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Microchip Technology SM16LC08/TR13
- Part No.:
- SM16LC08/TR13
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SM16LC08/TR13.pdf
- Description:
- TVS DIODE 8VWM 16SO
- Quantity:
- Payment:
- Shipping:
Inventory:7,279
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Product details
Overview
SM16LC08/TR13 from Microsemi is a 16-pin, 8-line unidirectional low-capacitance TVS diode array designed for board-level ESD/EFT protection of 3.3 V interfaces. It features 500 W peak pulse power (8/20 µs), 8.0 V standoff voltage (VWM), 9.0 V clamping voltage at 1 A, <1 µA reverse leakage at VWM, and 25 pF capacitance per line - deployed in RS-422/RS-449 data lines and WAN multiplexer I/O protection.
For engineers reviewing the SM16LC08/TR13 datasheet, SM16LC08/TR13 pinout, SM16LC08/TR13 application, or SM16LC08/TR13 equivalent, key selection criteria include unidirectional clamping behavior, SO-16 pin-compatible layout for 8-channel I/O protection, standoff voltage margin versus 3.3 V rail, and sub-25 pF line capacitance for >10 Mbps signal integrity.
Technical Context
The SM16LC08/TR13 implements eight independent unidirectional TVS diodes in a single SO-16 package, with pins 1–8 as anodes and pins 9–16 as cathodes - enabling electrically isolated, rail-to-rail transient suppression without shared ground paths. Its 8.0 V VWM and 9.0 V VC @1 A ensure safe operation above 3.3 V nominal supply while limiting overvoltage during IEC 61000-4-2 ±8 kV contact discharge events.
It meets IEC 61000-4-2 (ESD), IEC 61000-4-4 (EFT), and secondary lightning surge standards, with thermal stability across −55 °C to +150 °C and UL 94V-0 encapsulation. The device is not bidirectional; the SM16LC08C variant would be required for symmetrical protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Standoff Voltage (VWM) | 8.0 V - maximum continuous operating voltage before conduction; matches 3.3 V systems with sufficient margin against ripple and noise. |
| Clamping Voltage (VC @1 A) | 9.0 V - limits transient voltage seen by protected ICs during 8/20 µs surges, preserving 3.3 V logic integrity. |
| Peak Pulse Power | 500 W - sustains high-energy transients (IEC 61000-4-4 level 4) without failure, validated per Figure 1 waveform. |
| Capacitance per Line | 25 pF @ 1 MHz, 0 V - enables use on 10 Mbps RS-422/RS-449 links without signal rise-time degradation. |
| Operating Temperature | −55 °C to +150 °C - supports deployment in industrial and telecom chassis with wide ambient swings. |
| Package | SO-16 - surface-mount, tape-and-reel (TR13 = 2,500 pcs/reel), RoHS-compliant matte-tin plating. |
Pinout & Package
Molded SO-16 surface-mount package with pin #1 identified by dot marking; body weight ≈0.128 g; UL 94V-0 rated epoxy; tin-lead or RoHS matte-tin finish solderable per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1–8 | Anode (input side) | Each connects to one protected I/O line; biased negative relative to cathodes (pins 9–16) for unidirectional clamping to ground/VCC. |
| 9–16 | Cathode (common return) | Grouped return path - typically tied to local ground plane or protected VCC rail depending on protection topology. |
Key Features
| Feature | Design Value |
|---|---|
| Unidirectional 8-line architecture | Enables independent, polarity-specific protection of differential or single-ended buses without cross-talk between channels. |
| Low 25 pF line capacitance | Preserves signal integrity on high-speed interfaces up to 10 Mbps, minimizing jitter and edge distortion. |
| 500 W peak pulse rating (8/20 µs) | Withstands repeated IEC 61000-4-4 EFT bursts and secondary lightning-induced surges in telecom infrastructure. |
| Electrically isolated protection | Prevents ground loop coupling between protected lines via separate anode/cathode routing - critical for multi-drop RS-422. |
