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| 1 www.semtech.com rclamp ? 3354s low voltage rclamp ? surge protection for gbe interfaces protection products - railclamp ? 1/24/2013 railclamp ? tvs diodes are speci? cally designed to protect sensitive components which are connected to high-speed data and transmission lines from overvoltage caused by esd (electrostatic discharge), cde (cable discharge events), and eft (electrical fast transients). the rclamp ? 3354s incorporates surge rated, low capacitance steering diodes and a tvs diode in a single package. each device will protect up to four high-speed lines. the RCLAMP3354S can withstand a high level of surge current (25a, 8/20us) while maintaining a low loading capacitance of less than 5pf. the high surge capability means it can be used in high threat environ- ments in applications such as gigabit ethernet, telecom- munication lines, and lvds interfaces. the RCLAMP3354S is constructed using semtechs pro- prietary epd process technology. the epd process pro- vides low stand-off voltages with signi? cant reductions in leakage current and capacitance over silicon-avalanche diode processes. it features a low operating voltage of 3.3 volts for superior protection. the RCLAMP3354S is in a 5-lead sot-23 package. the leads are ? nished with lead-free matte tin. transient protection for high-speed data lines to u iec 61000-4-2 (esd) 30kv (air), 30kv (contact) iec 61000-4-4 (eft) 40a (5/50ns) iec 61000-4-5 (lightning) 25a (8/20s) array of surge rated diodes with internal tvs diode u protects up to four i/o lines u low capacitance (<5pf) for high-speed interfaces u low dynamic resistance: 0.25 ohms u low operating voltage: 3.3v u solid-state silicon-avalanche technology u description circuit diagram features applications pin con? guration jedec sot-23 5l package u pb-free, halogen free, rohs/weee compliant u molding compound ? ammability rating: ul 94v-0 u marking : marking code + date code u packaging : tape and reel u 10/100/1000 ethernet u central of? ce equipment u lvds interfaces u magjacks / integrated magnetics u notebooks / desktops / servers u mechanical characteristics # % ) * $
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2 ? 2013 semtech corporation. www.semtech.com RCLAMP3354S protection products absolute maximum ratings electrical characteristics (t=25 o c unless otherwise speci? ed) parameter symbol conditions min. typ. max. units reverse stand-off voltage v rwm 3.3 v punch-through voltage v pt i pt = 2a 3.5 5.3 v snap-back voltage v sb i sb = 50ma 2.8 v reverse leakage current i r v rwm = 3.3v, t=25c 0.5 a clamping voltage v c i pp = 1a, tp = 8/20s any i/o to ground 5.5 v i pp = 10a, tp = 8/20s any i/o to ground 10 i pp = 25a, tp = 8/20s any i/o to ground 16 junction capacitance c j between i/o pins and ground v r = 0v, f = 1mhz 3.8 5 pf between i/o pins v r = 0v, f = 1mhz 2.0 rating symbol value units peak pulse power (tp = 8/20s) p pk 400 w peak pulse current (tp = 8/20s) i pp 25 a esd per iec 61000-4-2 (air) v esd 30 kv esd per iec 61000-4-2 (contact) 30 operating temperature t j -55 to +85 o c storage temperature t stg -55 to +150 o c 3 ? 2013. semtech corporation. www.semtech.com RCLAMP3354S protection products typical characteristics non-repetitive peak pulse power vs.pulse time power derating curve positive tlp characteristic 0 5 10 15 20 25 30 0 2 4 6 8 10 tlp current - i dut (a) clamping voltage - v c (v) t a = 25 o c tlp parameters tp = 100ns; tr = 200ps pins 1, 3, 4 or 5 to gnd ar_rc3354s_tlp + r dyn = 0.19? best fit 4a to 16a 0.01 0.1 1 10 0.1 1 10 100 1000 peak pulse power - p pp (kw) pulse duration - tp (s) dr040412-400 t a = 25 o c 0 20 40 60 80 100 120 0 25 50 75 100 125 150 % of rated power or i pp ambient temperature - t a ( o c) dr040512:25:125:150 -30 -25 -20 -15 -10 -5 0 -12 -10 -8 -6 -4 -2 0 tlp current - i dut (a) clamping voltage - v c (v) t a = 25 o c tlp parameters tp = 100ns; tr = 200ps pins 1, 3, 4 or 5 to gnd ar_rc3354s_tlp- r dyn = 0.34? best fit 4a to 16a negative tlp characteristic -50 0 50 100 150 200 -20 0 20 40 60 80 100 voltage (v) time (ns) ar_rc3354s_esd +8kv t a = 25 o c +8kv esd pulse per iec61000-4-2 corrected for 40db attenuation. measured with 50, 40db attenuator; 50 scope input impedance esd clamping (+8kv contact per iec 61000-4-2) -200 -150 -100 -50 0 50 -20 0 20 40 60 80 100 voltage (v) time (ns) ar_rc3354s_esd -8kv t a = 25 o c -8kv esd pulse per iec61000-4-2 corrected for 40db attenuation. measured with 50, 40db attenuator; 50 scope input impedance esd clamping (-8kv contact per iec 61000-4-2) 4 ? 