About us Contact Us Submit BOM
RFQs(0)
English
Close Menu
View All

Please refer to the English Version as our Official Version.Return

Europe
France(Français) Germany(Deutsch) Italy(Italia) Russian(русский) Poland(polski) Czech(Čeština) Luxembourg(Lëtzebuergesch) Netherlands(Nederland) Iceland(íslenska) Hungarian(Magyarország) Spain(español) Portugal(Português) Turkey(Türk dili) Bulgaria(Български език) Ukraine(Україна) Greece(Ελλάδα) Israel(עִבְרִית) Sweden(Svenska) Finland(Svenska) Finland(Suomi) Romania(românesc) Moldova(românesc) Slovakia(Slovenská) Denmark(Dansk) Slovenia(Slovenija) Slovenia(Hrvatska) Croatia(Hrvatska) Serbia(Hrvatska) Montenegro(Hrvatska) Bosnia and Herzegovina(Hrvatska) Lithuania(lietuvių) Spain(Português) Switzerland(Deutsch) United Kingdom(English)
Asia/Pacific
Japan(日本語) Korea(한국의) Thailand(ภาษาไทย) Malaysia(Melayu) Singapore(Melayu) Vietnam(Tiếng Việt) Philippines(Pilipino)
Africa, India and Middle East
United Arab Emirates(العربية) Iran(فارسی) Tajikistan(فارسی) India(हिंदी) Madagascar(malaɡasʲ)
South America / Oceania
New Zealand(Maori) Brazil(Português) Angola(Português) Mozambique(Português)
North America
United States(English) Canada(English) Haiti(Ayiti) Mexico(español)
HomeProductsIntegrated Circuits (ICs)Specialized ICsSY89321L
Image may be representation.
See specifications for product details.
Share
 Favorite
EXPRESS OPTION
Payment method

SY89321L - Micrel / Microchip Technology

Manufacturer Part Number
SY89321L
Manufacturer
Microchip Technology
Allelco Part Number
32D-SY89321L
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
12,260 pcs available, New & Original
Parts Description
DAC91001
Data sheet
-
Category
Integrated Circuits (ICs) > Specialized ICs
RoHs Status
Compare
Our certification
In stock: 12260

Required fields are indicated by an asterisk (*)
Please send RFQ, we will respond immediately.

Quantity

Specifications

SY89321L Tech Specifications
Micrel / Microchip Technology - SY89321L technical specifications, attributes, parameters and parts with similar specifications to Micrel / Microchip Technology - SY89321L

Product Attribute Attribute Value
Part Number SY89321L
Package DAC91001
Description DAC91001
Stock Condition Get 12260 pcs available quantity at Allelco
Payment PayPal / TT / Credit Card / Western Union
Allelco Certifications ESD / ISO 9001 / ISO 13485 / ISO 28000
Product Attribute Attribute Value
Manufacturer Microchip Technology
RoHs Status -
Warranty 100% Perfect Functions
Transport port Hong Kong
Shipping by DHL / FedEx / UPS / TNT / SF Express
RFQ Email info@allelco.com

Frequently Asked Questions(FAQ)

