DA108S1 DA112S1 ASD (Application Specific Devices) Diode Array Main applications ■ Protection of logic side of ISDN S-interface ■ Protection of I/O lines of microcontroller ■ Signal conditioning Features ■ Array of 8 or 12 diodes ■ Low input capacitance ■ Suitable for digital line protection SO-8 Functional diagram: DA108S1 Description ARRAY of 8 or 12 diodes configured by cells of 2 diodes, each cell being used to protect signal line from transient overvoltages by clamping action. I/O1 REF1 I/O2 REF2 COMPLIES WITH FOLLOWING STANDARDS : I/O3 REF3 IEC 61000-4-2 Level 4: I/O4 REF4 – 15kV (air discharge) – 8kV (contact discharge) Functional diagram: DA112S1 February 2007 Rev 5 I/O1 1 8 REF1 I/O2 2 7 I/O6 I/O3 3 6 REF2 I/O4 4 5 I/O5 1/8 www.st.com Characteristics DA108S1 / DA112S1 1 Characteristics Table 1. Absolute maximum ratings (Tamb = 25 °C) Symbol Parameter Repetitive peak reverse voltage (for one single diode) VRRM IPP Repetitive peak forward current (see Note 1) P Power dissipation Storage temperature range Tstg Unit 200 V 100 A 0.73 W -55 to + 150 °C Tj Maximum operating junction temperature 150 °C TL Maximum lead temperature for soldering during 10 s. 260 °C Note: 1 Table 2. The surge is repeated after the device returns to ambient temperature Thermal resistances Symbol Rth (j-a) Table 3. Parameter Junction to ambient Value Unit 170 °C/W Max. Unit 1. Electrical characteristics(Tamb = 25 °C) Symbol 2/8 8/20 µs Value Parameter DA108S1 9 DA112S1 12 IR Peak forward voltage VF Forward voltage IF = 50 mA 1.2 V IR Reverse leakage current VR = 15 V 2 µA IPP = 12 A, 8/20 µS V DA108S1 / DA112S1 Characteristics Figure 1. Input capacitance VCC connected between REF1 and REF2 Input applied : DC bias + 950 mV(RMS) at 1 MHZ 36 C (pF) Typical values 34 VCC = 5 V VCC = 15 V 32 REF2 30 28 I/O 26 VCC G 22 0 REF1 Figure 2. 24 VF (V) 1.6 Typical values Tj = 25 o C 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0.0 4 6 8 10 12 14 16 DC bias (V) Typical peak forward voltage characteristics (8/20 µs pulse 2.0 1.8 2 0.001 0.01 0.1 I F (A) 1 VF (V) 10.0 9.0 o Tj = 25 C 8.0 7.0 6.0 5.0 4.0 3.0 2.0 1.0 0.0 1 Typical values I F (A) 10 20 3/8 Characteristics Figure 3. DA108S1 / DA112S1 APPLICATION 1: ISDN Interface ProtectionResidual lightning surges at transformer secondary are suppressed by DA108S1 Vcc LOGIC SIDE LINE SIDE A GND Vcc Vss TPIxx B Vcc Vss A GND Vss Vcc TPIxx B Vss DA1xx S1 Figure 4. APPLICATION 2: Microcontroller I/O port protection Vcc Vcc 4-6 bit input port I/O Vcc I/O μc Vcc I/O Vcc I/O DA1xx S1 Note: 4/8 IMPORTANT : DA108S1 must imperatively be connected to the reference voltages by REF1 and REF2. DA108S1 / DA112S1 2 Ordering information scheme Ordering information scheme DA 1 08 S 1 RL Diode Array Version Number of diodes 08 = 12 12 = 12 Serial Package 1 = SO-8 Packaging RL = Tape & reel Blank = Tube 5/8 Package mechanical data 3 DA108S1 / DA112S1 Package mechanical data ● Epoxy meets UL94, V0 Table 4. SO-8 Dimensions Dimensions ccc C Ref. A2 e b C (Seating Plane) A Millimeters Min. Typ. A A1 Inches Max. Min. Typ. 1.75 0.25 Max. 0.069 A1 0.1 A2 1.25 0.004 0.010 b 0.28 0.48 0.011 0.019 C 0.17 0.23 0.007 0.009 D 4.80 4.90 5.00 0.189 0.193 0.197 E 5.80 6.00 6.20 0.228 0.236 0.244 E1 3.80 3.90 4.00 0.150 0.154 0.157 h x 45° 0.25mm (Gage Plane) C L k L1 D e 8 5 E1 E 1.27 4 0.050 h 0.25 0.50 0.010 0.020 L 0.40 1.27 0.016 0.050 L1 1 0.049 k° ccc 1.04 0 0.041 8 0.10 0 8 0.004 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 package and 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. 6/8 DA108S1 / DA112S1 4 Ordering information Ordering information Part number Marking Package Weight Base qty Delivery mode 100 Tube 2500 Tape and reel(1) 100 Tube 2500 Tape and reel(1) DA108S1 DA108S DA108S1RL SO-8 0.11 g DA112S1 DA112S DA112S1RL 1. Preference packaging is tape and reel 5 Revision history Date Revision Changes Aug-2001 4 Last release. 15-Feb-2007 5 Reformatted to current standard. Standard typing error corrected. 7/8 DA108S1 / DA112S1 Please Read Carefully: Information in this document is provided solely in connection with ST products. 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