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ESD NOISE CLIPPING DIODE
February 2001
NEC Noise Clipping Diode NNCD
Suitable device can be selected in three types of NNCD series.
Low capacitance NNCD (8kV/10pF) and Low capacitance High ESD NNCD (30kV/20pF) are the suitable ESD protection device for high speed data line such as USB 1.1. High ESD NNCD (30kV) is the suitable device to protect ESD in normal speed data line.
connecter
ESD
Driver
The device is protected from ESD by using NNCD
NNCD
Data rate(bps)
100k 1M 10M
High ESD
(30kV)
SC-78 VBR=3.3V to 12V
Low Capacitance High ESD (30kV/20pF)
SC-59 (Dual,Anode common) VBR=6.2V
NNCD * * C
SC-76 VBR=3.3V to 12V
NNCD * * D
NNCD * * MF
SC-74A (Quad,Anode common) VBR=5.6V,6.2V,6.8V
NNCD * * MG
SC-59 (Dual,Anode common) VBR=3.3V to 12V
NNCD * * F
SC-74A (Quad,Anode common) VBR=3.3V to 7.5V,27V
NNCD * * G
Low Capacitance
(8kV/10pF)
SC-74A SC-88A (Quad,Anode common) (Quad,Anode common) VBR=5.6V,6.2V,6.8V VBR=5.6V,6.2V,6.8V
NNCD * * LG
NNCD * * LH
Note 1:ESD rating is tested based on IEC61000-4-2. Note 2:Capacitance is tested at f=1MHZ and VR=0V.
RS-422B RS-232C
2
IMT-2000
Pamphlet D11663EJ6V0PF
USB1.1
Protection device from Electrostatic Discharge and Surge
NNCD is the diode developed for the protection device from ESD(Electrostatic Discharge) and surge.
RD series
Stabilizer Level shift Detector Standard RD Standard RD Low noise RD
NNCD series
ESD protection Surge absorption For high speed signal line such as USB Low Capacitance NNCD Low Capacitance High ESD NNCD For normal-speed signal line such as RS-232C High ESD NNCD High ESD NNCD
RD for Standard Voltage
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NEC Noise Clipping Diode NNCD
ESD protection by using NNCD
When ESD invades the circuit shown in next figure, EESD (energy of ESD) divides into ENNCD (energy flowing into NNCD) and Ecircuit (energy flowing into circuit). EESD=ENNCD+Ecircuit The impedance of NNCD is smaller than that of the circuit, ENNCD>>Ecircuit Most of EESD flows to GND through the NNCD and the circuit can be protected from ESD.
ESD
EESD
Ecircuit
Circuit ENNCD
ESD protection by using NNCD
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Diode developed for ESD protection
NNCD is diode developed for ESD protection.
(1) High ESD series The High ESD NNCD series is 30kV ESD rating or more based on IEC61000-4-2 test. This series presents the product from 3.3V to 12V break down voltage for power supply application. (2) Low Capacitance NNCD series In Low Capacitance NNCD series have two types and presents the product from 5.6V to 6.8V break down voltage for 5V signal line. Series Low Capacitance NNCD Low Capacitance High ESD NNCD ESD rating 8kVmin. 30kVmin. Capacitance 10pF(typ.) 20pF(typ.)
Normal speed data line Signal line High speed data line
High ESD type
Low Capacitance NNCD Low Capacitance High ESD NNCD
Pamphlet D11663EJ6V0PF
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NEC Noise Clipping Diode NNCD
Low Capacitance NNCD series
NNCD**LG, NNCD**LH,NNCD**MF,NNCD**MG
There are two types of Low capacitance NNCD and the suitable device for high speed data line can be selected by combining capacitance and ESD rating.
Low Capacitance High ESD NNCD
100
ESD (kV) (330, 150pF contact discharge)
40
NNCD**MF NNCD**MG
30kV 20pF
High ESD NNCD 30kV/110pF (at6.2Vtype)
30
Low Capacitance NNCD with the larger ESD rating is demanded.
