# TVS Diode, DA1, Unidirectional, SOIC, 8 Pins

![Product image](https://novapart.co/image/farnell:2341653/)

**URL**: https://novapart.co/products/DA112S1RL/tvs-diode-da1-unidirectional-soic-8-pins
**SKU**: DA112S1RL
**Manufacturer**: STMICROELECTRONICS
**Category**: Circuit Protection || TVS - Transient Voltage Suppressors || TVS Diodes
**Price**: €0.4050
**Stock**: 500+
**Lead Time**: 120 days (indicative)

## Description

Product Range:DA1 Series; TVS Polarity:Unidirectional; Reverse Stand-Off Voltage Vrwm:-; Clamping Voltage Vc Max:-; Diode Case Style:SOIC; No. of Pins:8Pins; Breakdown Voltage Min:-; Brea

## Specifications

| Parameter | Value |
|---|---|
| Svhc | No SVHC (25-Jun-2025) |
| No. Of Pins | 8Pins |
| Tvs Polarity | Unidirectional |
| Product Range | DA1 |
| Qualification | - |
| Diode Mounting | Surface Mount |
| Diode Case Style | SOIC |
| Clamping Voltage Max | - |
| Reverse Standoff Voltage | - |
| Maximum Breakdown Voltage | - |
| Minimum Breakdown Voltage | - |
| Operating Temperature Max | 150°C |
| Peak Pulse Power Dissipation | - |

## Datasheet

📄 [Download PDF](https://novapart.co/datasheet/farnell:2341653/)

Diode arra y 

**==> picture [61 x 39] intentionally omitted <==**

## **DA108S1 DA112S1** 

## **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 

**==> picture [74 x 49] intentionally omitted <==**

**==> picture [22 x 8] intentionally omitted <==**

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SO-8<br>**----- End of picture text -----**<br>


- 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** 

**==> picture [220 x 162] intentionally omitted <==**

**----- Start of picture text -----**<br>
I/O1 REF1<br>I/O2 REF2<br>I/O3 REF3<br>I/O4 REF4<br>**----- End of picture text -----**<br>


## **Figure 2. Functional diagram: DA112S1** 

**==> picture [220 x 163] intentionally omitted <==**

**----- Start of picture text -----**<br>
I/O1 1 8 REF1<br>I/O2 2 7 I/O6<br>I/O3 3 6 REF2<br>I/O4 4 5 I/O5<br>**----- End of picture text -----**<br>


1/8 

January 2008 

Rev 6 

_www.st.com_ 

**Characteristics** 

**DA108S1 / DA112S1** 

## **1 Characteristics** 

## **Table 1. Absolute maximum ratings (Tamb = 25** °C **)** 

|**Table 1.**|**Absolute maximum ratings (Tamb = 25**°C**)**|**Absolute maximum ratings (Tamb = 25**°C**)**|||
|---|---|---|---|---|
|**Symbol**|**Parameter**||**Value**|**Unit**|
|VRRM|Repetitive peak reverse voltage (for one single diode)||18|V|
|IPP|Repetitive peak forward current(1)|tp= 8/20 µs|12|A|
|P|Power dissipation||0.73|W|
|Tstg|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|



1. The surge is repeated after the device returns to ambient temperature 

## **Table 2. Thermal resistance** 

|**Table 2.**|**Thermal resistance**|||
|---|---|---|---|
|**Symbol**|**Parameter**|**Value**|**Unit**|
|Rth (j-a)|Junction to ambient|170|°C/W|



**Table 3. Electrical characteristics(T** 1. **amb = 25** °C **)** 

|**Symbol**|**Parameter**|**Parameter**||**Max.**|**Unit**|
|---|---|---|---|---|---|
|VFP|Peak forward voltage|IPP= 12 A,<br>tp= 8/20 µs|DA108S1<br>DA112S1|9<br>12|V|
|VF|Forward voltage|IF= 50 mA||1.2|V|
|IR|Reverse leakage current|VR= 15 V||2|µA|



2/8 

**DA108S1 / DA112S1** 

**Characteristics** 

## **Figure 3. Input capacitance** 

**==> picture [405 x 245] intentionally omitted <==**

**----- Start of picture text -----**<br>
V    connected between REF1 and REF2Input applied :CC 36 C (pF) Typical values<br>DC bias + 950 mV       at 1 MHZ(RMS)<br>34<br>V    = 5 VCC<br>32 V    = 15 V<br>CC<br>REF2<br>30<br>28<br>I/O 26<br>V CC 24<br>G<br>22<br>REF1 0 2 4 6 8 10 12 14 16<br>DC bias (V)<br>**----- End of picture text -----**<br>


## **Figure 4. Typical peak forward voltage characteristics (8/20 µs pulse)** 

**==> picture [405 x 144] intentionally omitted <==**

**----- Start of picture text -----**<br>
2.0 VF(V) Typical values 10.0 VF(V) Typical values<br>1.8 Tj = 25 o C 9.0 Tj = 25 o C<br>1.6 8.0<br>1.4 7.0<br>1.2 6.0<br>1.0 5.0<br>0.8 4.0<br>0.6 3.0<br>0.4 2.0<br>0.2 1.0<br>0.0 0.0<br>0.001 0.01 0.1 1 1 10 20<br>IF(A) IF(A)<br>**----- End of picture text -----**<br>


3/8 

**Characteristics** 

**DA108S1 / DA112S1** 

**Figure 5. Application 1: ISDN interface protection, residual lightning surges at transformer secondary are suppressed by DA108S1** 

**==> picture [222 x 200] intentionally omitted <==**

**----- Start of picture text -----**<br>
Vcc<br>LOGIC SIDE LINE SIDE<br>A<br>GND<br>Vcc TPIxx<br>Vss<br>B<br>Vcc<br>Vss<br>A<br>GND<br>Vcc TPIxx<br>Vss<br>B<br>Vss<br>DA1xx S1<br>**----- End of picture text -----**<br>