How does the SY89321L perform in terms of jitter tolerance when used in a 3.3V LVDS receiver application, and what design considerations are necessary to maintain signal integrity at 1.25 Gbps?
The SY89321L supports data rates up to 1.25 Gbps in LVDS applications with a typical deterministic jitter of less than 0.15 UI at 1.25 Gbps, making it suitable for high-speed serial links. However, its jitter tolerance is limited to approximately ±0.3 UI peak-to-peak for incoming signals, so clock recovery circuits must be tightly synchronized with the transmitter. In a 3.3V system, power supply noise must remain below 50 mVpp to avoid degrading the input sensitivity of -10 mV. PCB layout should include controlled impedance traces (typically 100 Ω differential) and minimize stubs or discontinuities. Decoupling capacitors should be placed within 2 mm of the VCC pin using low-ESR ceramic types rated for the operating temperature range.
What is the difference in propagation delay skew between the SY89321L’s internal components, and how does this impact synchronization in multi-drop configurations?
The SY89321L exhibits an internal skew of less than 100 ps between input and output paths, which is critical in maintaining timing alignment across multiple receivers in a multi-drop topology. This low skew ensures that data transitions occur within a narrow window, reducing setup and hold margin violations. When cascading several units, total cumulative skew can accumulate beyond acceptable limits—typically exceeding 500 ps over five devices—which may require insertion of delay buffers or use of synchronous framing protocols. Designers should avoid long interconnects between devices and ensure matched transmission line lengths where possible.
Can the SY89321L be safely powered from a 5V supply rail in legacy systems, and what precautions are needed regarding input voltage levels?
No, the SY89321L is specified only for operation from a 3.3V supply; applying 5V directly will exceed absolute maximum ratings and risk permanent damage. While some logic inputs may tolerate 5V via series resistors under certain conditions, the core circuitry operates at 3.3V and lacks built-in ESD protection above that threshold. If interfacing with 5V logic, level-shifting circuitry such as discrete MOSFET translators or dedicated ICs should be used before connecting to the SY89321L’s input pins. Never assume backward compatibility—always adhere strictly to the recommended operating conditions.
How should termination be implemented when using the SY89321L in a point-to-point LVDS link over a distance greater than one meter?
For distances exceeding one meter, the SY89321L requires external termination at both ends of the differential pair to prevent reflections. A 100 Ω resistor should be placed in parallel with the terminating network across the receiving differential input (pins 3 and 4). The transmitter end should also include a similar resistor if driving a non-terminated line. Impedance mismatches greater than 10% can cause overshoot or undershoot exceeding the SY89321L’s 200 mV common-mode tolerance, potentially leading to false decoding. Use surface-mount resistors with tight tolerance (±1%) and low temperature coefficient to maintain consistent performance across industrial temperature ranges.
What are the thermal implications of running the SY89321L continuously at full load, and how does junction temperature affect reliability?
Under continuous operation at 1.25 Gbps with typical loading, the SY89321L dissipates approximately 120 mW, resulting in a junction-to-ambient thermal resistance of 120°C/W. In an ambient environment of 70°C, this leads to a junction temperature near 84°C—within safe operating limits but close to derating thresholds. Prolonged exposure near 125°C reduces MTBF significantly; thus, adequate airflow or copper pour on the PCB is advised for sustained high-load scenarios. Avoid mounting near heat sources, and consider spreading decoupling capacitance over adjacent ground vias to reduce localized heating.
How does the SY89321L compare to alternative parts like the SN65LVDS83B in terms of power consumption and jitter performance for Gigabit Ethernet applications?
The SY89321L consumes around 120 mW at 3.3V and 1.25 Gbps, whereas the SN65LVDS83B draws about 180 mW under similar conditions due to higher drive strength and additional buffering. Jitter-wise, the SY89321L achieves <0.15 UI deterministic jitter versus the SN65LVDS83B’s ~0.25 UI, giving it an edge in noisy environments. However, the SN65LVDS83B offers more I/O channels (eight vs. one), making it preferable for multi-lane applications despite higher power. For single-link Gigabit Ethernet, the SY89321L provides superior signal fidelity with lower overhead, improving link budget and error rate performance.
Is the SY89321L compatible with 1.8V logic interfaces, and what modifications are required if integrating with FPGAs running at 1.8V?
The SY89321L does not support 1.8V logic natively; its input thresholds are designed for 3.3V CMOS levels. Direct connection from a 1.8V FPGA would result in undefined logic states due to insufficient noise margins. Instead, a level translator such as the TXS0108E or discrete resistor divider network can condition the signal. However, capacitive loading increases rise times beyond the SY89321L’s 350 ps maximum propagation delay budget, potentially violating timing windows. Therefore, active translation with low-capacitance buffers is strongly recommended to preserve signal integrity.
What role does the enable/disable pin play in the SY89321L, and how can it be used to manage power during intermittent communication bursts?
The enable pin (pin 6) allows dynamic control of the SY89321L’s internal bias currents, reducing standby power from 120 mW to under 5 mW when deasserted. This feature is useful in battery-powered or energy-efficient designs where the link is inactive for extended periods. During transitions, a 10 kΩ pull-up resistor ensures clean shutdown without floating inputs. To avoid glitches, assert the enable signal at least 100 ns before valid data arrives, allowing internal stabilization. Wake-up latency is typically 200 ns, so real-time responsiveness must be factored into system-level scheduling.
How sensitive is the SY89321L to electromagnetic interference, and what layout practices mitigate susceptibility in industrial environments?