20
8kV 10pF
10 0
Low Capacitance NNCD
NNCD**LG NNCD**LH
100
1
10
Ct - Capacitance - pF ( VR=0V, f=1MHz )
Circuit Example in USB HUB application
Pull-up Resistor 5V D+ DGND Power IC for USB
USB Port1 USB Port2 USB Port3
3.3V Power Source
USB HUB Controller
Power IC for USB
USB Port4
Data (pair)
4 to 5 port
NNCD**LG/LH or NNCD**MG x2
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Capacitance
The diode behaves as a capacitor,except during absorbing ESD. In generally the capacitance increases the rise time and makes some problem. The small capacitance device is useful to reduce the rise time. The equivalent circuit of diode
The capacitance of Low Capacitance NNCD series is 10pF or 20pF. These devices give margin for designing line impedance.
Capacitance and Rise of waveform
(1) NNCD**LG/LH series
100
R=60
Cp-Capacitance-pF
typ. TA=25C NNCD5.6LG/LH NNCD6.2LG/LH
Vo
V-Voltage-V
R=150 R=100
10
NNCD**LG/LH Ct=10pF typ. TA=25C Vin=Vo
NNCD6.8LG/LH
1 0 1 2 3 4 5 VR-Reverce Voltage-V 6 7
0 0 5 t-Time-ns 10
(2) NNCD**MF/MG series
100
Ct-Capacitance-pF
typ. TA=25C NNCD5.6MF/MG
Vo
V-Voltage-V
R=60
R=150
10
NNCD6.2MF/MG
R=100 NNCD**MF/MG Ct=20pF typ. TA=25C Vin=Vo
1 0 1 2 3 4 VR-Reverce Voltage-V 5 6
0 0 5 t-Time-ns 10
Pamphlet D11663EJ6V0PF
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NEC Noise Clipping Diode NNCD
Down-sizing of package
NNCD**LG ,NNCD**LH and NNCD**MG are 4diode elements in one package and they can cope with more high density assembling. Especially,NNCD**LH fabricated in SC-88A package is about 50% reduction comparing with the area of NNCD**LG. NNCD**LH is the suitable device to the ESD protection of the equipment such as cellular phone that miniaturization and lightening are demanded.
NNCD**LG
2.8 1.5 1
2.9
NNCD**LH
2.1 1.25 1
2.0
Terminal connection
5 4 1: K1 2: A 3: K2 4: K3 5: K4 Cathode 1 (Anode common) Cathode 2 Cathode 3 Cathode 4
5
2 3
2 3 4
5
4
1.25
SC-74A
0.9
1
2
3
SC-88A
Circuit example in Cellular Phone application
PC modem
Cellular Phone
Connector
Interface IC NNCD**LH
Connector
NNCD**LH
Interface IC
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Circuit example in Li-ion Battery application
NNCD**C NNCD**D Li-ion battery Note PC
Data line Protect Control IC Microcomputer Interface IC
NNCD**LG NNCD**LH NNCD**MF NNCD**MG
Circuit example in DVC application
Camcorder AF system Video Signal Processing circuit CCD Audio Signal Processing circuit Inter-face IC Video Audio-R Audio-L NNCD**C NNCD**D NNCD**F NNCD**MF
MIC
Recoding and play circuit
Pamphlet D11663EJ6V0PF
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NEC Noise Clipping Diode NNCD
High ESD NNCD
NNCD**A, NNCD**B, NNCD**C, NNCD**D NNCD**E, NNCD**F, NNCD**G
High ESD NNCD assures the endurance of 30kV ESD, based on the IEC61000-4-2 test on EMI.
1000
High ESD NNCD Condition Measuring Circuit:IEC61000-4-2 Interval:1sec times 10cycle C=150pF R=330 TA=25C Broken No Broken
ESD rating-kV
100
NNCD**MF/MG
10
NNCD**LG/LH
1 1 10 VBR-Nominal Break Down Voltage-V 100
Circuit Example in RS-232C application
Printer Power supply
Motor
Control circuit
NNCD
Connector
10
Pamphlet D11663EJ6V0PF
High ESD NNCD series can be used for the protection against the surge which appears in the circuit, such as the DC power supply.
