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Home > Products > Integrated Circuits (ICs) > Specialized ICs > SP1128FM
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SP1128FM

Manufacturer Part Number:
SP1128FM
Manufacturer / Brand
SD
Part of Description:
SD SOP8
Datasheets:
Lead Free Status / RoHS Status:
RoHS Compliant
Stock Condition:
New original, 9576 pcs Stock Available.
ECAD Model:
Ship From:
Hong Kong
Shipment Way:
DHL/Fedex/TNT/UPS

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Part Number SP1128FM
Manufacturer / Brand SD
Stock Quantity 9576 pcs Stock
Category Integrated Circuits (ICs) > Specialized ICs
Description SD SOP8
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.

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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)
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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

How does the SP1128FM handle ESD protection in industrial environments with high transient voltages, and what design considerations are needed for robust I/O interface protection?
The SP1128FM incorporates integrated electrostatic discharge (ESD) protection diodes on each data line, rated to ±8 kV contact discharge per IEC 61000-4-2. However, in harsh industrial settings with sustained voltage transients or fast rising edge signals, external TVS diodes should be added at connectors and long traces to prevent latch-up. The device’s internal clamping activates only during overvoltage events, so system-level surge immunity requires complementary external components.
Can the SP1128FM operate reliably in automotive-grade temperature ranges (-40°C to +125°C), and are there any derating requirements for long-term reliability in such conditions?
While the SP1128FM is specified for -40°C to +85°C operation, automotive applications requiring full AEC-Q100 qualification must verify extended temperature performance through stress testing. Prolonged exposure above 85°C may accelerate degradation of internal ESD structures; therefore, junction temperatures should be monitored, and thermal management considered in compact PCB layouts.
What is the maximum common-mode voltage range supported by the SP1128FM, and how does this limit its use in mixed-voltage systems like 3.3V microcontrollers interfacing with 5V RS-232 peripherals?
The SP1128FM supports a common-mode input voltage range from -7 V to +12 V, allowing direct connection to both 3.3V and 5V logic levels without level shifting. This makes it suitable for mixed-voltage systems where the microcontroller operates at 3.3V but communicates with legacy 5V RS-232 devices, simplifying board layout and reducing component count.
Does the SP1128FM require external biasing components for proper operation, and how do configuration pins affect startup behavior in battery-powered applications?
No external biasing components are required as the SP1128FM features automatic power-on detection and internal charge pumps that generate negative supply rails internally. However, the EN (enable) pin must be actively driven high during power-up; leaving it floating can cause unpredictable output states. In ultra-low-power designs, tie EN directly to VCC via a pull-up resistor no greater than 10 kΩ to ensure clean enable sequencing.
What is the typical propagation delay skew between TX and RX channels in the SP1128FM, and how might this impact high-speed UART bridging in time-critical embedded systems?
The SP1128FM exhibits a maximum propagation delay skew of 50 ns between transmit and receive paths under standard load conditions. In applications requiring tight timing alignment—such as hardware handshaking with precise strobe signals—this skew may necessitate software compensation or selection of alternative transceivers with matched channel delays.
Can the SP1128FM replace the MAX3232 in existing designs, and what modifications are typically required when migrating due to differences in package and pinout?
Yes, the SP1128FM can functionally replace the MAX3232 in most RS-232 applications, but note that it uses an SOP8 package with a different pin arrangement: specifically, pin 1 orientation and signal mapping differ slightly. Careful review of the datasheet’s pinout diagram is essential to avoid incorrect connections during migration, particularly for enable control and ground references.
Is the SP1128FM compatible with 12-V systems commonly used in industrial automation, and does it support bidirectional communication in half-duplex configurations?
The SP1128FM supports input voltages up to +12 V on its RX lines, making it suitable for interfacing with 12-V industrial RS-232 drivers. However, it is not designed for bidirectional or half-duplex operation; it functions strictly as a unidirectional transceiver pair (TX and RX isolated). For half-duplex communication, additional switching circuitry would be required.
What happens to the SP1128FM outputs during power-up if the VCC ramp rate exceeds 100 mV/μs, and how does this affect downstream logic initialization?
Excessive VCC ramp rates (>100 mV/μs) may cause the internal charge pump to fail to initialize properly, leading to undefined output states during startup. To ensure reliable operation, designers should adhere to the recommended soft-start timing or add an RC filter at the VCC input to limit inrush slope.
Are there any known compatibility issues between the SP1128FM and certain crystal oscillators, and how should clock source selection impact jitter performance in serial communication?
The SP1128FM includes an internal crystal oscillator, but its frequency accuracy (±20%) is less precise than external crystals. Using low-jitter crystals (e.g., ±10 ppm) improves timing consistency in high-baud-rate applications. Mismatched crystal loads or poor PCB layout near the XTAL pins can degrade stability, so follow layout guidelines closely.
What precautions should be taken when using the SP1128FM in environments with frequent power cycling, and does it exhibit latch-up susceptibility under reverse polarity conditions?
The SP1128FM lacks reverse polarity protection on VCC, so applying negative voltage can damage the device. Implement series current-limiting resistors and consider adding a Schottky diode across VCC/GND to prevent catastrophic failure during accidental reverse insertion. Additionally, frequent power cycling stresses internal ESD structures; minimize cycling in mission-critical systems by ensuring stable auxiliary power rails.

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