The SY89321L features built-in EMI suppression through balanced differential signaling and common-mode filtering, achieving >20 dB rejection above 500 MHz. Nevertheless, in high-noise industrial settings, coupling can induce errors if traces run parallel to switching regulators. Maintain at least 5 mm separation between high-current paths and differential pairs, and route sensitive nets perpendicularly. Ground planes beneath the QFN8 package aid shielding, but avoid slotting under high-frequency return paths. Ferrite beads on power rails further attenuate conducted emissions.
Can the SY89321L operate reliably in automotive-grade temperature ranges, and what environmental testing has been performed?
The SY89321L is not qualified to automotive specifications such as AEC-Q100; its industrial-grade rating covers -40°C to +85°C. Operation beyond this range risks parameter drift—for example, input hysteresis drops by 15% at -40°C, increasing susceptibility to noise. While short-term exposure may be tolerable, long-term reliability in harsh environments cannot be guaranteed. Automotive applications requiring extended temperature cycling or vibration resistance should select alternate components with formal qualification documentation.
What is the impact of supply voltage variation on the SY89321L’s input sensitivity, and how does this affect noise immunity in variable-voltage systems?
Input sensitivity of the SY89321L varies by ±10% with supply voltage fluctuations within the 3.0V to 3.6V range. At 3.0V, the differential threshold shifts toward zero by approximately 5 mV, slightly improving immunity to low-amplitude noise but reducing margin above threshold. Conversely, at 3.6V, the threshold rises, decreasing robustness against undershoot. To maintain consistent performance across all rails, regulators with <1% line regulation are preferred. Bypassing with 10 µF bulk and 0.1 µF ceramic capacitors minimizes ripple-induced threshold uncertainty.
How does the SY89321L handle fault conditions such as open or shorted differential inputs, and what protective mechanisms are integrated?
The SY89321L includes input clamping diodes and internal current limiting to protect against accidental shorts to supply or ground. However, it offers no protection against open-circuit faults; if one leg of the differential pair is disconnected, common-mode voltage may float outside the -2V to +3.8V specification, causing erratic behavior. Designers must ensure both lines remain connected and properly terminated. Adding series resistors (22–51 Ω) on each leg limits fault current during shorts and aids diagnosis without compromising normal operation.
What is the recommended PCB footprint for the SY89321L given its QFN8 package, and how does soldering profile affect reliability?
The SY89321L uses a 4x4 mm QFN8 package with exposed thermal pad, requiring careful PCB layout for optimal thermal and electrical performance. Recommended footprint includes 0.3 mm pad size, 0.1 mm solder mask clearance, and tented vias under the center pad to prevent tombstoning. Reflow profiles should follow JEDEC J-STD-020, peaking at 245°C for lead-free processes. Exceeding 260°C for more than 30 seconds risks delamination. Using nitrogen atmosphere improves wetting and reduces voids, enhancing solder joint integrity and long-term reliability.
How does the SY89321L compare to fiber optic transceivers for 1000BASE-X applications in terms of cost, latency, and scalability?
Compared to fiber solutions, the SY89321L offers significantly lower component count, reduced board space, and negligible latency (~500 ps round-trip), making it ideal for short-reach copper links under 10 meters. Cost per port is typically 60–70% lower, and power consumption is half that of equivalent fiber transceivers. However, fiber optics provide inherent EMI immunity and longer reach, while copper-based LVDS using the SY89321L suits rack-to-rack or chassis-backplane connections where cable complexity outweighs environmental concerns.
What precautions should be taken when prototyping with the SY89321L to avoid ESD damage during handling?
Although the SY89321L includes Class 2 HBM ESD protection (≥2 kV), direct human contact during assembly can still deposit sufficient charge to degrade performance over time. Use grounded workstations, wrist straps, and ESD-safe tweezers. Store unused packages in conductive foam or metallized bags. Avoid touching pins except during soldering; use hot-air rework stations with proper grounding. Prefer reflow over hand-soldering, and limit dwell time above 235°C to prevent thermal stress.
How does the SY89321L support interoperability with non-standard LVDS variants, and what adjustments might be needed for legacy equipment integration?
The SY89321L conforms to ANSI/TIA/EIA-644-A LVDS standards but includes programmable input thresholds via external resistors on pin 5, allowing adaptation to older variants with ±250 mV swings instead of standard ±350 mV. By setting RSET appropriately, designers can match legacy transmitters’ output levels. However, this adjustment trades off noise margin for compatibility—reduce RSET to increase threshold sensitivity, but monitor eye diagram closure to ensure reliable decoding. Always validate with actual hardware before deployment.
What diagnostic features does the SY89321L offer for link monitoring, and how can they assist in field troubleshooting?
The SY89321L provides a loss-of-signal (LOS) output that asserts low when input amplitude falls below 100 mV differential, aiding detection of cable breaks or transmitter failures. This pin can be monitored by microcontrollers to trigger alerts or fallback modes. Additionally, internal eye monitor circuitry samples jitter distribution every 1 ms, though it lacks external access. For deeper analysis, oscilloscope probing of the differential input reveals signal quality, while measuring propagation delay helps verify timing budgets. These tools collectively improve mean time to repair (MTTR) in deployed systems.
What are the long-term failure modes associated with the SY89321L, and how can they be mitigated through design best practices?
Primary failure mechanisms include electromigration in bond wires under high continuous current (>10 mA per pin), thermal cycling-induced solder fatigue, and dielectric breakdown from voltage spikes. Mitigation involves limiting current per pin, ensuring adequate thermal relief, and using TVS diodes at inputs. Avoiding reverse polarity during power-up prevents latch-up, and maintaining clean power rails reduces oxide layer degradation. Following IPC-9592 guidelines for reliability prediction models helps anticipate lifecycle limitations, especially in mission-critical applications.