Voltage
Device
Voltage
Breakdown Voltage
Time
NNCD
Time
Surge Reverse Power
Surge Reverse Power in the repetition pulse NNCD D/E/F/G
TA=25C, Single pulse
PRSM-Surge Reverse Power-W
P-Surge Reverse Power-W
1000
10
Duty=10%
**
P
PRSM
tT
t T
Duty=t/T (%)
100
NNCD**A/B/E/F/G
1
Duty=50%
TA=25C TA=65C TA=85C TA=25C TA=65C TA=85C
10
NNCD**C
NNCD**D
NNCD**LG/LH
1 1
10
100
0.1 1m 10m
0.1
1
10
100
1m
10m
tT-Width of pulse-s
t-Width of pulse-s
Circuit example
Vcc IC IN Vcc Vcc
NNCD NNCD
NNCD
(1) The over-voltage absorption of the Vcc line of the IC
(2) The over-voltage absorption of the Tr circuit
(3) The over-voltage absorption of the FET circuit
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NEC Noise Clipping Diode NNCD
Product Line Up of NNCD
SMD products
Series
NNCD
Breakdown Number of Voltage Type
3.3 to 12V 15
ESD
30kVmin
Power Dissipation
150mW 200mW
Package
2pin USM (SC-78) 2pin SSP (SC-76) 3pin MM (SC-59)
**C NNCD**D NNCD**E
SMD products (Compound type with anode common)
Series
NNCD**F NNCD**G NNCD**LG NNCD**LH NNCD**MF NNCD**MG
Breakdown Number of Voltage Type
3.3 to 12V 3.3 to 7.5 27V 5.6 to 6.8V 6.2V 5.6 to 6.8V 15 12 3 1 3
ESD
30kVmin
Power Dissipation
Package
3pin MM (Dual) (SC-59) 5pin MM (Quad) (SC-74A) 5pin SSP (Quad) (SC-88A) 3pin MM (Dual) (SC-59) 5pin MM (Quad) (SC-74A)
200mW 8kVmin 30kVmin
DHD products
Series
NNCD**A NNCD**B
Breakdown Number of Voltage Type
3.3 to12V 15
ESD
30kVmin
Power Dissipation
400mW 500mW
Package
DO-34 DO-35
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Pamphlet D11663EJ6V0PF
NNCD products line up
Low capacitance series
Type Power ESD Capacitance Series 5.6V VBR 6.2V 6.8V Package Low Capacitance 200mW 8kV min. 10pF typ. NNCD**LG NNCD**LH
NNCD5.6LG NNCD6.2LG NNCD6.8LG SC-74A (Quad) NNCD5.6LH NNCD6.2LH NNCD6.8LH SC-88A (Quad) NNCD6.2MF SC-59 (Dual)
Low Capacitance High ESD 200mW 30kV min. 20pF typ. NNCD**MF NNCD**MG
NNCD5.6MG NNCD6.2MG NNCD6.8MG SC-74A (Quad)
High ESD series
Power Series
3.3V 3.6V 3.9V 4.3V
400mW 500mW 150mW 200mW NNCD**A NNCD**B NNCD**C NNCD**D NNCD**E NNCD**F NNCD**G
NNCD3.3A NNCD3.3B NNCD3.3C NNCD3.3D NNCD3.3E NNCD3.3F NNCD3.3G NNCD3.6A NNCD3.6B NNCD3.6C NNCD3.6D NNCD3.6E NNCD3.6F NNCD3.6G NNCD3.9A NNCD3.9B NNCD3.9C NNCD3.9D NNCD3.9E NNCD3.9F NNCD3.9G NNCD4.3A NNCD4.3B NNCD4.3C NNCD4.3D NNCD4.3E NNCD4.3F NNCD4.3G NNCD4.7A NNCD4.7B NNCD4.7C NNCD4.7D NNCD4.7E NNCD4.7F NNCD4.7G NNCD5.1A NNCD5.1B NNCD5.1C NNCD5.1D NNCD5.1E NNCD5.1F NNCD5.1G NNCD5.6A NNCD5.6B NNCD5.6C NNCD5.6D NNCD5.6E NNCD5.6F NNCD5.6G NNCD6.2A NNCD6.2B NNCD6.2C NNCD6.2D NNCD6.2E NNCD6.2F NNCD6.2G NNCD6.8A NNCD6.8B NNCD6.8C NNCD6.8D NNCD6.8E NNCD6.8F NNCD6.8G NNCD7.5A NNCD7.5B NNCD7.5C NNCD7.5D NNCD7.5E NNCD7.5F NNCD7.5G NNCD8.2A NNCD8.2B NNCD8.2C NNCD8.2D NNCD8.2E NNCD8.2F NNCD9.1A NNCD9.1B NNCD9.1C NNCD9.1D NNCD9.1E NNCD9.1F NNCD10A NNCD11A NNCD12A - DO-34 NNCD10B NNCD11B NNCD12B - DO-35 NNCD10C NNCD11C NNCD12C - 2pin USM (SC-78) NNCD10D NNCD11D NNCD12D - 2pin SSP (SC-76) NNCD10E NNCD11E NNCD12E NNCD10F NNCD11F NNCD12F - - - - -
Breakdown Voltage
4.7V 5.1V 5.6V 6.2V 6.8V 7.5V 8.2V 9.1V 10V 11V 12V 27V
- - NNCD27G 3 pin MM 3 pin MM 5 pin MM (SC-59) (SC-59 Dual) (SC-59 Quad)
Package
Pamphlet D11663EJ6V0PF
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NEC Noise Clipping Diode NNCD
Out line of package
SMD products
Unit: mm Package 2pin Ultra Super Mini Mold (SC-78) 2pin Super Mini Mold (SC-76) 3pin Mini Mold (SC-59)
Appearance
0.8
1.25
Out line drawing
1.3 2.1
0.7 1.7 2.5 0.9
2.8 1.5
2.9
1.25
Package
5pin Mini Mold (SC-74A)
5pin Super Mini Mold (SC-88A)
Appearance
Out line drawing
2.9
2.1 1.25
2.8 1.5
1.25
2.0
0.9
DHD products
Unit: mm Package DO-34 DO-35
2.0 max
2.0 max
Out line drawing
25 min 2.4 max 25 min
0.4 max
25 min 4.2 max
25 min
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Pamphlet D11663EJ6V0PF
0.5 max
Mounting pad dimension (Minimum recommended value)
Package 2pin Ultra Super Mini Mold (SC-78)
0.8
2pin Super Mini Mold (SC-76)
0.8
Unit: mm 3pin Mini Mold (SC-59)
0.8
Mounting pad dimension
0.6
0.9
1.0
2.0
2.3 0.95 0.95
Package
5pin Mini Mold (SC-74A)
0.95 0.95 0.6
5pin Super Mini Mold (SC-88A)
0.65 0.65 0.4
1.0
Mounting pad dimension