Applications
| RS-422/RS-449 Data Links | WAN Multiplexer I/O |
|---|---|
Use Scenario: Protecting full-duplex serial communication lines in industrial control gateways exposed to cable-induced ESD and EFT. IC Role / Device Role / Timing Role: Unidirectional TVS array clamping each TX/RX pair to ground, placed adjacent to connector entry points. Use Value: Maintains 10 Mbps data rate integrity while suppressing ±8 kV IEC 61000-4-2 transients without signal attenuation or timing skew. | Use Scenario: Safeguarding front-panel Ethernet and T1/E1 interface cards in carrier-class routers subject to field maintenance ESD events. IC Role / Device Role / Timing Role: Board-level transient suppressor for eight discrete I/O lanes, with cathodes routed to clean system ground. Use Value: Prevents latch-up or damage in PHY transceivers during hot-plug operations, extending mean time between failures (MTBF). |
| DRAM/SRAM Memory Buses | Low-Voltage HSIC Interfaces |
Use Scenario: Shielding address/data strobe lines on 3.3 V memory modules from handling-induced ESD in automated test equipment. IC Role / Device Role / Timing Role: Parallel-connected TVS diodes on each bus line, leveraging low capacitance to avoid setup/hold timing violations. Use Value: Adds <1 ns propagation delay while meeting JEDEC JS-001 Class 3B ESD immunity requirements. | Use Scenario: Protecting 3.3 V HSIC (High-Speed Inter-Chip) links between SoC and USB 3.0 companion chips in embedded computing modules. IC Role / Device Role / Timing Role: Low-capacitance unidirectional clamp on D+/D− and control lines, placed within 5 mm of connector. Use Value: Enables HSIC eye diagram compliance at 3.3 V supply with <25 pF loading - no equalization or retiming needed. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS array applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SM16LC08C/TR13 | Bidirectional version; same VWM (8 V), but symmetric clamping (VC = 12 V @1 A); higher capacitance (30 pF). | Required where signal polarity reverses (e.g., half-duplex RS-485) or AC-coupled lines exist. | Select only if bidirectional surge suppression is mandated; otherwise SM16LC08/TR13 offers lower capacitance and tighter clamping. |
| SMAJ8.0A | Single-line DO-214AC package; same VWM (8.0 V), VC = 12.5 V @1 A; 35 pF; no multi-line integration. | Used when space allows discrete placement per line or when SO-16 footprint is unavailable. | Choose for legacy designs or when channel isolation must exceed SO-16 internal coupling; adds PCB area and assembly cost. |
Compared with SM16LC08C/TR13 and SMAJ8.0A, the SM16LC08/TR13 delivers optimal balance of 8-channel integration, 9.0 V clamping, and 25 pF capacitance for 3.3 V high-speed unidirectional interfaces - reducing component count without sacrificing signal fidelity or surge margin.
Availability
SM16LC08/TR13 is available at Aetrix Electronics and suitable for RS-422/RS-449 data links, WAN multiplexer I/O protection, and low-voltage HSIC interface shielding requiring stable component supply and long-term industrial availability.
Supply support for SM16LC08/TR13 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
Microsemi (now part of Microchip Technology) is a U.S.-based semiconductor company specializing in high-reliability analog, mixed-signal, and radiation-hardened components for aerospace, defense, and industrial markets.
The SM16LCxx TVS Array series was developed specifically for board-level ESD/EFT protection of low-voltage digital interfaces - emphasizing low capacitance, precise standoff voltage grading, and SO-16 scalability across 3.3 V to 24 V systems.
FAQ
What is the standoff voltage rating of SM16LC08/TR13, and how does it relate to 3.3 V system protection?