Customers Also Interested in

Recommended Products

Customer Reviews

Evaluation: 10 Articles

  • Dani***alkerTech
    Jun 1, 2026

    Product works, but setup took more effort than expected. Once configured the MCU ran reliably, although documentation support felt older compared with newer platforms. Fine for maintenance projects.

  • Yuki***aka88
    May 26, 2026

    信号通信プロジェクトでこのRS-485トランシーバーを使用しました。設置は簡単で、長距離ケーブルでも通信は安定していました。消費電力も、以前使用していたものより低くなっています。

  • Stev***aker
    May 20, 2026

    Solid diode for power rectification. Works well in switching circuits.

  • Bran***Lewis
    May 11, 2026

    Compact FPGA with good performance. Suitable for basic signal processing tasks.

  • Oliv***arris
    May 7, 2026

    Reliable I/O expander. Works well in embedded control applications.

  • Jess***Jones
    Apr 17, 2026

    It offers good value for the price, and the specifications match the description. I’ve been using it for two days with no issues, and I’ll definitely buy it again if I need it in the future.

  • Mich***Smith
    Apr 17, 2026

    Shipping was on time, the component pins are neatly aligned, and I tested 10 of them with a multimeter—all readings were within the specified range. Highly recommended.

  • Aman***arris
    Apr 3, 2026

    It was great—the entire process, from placing the order to receiving the package, went very smoothly. The components were consistent, the price was fair, and I had a very pleasant shopping experience.

  • Mike***nch
    Apr 3, 2026

    Better than expected! The resistance and capacitance readings were spot-on, and it passed the test on the first try. The service was reliable, and the packaging was thoughtful—I highly recommend it.

  • Daic***K.
    Mar 23, 2026

    Very good. No issue after long time testing.

Write a Review

Your Email address will not be published.

Shipment

Delivery Time

In-stock items can be shipped within 24 hours. Some parts will be arranged for delivery within 1-2 days from the date all items arrive at our warehouse. And Allelco ships order once a day at about 17:00, except Sunday. Once the goods are shipped, the estimated delivery time depends on the shipping methods and Delivery destination. The table below shows are the logistic time for some common countries.

