Datasheet

ManualsBrandsSTMICROELECTRONICS ManualsDiodesTVS Diode Case type SOIC-8

ESDA25B1

October 1999 - Ed : 2

6 BIDIRECTIONAL TRANSIL



FUNCTIONS

VERY LOW CAPACITANCE : C= 20 pF @ V

150 W peak pulse power (8/20

FEATURES

SO-8

FUNCTIONAL DIAGRAM

I/O 1

I/O 2

I/O 3 I/O 4

I/O 6

GNDGND

I/O 5

DESCRIPTION

The ESDA25B1 is a monolithic voltage suppressor

designed to protect components which are

connected to data and transmission lines against

EDS.

TRANSIL



ARRAY

FOR ESD PROTECTION

Application Specific Discretes

A.S.D.



Where transient overvoltage protection in ESD

sensitive equipment is required, such as :

- COMPUTER

- PRINTERS

- COMMUNICATION SYSTEMS

It is particulary recommended for RS232 I/O port

protection where the line interface withstands only

2 kV ESD surges.

APPLICATIONS

BENEFITS

High ESD protection level : up to 25 kV

High integration

Suitable for high density boards

IEC 1000-4-2 : level 4

MIL STD 883C-Method 3015-6 : class 3

(human body model)

COMPLIES WITH THE FOLLOWING STANDARDS :

1/5

Summary of content (5 pages)

PAGE 1
ESDA25B1 ® TRANSIL ARRAY FOR ESD PROTECTION Application Specific Discretes A.S.D. APPLICATIONS Where transient overvoltage protection in ESD sensitive equipment is required, such as : - COMPUTER - PRINTERS - COMMUNICATION SYSTEMS It is particulary recommended for RS232 I/O port protection where the line interface withstands only 2 kV ESD surges.
PAGE 2
ESDA25B1 ABSOLUTE MAXIMUM RATINGS (Tamb = 25°C) Symbol Parameter Value Unit VPP Electrostatic discharge MIL STD 883C - Method 3015-6 25 kV PPP Peak pulse power (8/20µs) 150 W Tstg Tj Storage temperature range Maximum junction temperature - 55 to + 150 125 °C °C TL Maximum lead temperature for soldering during 10s 260 °C ELECTRICAL CHARACTERISTICS (Tamb = 25°C) Symbol Parameter VRM Stand-off voltage VBR Breakdown voltage VCL Clamping voltage IRM Leakage current IPP Peak pulse c
PAGE 3
ESDA25B1 CALCULATION OF THE CLAMPING VOLTAGE USE OF THE DYNAMIC RESISTANCE The ESDA family has been designed to clamp fast spikes like ESD. Generally the PCB designers need to calculate easily the clamping voltage VCL. This is why we give the dynamic resistance in addition to the classical parameters. The voltage across the protection cell can be calculated with the following formula: VCL = VBR + Rd IPP As the value of the dynamic resistance remains stable for a surge duration lower than 20µs, the 2.
PAGE 4
ESDA25B1 Fig. 1 : Peak power dissipation versus initial junction temperature. Fig. 2 : Peak pulse power versus exponential pulse duration (Tj initial = 25 °C). Ppp[Tj initial]/Ppp[Tj initial=25°C] 1.1 1.0 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.0 Ppp(W) 2000 1000 100 Tj initial(°C) 0 25 50 75 tp(µs) 100 125 150 Fig. 3 : Clamping voltage versus peak pulse current (Tj initial = 25 °C). Rectangular waveform tp = 2.5 µs. 10 1 10 100 Fig.
PAGE 5
ESDA25B1 ORDER CODE ESDA 25 B 1 RL PACKAGING: RL = Tape and reel = Tube ESD ARRAY VBR min PACKAGE : SO-8 Bidirectionel MARKING : Logo, Date Code, E25B1 PACKAGE MECHANICAL DATA SO-8 Plastic DIMENSIONS REF. Millimeters Min. A a1 a2 a3 b b1 C c1 D E e e3 F L M S Typ. Max. Min. Typ. Max. 1.75 0.25 0.004 1.65 0.85 0.026 0.48 0.014 0.25 0.007 0.5 0.010 45° (typ) 5.0 0.189 6.2 0.228 0.069 0.010 0.065 0.033 0.019 0.010 0.020 0.1 0.65 0.35 0.19 0.25 4.8 5.8 1.27 3.81 3.8 0.4 Inches 0.197 0.244 0.050 0.