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Microchip Technology SM1603E3/TR13
- Part No.:
- SM1603E3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SM1603E3/TR13.pdf
- Description:
- TVS DIODE 3.3VWM 9VC 16SO
- Quantity:
- Payment:
- Shipping:
Inventory:3,480
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Product details
Overview
SM1603E3/TR13 from Microsemi (now Microchip) is a unidirectional 8-line transient voltage suppressor (TVS) diode array in SO-16 package, rated for 300 W peak pulse power (8/20 µs), 3.3 V stand-off voltage (VWM), and clamping voltage of 7 V at 1 A. It protects low-voltage I/O interfaces including DRAM, SRAM, and HSIC against ESD per IEC 61000-4-2 and EFT per IEC 61000-4-4.
For engineers reviewing the SM1603E3/TR13 datasheet, SM1603E3/TR13 pinout, SM1603E3/TR13 application, or SM1603E3/TR13 equivalent, key selection criteria include stand-off voltage matching system operating voltage, clamping performance under 1–5 A transients, SO-16 footprint compatibility, UL 94V-0 flammability rating, and bidirectional vs. unidirectional configuration - critical for signal integrity in 3.3 V data buses.
Technical Context
The SM1603E3/TR13 implements eight independent unidirectional TVS diodes in a single SO-16 surface-mount package, each with anode-cathode configuration referenced to common ground. Its breakdown voltage (VBR) is 4.0 V min / 5.0 V max at 1 mA, ensuring reliable turn-on before damage to 3.3 V logic.
Designed for board-level protection, it operates across –55 °C to +150 °C and meets IEC 61000-4-2 (±15 kV contact, ±20 kV air) and IEC 61000-4-4 (40 A, 5/50 ns) immunity requirements. Leakage current remains ≤125 µA at 3.3 V stand-off, minimizing standby power impact on sensitive CMOS inputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VWM) | 3.3 V - Matches nominal 3.3 V supply rails without false triggering during normal operation |
| Breakdown Voltage (VBR) | 4.0–5.0 V @ 1 mA - Ensures robust turn-on margin above VWM while staying below 3.3 V logic damage thresholds |
| Clamping Voltage (VC) | 7 V @ 1 A - Limits transient overvoltage to safe levels for 3.3 V I/O pins during ESD events |
| Peak Pulse Power | 300 W @ 8/20 µs - Sustains high-energy surges typical of lightning-induced secondary transients |
| Leakage Current (ID) | ≤125 µA @ VWM - Prevents signal degradation or DC loading on high-impedance CMOS/SRAM inputs |
| Capacitance (C) | 850 pF @ 0 V, 1 MHz - Compatible with low-speed to medium-speed digital interfaces (e.g., UART, SMBus, GPIO) |
| Operating Temperature | –55 °C to +150 °C - Supports automotive under-hood and industrial control environments |
Pinout & Package
Molded SO-16 surface-mount package, UL 94V-0 compliant, 0.128 g weight, pin #1 identified by dot marking. Body marked with Microsemi logo and device code.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 3, 5, 7, 9, 11, 13, 15 | Anode (per channel) | Input line connection point; each tied to protected I/O trace (e.g., USB D+, CAN_H, UART_TX) |
| 2, 4, 6, 8, 10, 12, 14, 16 | Cathode (common ground) | Shared low-inductance return path to PCB ground plane - critical for effective transient shunting |
| Pin #1 | Reference marker | Dot-marked corner; ensures correct orientation during automated placement and visual inspection |
Key Features
| Feature | Design Value |
|---|---|
| Unidirectional 8-line protection | Enables asymmetric clamping optimized for positive-only transients on grounded I/O systems |
| SO-16 surface-mount packaging | Supports high-density PCB layouts with standardized pick-and-place compatibility and thermal relief via exposed pad (if used) |
| Electrically isolated channels | Prevents cross-talk between protected lines - essential for multi-channel serial buses like RS-485 or parallel memory interfaces |
| UL 94V-0 encapsulation | Meets flame-retardancy requirements for industrial and transportation end equipment certifications |
Applications
| Industrial HMI Panels | Automotive Infotainment I/O |
|---|---|
Use Scenario: Touchscreen controller interface exposed to ESD during user interaction in factory-floor HMIs. IC Role / Device Role / Timing Role: TVS array clamps fast-rising ESD pulses on I²C and GPIO lines before they reach the microcontroller's input buffers. Use Value: Prevents latch-up and permanent gate oxide damage in 3.3 V ARM-based HMI SoCs, maintaining functional safety compliance. | Use Scenario: USB 2.0 and UART connections between head unit and rear-seat display modules subject to cable discharge events. IC Role / Device Role / Timing Role: Unidirectional suppression on data lines referenced to chassis ground, preserving signal integrity during hot-plug transients. Use Value: Maintains <5 ns response time and sub-7 V clamping to avoid USB PHY reset or UART framing errors. |
| Telecom Base Station Control Cards | Medical Patient Monitor Front-Panel Interfaces |
Use Scenario: Management interface (RS-232/RS-485) on remote radio unit control boards exposed to induced surges in outdoor cabinets. IC Role / Device Role / Timing Role: Eight-channel protection for bidirectional control lines, with shared cathode grounding to minimize PCB routing complexity. Use Value: Withstands 300 W surge energy without degradation, supporting long-term reliability in unattended telecom infrastructure. | Use Scenario: Keypad, LED indicator, and sensor input traces on Class II medical devices requiring IEC 60601-1-2 ESD immunity. IC Role / Device Role / Timing Role: Board-level transient suppression on low-power 3.3 V microcontroller peripherals with strict leakage limits. Use Value: ≤125 µA leakage avoids interference with analog front-end biasing and ensures EMC test pass margin. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ3.3A | Single-line SMA package; 400 W peak power; higher VC (11.2 V @ 1 A) | Requires 8 discrete placements vs. single SO-16; less space-efficient for multi-line protection | Preferred only when board layout allows discrete placement and higher clamping voltage is acceptable |
| SP1003-030 | Unidirectional 8-line SO-16; lower capacitance (30 pF); 150 W peak power | Better for high-speed USB or HDMI; insufficient for 300 W lightning-survivable designs | Select when protecting >10 Mbps interfaces where 850 pF would degrade rise time |
Compared with SMAJ3.3A and SP1003-030, the SM1603E3/TR13 delivers optimal balance of multi-line integration, 300 W surge handling, and 3.3 V system compatibility - making it preferred for space-constrained industrial and automotive control boards where coordinated clamping across multiple I/Os is required.