0.8
sIEC61000-4-2
[ Testing circuit ]
Discharge S.W Rch Rd 330 Cs H.V.D.C 150pF
2.4
[ Testing levels ] 1a-Contact discharge 1b-Air discharge
1.9
Level
Discharge electrode
Test Voltage 2 kV 4 kV 6 kV 8 kV Special
Level 1 2 3 4 X
Earth return cable
1 2 3 4 X
2.4
Test Voltage 2 kV 4 kV 8 kV 15 kV Special
Pamphlet D11663EJ6V0PF
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qMEMOq
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* The information in this document is current as of December, 2000. The information is subject to change without notice. For actual design-in, refer to the latest publications of NEC's data sheets or data books, etc., for the most up-to-date specifications of NEC semiconductor products. Not all products and/or types are available in every country. Please check with an NEC sales representative for availability and additional information. * No part of this document may be copied or reproduced in any form or by any means without prior written consent of NEC. NEC assumes no responsibility for any errors that may appear in this document. * NEC does not assume any liability for infringement of patents, copyrights or other intellectual property rights of third parties by or arising from the use of NEC semiconductor products listed in this document or any other liability arising from the use of such products. No license, express, implied or otherwise, is granted under any patents, copyrights or other intellectual property rights of NEC or others. * Descriptions of circuits, software and other related information in this document are provided for illustrative purposes in semiconductor product operation and application examples. The incorporation of these circuits, software and information in the design of customer's equipment shall be done under the full responsibility of customer. NEC assumes no responsibility for any losses incurred by customers or third parties arising from the use of these circuits, software and information. * While NEC endeavours to enhance the quality, reliability and safety of NEC semiconductor products, customers agree and acknowledge that the possibility of defects thereof cannot be eliminated entirely. To minimize risks of damage to property or injury (including death) to persons arising from defects in NEC semiconductor products, customers must incorporate sufficient safety measures in their design, such as redundancy, fire-containment, and anti-failure features. * NEC semiconductor products are classified into the following three quality grades: "Standard", "Special" and "Specific". The "Specific" quality grade applies only to semiconductor products developed based on a customer-designated "quality assurance program" for a specific application. The recommended applications of a semiconductor product depend on its quality grade, as indicated below. Customers must check the quality grade of each semiconductor product before using it in a particular application. "Standard": Computers, office equipment, communications equipment, test and measurement equipment, audio and visual equipment, home electronic appliances, machine tools, personal electronic equipment and industrial robots "Special": Transportation equipment (automobiles, trains, ships, etc.), traffic control systems, anti-disaster systems, anti-crime systems, safety equipment and medical equipment (not specifically designed for life support) "Specific": Aircraft, aerospace equipment, submersible repeaters, nuclear reactor control systems, life support systems and medical equipment for life support, etc. The quality grade of NEC semiconductor products is "Standard" unless otherwise expressly specified in NEC's data sheets or data books, etc. If customers wish to use NEC semiconductor products in applications not intended by NEC, they must contact an NEC sales representative in advance to determine NEC's willingness to support a given application. (Note) (1) "NEC" as used in this statement means NEC Corporation and also includes its majority-owned subsidiaries. (2) "NEC semiconductor products" means any semiconductor product developed or manufactured by or for NEC (as defined above).