## **Figure 6. Application 2: microcontroller I/O port protection** 

**==> picture [244 x 191] intentionally omitted <==**

**----- Start of picture text -----**<br>
Vcc Vcc<br>4-6 bit input port<br>I/O<br>Vcc<br>I/O<br>Vcc μ c<br>I/O<br>Vcc<br>I/O<br>DA1xx S1<br>**----- End of picture text -----**<br>


_Note:_ _**IMPORTANT** : DA108S1 must be connected to the reference voltages through REF1 and REF2._ 

4/8 

**DA108S1 / DA112S1** 

**Ordering information scheme** 

## **2 Ordering information scheme** 

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**----- Start of picture text -----**<br>
Figure 7. Ordering information scheme<br>**----- End of picture text -----**<br>


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**----- Start of picture text -----**<br>
DA  1   08   S    1   RL<br>Diode Array<br>Version<br>Number of diodes<br>08 =  12<br>12 = 12<br>Serial<br>Package<br>1 = SO-8<br>Packaging<br>RL = Tape and reel<br>Blank = Tube<br>**----- End of picture text -----**<br>


5/8 

**DA108S1 / DA112S1** 

**Package mechanical data** 

## **3 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. ECOPACK specifications are available at _www.st.com_ . 

## **Table 4. SO-8 dimensions** 

|**b**<br>**ccc C**<br>**k**<br>**C**<br>**(Seating**<br>**Plane)**<br>C||||||||**E1**<br>**E**<br>**A**<br>**A2**<br>**A1**<br>**°**<br>**L**<br>**1**<br>**0.25mm**<br>**(Gage Plane)**|**E1**<br>**E**<br>**A**<br>**A2**<br>**A1**<br>**°**<br>**L**<br>**1**<br>**0.25mm**<br>**(Gage Plane)**|**Ref.**|**Dimensions**<br>**Millimeters**<br>**Inches**<br>**Min.**<br>**Typ.**<br>**Max.**<br>**Min.**<br>**Typ.**<br>**Max.**|**Dimensions**<br>**Millimeters**<br>**Inches**<br>**Min.**<br>**Typ.**<br>**Max.**<br>**Min.**<br>**Typ.**<br>**Max.**|**Dimensions**<br>**Millimeters**<br>**Inches**<br>**Min.**<br>**Typ.**<br>**Max.**<br>**Min.**<br>**Typ.**<br>**Max.**|**Dimensions**<br>**Millimeters**<br>**Inches**<br>**Min.**<br>**Typ.**<br>**Max.**<br>**Min.**<br>**Typ.**<br>**Max.**|**Dimensions**<br>**Millimeters**<br>**Inches**<br>**Min.**<br>**Typ.**<br>**Max.**<br>**Min.**<br>**Typ.**<br>**Max.**|**Dimensions**<br>**Millimeters**<br>**Inches**<br>**Min.**<br>**Typ.**<br>**Max.**<br>**Min.**<br>**Typ.**<br>**Max.**|
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|||||||||||||||**Inches**|||
||**cc**|**C**|||||||||||||||
|||||||||**A2**|**A**||||||||
|||||||||||||**Typ.**|**Max.**|**Min.**|**Typ.**|**Max.**|
|||**b**||||**e**<br>**h x 45**||||A|||1.75|||0.069|
|||||||||||A1|0.1||0.25|0.004||0.010|
|||||||||||A2|1.25|||0.049|||
||||||||||||||||||
|||||||||||b|0.28||0.48|0.011||0.019|
||||||||||||||||||
||**k**|||||**D**<br>**L**||||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|
||||||||||||||||||
|||||||||||e||1.27|||0.050||
|||||||||**E1**|||||||||
||||**8**||||**5**|**E1**||h|0.25||0.50|0.010||0.020|
|||||||||||L|0.40||1.27|0.016||0.050|
||||||||||||||||||
|||||||||||L1||1.04|||0.041||
||||~~**1**~~||||~~**4**~~|||k°|0||8|0||8|
||||||||||||||||||
|||||||||||ccc|||0.10|||0.004|



## **Figure 8. SO-8 footprint dimensions in mm (inches)** 

**==> picture [121 x 90] intentionally omitted <==**

**----- Start of picture text -----**<br>
6.8<br>(0.268)<br>0.6<br>(0.024)<br>4.2<br>(0.165)<br>1.27<br>(0.050)<br>**----- End of picture text -----**<br>


6/8 

**DA108S1 / DA112S1** 

**Ordering information** 

## **4 Ordering information** 

## **Figure 9. Ordering information** 

|**Order codes**|**Marking**|**Package**|**Weight**|**Base qty**|**Delivery mode**|
|---|---|---|---|---|---|
|DA108S1|DA108S|SO-8|0.11 g|100|Tube|
|DA108S1RL||||2500|Tape and reel(1)|
|DA112S1|DA112S|||100|Tube|
|DA112S1RL||||2500|Tape and reel(1)|



1. Prefered packaging is tape and reel 

## **5 Revision history** 

## **Figure 10. Revision history** 

|**Date**|**Revision**|**Changes**|
|---|---|---|
|Aug-2001|4|Previous release.|
|15-Feb-2007|5|Reformatted to current standard.<br>Standard typing error corrected.|
|15-Jan-2008|6|Reformatted to current standards. Added paragraph on maximum<br>input voltage range to_Description_. Parameters updated in_Table 1._<br>Added Pin 1 marker to package illustration. Added_Figure 8: SO-8_<br>_footprint dimensions in mm (inches)_.|



7/8 

**DA108S1 / DA112S1** 

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8/8 



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