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2-7 features ? 2 x high power, high voltage, thick ?lm surge protection resistors ? 2 x high accuracy, high stability matched battery feed resistors ? 2 replaceable 2ag fuses in surface-mounted fuse clips ? used with the mh89626c for a complete ops line interface applications ? battery feed and secondary protection for off- premise slics description the MH80626C hybrid sip provides a protection circuit consisting of two 2ag size fuses in surface- mounted fuse clips and two high voltage, high power 5.5 w surge resistors. the MH80626C also provides two high stability, high power 50 w feed resistor matched to 0.1%. the sip provides full secondary protection for the mh89626c off-premise slic, allowing conformance to the requirements of various international safety and performance standards. figure 1 - functional block diagram f1 f2 r1 r2 tin rin r3 r4 r5 tcom tf t rf2 rf1 r rf rcom issue 2 april 1995 ordering information MH80626C 20 pin sil package 0 c to 70 c MH80626C battery feed/protection sip preliminary information
2-8 MH80626C preliminary information figure 2 - pin connections pin description pin # name description 1 tin tip input. connects to tip conductor of the subscriber loop. 2nc no connection: there is no pin in this location 3ic internal connection : do no connect to this pin. 4nc no connection: there is no pin in this location. 5 tcom tip common: connects to tip pin of the slic via a normally closed ringing relay. see figure 1. 6t tip connection: connects to tip pin of the slic. 7r ring connection: connect to the ring pin of the slic. 8 rcom ring common: connects to ring pin of the slic via a normally closed ringing relay. see figure 1. 9nc no connection: there is no pin in this location. 10 ic internal connection: do not connect to this pin . 11 nc no connection: there is no pin in this location. 12 rf ring feed connection: connects to the rf pin of the slic. 13 nc no connection: there is no pin in this location. 14 tf tip feed connection: connect to the tf pin of the slic. 15 nc no connection: there is no pin in this location. 16 rf1 ring feed 1. ringing input: connects to ringing supply. 17 nc no connection: there is no pin in this location. 18 rf2 ring feed 2. ringing output: connects to ring line through the ring relay contact. 19 nc no connection: there is no pin in this location. 20 rin ring input: connects to ring conductor of the subscriber loop. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 tin nc ic nc tcom t r rcom nc ic nc rf nc tf nc rf1 nc rf2 nc rin
2-9 preliminary information MH80626C electrical characteristics 0?c to 70?c * typical ?gures are at 25?c and are for design aid only note 1: refer to the appropriate telecom equipment safety speci?cations for full details of the test and requirements characteristics symbol min typ* max units test conditions 1 resistance - absolute r1 4.5 5.5 6 w 2 resistance - absolute r2 4.5 5.5 6 w 3 resistance - match 1 % match between r1 & r2 4 resistance - absolute r3 49.75 50 50.25 w 5 resistance - absolute r4 49.75 50 50.25 w 6 resistance - match 0.1 % match between r3 & r4 7 resistance - absolute r5 555 560 565 w 8 fuse f1 0.25 amps 250 vac slow blow 9 fuse f2 0.25 amps 250 vac slow blow reference speci?cation test description performance comments 1 ccitt k.20 lightning surge simulation 1kv 10 x 700 m sec no damage no arching, fuse intact see note 1 2 ccitt k.20 power induction 300 vrms 200 msec no damage no arching, fuse intact see note 1 3 ccitt k.20 power cross 220 vrms 15 min no damage no arching, fuse blows see note 1
2-10 MH80626C preliminary information figure 3 - mechanical data 2.0 ?? + 0.020 (50.8 + 0.5) 0.7 + 0.020 (17.8 + 0.5) 0.05 + 0.01 (1.3 + 0.5) *** 0.05 + 0.02 (1.225 + 0.05) 0.020 + 0.005 (0.51 + 0.13) 0.100 + 0.010 (2.54 + 0.26) 0.18 + 0.02 (4.6 + 0.5) fuse area fuse area 1 23 4 5 6 0.34 max 0.01 min (0.25) 1 20 notes: 1) not to scale 2) dimensions in inches). 3) (dimensions in millimetres). *dimensions to centre of pin & tolerance non accumulative.
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