TPI Tripolar protection for ISDN interfaces Features Bidirectional triple crowbar protection Peak pulse current: I = 30 A , 10/1000 s PP SO-8 Breakdown voltage: TPI80N: 80 V TPI120N: 120 V Complies with following standards Available in SO-8 package CCITT K17-K20 Low dynamic breakover voltage: 10/700 s, 1.5 kV TPI8011N: 120 V 5/310 s, 38 A TPI12011N: 170 V VDE 0433 10/700 s, 2 kV Benefits 5/310 s, 50 A Low capacitance from lines to ground, allowing VDE 0878 high speed transmission without signal 1.2/50 s, 1.5 kV attenuation 1/20 s, 40 A Good capacitance balance between lines to IEC 61000-4-2 level 4 ensure longitudinal balance 0.5/700 s, 1.5 kV Fixed breakdown voltage in both common and 0.2/310 s, 38 A differential modes The same surge current capability in both Description common and differential modes A particular attention has been given to the Dedicated devices for ISDN interface and high internal wire bonding. The 4-point speed data telecom line protection. Equivalent to configuration ensures a reliable protection, a triple Trisil with low capacitance. eliminating overvoltages introduced by the parasitic inductances of the wiring (Ld /dt), I Figure 1. Functional diagram especially for very fast transient overvoltages Tip 1 8 Tip 2 GND 7 GND GND 3 6 GND Ring 4 5 Ring TM: Trisil is a trademark of STMicroelectronics November 2007 Rev 5 1/9 www.st.com 9Characteristics TPI 1 Characteristics Table 1. Absolute ratings (T = 25 C) amb Symbol Parameter Value Unit 10/1000 s 30 (1) I Peak pulse current (see note ) 5/310 s 40 A PP 2/10 s 90 t = 10 ms 8 p I Non repetitive surge peak on-state current (F = 50 Hz) A TSM t = 1s 3.5 Storage temperature range T - 55 to 150 stg C T 150 Maximum junction temperature j T Maximum lead temperature for soldering during 10 s. 260 C L 1. See Figure 3. Table 2. Thermal resistances Symbol Parameter Value Unit R Junction to ambient 170 C/W th(j-a) Table 3. Electrical characteristics (T = 25 C) amb Symbol Parameter V Stand-off voltage RM V Breakdown voltage BR V Breakover voltage BO I Leakage current RM I Peak pulse current PP I Breakover current BO I Holding current H V Forward voltage drop F C Capacitance V BO I V V I V I I RM RM BR R BO BO H dyn. Order code max. min. max. typ. max. min. (1) (2) (1) (3) note note note note A V V mA V V mA mA TPI8011N 10 70 80 1 110 120 800 150 TPI12011N 10 105 120 1 160 170 800 150 1. See the reference test circuit 1 (Figure 5.) 2. Surge test according to CCITT 1.5 kV, 10/700 s between Tip or Ring and ground 3. See functional holding current test circuit 2 (Figure 6.) Figure 2. 2/9