SDC36B SEMTECH | Alldatasheet
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1 www.semtech.com PROTECTION PRODUCTS SDC36B TVS Diode Array for Proximity Switch Input Protection Description Features Circuit Diagram Schematic & PIN Configuration Revision 02/01/07 The SDC36B is a high-surge transient voltage suppres- sor (TVS) optimized for protection of sensitive digital sensors used in proximity switches and industrial control applications. The SDC36B protects the compo- nents from over-voltages caused by electrostatic discharge (ESD), electrical fast transients (EFT), and tertiary lightning. The unique design of the SDC36B incorporates two TVS diodes in a compact SOT23 package for applica- tions where board space is at a premium. The single package provides protection for the I/O line and power supply rail with high surge capabilities (2 Amps at t p=1.2/50us) and an exceptionally low clamping volt- age of <47V. The SDC36B replaces up to two large discrete diodes providing the designer an easy to implement integrated solution. The features of the SDC36B are ideal for protection of two, three, and four wire DC high-side proximity switches.
Applications
Mechanical Characteristics Two, Three, and Four Wire DC High-Side Proximity Switches Digital Sensor Input Protection Industrial Controls 24V - 33V DC Supply Protection 350 watts peak pulse power (t p = 8/20μs) Transient protection for data and power lines to IEC 61000-4-2 (ESD) ±15kV (air), ±8kV (contact) IEC 61000-4-4 (EFT) 40A (5/50ns) IEC 61000-4-5 (Lightning) 2A (1.2/50 μs) Replaces two discrete devices Low clamping voltage Low leakage current High surge capability Solid-state silicon avalanche technology JEDEC SOT23 package RoHS/WEEE Compliant Molding compound flammability rating: UL 94V-0 Marking : D36B Packaging : Tape and Reel per EIA 481 SOT23 (Top View)
2© 2007 Semtech Corp. www.semtech.com PROTECTION PRODUCTS SDC36B Absolute Maximum Rating Electrical Characteristics (T=25 oC) B63CDS retemaraPl obmySs noitidnoCm uminiMl acipyTm umixaMs tinU egatloVffO-dnatSesreveRV MWR 1ot2niPro1ot3niP3 3V egatloVnwodkaerBesreveRV RB It Am1=5 3V tnerruCegakaeLesreveRI R V MWR C°52=T,V33=5 A μ tnerruCegakaeLesreveRI )TOH(R V MWR C°58=T,V33=5 2A μ egatloVdrawroFV F IF Am001=3 .1V egatloVgnipmalCV C I PP ,A2= sμ05/2.1=pt 74V ecnaticapaCnoitcnuJC j VR zHM1=f,V0=0 5F p gnitaRl obmySe ulaVs tinU t(rewoPesluPkaeP p )sμ02/8=P kp 053s ttaW t(rewoPesluPkaeP p )sμ05/2.1=P kp 522s ttaW tnerruCesluPkaePt ( p )sμ05/2.1=I PP 4A (tnerruCdrawroFkaePevititepeR-noNt p )sμ001=I XAMSF 4A erutarepmeTgnitarepOT J 521+ot55-C ° erutarepmeTegarotST GTS 051+ot55-C °
3© 2007 Semtech Corp. www.semtech.com PROTECTION PRODUCTSPROTECTION PRODUCTS SDC36B Typical Characteristics Non-Repetitive Peak Pulse Power vs. Pulse Time 100 110 0 25 50 75 100 125 150 Ambient Temperature - T A (oC) % of Rated Power or IPP Power Derating Curve Pulse Waveform Clamping Voltage vs. Peak Pulse Current 100 110 0 5 10 15 20 25 30 Time (µs) Percent of IPP e td = IPP/2 Waveform Parameters: tr = 8µs td = 20µs Forward Voltage vs. Forward Current 0.5 1.5 2.5 0123456789 1 0 1 1 1 2 Forward Current - IF (A) Forward Voltage - VF (V) Waveform Parameters: tr = 8µs td = 20µs 0.01 0.1 0.1 1 10 100 1000 Pulse Duration - tp (µs) Peak Pulse Power - Ppk (kW) 40.00 42.00 44.00 46.00 48.00 50.00 52.00 54.00 56.00 58.00 60.00 012345 Peak Pulse Current (A) Clamping Voltage (V) Waveform Parameters: tr = 1.2μs td = 50μs