Availability
SM1603E3/TR13 is available at Aetrix Electronics and suitable for industrial HMI panels, automotive infotainment gateways, and telecom base station control cards requiring stable component supply and long-lifecycle support.
Supply support for SM1603E3/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 (acquired by Microchip Technology in 2018) 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 SM16XX TVSarray™ series was designed specifically for board-level ESD/EFT protection of low-voltage digital interfaces in harsh electromagnetic environments - emphasizing robustness, compact integration, and compliance with IEC 61000-4-x standards.
FAQ
What is the stand-off voltage of SM1603E3/TR13, and why is it important for 3.3 V systems?
The SM1603E3/TR13 has a stand-off voltage (VWM) of 3.3 V, meaning it remains non-conductive during normal 3.3 V operation. This prevents false triggering while allowing immediate clamping when transients exceed ~4 V. For SM1603E3/TR13, this ensures compatibility with standard 3.3 V logic families without affecting signal integrity or increasing static power consumption.
Is SM1603E3/TR13 unidirectional or bidirectional, and how does that affect its use case?
SM1603E3/TR13 is unidirectional - each channel conducts only for positive transients relative to ground. This makes it ideal for single-ended, ground-referenced I/O like UART, SPI, or GPIO where negative excursions are not expected. Unlike bidirectional variants (e.g., SM1603C), SM1603E3/TR13 avoids unnecessary capacitance and leakage on lines that don't require symmetrical protection.
What is the clamping voltage of SM1603E3/TR13 at 5 A, and how does it compare to 1 A performance?
Per the MSC0885 datasheet, SM1603E3/TR13 clamps to 9 V at 5 A (8/20 µs pulse), versus 7 V at 1 A. This progressive voltage rise reflects silicon diode physics - higher current increases forward drop. Designers must verify that 9 V remains below the absolute maximum rating of downstream ICs, especially for short-duration but high-current EFT bursts.
Does SM1603E3/TR13 meet IEC 61000-4-2 and IEC 61000-4-4 standards, and what test levels does it support?
Yes, SM1603E3/TR13 is specified to protect against ESD per IEC 61000-4-2 (±15 kV contact, ±20 kV air) and EFT per IEC 61000-4-4 (40 A, 5/50 ns). Its 300 W peak power rating and sub-7 V clamping at 1 A enable compliance in Level 4 system-level testing when properly laid out with low-inductance grounding - a key requirement validated in the SM1603E3/TR13 application notes.
What is the capacitance of SM1603E3/TR13, and how does it impact high-speed signal lines?
SM1603E3/TR13 exhibits 850 pF capacitance per line at 0 V and 1 MHz. This value is suitable for low-to-medium speed interfaces (e.g., I²C, RS-232, GPIO) but may distort edges on >10 Mbps signals like USB 2.0 or Ethernet MDI. For such cases, lower-capacitance alternatives like SP1003-030 (30 pF) should be evaluated - confirming SM1603E3/TR13's role in cost-optimized, noise-tolerant designs rather than high-frequency applications.
SM1603E3/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):
- 3.3V
- Voltage - Breakdown (Min):
- 4V
- Voltage - Clamping (Max) @ Ipp:
- 9V
- Current - Peak Pulse (10/1000µs):
- 5A (8/20µs)
- Power - Peak Pulse:
- 300W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 850pF @ 1MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SO
SM1603E3/TR13 FAQ
1.How can I place an order for SM1603E3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SM1603E3/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 SM1603E3/TR13 reliable?
The price and inventory of SM1603E3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM1603E3/TR13 is usually 5 days.
3.What payment methods are accepted for SM1603E3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM1603E3/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM1603E3/TR13?
SM1603E3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM1603E3/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 SM1603E3/TR13?
For technical support, including SM1603E3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM1603E3/TR13 requirements.
6.How does Aetrix verify that SM1603E3/TR13 is sourced from the original manufacturer or authorized distributors?
All SM1603E3/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 SM1603E3/TR13 meets industry standards.
7.What is the process for return or replacement of SM1603E3/TR13?
All SM1603E3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SM1603E3/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 SM1603E3/TR13 part is unused and in its original packaging.
Return procedure for SM1603E3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM1603E3/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
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
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D5V0L1B2WS-7
Diodes Incorporated
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