2013 semtech corporation. www.semtech.com RCLAMP3354S protection products typical characteristics (continued) -80 -60 -40 -20 0 1 10 100 1000 10000 crosstalk - ct (db) frequency - f (mhz) t a = 25 o c pin1 to pin5 ar_rc3354s_ct analog crosstalk -25 -20 -15 -10 -5 0 5 1 10 100 1000 10000 insertion loss - il (db) frequency - f (mhz) t a = 25 o c pin1 to gnd ar_rc3354s_il typical insertion loss s21 0.0 0.5 1.0 1.5 0 1 2 3 4 capacitance - c j (pf) reverse voltage - vr(v) t a = 25 o c f = 1 mhz ar_rc3354s_cap (ll) capacitance v reverse voltage (line to line) 0 1 2 3 4 5 0 0.5 1 1.5 2 2.5 3 3.5 capacitance - c j (pf) reverse voltage - v r (v) t a = 25 o c f = 1 mhz ar_rc3354s_cap (lg) capacitance v reverse voltage (line to gnd) 5 ? 2013. semtech corporation. www.semtech.com RCLAMP3354S protection products applications information gigabit ethernet protection solutions ethernet systems with connections external to the build- ing are subject to high-level transient threats. this type of equipment may even be required to meet the surge immunity requirements of telcordia gr-1089. reli- able protection of the ethernet transceiver requires a device that can absorb the expected transient energy, clamp the incoming surge to a safe level, and yet remain transparent to the system under normal operation. the RCLAMP3354S has been designed to meet these de- manding requirements. transient protection when designing ethernet protection, the entire system must be considered. an ethernet port includes interface magnetics in the form of transformers and common mode chokes. transformers and chokes can be discrete components, but integrated solutions that include the rj-45 connector, resistors, capacitors, and protection are also available. in either case, the transformer will provide a high level of common mode isolation to exter- nal voltages, but no protection for metallic (line-to-line) surges. during a metallic transient event, current will ? ow into one line, through the transformer and back to the source. as the current ? ows, it charges the windings of the transformer on the line side. once the surge is removed, the windings on the line side will stop charging and will transfer its stored energy to the ic side where the phy ic is located. the magnitude and duration of the surge is attenuated by the inductance of the mag- netics. the amount of attenuation will vary by vendor and con? guration of the magnetics. it is this transferred energy that must be clamped by the protection circuitry. 6 ? 2013 semtech corporation. www.semtech.com RCLAMP3354S protection products outline drawing - sot-23 5l land pattern - sot-23 5l #/$*%)2# !" # # $% && && % % ' $% ( )* +%+'% %+ '++ '$ % +$ '$ %+% $% + $ $+ ! +" %, ' ) ! " $% $ $ $+ %$ $ $ -. ) %+% $% + $ $+ ! +" / !" ) + (%+ +(+ '+ % % / %' /%'+ $'('+ +%' % '+ /%'+ %$ /0 $'('+ ' + $ %, $% / 1 $ $ $+ 1 # !" #/$*%)2##2 7 ? 2013. semtech corporation. www.semtech.com RCLAMP3354S protection products marking tape and reel speci? cation ordering information yw = alphanumeric character date code railclamp and rclamp are trademarks of semtech corporation part number lead finish qty per reel reel size RCLAMP3354S.tct matte tin 3,000 7 inch #/$*%)2-2 bc " ! :3";:3(<= , , ! - . > ! ? -1 @ .' !8"9**5!5 #/$*%)2/2 bc bc bc #6 d 1 a0 b0 k0 b (max) d d1 e f k (max) p p0 p2 t (max) w 3.23 0.05 3.17 0.05 1.37 0.05 4.2 1.5 +0.1 -0.0 1.0 0.05 1.75 0.10 3.5 0.05 2.4 4.0 0.1 4.0 0.1 2.0 0.05 0.4 8.0 +0.3 -0.1 all dimensions in mm contact information semtech corporation protection products division 200 flynn rd., camarillo, ca 93012 phone: (805)498-2111 fax (805)498-3804 |
Price & Availability of RCLAMP3354S
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