4© 2007 Semtech Corp. www.semtech.com PROTECTION PRODUCTS SDC36B Device Connection for Protection of Two, Three, and Four Wire Proximity Switches Digital sensors help to bridge the gap between the physical world and the digital world in applications such as computer controlled factory automation. In such environments, transient voltages can easily disrupt or damage sensitive sensor inputs. The SDC36B provides transient voltage protection for the digital sensors to ensure their operation is not disrupted by the physical world. The SDC36B is designed to meet the high surge capability and low clamping voltage needed to protect the ASIC and control logic used in proximity switches. The SDC36B provides protection for the power and I/O lines. Typical configurations for the protection of two, three, and four wire switches are as follows: 1. Two-Wire Switch: Connect pin 1 to the I/O line and pin 2 to the DC supply (since the device is symmetrical, these connections can be reversed). Pin 3 is not connected. 2. Three-Wire Switch: Either pin 1 or pin 2 is con- nected to the I/O line with the other connected to ground. Pin 3 must be connected to the DC supply. 3. Four-Wire Switch: Two device are required to protect four wire switches. Pin 3 of each device is connected to the DC supply line. Pins 1 and 2 are connected to the I/O lines and ground as shown Matte Tin Lead Finish Matte tin has become the industry standard lead-free replacement for SnPb lead finishes. A matte tin finish is composed of 100% tin solder with large grains. Since the solder volume on the leads is small com- pared to the solder paste volume that is placed on the land pattern of the PCB, the reflow profile will be determined by the requirements of the solder paste. Therefore, these devices are compatible with both lead-free and SnPb assembly techniques. In addition, unlike other lead-free compositions, matte tin does not have any added alloys that can cause degradation of the solder joint. Applications Information 2-Wire DC Proximity Switch Application SDC36B 3-Wire DC Proximity Switch Application SDC36B 4-Wire DC Proximity Switch Application SDC36B SDC36B
5© 2007 Semtech Corp. www.semtech.com PROTECTION PRODUCTSPROTECTION PRODUCTS SDC36B Outline Drawing - SOT23 Land Pattern - SOT23 e D E1 E bxN A2A 3X A bbb C A B B C SEATING PLANE aaa C 1.401.20 N3 3 0 - 8°0°8°0° - .055.047 bbb .008 0.20 aaa .004 0.10 INCHES .114 E D b e c .012 .003 .082 DIM A MIN .000 .035 0.51 0.18 2.64 0.30 0.08 2.10 .022 .075 .093 .020 .007 .104 (0.55)
1.90 BSC
2.37 2.90 MILLIMETERS MAX 0.10 1.12 MIN DIMENSIONS 0.01 MAXNOM - .004 .044 NOM 0.89 3.042.80.110 .120 e1 .037 0.95 BSC E1 .051 1.30 SEE DETAIL ASIDE VIEW DATUMS AND TO BE DETERMINED AT DATUM PLANE-A- -B-2. CONTROLLING DIMENSIONS ARE IN MILLIMETERS (ANGLES IN DEGREES). NOTES: OR GATE BURRS. DIMENSIONS "E1" AND "D" DO NOT INCLUDE MOLD FLASH, PROTRUSIONS3. -H- H DETAIL A 0.25C SEATING PLANE GAUGE PLANE 0 c L REFERENCE IPC-SM-782A.2. E .037 0.95 Y Y GZ C E X E1 .075 1.90 NOTES: 1. THIS LAND PATTERN IS FOR REFERENCE PURPOSES ONLY CONSULT YOUR MANUFACTURING GROUP TO ENSURE YOUR COMPANY'S MANUFACTURING GUIDELINES ARE MET. DIM Y Z G X C MILLIMETERSINCHES (2.20) .055 .141 .039 .031 (.087) 1.40 3.60 1.00 0.80 DIMENSIONS
6© 2007 Semtech Corp. www.semtech.com PROTECTION PRODUCTS SDC36B Contact Information Semtech Corporation Protection Products Division 200 Flynn Rd., Camarillo, CA 93012 Phone: (805)498-2111 FAX (805)498-3804
Ordering Information
TCT.B63CDSe erFbP0 00,3h cnI7 Marking Code D36B