Datasheet

ManualsBrandsSTMICROELECTRONICS ManualsDiodesTVS Diode

This is information on a product in full production.

September 2012 Doc ID 11599 Rev 4 1/12

DVIULC6-4SC6

Ultralow capacitance ESD protection

Datasheet  production data

Features

■ 4-line ESD protection (IEC 61000-4-2)

■ Protects V

BUS

when applicable

■ Ultralow capacitance: 0.6 pF at 825 MHz

■ Fast response time compared with varistors

■ SOT23-6L package

■ RoHS compliant

Benefits

■ ESD standards compliance guaranteed at

device level, hence greater immunity at system

level

■ ESD protection of V

BUS

, when applicable,

allows ESD current flowing to ground when

ESD event occurs on data line

■ Optimized rise and fall times for maximum data

integrity

■ Consistent D+ / D- signal balance:

– Optimum capacitance matching tolerance

for ultralow intra-pair skew:

I/O to ground = 0.015 pF,

I/O to I/O = 0.007 pF

– Matching high bit rate DVI, HDMI, and

IEEE 1394 requirements

■ Low PCB space occupation: 9 mm

■

Low leakage current for longer operation of

battery powered devices

■ Higher reliability offered by monolithic

integration

Complies with these standards

■ IEC 61000-4-2 level 4:

– ±15 kV (air discharge)

– ±8 kV (contact discharge)

■ MIL STD883G-Method 3015-7

Applications

■ DVI ports up to 1.65 Gb/s

■ HDMI ports up to 1.65 Gb/s

■ IEEE 1394a, and b up to 1.6 Gb/s

■ USB 2.0 ports up to 480 Mb/s (high speed),

backwards compatible with USB 1.1 low and

full speed

■ Ethernet port: 10/100/1000 Mb/s

■ SIM card protection

■ Video line protection

Description

The DVIULC6-4SC6 is a monolithic, application

specific discrete device dedicated to ESD

protection of high speed interfaces, such as DVI,

HDMI, IEEE 1394a, and b, USB 2.0, Ethernet

links and video lines.

Its ultralow line capacitance secures a high level

of signal integrity without compromise in

protecting sensitive chips against the most

stringently characterized ESD strikes.

SOT23-6L

(JEDEC MO178AB)

www.st.com

Summary of content (12 pages)

PAGE 1
DVIULC6-4SC6 Ultralow capacitance ESD protection Datasheet  production data Features ■ 4-line ESD protection (IEC 61000-4-2) ■ Protects VBUS when applicable ■ Ultralow capacitance: 0.6 pF at 825 MHz ■ Fast response time compared with varistors ■ SOT23-6L package ■ RoHS compliant SOT23-6L (JEDEC MO178AB) Benefits Applications ■ ■ DVI ports up to 1.65 Gb/s ■ HDMI ports up to 1.65 Gb/s ■ IEEE 1394a, and b up to 1.6 Gb/s ■ USB 2.
PAGE 2
Characteristics 1 DVIULC6-4SC6 Characteristics Figure 1. Table 1.
PAGE 3
DVIULC6-4SC6 Figure 2. Characteristics Line capacitance versus line voltage (typical values) Figure 3. C(pF) Line capacitance versus frequency (typical values) C(pF) 1.0 1.0 F=825MHz Vosc=500mVRMS VBUS OPEN Tj =25 °C 0.9 0.8 0.7 Vosc=30mVRMS Tj =25°C VI-O/GND = 0V VBUS OPEN 0.9 0.8 0.7 0.6 0.6 0.5 CI/O - GND 0.5 0.4 0.4 0.3 0.3 0.2 CI/O - GND 0.2 0.1 CI/O - CI/O 0.1 Data line voltage (v) 0 F(MHz) 0 0.0 Figure 4. 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.
PAGE 4
Characteristics Figure 8. DVIULC6-4SC6 Analog crosstalk results 0.00 dB - 30.00 - 60.00 - 90.00 F (Hz) - 120.00 100.0k 4/12 1.0M 10.0M Doc ID 11599 Rev 4 100.0M 1.
PAGE 5
DVIULC6-4SC6 Application examples Figure 9.
PAGE 6
Technical information DVIULC6-4SC6 3 Technical information 3.1 Surge protection The DVIULC6-4SC6 is particularly optimized to perform ESD surge protection based on the rail to rail topology. The clamping voltage VCL can be calculated as follows: VCL+ = VBUS + VF, for positive surges VCL- = - VF, for negative surges with: VF = VT + Rd.
PAGE 7
DVIULC6-4SC6 3.3 Technical information How to ensure good ESD protection While the DVIULC6-4SC6 provides a high immunity to ESD surge, an efficient protection depends on the layout of the board. In the same way, with the rail to rail topology, the track from VBUS pin to the power supply +VCC, and from VBUS pin to GND pin must be as short as possible to avoid over voltages due to parasitic phenomena (see Figure 11 and Figure 12 for layout considerations). Figure 11.
PAGE 8
Technical information DVIULC6-4SC6 Figure 13. PCB layout considerations (VCC connection is application dependent) D+1 DVI 1 D-1 Connector VCC C = 100nF GND D+2 Side D-2 DVIULC6-4SC6 It’s often harder to connect the power supply near to the DVIULC6-4SC6 unlike the ground thanks to the ground plane that allows a short connection.
PAGE 9
DVIULC6-4SC6 Crosstalk behavior Figure 15. Crosstalk phenomena RG1 Line 1 VG1 α 1 VG1 + β12VG2 RL1 RG2 Line 2 VG2 α 2VG2 + β21VG1 RL2 DRIVERS RECEIVERS The crosstalk phenomena is due to the coupling between 2 lines. The coupling factor (12 or 21) increases when the gap across lines decreases, particularly in silicon dice. In the example above the expected signal on load RL2 is 2VG2, in fact the real voltage at this point has got an extra value 21VG1.
PAGE 10
Package information 4 DVIULC6-4SC6 Package information ● Epoxy meets UL94, V0 ● Lead-free packages In order to meet environmental requirements, ST offers these devices in different grades of ECOPACK® packages, depending on their level of environmental compliance. ECOPACK® specifications, grade definitions and product status are available at: www.st.com. ECOPACK® is an ST trademark. Table 3. SOT23-6L dimensions Dimensions Ref. Millimeters Inches Min. Typ. Max. c A1 q L H A E Min. Typ. Max.
PAGE 11
DVIULC6-4SC6 5 Ordering information Ordering information Table 4. 6 Ordering information Order code Marking Package Weight Base qty Delivery mode DVIULC6-4SC6 DL46 SOT23-6L 16.7 mg 3000 Tape and reel Revision history Table 5. Document revision history Date Revision Changes Aug-2005 1 First Issue. 09-Apr-2010 2 ECOPACK statement updated. Operating junction temperature range specified in Table 1. 14-Sep-2011 3 Added peak pulse power in Table 1.
PAGE 12
DVIULC6-4SC6 Please Read Carefully: Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST’s terms and conditions of sale.