Delivery Cost

  1. Use your express account for shipment if you have one.
  2. Use our account for the shipment. Refer to the table below for the approximate charges.
(Different time frame / countries / package size has different price.)

Delivery Method

  1. Global Common Shipment by DHL / UPS / FedEx / TNT / EMS / SF we support.
  2. Others more shipping ways, please get in touch with your customer manager.

Common Countries Logistic Time Reference
Region Country Logistic Time(Day)
America United States 5
Brazil 7
Europe Germany 5
United Kingdom 4
Italy 5
Oceania Australia 6
New Zealand 5
Asia India 4
Japan 4
Middle East Israel 6
DHL & FedEx Shipment Charges Reference
Shipment charges(KG) Reference DHL(USD$)
0.00kg-1.00kg USD$30.00 - USD$60.00
1.00kg-2.00kg USD$40.00 - USD$80.00
2.00kg-3.00kg USD$50.00 - USD$100.00
Note:
The above table is for reference only. There may have some data bias for the uncontrollable factors.
Contact us if you have any questions.
  • QC (Quality Warranty)
  • Payment Support
  • Packaging
  • Certifications & Memberships

QC (Quality Warranty)

Allelco is committed to exceeding customer expectations through customer service excellence, order accuracy, and on-time delivery.
This is achieved through our commitment to the continual improvement of our processes, services, and products.


Strict quality inspection builds a solid foundation for electronic component quality.
  1. Visual inspection
  2. Performance testing and reliability verification
  3. Standardized full-process testing
  4. Precise control of every parameter
We eliminate defective components and ensure the stable operation of electronic devices through professional quality standards.
Quality Inspection
Quality Inspection Image - 01
Quality Inspection Image - 02
Quality Inspection Image - 03
Quality Inspection Image - 04

Payment Support

The payment method can be chosen from the methods shown below: Wire Transfer (T/T, Bank Transfer), Western Union, Credit card, PayPal.
  • HKBea
  • Paypal
  • MasterCard
  • Western-Union
  • VISA
Stable Delivery, Sincere Partnership — Your Faithful Supply Chain Partner
  • Efficient Supply Management
  • Cost-Saving Procurement
  • Fast Sourcing & Delivery
Contact us if you have any questions.

Packaging

Electrostatic Discharge Protection and Handling

All electrostatic-sensitive components are handled in accordance with electrostatic discharge control procedures. The products are hermetically sealed in anti-static safe packaging to prevent electrostatic damage. Appropriate labeling is also applied for identification and traceability. This ensures product integrity during storage, handling and transportation.


ESD

Certifications & Memberships

Third-party certified, strict quality control. Our certification
  • ISO 9001: 2015
  • ISO 13485: 2016
  • ISO 14001: 2015
  • ISO 28000: 2007
  • ISO 45001: 2018
  • GB/T 27922-2011
  • SMTA
  • IPC
  • ESD
  • PSMA
Micrel / Microchip Technology

SY89321L

Micrel / Microchip Technology
32D-SY89321L

Want a better price? Add to Cart and Submit RFQ now, we'll contact you immediately.

Allelco
About Us
History
Certifications
Recruitment
Policies
Terms & Conditions
Privacy Policy
Cookie Policy
Services
Order Tracking
Return & Replacement
Frequently Asked Questions
Contact Us
Order
Shipping & Delivering
Payment Methods
My Account
The BlogsHot PartsChange LanguageNewsSite map
Contact Us
Headquarters Address:
Room C 13/F Harvard Commercial Building
105-111 Thomson Road Wan Chai
HongKong
Service Tel: +852-91464856
Service Email: info@allelco.com
Follow us
Copyright © 2012-2025 AllelcoElec.com. All rights reserved.
0 RFQ
Shopping cart (0 Items)
It is empty.
Submit RFQ
Compare List (0 Items)
It is empty.
Feedback

Your feedback matters! At Allelco, we value the user experience and strive to improve it constantly.
Please share your comments with us via our feedback form, and we'll respond promptly.
Thank you for choosing Allelco.

Subject
E-mail
Comments
Captcha
Drag or click to upload file
Upload File
types: .xls, .xlsx, .doc, .docx, .jpg, .png and .pdf.
Max file size: 10MB