polling overhead. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SST39VF400A-70-4C-EKE | Commercial temperature grade (0°C to +70°C) vs. industrial (-40°C to +85°C); identical electrical specs and pinout. | Not rated for extended temperature operation - unsuitable for under-hood or outdoor telecom equipment. | Select only for cost-sensitive consumer-grade designs where ambient temperature remains within 0–70°C. |
| MX29LV400CTTI-70G | 4 Mbit x16, 70 ns, 3.0–3.6 V supply; lacks SuperFlash® fixed timing - erase times increase with cycle count. | Requires firmware de-rating for long-life applications; no CFI support limits driver portability. | Use when legacy design already uses Macronix pinout and timing margins accommodate variable erase performance. |
Compared with SST39VF400A-70-4I-EKE, the SST39VF400A-70-4C-EKE offers identical functionality at lower cost but sacrifices industrial temperature resilience, while MX29LV400CTTI-70G provides pin compatibility with older designs but lacks lifecycle stability and standardized CFI metadata.
Availability
SST39VF400A-70-4I-EKE is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device configuration memory, and automotive infotainment bootloader applications requiring stable component supply, long-term obsolescence management, and RoHS-compliant manufacturing.
Supply support for SST39VF400A-70-4I-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 devices, and memory solutions, with acquisition of Silicon Storage Technology (SST) in 2010.
The SST39VF400A-70-4I-EKE belongs to the SST39VFxxxA family of Multi-Purpose Flash devices, designed specifically for cost-sensitive, high-reliability embedded systems requiring robust firmware and configuration storage with minimal power and thermal impact.
FAQ
What is the maximum operating temperature range for the SST39VF400A-70-4I-EKE?
The SST39VF400A-70-4I-EKE is rated for industrial temperature operation from -40°C to +85°C. This specification is validated per the device's Absolute Maximum Ratings and Operating Range tables in the DS25001A datasheet. The "I" suffix in SST39VF400A-70-4I-EKE explicitly denotes industrial grade, distinguishing it from the commercial-grade "C" variant. All timing parameters, including 70 ns read access and 14 µs word-program, are guaranteed across this full range.
Does the SST39VF400A-70-4I-EKE require an external VPP voltage for programming?
No, the SST39VF400A-70-4I-EKE does not require an external VPP voltage. It integrates an internal charge pump that generates the necessary high-voltage programming signals from the standard 2.7–3.6 V VDD supply. This eliminates the need for additional power rails or voltage translators, simplifying board design and reducing BOM cost. The datasheet confirms "Internal VPP Generation" as an explicit feature and lists VPP min/max as 0000H in CFI Table 6.
How many address lines are active for the SST39VF400A-70-4I-EKE, and what is the role of A17?
The SST39VF400A-70-4I-EKE uses A0–A16 for standard 256K × 16 addressing (217 = 131,072 words × 2 bytes = 262,144 bytes = 256 KB). A17 functions as the Most Significant Address (AMS) bit for sector/block erase commands, selecting among the 128 uniform sectors defined in its geometry. Per Table 8 and Figure 2, A17 is used during erase address latching but is not required for standard read/write operations.
What are the supported erase modes for the SST39VF400A-70-4I-EKE, and how are they initiated?
The SST39VF400A-70-4I-EKE supports three erase modes: Sector-Erase (2 KWord = 4 KB), Block-Erase (32 KWord = 64 KB), and Chip-Erase (full 4 Mbit array). Each is initiated via a six-byte JEDEC command sequence written to specific addresses (e.g., 5555H/2AAAH), ending with command codes 30H, 50H, or 10H respectively. Erase begins after the sixth WE# pulse, and completion is verified using DQ6 Toggle Bit or DQ7 Data# Polling - no external timers or delays are needed.
Is the SST39VF400A-70-4I-EKE pin-compatible with the SST39LF400A series?
Yes, the SST39VF400A-70-4I-EKE is pin-compatible with the SST39LF400A series in the same package (e.g., TSOP-48), sharing identical pin assignments, signal names, and JEDEC x16 interface layout. However, the SST39LF400A operates at 3.0–3.6 V only and has 55 ns read access, whereas the SST39VF400A-70-4I-EKE supports 2.7–3.6 V and specifies 70 ns. Voltage and timing differences must be validated in the target system before substitution.
SST39VF400A-70-4I-EKE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- SST39 MPF™
- 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:
- 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:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-TSOP
SST39VF400A-70-4I-EKE FAQ
1.How can I place an order for SST39VF400A-70-4I-EKE through Aetrix?
Please submit a Request for Quotation (RFQ) for SST39VF400A-70-4I-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 SST39VF400A-70-4I-EKE reliable?
The price and inventory of SST39VF400A-70-4I-EKE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SST39VF400A-70-4I-EKE is usually 5 days.
3.What payment methods are accepted for SST39VF400A-70-4I-EKE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST39VF400A-70-4I-EKE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST39VF400A-70-4I-EKE?
SST39VF400A-70-4I-EKE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST39VF400A-70-4I-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 SST39VF400A-70-4I-EKE?
For technical support, including SST39VF400A-70-4I-EKE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SST39VF400A-70-4I-EKE requirements.
6.How does Aetrix verify that SST39VF400A-70-4I-EKE is sourced from the original manufacturer or authorized distributors?
All SST39VF400A-70-4I-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 SST39VF400A-70-4I-EKE meets industry standards.
7.What is the process for return or replacement of SST39VF400A-70-4I-EKE?
All SST39VF400A-70-4I-EKE units undergo pre-shipment inspection (PSI). If there is an issue with SST39VF400A-70-4I-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 SST39VF400A-70-4I-EKE part is unused and in its original packaging.
Return procedure for SST39VF400A-70-4I-EKE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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