- TransClamp Description The TClamp 1272S provides dedicated line driver side srge and ESD protection for ADSL and VDSL applications. It is designed to replace mltiple discrete components in portable applications. They featre high srge crrent capability of 2A (tp=8/2s) and low clamping voltage making them ideal for se on the IC side of a copling transformer. The TClamp1272S integrates low capacitance, srgerated compensation diodes with high power transient voltage sppressors (TVS). The capacitance is limited to 5pF maximm to ensre correct signal transmission on high-speed lines. Two internal bias diodes are provided for the TVS diode. The TClamp1272S is in a 6-pin, RoHS/WEEE compliant, SOT-23 package. The leads are fi nished with lead-free matte tin. The fl ow- throgh package design simplifi es PCB layot. TClamp1272S Low Capacitance TClamp Srge Protection for xdsl Interfaces Featres Transient protection for high-speed data lines to IEC 61-4-2 (ESD) 3kV (air), 3kV (contact) IEC 61-4-4 (EFT) 4A (5/5ns) IEC 61-4-5 (Lightning) 25A (8/2µs) Array of srge rated diodes with internal TVS Diode Bias diodes prevent charging and discharging of TVS capacitance Low capacitance: (<5pF) Operating voltage: 12V Low leakage crrent Solid-state silicon-avalanche technology Line Driver Side protection of ADSL and VDSL inter- faces Modems and Gateways Access Eqipment Central Offi ce Eqipment Cstomer Premise Eqipment Mechanical Characteristics JEDEC SOT-23 6L package Pb-Free, Halogen Free, RoHS/WEEE Compliant Molding compond fl ammability rating: UL 94V- Marking : Marking code + date code Packaging : Tape and Reel Applications Circit Diagram Pin Configration % 4/26/213 1
Absolte Maximm Ratings Rating Symbol Vale Units Peak Plse Power (tp = 8/2µs) P pk 6 Watts Peak Plse Crrent (tp = 8/2µs) I PP 2 A ESD per IEC 61-4-2 (Air) 3 V ESD ESD per IEC 61-4-2 (Contact) 3 kv Operating Temperatre T J -4 to +85 C Storage Temperatre T STG -55 to +15 C Electrical Characteristics (T=25 O C nless otherwise specified) Parameter Symbol Conditions Min. Typ. Max. Units Reverse Stand-Off Voltage V RWM T = -4 to +85 O C 12 V Reverse Breakdown Voltage V BR I BR = 1mA 13.5 15 17 V Reverse Leakage Crrent I R V RWM = 12V, T = 25 O C.1 µa V RWM = 12V, T = 85 O C.3 Clamping Voltage V C I PP = 5A, t P = 8/2µs 2 V I PP = 2A, t P = 8/2µs 3 V Peak Plse Crrent I PP t P = 8/2µs 2 A Jnction Capacitance C J Between any I/O pin and Grond; T = -4 to +85 O C Bias+ to GND = 6V; Bias- to GND = -6V; VR = V; f = 1MHz 5 pf 213 Semtech Corporation. 2
Typical Characteristics Non-Repetitive Peak Plse Power vs. Plse Time 1 12 Power Derating Crve Peak Plse Power - P PP (kw) 1.1 % of Rated Power or I PP 1 8 6 4 2 DR4512:25:125:15.1.1 1 1 1 1 Plse Dration - tp (µs) DR4412-6 25 5 75 1 125 15 Ambient Temperatre - T A ( O C) 4 Capacitance vs. Temperatre 15.5 Breakdown Voltage vs Temperatre Jnction Capacitance - C J (pf) 3 2 1 VR = 12V Any Pin. Line to GND Breakdown Voltage - V BR (V) 15. 14.5 I BR = 1mA AR_TC1272S_CJvT -5-25 25 5 75 1 Temperatre ( o C) AR_TC1272S_VBR 14. -5-25 25 5 75 1 Temperatre ( o C) 1. Leakage Crrent vs Temperatre 3 TLP Characteristic 7.5 TV A 25 O R = 12VC 25 Typical TLP Reslts Any Pin to any other Pin Either Direction Leakage Crrent - IR (na) 5. 2.5 TLP Crrent (A) 2 15 1 5 AR_TC1272S_IRvT. -5-25 25 5 75 1 Temperatre ( o C) AR_TC1272S_TLP 5 1 15 2 25 3 Clamping Voltage - V C (V) 213 Semtech Corporation. 3
Typical Characteristics (Contined) ESD Clamping (+8kV Contact per IEC 61-4-2) 15 5 Typical Insertion Loss S21 Clamping Voltage - V C (V) 1 5 Insertion Loss - IL (db) -5-1 -15 AR_TC1272S_IL AR_TC1272S_P8KV_1-3 -5-2 2 4 6 8 1 Time (ns) -2.1.1 1 1 1 1 1 Freqency (MHz) 213 Semtech Corporation. 4
Applications Information Device Connection for Metallic Protection of High- Speed Data Lines The TClamp1272S is designed to protect high-speed data lines from transient over-voltages which reslt from lightning and ESD. The device is designed to protect one line in common mode (Line-to-Grond) or one line pair in metallic (Line-to-Line) mode. The part is designed to allow straight-throgh connection, see the Wiring Diagram opposite. Line 1A is connected at pin1 and its trace can contine nder the part and connect to pin6, which is not connected internally to the part. A similar connection can be made for Line 1B. For metallic mode protection, the two lines are connected to pin1 and pin3. For common mode protection, connect the line to pin1 and grond pin3 (or vice-versa). The grond connection shold be made directly to the grond plane for best reslts. Bias voltage may be applied at pins 2 and 5 with either polarity. % Pin Configration (Top Side View) Wiring Diagram % & 213 Semtech Corporation. 5
Otline Drawing - SOT-23-6L -. %& % %%' % &% %!! ( &, &'& %&'%%' ' % &'%%( %&))))&&%&*(+'&'& &' '' Land Pattern - SOT-23-6L / % / %& %%'! &, &'& %&'%%' ' ('*&''*''&&/ &/&'%*' '&&'/&' &%/1%*' '% 213 Semtech Corporation. 6
Marking Ordering Information Part Nmber Lead Finish Qty per Reel Reel Size TClamp1272S.TCT Matte Tin 3 7 Notes: YW = Alphanmeric character Date Code TransClamp and TClamp are registered trademarks of Semtech Corporation. Tape and Reel Specification 2!! Tape Width 8 1.55 ±.5 D D1 E F K (Max) P P P2 T (Max) mm mm mm mm mm mm mm mm mm mm 1. ±.25 1.75 ±.1 3.5 ±.5 2.4 4. ±.1 4. ±.1 2. ±.5 W.4 8. +.3.1 Contact Information Contact Information Semtech Corporation Protection Prodcts Division 2 Flynn Rd., Camarillo, CA 9312 Phone: (85)498-2111 FAX (85)498-384 213 Semtech Corporation. 7