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STC15W404AS-35I

In Stock 56386 pcs Reference Price(In US Dollars)
1+
$0.4265
Manufacturer Part Number:
STC15W404AS-35I
Manufacturer / Brand
STC
Part of Description:
1141
Datasheets:
Lead Free Status / RoHS Status:
RoHS Compliant
Stock Condition:
New original, 56386 pcs Stock Available.
ECAD Model:
Ship From:
Hong Kong
Shipment Way:
DHL/Fedex/TNT/UPS

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Part Number STC15W404AS-35I
Manufacturer / Brand STC
Stock Quantity 56386 pcs Stock
Category Integrated Circuits (ICs) > Specialized ICs
Description 1141
Lead Free Status / RoHS Status: RoHS Compliant
Condition New Original Stock
Warranty 100% Perfect Functions
Lead Time 2-3days after payment.
Payment Credit Card / PayPal / Telegraphic Transfer (T/T) / Western Union
Shipping by DHL / Fedex / UPS / TNT
Port HongKong
RFQ Email Info@IC-Components.com

Packaging & ESD

Industry-standard static shielding packaging is used for electronic components.Anti-static, light-transparent materials allow easy identification of ICs and PCB assemblies.
The packaging structure provides electrostatic protection based on Faraday cage principles.This helps protect sensitive components from static discharge during handling and transportation.


All products are packed in ESD-safe anti-static packaging. Outer packaging labels include part number, brand, and quantity for clear identification. Goods are inspected prior to shipment to ensure proper condition and authenticity.

ESD protection is maintained throughout packing, handling, and global transportation. Secure packaging provides reliable sealing and resistance during transit. Additional cushioning materials are applied when required to protect sensitive components.

QC(Part Testing by IC Components)Quality Warranty

We can offer worldwide express delivery service, such as DHLor FedEx or TNT or UPS or other forwarder for shipment.

Global Shipment by DHL/FedEx/TNT/UPS

Shipping Fees reference DHL/FedEx
1). You can offer your express delivery account for shipment, ifyou haven’t any express account for shipment, we can offer our account inadvance.
2). Use our account for shipment, Shipment charges(Reference DHL/FedEx, Different Countries has different price.)
Shipment charges: (Reference DHL and FedEX)
Weight(KG): 0.00kg-1.00kg Price(USD$) : USD$60.00
Weight(KG): 1.00kg-2.00kg Price(USD$) : USD$80.00
* The price of cost is reference with DHL/FedEx. The detail charges, please contact us. Different country the express charges are different.



We accept the payment terms: Telegraphic Transfer(T/T), Credit Card, PayPal and Western Union.

PayPal:

PayPal Bank Information:
Company Name : IC COMPONENTS LTD
Paypal ID: PayPal@IC-Components.com

BANK TRANSFAR (Telegraphic Transfer)

Payment For Telegraphic Transfers:
Company Name : IC COMPONENTS LTD Beneficiary Account Number : 549-100669-701
Beneficiary Bank name : Bank of Communications (Hong Kong) Ltd Beneficiary Bank Code : 382 (for local payment)
Beneficiary Bank SWIFT : COMMHKHK
Beneficiary Bank Address : Tsuen Wan Market Street Branch 53 Market Street, Tsuen Wan N.T., Hong Kong

Any inquires or questions, please kindly contact us Email: Info@IC-Components.com


Frequently Asked Questions

Can the STC15W404AS-35I be used in a battery-powered industrial sensor node without external voltage regulators, given its operating voltage range?
The STC15W404AS-35I operates from 2.6V to 5.5V, making it suitable for direct connection to unregulated lithium battery outputs (e.g., 3.7V nominal) without additional regulation, provided transient voltages remain within tolerance during load changes and discharge cycles.
What is the maximum number of GPIO pins that can be simultaneously driven at high level while maintaining stable operation on the STC15W404AS-35I?
Each I/O pin on the STC15W404AS-35I has a typical sink current of 20mA and source current of 15mA. Designers should limit total sourcing/sinking across all pins to ≤100mA to avoid overheating; thus, no more than 6–7 pins should actively drive high simultaneously under continuous load.
Is it possible to interface the STC15W404AS-35I directly with 3.3V logic peripherals when powered by a 5V supply?
Yes, but caution is required. While the MCU’s VDD range includes 3.3V, driving 3.3V inputs with a 5V output may exceed input protection thresholds if not buffered. Use series resistors or level shifters when connecting high-level outputs (>3.3V) to sensitive 3.3V devices.
How does the internal clock configuration affect power consumption in sleep modes for the STC15W404AS-35I?
In deep sleep mode, disabling the crystal oscillator and using the internal RC clock reduces current to ~1µA. However, wake-up time increases due to slower RC startup; designers must balance latency requirements against power savings when selecting clock sources.
Can the STC15W404AS-35I replace the older STC15W408AS in an existing PCB layout without modification?
No, because the STC15W404AS-35I has half the flash memory (4KB vs. 8KB), which may cause program size overflow. Additionally, package compatibility depends on pinout—verify mechanical footprint alignment before assuming drop-in replacement.
What precautions are necessary when reprogramming the STC15W404AS-35I via UART during production testing?
Ensure clean power decoupling (100nF ceramic near VDD), use a stable 5V/3.3V supply matching target voltage, and maintain RST# low during ISP. Floating RX lines may cause false resets; tie unused TX pins to ground or configure them as inputs with pull-ups.
Does the STC15W404AS-35I support brown-out detection (BOD) for robust operation in variable-voltage environments?
Yes, the device includes configurable brown-out reset circuitry. It monitors VDD and triggers a system reset if voltage drops below a programmable threshold (typically 2.4V–4.2V). Configure BOD via software to prevent erratic behavior during power transients.
Can the STC15W404AS-35I be safely used in automotive-grade temperature applications (-40°C to +125°C)?
The commercial-grade version (I suffix) supports -20°C to +70°C only. For extended temperature ranges, verify availability of automotive variants or consult STC for qualified part numbers. Operating beyond rated specs risks data corruption and reduced reliability.
What is the impact of enabling watchdog timer (WDT) on long-term stability in embedded control loops with the STC15W404AS-35I?
Enabling WDT improves fault recovery but requires periodic service calls in firmware. Failure to clear it causes reset cycles that disrupt control algorithms. Implement robust task scheduling with redundant WDT feed points to avoid unintended resets in mission-critical systems.
Are there known issues when cascading multiple STC15W404AS-35I devices via SPI for distributed sensing networks?
Cascading is feasible but introduces timing skew and signal integrity challenges. Limit bus length (<10cm), use pull-up resistors on MOSI/MISO, and ensure clock polarity matches all slaves. Avoid daisy-chaining more than three devices unless buffered or isolated with line drivers.

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