august 2008 rev 2 1/8 8 dsl01-xxxsc5 secondary protection for dsl lines features low capacitance devices: ? dsl01-xxxsc5: delta c typ = 3.5 pf high surge capability: 30 a - 8/20 s voltage: 8 v, 10.5 v, 16 v, and 24 v rohs package benefits transil? mode will clamp esd and low energy surges without disturbing line drivers during transmission while high energy surges will be short circuited to avoid line driver damage. the low capacitance makes it suitable for adsl2+ and vdsl signals complies with the following standards iec 61000-4-2, level 4 ? 15 kv (air discharge) ? 8 kv (contact discharge mil std 883g-method 3015-7: class 3 ? 25 kv (human body model) iec 61000-4-5, level 2: 24 a, 8/20 s applications secondary protection to be located after the transformer of adsl and vdsl modem either on central office or subscriber side. replaces crowbar protection located on primary side. tm: transil is a trademark of stmicroelectronics figure 1. functional diagram description this device combines a transil used for low energy surges and a trisil for high energy surges. this combination provides a surge / capacitance trade-off compatible with high debit rates such as adsl2+ and vdsl. the combination on the same die makes it compatible with sot23-5l package. 1 2 3 4 5 sot23-5l (sc-59) 1 - 5 3 - 4 pin 2: not to be connected www.st.com
characteristics dsl01-xxxsc5 2/8 1 characteristics figure 2. pulse waveform table 1. absolute maximum ratings (t amb = 25 c) symbol parameter value unit i pp peak pulse current (1) t r = 8 s, t p = 20 s 30 a t r = 10 s, t p = 1000 s 18 a t stg t j storage temperature range operating junction temperature range -55 to 150 -40 to 125 c c t l maximum temperature for soldering during 10 s 260 c 1. for pulse waveform see figure 2 . 100 50 %i pp t r t p 0 t repetitive peak pulse current tr = rise time (s) tp = pulse duration time (s) table 2. electrical characteristics (t amb = 25 c) type i rm @ v rm v br @ i br v br @ i br v bo i h c c max. a v min. v ma typ. v ma max. v typ. ma max. pf (1) typ. pf (2) dsl01-008sc5 0.5 8 9.5 1 11 10 20 100 20 3.5 dsl01-010sc5 0.5 10.5 11 1 12 10 25 100 17 3.5 dsl01-016sc5 0.5 16 18 1 20 10 40 100 15 3.5 dsl01-024sc5 0.5 24 25 1 28 10 45 100 12 3.5 1. test conditions : v r = 2 v bias, v rms = 1 v, f = 1 mhz 2. measured between 1 v and v rm figure 3. variation of leakage current versus reverse voltage applied (typical values) figure 4. variation of junction capacitance versus reverse voltage applied (typical values) 1.e+00 1.e+01 1.e+02 1.e+03 25 50 75 100 125 i r (na) v r =v rm t j (c) 0.0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 10.0 11.0 12.0 13.0 14.0 15.0 12345678910111213141516 v r (v) c (pf) f=1mhz v osc =1v rms t j =25c dsl01-008sc5 dsl01-016sc5
dsl01-xxxsc5 application information 3/8 2 application information the dsl01 series has been designed to be implemented after the transformer of a dsl system to comply with world wide standards such as itu-t k20/21 and telecordia gr-1089 without using crowbar protection such as trisils or gas tube before the transformer. the planar technology used for the dsl01 provides an excellent trade-off between capacitance and surge capability: typically 12 pf for the dsl01-008, providing compliance with telecordia gr-1089 (500a 2/10s). but, the key point is the low variation of the capacitance versus xdsl signal. this is designed to eliminate limitations in signal performance. figure 5. shows the schematic used for a complete protection (differential and common mode) but in some cases depending on the line driver circuitry only differential or common can be used. figure 5. differential and common mode protection the topology shown in figure 6. is for differential protection of line drivers and capacitances. figure 6. differential protection of the line drivers tip ring dsl01 dsl01 dsl01 tcp1.25a tip ring dsl01 dsl01 tcp1.25a tip ring dsl01 dsl01 tcp1.25a
application information dsl01-xxxsc5 4/8 the toplogy shown in figure 7. is for protection connected to the output winding of the transformer. figure 7. protection connected to the output winding of the transformer figure 8. recommended layout concerning figure 8 : pins 1 and 5 must be connected together. pins 3 and 4 must be connected together. pin 2 must not be connected tip ring dsl01 tcp1.25a dsl01 tip ring dsl01 tcp1.25a dsl01 1 4 2 3 5 pcb tracks 1 4 2 3 5 pcb tracks
dsl01-xxxsc5 ordering information scheme 5/8 3 ordering information scheme figure 9. ordering information scheme dsl 01 - xxx sc5 dsl line protection version stand -off voltage 008 = 8v 010 = 10.5 v 016 = 16v 024 = 24v package sc5 = sot23-5l
package information dsl01-xxxsc5 6/8 4 package information epoxy meets ul 94, v0 in order to meet environmental requirements, st offers these devices in ecopack ? packages. these packages have a lead-free second level interconnect. the category of second level interconnect is marked on the inner box label, in compliance with jedec standard jesd97. the maximum ratings related to soldering conditions are also marked on the inner box label. ecopack is an st trademark. ecopack specifications are available at www.st.com . table 3. sot23-5l dimensions ref. dimensions millimeters inches min. typ. max. min. typ. max. a 0.90 1.45 0.035 0.057 a1 0 0.10 0 0.004 a2 0.90 1.30 0.035 0.051 b 0.35 0.50 0.014 0.020 c 0.09 0.20 0.004 0.008 d 2.80 3.00 0.11 0.118 e 1.50 1.75 0.059 0.069 e 0.95 0.037 h 2.60 3.00 0.102 0.118 l 0.10 0.60 0.004 0.024 m 0 10 0 10 figure 10. footprint (dimensions in mm) figure 11. marking a2 a l h c b e d e e a1 0.95 0.60 1.20 1.10 3.50 2.30 1 4 3 5 1 4 3 5 x x xx
dsl01-xxxsc5 ordering information 7/8 5 ordering information 6 revision history table 4. ordering information order code marking package weight base qty delivery mode dsl01-008sc5 xt08 sot23-5l 16 mg 3000 tape and reel dsl01-010sc5 xt12 sot23-5l 16 mg 3000 tape and reel dsl01-016sc5 wt16 sot23-5l 16 mg 3000 tape and reel dsl01-024sc5 wt24 sot23-5l 16 mg 3000 tape and reel table 5. document revision history date revision changes 15-nov-2006 1 initial release. 26-aug-2008 2 added ul 94 and ecopack statements. updated figure 3 from relative to absolute typical values. added part numbers dsl01-010sc5 and dsl01-024sc5.
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