M8E 00. 4
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Pamphlet D11663EJ6V0PF
For further information, please contact:
NEC Corporation NEC Building 7-1, Shiba 5-chome, Minato-ku Tokyo 108-8001, Japan Tel: 03-3454-1111 http://www.ic.nec.co.jp/ [North & South America] NEC Electronics Inc. 2880 Scott Blvd. Santa Clara, CA 95050-2554, U.S.A. Tel: 408-588-6000 800-366-9782 Fax: 408-588-6130 800-729-9288 http://www.necel.com/ NEC do Brasil S.A. Electron Devices Division Rodovia Presidente Dutra, Km 214 07210-902-Guarulhos-SP Brasil Tel: 011-6462-6810 Fax: 011-6462-6829 [Europe] NEC Electronics (Germany) GmbH Kanzlerstr. 2, 40472 Dusseldorf, Germany Tel: 0211-650302 Fax: 0211-6503490 http://www.nec.de/ Munich Office Arabellastr. 17 81925 Munchen, Germany Tel: 089-921003-0 Fax: 089-92100315 Stuttgart Office Industriestr. 3 D-70565 Stuttgart, Germany Tel: 0711-99010-0 Fax: 0711-99010-19 Hannover Office Podbielskistr. 164 D-30177 Hannover, Germany Tel: 0511-33402-0 Fax: 0511-33402-34 Benelux Office Boschdijk 187a 5612 HB Eindhoven, The Netherlands Tel: 040-2445845 Fax: 040-2444580 Scandinavia Office P.O. Box 134 18322 Taeby, Sweden Tel: 08-6380820 Fax: 08-6380388 NEC Electronics (UK) Limited Cygnus House, Sunrise Parkway, Linford Wood, Milton Keynes, MK14 6NP, U.K. Tel: 01908-691-133 Fax: 01908-670-290 NEC Electronics (France) S.A. 9, rue Paul Dautier-BP 187 78142 Velizy-Villacoublay Cedex France Tel: 01-3067-5800 Fax: 01-3067-5899 Madrid Office Juan Esplandiu, 15 28007 Madrid, Spain Tel: 091-504-2787 Fax: 091-504-2860 NEC Electronics Italiana s.r.l. Via Fabio Filzi, 25/A, 20124 Milano, Italy Tel: 02-667541 Fax: 02-66754299
[Asia & Oceania] NEC Electronics Hong Kong Limited 12/F., Cityplaza 4, 12 Taikoo Wan Road, Hong Kong Tel: 2886-9318 Fax: 2886-9022/9044 Seoul Branch 10F, ILSONG Bldg., 157-37, Samsung-Dong, Kangnam-Ku Seoul, the Republic of Korea Tel: 02-528-0303 Fax: 02-528-4411 NEC Electronics Taiwan Ltd. 7F, No. 363 Fu Shing North Road Taipei, Taiwan, R. O. C. Tel: 02-2719-2377 Fax: 02-2719-5951 NEC Electronics Singapore Pte. Ltd. 238A Thomson Road #12-01/10 Novena Square Singapore 307684 Tel: 253-8311 Fax: 250-3583
G01. 2
Document No. D11663EJ6V0PF00 (6th edition) Date Published February 2001 N CP(K)
(c) NEC Corporation 1996
Printed in Japan

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