LC01-6. Low Capacitance TVS for High-Speed Telecommunication Systems. PROTECTION PRODUCTS Description. Features. Applications

Transcription

1 escription The transient voltage suppressor is designed to protect components which are connected to high speed telecommunication lines from voltage surges caused by lightning, electrostatic discharge (ES), and electrical fast transients (EFT). TS diodes are ideal for use as board level protection of sensitive semiconductor components. The is designed for metallic mode, secondary line side protection in digital line card applications. It features solid-state silicon-avalanche technology for unmatched transient protection without device degradation. The combines TS diodes with low capacitance compensation diodes to provide an integrated, low capacitance protection solution. Additional features include sub-nanosecond response time, a low operating voltage of 6 volts, and low clamping voltage. The is suitable for use on T1/E1 and xsl interfaces in equipment such as base stations, routers, and channel service units. The meets the longhaul (outer-building) transient immunity requirements of Bellcore 89, FCC Part 68 (Type A and B surges), ITU K.2 and K.21, and IEC Circuit iagram Low Capacitance TS for High-Speed Telecommunication Systems Features 15 watts peak pulse power (t p = /µs) Transient protection for high speed data lines to IEC (ES), ±15k (air), ±8k (contact) IEC (EFT), 4A (5/5ns) IEC (Lightning), 95A (8/2µs) Bellcore 89 (Outer-Building), A (/µs), 5A (2/µs) FCC Part 68, 2A (/16µs) ITU K.21, A (5/3µs) ITU K.2, 2A (5/3µs) ifferential protection for one Tip and Ring line pair Low capacitance for high speed interfaces Low operating and clamping voltage Integrated structure saves board space and increases reliability Solid-state silicon-avalanche technology Mechanical Characteristics JEEC SO-16W package UL 497B listed Molding compound flammability rating: UL 94- Marking : Part number, date code, logo Packaging : Tube or Tape and Reel per EIA 481 Applications T1/E1 Line Cards Base Stations WAN Interfaces xsl Interfaces CSU/SU Equipment Schematic & PIN Configuration SO-16W (Top iew) Revision 12/9/4 1

2 Absolute Maximum Rating Rating Symbol alue Units Peak Peak Peak Thermal Thermal Pulse Power (tp = /µs) Pulse Current (tp = /µs) Pulse Current (tp = /16µs) Resistance Junction to Case Resistance Junction to Ambient P pk 5 1 Watts 1 A 2 A θ JC 3 C/ W θ JA 95 C/ W Lead Soldering Temperature T L 26 ( sec. ) C Operating Temperature T J -55 to +125 C Storage Temperature T STG 55 to C Electrical Characteristics Parameter Symbol Conditions Minimum Typical Maximum Units Reverse Stand-Off oltage RWM 6 Reverse Breakdown oltage R B I t = 1mA 8 Reverse Leakage Current I R RWM = 6, T=25 C 25 µ A Clamping oltage C = A tp = /µs Clamping oltage C = 2A tp = /16µs Temperature Coefficient of Breakdown oltage αt BR 3 m/ C Junction Capacitance C j R =, f = 1MHz 5 pf 24 Semtech Corp. 2

3 Typical Characteristics Non-Repetitive Peak Pulse Power vs. Pulse Time Power erating Curve Peak Pulse Power - Ppk (kw) Pulse uration - t p (µs) % of Rated Power or Ambient Temperature - T A ( o C) Pulse Waveform Clamping oltage vs. Peak Pulse Current Percent of IPP e -t td = /2 Waveform Parameters: tr = µs td = µs Clamping oltage - C () Waveform Parameters: tr = µs td = µs Time (µs) Peak Pulse Current - (A) Capacitance vs. Reverse oltage AC Power issipation Capacitance - Cj (pf) Pins 1-8 tied together Pins 9-16 tied together f = 1MHz Power (w) Reverse oltage - R () 1 Time (s) 24 Semtech Corp. 3

4 Applications Information evice Connection Options for Protection of High- Speed ata Lines The is designed to protect high-speed data lines from transient over-voltages which result from lightning and ES. The device is designed to protect one line pair in differential (Line-to-Line) mode. Pins 1-8 are connected to line 1 and pins 9-16 are connected to line 2 as shown. All pins should be connected for best results. T1/E1 Linecard Protection A typical long-haul T1/E1 linecard protection circuit is shown below. The is connected between Tip and Ring on the transmit and receive line pairs. It provides protection to metallic (line-to-line) lightning surges per Bellcore 89 and FCC Part 68. epending on the application, a high voltage crowbar device (not shown) such as a gas discharge tube (GT) or TS Thyristor may be used to suppress common mode (lineto-ground) surges. To complete the protection circuit, the SRA5-4 (or SRA3.3-4 for 3.3 supplies) is employed as the secondary IC side protection element. This device helps prevent the transceiver from latching up by providing fine clamping of transients that are coupled through the transformer. Positive temperature coefficient (PTC) resistors or fuses are also required for AC power cross protection. For further information, reference Semtech application note AN97-. Figure 1 - Schematic and Pin Configuration Figure 2 - Connection for ifferential Protection (Line-to-Line) 24 Semtech Corp. 4

5 Typical Applications T1/E1 Line Card Protection (Long-Haul Applications) SSL Protection 24 Semtech Corp. 5

6 Outline rawing - SO-16W R E/2 ccc C N A e/2 B e E1 E IMENSIONS INCHES MILLIMETERS IM MIN NOM MAX MIN NOM MAX A A A b c E E.45.3 BSC e.5 BSC 1.27 BSC h (.2) (.51) J (.25) (.63) L L1 (.55) (1.4) N R (.3) (.76) aaa.4. bbb..25 ccc aaa C SEATING PLANE C bxn bbb A1 C A-B h x 45 A2 A GAGE PLANE H c.25 L 1 SIE IEW J SEE ETAIL A (L1) ETAIL A NOTES: 1. CONTROLLING IMENSIONS ARE IN MILLIMETERS (ANGLES IN EGREES). 2. ATUMS -A- AN -B- TO BE ETERMINE AT ATUM PLANE -H- 3. IMENSIONS "E1" AN "" O NOT INCLUE MOL FLASH, PROTRUSIONS OR GATE BURRS. 4. REFERENCE JEEC ST MS-13, ARIATION AA. Land Pattern - SO-16W Z C G Y IMENSIONS IM INCHES MILLIMETERS C (.362) (9.2) E G X Y Z E X 24 Semtech Corp. 6

7 Marking SC YYWW PHIL Note: (1) yyww = ate Code Ordering Information Part Number Working oltage Qty/Pkg Reel Size.T 6 /Ree l 13 Inch 1) L C1-6.TT ( 6 /Ree l 13 Inch 6 46/Tub e N/ A 1) L C1-6.T ( 6 46/Tub e N/ A Note: (1) Lead-Free Product Contact Information Semtech Corporation Protection Products ivision 2 Flynn Rd., Camarillo, CA 9312 Phone: (85) FAX (85) Semtech Corp. 7