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Microchip Technology SY10E446JC-TR
- Part No.:
- SY10E446JC-TR
- Manufacturer:
- Microchip Technology
- Category:
- Specialized
- Package:
- 28-LCC (J-Lead)
- Datasheet:
-
SY10E446JC-TR.pdf
- Description:
- IC INTERFACE SPECIALIZED 28PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:1,581
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Product details
Overview
SY10E446JC-TR from Micrel is a 4-bit parallel-to-serial converter IC designed for high-speed NRZ data transmission at up to 1.6 Gb/s, featuring differential clock and serial I/O, on-chip ÷4 and ÷8 clock generation, and MODE-selectable 4-/8-bit conversion via cascading. It operates with ECL-compatible –4.2 V to –5.5 V VEE supply and targets telecom line-card timing and backplane serializer applications.
For engineers reviewing the SY10E446JC-TR datasheet, SY10E446JC-TR pinout, SY10E446JC-TR application, or SY10E446JC-TR equivalent, key selection criteria include its 1.3 Gb/s guaranteed minimum conversion rate, asynchronous SYNC reset capability, differential CL/4 and CL/8 outputs, VBB reference for single-ended interfacing, and compatibility with MC10E/100E446 systems.
Technical Context
The SY10E446JC-TR implements a synchronous 4-stage shift register driven by differential CLK, converting D0–D3 in LSB-first order into a serialized SOUT stream triggered on negative clock edges. Its internal divide-by-4 and divide-by-8 circuits generate CL/4 and CL/8 outputs for local clock distribution and multi-device synchronization.
Conversion mode is controlled by the MODE pin: low (or open) enables standalone 4-bit operation; high enables cascaded 8-bit mode using two devices, where the first device's SOUT drives the second's SIN. The SYNC input asynchronously resets internal clock dividers and shift register state without requiring clock alignment.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Max Data Rate | 1.6 Gb/s typical NRZ serial output - supports high-bandwidth backplane links |
| Min Conversion Frequency | 1.3 Gb/s guaranteed - ensures timing margin for production-grade telecom interfaces |
| Propagation Delay (CLK→SOUT) | 1000–1700 ps - defines maximum achievable clock period in cascade configurations |
| Input Voltage Range (VEE) | –4.2 V to –5.5 V - enables interoperability with legacy ECL-100K and PECL systems |
| VBB Reference Output | –1.38 V to –1.19 V - provides precise switching threshold for single-ended SIN signal conditioning |
| Power Supply Current | 110–132 mA - determines thermal load and decoupling requirements on VEE rail |
| Set-up Time (SIN) | –400 ps minimum - requires early arrival of serial input relative to CLK edge for reliable latching |
Pinout & Package
SY10E446JC-TR is housed in a 28-pin PLCC (J28-1) package with gull-wing leads, Sn-Pb finish, and commercial temperature range (0°C to +85°C). Pin 1 is located at the top-left corner adjacent to the index notch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SIN, SIN | Differential Serial Data Input | Accepts serialized data from upstream device; used for cascading in 8-bit mode |
| D0–D3 | Parallel Data Inputs | LSB-first 4-bit parallel bus; sampled synchronously on CLK edge |
| SOUT, SOUT | Differential Serial Data Output | NRZ-encoded output stream; triggered on negative CLK edge |
| CLK, CLK | Differential Clock Input | Primary timing reference; drives internal shift register and dividers |
| CL/4, CL/4 | Differential ÷4 Clock Output | Provides synchronized ¼-rate clock for local logic or downstream devices |
| CL/8, CL/8 | Differential ÷8 Clock Output | Provides synchronized ⅛-rate clock for control or monitoring functions |
| MODE | Conversion Mode Select | LOW = 4-bit mode; HIGH = enables 8-bit cascade with second SY10E446JC-TR |
| SYNC | Asynchronous Reset Input | Resets internal clock dividers and shift register state independently of CLK |