The SM16LC08/TR13 has a standoff voltage (VWM) of 8.0 V, meaning it remains non-conductive below this DC or continuous peak voltage. This provides robust margin above 3.3 V nominal rails - accommodating typical 10% supply tolerance, ripple, and transient overshoot while ensuring reliable clamping only during actual ESD/EFT events. The SM16LC08/TR13 thus avoids false triggering yet maintains fast response to threats exceeding 8.0 V.
Is SM16LC08/TR13 compatible with RoHS-compliant manufacturing processes?
Yes, SM16LC08/TR13 is RoHS compliant, using matte-tin plating per MIL-STD-750 Method 2026. The "e3" suffix in the full ordering code (e.g., SM16LC08e3/TR13) explicitly denotes RoHS compliance, and the device meets lead-free reflow profiles including JEDEC J-STD-020 moisture sensitivity level 3. Aetrix Electronics supplies only RoHS-compliant lots of SM16LC08/TR13.
How does the pin configuration of SM16LC08/TR13 support unidirectional protection topologies?
SM16LC08/TR13 uses pins 1–8 as anodes and pins 9–16 as cathodes - enabling direct connection of each protected line to its dedicated anode, with all cathodes tied to a common reference (ground or VCC). This architecture supports both ground-referenced and VCC-referenced clamping, and eliminates inter-channel coupling since each TVS operates independently. Pinout is fixed and non-configurable.
Can SM16LC08/TR13 be used to protect bidirectional data lines like RS-485?
No - SM16LC08/TR13 is strictly unidirectional and unsuitable for bidirectional lines without external biasing. For RS-485 or other AC-signaled interfaces, the SM16LC08C/TR13 (bidirectional variant) must be used instead. Attempting to use SM16LC08/TR13 on bidirectional lines risks forward conduction during normal signal swings and inadequate negative-going transient suppression.
What is the clamping performance of SM16LC08/TR13 under IEC 61000-4-2 ESD stress?
Under IEC 61000-4-2 ±8 kV contact discharge, SM16LC08/TR13 clamps the protected line to ≤9.0 V at 1 A and ≤11.0 V at 5 A (per datasheet Figure 2). This limits voltage stress on downstream 3.3 V transceivers well below their absolute maximum ratings, preventing latch-up or oxide damage. Clamping response time is <1 ns, verified by TLP testing.
SM16LC08/TR13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 8
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 8V
- Voltage - Breakdown (Min):
- -
- Voltage - Clamping (Max) @ Ipp:
- -
- Current - Peak Pulse (10/1000µs):
- -
- Power - Peak Pulse:
- -
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SO
SM16LC08/TR13 FAQ
1.How can I place an order for SM16LC08/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SM16LC08/TR13 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 SM16LC08/TR13 reliable?
The price and inventory of SM16LC08/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM16LC08/TR13 is usually 5 days.
3.What payment methods are accepted for SM16LC08/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM16LC08/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM16LC08/TR13?
SM16LC08/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM16LC08/TR13 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 SM16LC08/TR13?
For technical support, including SM16LC08/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM16LC08/TR13 requirements.
6.How does Aetrix verify that SM16LC08/TR13 is sourced from the original manufacturer or authorized distributors?
All SM16LC08/TR13 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 SM16LC08/TR13 meets industry standards.
7.What is the process for return or replacement of SM16LC08/TR13?
All SM16LC08/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SM16LC08/TR13, 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 SM16LC08/TR13 part is unused and in its original packaging.
Return procedure for SM16LC08/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM16LC08/TR13 Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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ESD5Z3.3T1G
onsemi
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D5V0H1B2LP-7B
Diodes Incorporated
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D5V0P1B2LP-7B
Diodes Incorporated
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DESD5V0U1BA-7
Diodes Incorporated
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ESD5Z5.0T1G
onsemi
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DESD5V0U1BB-7
Diodes Incorporated
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D12V0L1B2LP-7B
Diodes Incorporated
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PESD2V0Y1BSFYL
Nexperia USA Inc.
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DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
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D5V0L1B2WS-7
Diodes Incorporated
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