DS9503 Dallas Semiconducotr, DS9503 Datasheet

DS9503

Manufacturer Part Number

DS9503

Description

ESD Protection Diode with Resistors

Manufacturer

Dallas Semiconducotr

Datasheet

1.DS9503.pdf (3 pages)

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SPECIAL FEATURES

§ Zener characteristic with voltage snap–back

§ High avalanche voltage, low leakage and low

§ Compatible to all 5V logic families

§ Space saving, low inductance TSOC surface

§ On–chip 5 resistors for isolation at both

§ Industrial temperature range

DESCRIPTION

This DS9503 is designed as an ESD protection device for 1–Wire MicroLAN interfaces. In contrast to the

DS9502, the DS9503 includes two 5 isolation resistors on chip. Although 5 are negligible during

communication, they represent a high impedance relative to the conducting diode during an ESD event.

Thus, the diode absorbs the energy while the resistors further isolate and protect the circuit at the other

side of the package. If used with circuits that already have a strong ESD–protection at their I/O port, the

ESD protection level is raised to more that 27 kV (IEC 801–2 Reference model). In case of abnormal

ESD hits beyond its maximum ratings the DS9503 will eventually fail “short” thus preventing further

damage.

exceeds the trigger voltage, the I/V characteristic of the device will “snapback” allowing the same or

higher amount of current to flow, but at a significantly lower voltage. As long as a minimum current or

voltage is maintained, the device will stay in the “snapback mode”. If the voltage or the current falls

below the holding voltage or holding current, the device will abruptly change to its normal mode and

conduct only a small leakage current.

During normal operation the DS9503 behaves like a regular 7.5V Zener Diode. When the voltage

www.dalsemi.com

to protect against ESD hits

capacitance avoid signal attenuation

mount package

anode and cathode terminals

ESD Protection Diode with Resistors

1 of 3

SYMBOL AND CONVENTIONS

PACKAGE OUTLINE

ORDERING INFORMATION

DS9503P

See Mech. Drawings

3.7 X 4.0 X 1.5 mm

TOP VIEW

Section

TSOC SURFACE MOUNT PACKAGE

6-lead TSOC package

VCA

SIDE VIEW

DS9503

102199

Related parts for DS9503

DS9503 Summary of contents

Page 1

... Industrial temperature range DESCRIPTION This DS9503 is designed as an ESD protection device for 1–Wire MicroLAN interfaces. In contrast to the DS9502, the DS9503 includes two 5 isolation resistors on chip. Although 5 are negligible during communication, they represent a high impedance relative to the conducting diode during an ESD event. ...

Page 2

... DC CHARACTERISTICS Figure 1 DC CHARACTERISTICS DETAIL DRAWING Figure 2 TEST PULSE WAVEFORM Figure 3 TYPICAL APPLICATION Figure DS9503 102199 ...

Page 3

... I 30 HOLD SYMBOL MIN TYP SYMBOL MIN TYP DS9503 (- +85 C) MAX UNITS NOTES 100 nA 2 7.8 V 1,3 9 1000 -0 -100 = MAX UNITS ...

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