Datasheet

ManualsBrandsSTMICROELECTRONICS ManualsDiodesTVS Diode

January 2008 Rev 6 1/8

DA108S1

DA112S1

Diode array

Features

■ Array of 8 or 12 diodes

■ Low input capacitance

■ Suitable for digital line protection

Complies with following standards:

■ IEC 61000-4-2 Level 4

– 15kV (air discharge)

– 8kV (contact discharge)

Applications

■ Protection of logic side of ISDN S-interface

■ Protection of I/O lines of microcontroller

■ Signal conditioning

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.

As maximum voltage of each diode is 18 V,

maximum input voltage range between two I/Os is

either 0 V to 18 V (REF1 = 0 V and REF2 =

+18 V) or -9 V to +9 V (REF1 = -9 V and REF2 =

+9 V)

Figure 1. Functional diagram: DA108S1

Figure 2. Functional diagram: DA112S1

SO-8

I/O1 REF1

REF2

REF3

REF4

I/O2

I/O3

I/O4

I/O1

REF1

I/O6

REF2

I/O5

I/O2

I/O3

I/O4

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Summary of content (8 pages)

PAGE 1
DA108S1 DA112S1 Diode array Features ■ Array of 8 or 12 diodes ■ Low input capacitance ■ Suitable for digital line protection Complies with following standards: ■ IEC 61000-4-2 Level 4 – 15kV (air discharge) – 8kV (contact discharge) SO-8 Figure 1.
PAGE 2
Characteristics DA108S1 / DA112S1 1 Characteristics Table 1. Absolute maximum ratings (Tamb = 25 °C) Symbol Value Unit 18 V 12 A 0.73 W Storage temperature range -55 to +150 °C Tj Operating junction temperature range -55 to +150 °C TL Maximum lead temperature for soldering during 10 s. 260 °C VRRM IPP P Parameter Repetitive peak reverse voltage (for one single diode) Repetitive peak forward current (1) tp = 8/20 µs Power dissipation Tstg 1.
PAGE 3
DA108S1 / DA112S1 Characteristics Figure 3. Input capacitance VCC connected between REF1 and REF2 36 Input applied : DC bias + 950 mV(RMS) at 1 MHZ C (pF) Typical values 34 VCC= 5 V VCC= 15 V 32 REF2 30 28 I/O 26 V CC G 24 22 REF1 0 2 4 6 8 10 12 14 16 DC bias (V) Figure 4. Typical peak forward voltage characteristics (8/20 µs pulse) VF (V) Typical values 2.0 1.8 1.6 o Tj = 25 C 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0.0 0.001 0.01 0.1 I F (A) 1 VF (V) 10.0 9.0 o Tj = 25 C 8.0 7.
PAGE 4
Characteristics Figure 5. DA108S1 / DA112S1 Application 1: ISDN interface protection, residual 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 6. 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 be connected to the reference voltages through REF1 and REF2.
PAGE 5
DA108S1 / DA112S1 2 Ordering information scheme Ordering information scheme Figure 7.
PAGE 6
Package mechanical data 3 DA108S1 / DA112S1 Package mechanical data ● Epoxy meets UL94, 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 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.
PAGE 7
DA108S1 / DA112S1 4 Ordering information Ordering information Figure 9. Ordering information Order codes 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. Prefered packaging is tape and reel 5 Revision history Figure 10. Revision history Date Revision Aug-2001 4 Previous release. 15-Feb-2007 5 Reformatted to current standard.
PAGE 8
DA108S1 / DA112S1 Please Read Carefully: Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST’s terms and conditions of sale.