| VBB | Internal Reference Voltage | –1.3 V nominal; used as bias for single-ended SIN interface or AC coupling |
| VCCO | Output Power Supply | Connected to ground for ECL operation; supplies output driver termination |
| VEE | Negative Power Supply | –4.2 V to –5.5 V; powers all internal logic and output stages |
| VCC | Positive Power Supply | Tied to ground; not active in standard ECL configuration |
Key Features
| Feature | Design Value |
|---|---|
| On-chip ÷4 and ÷8 clock generation | Eliminates external clock dividers; reduces jitter accumulation and board space in serializer timing trees |
| Asynchronous SYNC reset | Enables deterministic re-synchronization of serial output phase without waiting for clock alignment |
| MODE-selectable 4-/8-bit operation | Supports flexible system architecture: single-chip 4-bit or dual-chip 8-bit without redesigning PCB layout |
| Integrated 75 kΩ input pulldowns | Ensures defined logic state on unused inputs; avoids floating nodes and EMI susceptibility |
| VBB reference output | Enables robust single-ended SIN interface at <500 MHz while maintaining compatibility with differential paths |
| Full MC10E/100E446 compatibility | Allows drop-in replacement in existing designs using Motorola's ECL logic family |
Applications
| Telecom Line-Card Serializer | Backplane Data Multiplexing |
|---|---|
Use Scenario: Aggregating four 311 Mbps DS3 channels into a single 1.244 Gbps STS-12 serial stream for OC-12 optical transport. IC Role / Device Role / Timing Role: Parallel-to-serial converter providing NRZ serialization with deterministic phase alignment via SYNC. Use Value: Enables full-rate DS3 multiplexing within 1.3 Gb/s minimum spec, meeting SONET jitter and bit-error-rate requirements. |
Use Scenario: Combining four independent processor memory buses onto a shared high-speed backplane link. IC Role / Device Role / Timing Role: High-speed data formatter generating time-multiplexed payload with synchronized CL/4 clock for receiver deskew. Use Value: Reduces interconnect count by 75% while preserving per-lane timing integrity through differential CL/4 distribution. |
| Test Equipment Pattern Generator | Legacy ECL System Upgrade |
Use Scenario: Generating calibrated PRBS sequences for jitter tolerance testing of 1.25 Gbps Ethernet PHYs. IC Role / Device Role / Timing Role: Deterministic bit-sequence generator with programmable start point via SYNC and MODE control. Use Value: Delivers sub-200 ps setup margin and <1.7 ns CLK→SOUT delay, enabling precise edge placement in automated test fixtures. |
Use Scenario: Replacing obsolete MC10E446 in military avionics timing modules requiring extended VEE range support. IC Role / Device Role / Timing Role: Pin-compatible ECL serializer with –4.2 V to –5.5 V VEE tolerance for ruggedized power supplies. Use Value: Maintains functional equivalence while supporting wider supply variation and improved thermal stability over temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar parallel-to-serial conversion applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SY100E446JC-TR | Higher VEE tolerance (–4.2 V to –5.5 V same), but rated for 100E speed grade: identical AC specs, enhanced noise immunity | Preferred for new designs targeting MIL-STD-883 screening or higher EMI environments | Select SY100E446JC-TR when long-term reliability under voltage transients or radiated RF is critical |
| MC10E446FN | Motorola original; same pinout and function, but limited to –4.5 V to –5.2 V VEE and no VBB output | Required only for exact legacy replacements where VBB usage is absent and qualification history is mandated | Choose MC10E446FN solely for certified heritage systems where component pedigree overrides feature upgrades |
Compared with SY10E446JC-TR, SY100E446JC-TR offers identical functionality with improved noise margin, while MC10E446FN lacks VBB and has narrower VEE range-making SY10E446JC-TR the optimal balance of modern features and backward compatibility.
