DN004 Applications port: protection cellular phones, notebooks co

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DN004 Applications port: protection cellular phones, notebooks co

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DN004
Applications port: protection cellular phones, notebooks computers, PDA, etc. protection sensitive electronic equipment. protection applications where capacitive loading required.
CHANNEL PROTECTION ARRAY
Features channel protection 15KV protection (HBM) contact, 15KV protection 1000-4-2 loading capacitance, typ. Miniature 4-pin SOT-143 package
ABSOLUTE MAXIMUM RATINGS
Product Description DN004 diode array designed provide channels protection electronic components sub-systems. Each channel consists pair diodes which steers current pulse either positive (VP) negative (VN) supply. DN004 will protect against pulses Human Body Model, contact discharge International Standard IEC1000-4-2. This device identical characteristics DN006 channel array). They used together order provide larger number protected inputs required. This device particularly well-suited portable electronics (e.g. cellular phones, PDAs, notebook computers) because small package footprint, high protection level, loading capacitance. also suitable protecting video output lines ports computers peripheral equipment. SCHEMATIC CONFIGURATION
Diode Forward Current (Note 20mA Storage Temperature -65°C 150°C Operating Temperature Range 70°C Voltage Channel Input VN-0.5V VP+0.5V
Note Only diode conducting time.
STANDARD SPECIFICATIONS Param Min. Operating Supply Voltage 0.65 Diode Forward Voltage, 20mA, 25°C Diode reverse breakdown voltage, 25°C 19.0 000Top Diode (Cathode 000Bottom Diode (Anode 28.0 Protection Peak Discharge Voltage Channel Input, in-system (Note 000Human Body Model, Method 3015 (Note 000Contact 1000-4-2 (Note -8KV -15KV 000Air Discharge 1000-4-2 (Note Channel Clamp Voltage 15KV HBM, 25°C
(Notes
Typ.
0.85
+8KV +15KV +13.0 -13.0 225mW
000Positive transients 000Negative transients Channel Leakage Current, 25°C Channel Input Capacitance (Measured MHz) Package Power Rating
Note Note Note Note
From pins only. bypassed with ceramic capacitor. Human Body Model MIL-STD-883, Method 3015, CDischarge=100pF, RDischarge=1.5K, VP=5.0V, VN=GND. This parameter guaranteed characterization only. Standard IEC1000-4-2 with CDischarge=150pF, RDischarge=330, VP=5V, VN=GND.
1998 California Micro Devics Corp. rights reserved. DN006 DN004 trademarks California Micro Devices Corp. California Micro Devics manufactures products covered more U.S. Pat. Nos. 5,355,014, 5,370,766, 5,514,612 other pending applications.
1993, 1998 Corp. rights reserved. 3/98
C0211297D
Topaz Street, Milpitas, California 95035
Tel: (408) 263-3214
Fax: (408) 263-7846
Input Capacitance Input Voltage
DN004
Input Capacitance (pF)
Input Voltage
Typical variation with VIN. (VP=5V, VN=0V)
SOT-143
PACDN004M/B
Application Information
order realize maximum protection against pulses with DN004, care must taken layout minimize parasitic series inductance Supply Ground rails. Refer Figure which illustrates case positive pulse applied between input channel Chassis Ground. parasitic series inductance back power supply represented voltage line being protected Forward voltage drop d(Iesd)/dt VSupply
where Iesd current pulse, VSupply positive supply voltage.
POSITIVE SUPPLY RAIL
PATH CURRENT PULSE Iesd
CHANNEL DN004
CHANNEL INPUT
©1993, 1998 Corp. rights reserved.
current pulse rise from zero peak value very short time. example, consider case pulse that rises from zero Amps 1nS. Here d(Iesd)/dt approximated Iesd/t, 10/(1x10-9). each nano Henry series inductance (L1) will lead increment
Similarly negative pulses, parasitic series inductance from ground rail will lead increased negative voltage line being protected. Another consideration output impedance power supply fast transient currents. Most power supplies exhibit much higher output impedance fast transient current spikes. equation above, VSupply term, reality, given (VDC Iesd Rout), where Rout nominal supply output voltage effective output impedance power supply respectively. example, Rout would result increment peak Iesd 10A. mitigate this effect, high frequency bypass capacitor should connected between
LINE BEING PROTECTED SYSTEM CIRCUITRY BEING PROTECTED
Figure
PACDN004M/R
GROUND RAIL
STANDARD PART ORDE RING INFORMATION Orde ring Part Pins Style Tape
Part Mark
D004
Topaz Street, Milpitas, California 95035
Tel: (408) 263-3214
Fax: (408) 263-7846
3/98
DN004
DN004 ground plane. value this bypass capacitor should chosen such that will absorb charge transferred pulse with minimal change Typically value range adequate IEC-1000-4-2, level contact discharge protection (8KV). Ceramic chip capacitors mounted with short printed circuit board traces good choice this application. Electrolytic capacitors should avoided they have poor high frequency characteristics. extra protection, connect zener diode parallel with bypass capacitor mitigate effects parasitic series inductance inherent capacitor. breakdown voltage zener diode should slightly higher than maximum supply voltage. general rule, DN004 should located close possible point entry expected electrostatic discharges. power supply bypass capacitor mentioned above should close DN004 possible, with minimum trace lengths power supply ground planes minimize stray series inductance.
SOT-143 VIEW
1993, 1998 Corp. rights reserved. 3/98
Package Dimensions, Power Dissipation Information Package SOT-143 Pins inches 0.890 1.120 0.035 0.044 0.013 0.100 0.0005 0.004 0.760 0.940 0.030 0.037 0.370 0.510 0.015 0.020 0.0850 0.180 0.0033 0.0071 2.800 3.040 0.110 0.120 1.200 1.400 0.047 0.055 1.920 0.076 0.20 0.008 2.100 2.640 0.083 0.104 0.55 0.022 .225W 1000 tape reel 2,500
Tel: (408) 263-3214
Power Derating Curve Mechanical Specifications Lead Plating Tin-Lead Lead Material Copper Alloy Lead Coplanarity 0.004" (0.102mm) Substrate Material Silicon Body Material Molded Epoxy Flammability UL94V-0
Fax: (408) 263-7846
Topaz Street, Milpitas, California 95035
DN004
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©1993, 1998 Corp. rights reserved.
Topaz Street, Milpitas, California 95035
Tel: (408) 263-3214
Fax: (408) 263-7846
3/98

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