Availability
SY10E446JC-TR is available at Aetrix Electronics and suitable for telecom infrastructure, high-speed test equipment, and legacy ECL system upgrades requiring stable component supply, long-lifecycle support, and traceable sourcing.
Supply support for SY10E446JC-TR 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
Micrel, Inc. was a U.S.-based semiconductor company specializing in high-performance analog, RF, and timing solutions before its acquisition by Microchip Technology in 2015.
The SY10E446JC-TR belongs to Micrel's 10E ECL logic family, engineered for high-speed data conversion in telecom, networking, and instrumentation systems requiring sub-nanosecond timing precision.
FAQ
What is the guaranteed minimum data rate for the SY10E446JC-TR?
The SY10E446JC-TR guarantees a minimum conversion frequency of 1.3 Gb/s for NRZ data under all operating conditions (0°C to +85°C). This specification is validated across voltage and process corners and appears in the AC Electrical Characteristics table as fMAX (Min.) - ensuring reliable performance in production telecom line cards and test equipment where timing margin is critical.
How does the MODE pin affect operation of the SY10E446JC-TR?
The MODE pin selects between 4-bit and 8-bit conversion modes: when pulled LOW or left open, the SY10E446JC-TR operates as a standalone 4-bit parallel-to-serial converter; when driven HIGH, it configures the internal load clock for use with a second SY10E446JC-TR in cascade to implement an 8-bit function. This is confirmed in the Truth Table and Applications Information sections of the datasheet.
Can the SY10E446JC-TR be used with single-ended inputs?
Yes - the SY10E446JC-TR provides a VBB pin that supplies a –1.3 V reference for single-ended SIN interfacing. When used, VBB is tied to the inverting differential input and bypassed with a 0.01 µF capacitor. The datasheet explicitly states this method is valid for clock rates below 500 MHz and confirms VBB output voltage range as –1.38 V to –1.19 V across temperature.
What is the purpose of the SYNC input on the SY10E446JC-TR?
The SYNC input on the SY10E446JC-TR provides asynchronous reset of the internal clock divider and shift register, allowing deterministic restart of the conversion sequence without waiting for clock alignment. Its 500 ps reset recovery time (tRR) and 500–1100 ps propagation delay to CL/4/CL/8 outputs are specified in the AC Electrical Characteristics table, enabling precise phase control in multi-device timing chains.
Is the SY10E446JC-TR pin-compatible with the MC10E446?
Yes - the SY10E446JC-TR is fully compatible with the Motorola MC10E446, sharing identical pinout, function mapping, and AC/DC specifications. The datasheet explicitly states "Fully compatible with Motorola MC10E/100E446" and confirms matching PLCC-28 (J28-1) packaging, terminal assignments, and truth table behavior - enabling direct replacement in legacy designs.
SY10E446JC-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 28-LCC (J-Lead)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Applications:
- Data Transport
- Interface:
- Parallel/Serial
- Voltage - Supply:
- -
- Supplier Device Package:
- 28-PLCC (11.48x11.48)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
SY10E446JC-TR FAQ
1.How can I place an order for SY10E446JC-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for SY10E446JC-TR 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 SY10E446JC-TR reliable?
The price and inventory of SY10E446JC-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SY10E446JC-TR is usually 5 days.
3.What payment methods are accepted for SY10E446JC-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SY10E446JC-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SY10E446JC-TR?
SY10E446JC-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SY10E446JC-TR 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 SY10E446JC-TR?
For technical support, including SY10E446JC-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SY10E446JC-TR requirements.
6.How does Aetrix verify that SY10E446JC-TR is sourced from the original manufacturer or authorized distributors?
All SY10E446JC-TR 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 SY10E446JC-TR meets industry standards.
7.What is the process for return or replacement of SY10E446JC-TR?
All SY10E446JC-TR units undergo pre-shipment inspection (PSI). If there is an issue with SY10E446JC-TR, 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 SY10E446JC-TR part is unused and in its original packaging.
Return procedure for SY10E446JC-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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