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July 2006 Rev 2 1/11

HDMIULC6-4SC6

Ultra large bandwidth ESD protection

Main applications

■ HDMI ports at 1.65 Gb/s and up to 3.2 Gb/s

■ IEEE 1394a, b, or c up to 3.2 Gb/s

■ USB 2.0 ports up to 480 Mb/s (Hi-Speed)

■ Ethernet port: 10/100/1000 Mb/s

■ Video line protection

Description

The HDMIULC6-4SC6 is a monolithic, application

specific discrete device dedicated to ESD

protection of the HDMI connection. It also offers

the same high level of protection for IEEE 1394a

and IEEE 1394b/c, USB 2.0, Ethernet links, and

video lines.

Its ultra high cutoff frequency (5.3 GHz) secures a

high level of signal integrity. The device topology

provides this integrity without compromising the

complete protection of ICs against the most

stringent ESD strikes.

Features

■ 4 line 15 kV ESD protection

■ Protects V

BUS

when applicable

■ Ultra high bandwidth - no inluence on signal

rise and fall times - maximised number of signal

harmonics

■ Very low leakage current: 0.5 µA max.

■ Fast response time compared with varistors

■ SOT23-6L package

■ RoHS compliant

Complies with these standards:

■ IEC 61000-4-2 level 4

– 15 kV air discharge

– 8 kV (and up to 15 kV) contact discharge

Functional diagram

Benefits

■ ESD standards compliance guaranteed at

device level, hence greater immunity at system

level

■ ESD protection of V

BUS

when applicable.

■ High efficiency due to low residual voltage

when confronted by an ESD surge

■ Minimized rise and fall times for maximum data

integrity

■ Consistent D+ / D- signal balance:

– Ultra low impact on intra-, inter-pair skew

– Matching high bit rate HDMI requirements

and ready for future evolution

■ Low PCB space occupation - 9 mm² maximum

foot print

■ Low leakage current for longer operation of

battery powered devices

■ Higher reliability offered by monolithic

integration

Order code

Part Number Marking

HDMIULC6-4SC6 DL46

SOT23-6L

(JEDEC MO178AB)

I/O1 I/O4

GND V

BUS

I/O2 I/O3

When used with an HDMI

application, Pin 5 should not

be connected to protect

against backdrive current flow.

www.st.com

Summary of content (11 pages)

PAGE 1
HDMIULC6-4SC6 Ultra large bandwidth ESD protection Main applications ■ HDMI ports at 1.65 Gb/s and up to 3.2 Gb/s ■ IEEE 1394a, b, or c up to 3.2 Gb/s ■ USB 2.0 ports up to 480 Mb/s (Hi-Speed) ■ Ethernet port: 10/100/1000 Mb/s ■ Video line protection SOT23-6L (JEDEC MO178AB) Functional diagram Description The HDMIULC6-4SC6 is a monolithic, application specific discrete device dedicated to ESD protection of the HDMI connection.
PAGE 2
Characteristics 1 HDMIULC6-4SC6 Characteristics Table 1. Absolute ratings Symbol Parameter VPP Peak pulse voltage Tstg Storage temperature range Value Unit ±15 ±15 ±25 kV -55 to +150 °C IEC 61000-4-2 air discharge IEC 61000-4-2 contact discharge MIL STD883C-Method 3015-6 Tj Maximum junction temperature 125 °C TL Lead solder temperature (10 seconds duration) 260 °C Table 2. Electrical characteristics (Tamb = 25° C) Value Symbol Parameter Test Conditions Unit Min.
PAGE 3
HDMIULC6-4SC6 Figure 1. Characteristics Line capacitance versus line voltage (typical values) Figure 2. C(pF) C(pF) 1.0 1.0 F=825MHz Vosc=500mVRMS VBUS OPEN Tj =25 °C 0.9 0.8 Vosc=30mVRMS Tj =25°C VI-O/GND = 0V VBUS OPEN 0.9 0.8 0.7 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 3. Line capacitance versus frequency (typical values) 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.
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Application examples 2 HDMIULC6-4SC6 Application examples Figure 5.
PAGE 5
HDMIULC6-4SC6 2.1 Application examples PCB layout considerations For HDMI applications, VCC should not be connected. In this case the capacitor C in Figure 7. is not needed. Figure 7. PCB layout considerations (VCC connection is application dependent) HDMI Connector D+1 1 D-1 VCC GND C = 100 nF D+2 Side D-2 HDMIULC6-4SC6 A differential impedance of 100 Ω must be respected in the layout. Both lines of the differential pair should have the same length. Figure 8.
PAGE 6
Technical information HDMIULC6-4SC6 3 Technical information 3.1 Surge protection The HDMIULC6-4SC6 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+ = VTRANSIL + VF for positive surges VCL- = - VF for negative surges with: VF = VT + Rd.Ip (VF forward drop voltage) / (VT forward drop threshold voltage) and VTRANSIL = VBR + Rd_TRANSIL .
PAGE 7
HDMIULC6-4SC6 Technical information It’s the reason why some recommendations have to be followed (see Section 3.3: How to ensure good ESD protection). Figure 9.
PAGE 8
Technical information HDMIULC6-4SC6 Figure 12. Remaining voltage after the HDMIULC6-4SC6 during positive ESD surge Note: Figure 13. Remaining voltage after the HDMIULC6-4SC6 during negative ESD surge The measurements have been done with the HDMIULC6-4SC6 in open circuit. IMPORTANT: An important precaution to take is to put the protection device as close as possible to the disturbance source (generally the connector). 3.4 Crosstalk behavior Figure 14.
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HDMIULC6-4SC6 Technical information Figure 15. Analog crosstalk measurements TEST BOARD NETWORK ANALYSER PORT 2 NETWORK ANALYSER PORT 1 Vbus Figure 15 gives the measurement circuit for the analog application. In usual frequency range of analog signals (up to 240 MHz) the effect on disturbed line is less than -45 dB (see Figure 16). Figure 16. Analog crosstalk results 0.00 dB - 30.00 - 60.00 - 90.00 F (Hz) - 120.00 100.0k 1.0M 10.0M 100.0M 1.
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Package information 4 HDMIULC6-4SC6 Package information Table 3. SOT23-6L dimensions DIMENSIONS REF. Millimeters Min. Typ. Max. Inches Min. Typ. Max. E e b 0.90 1.45 0.035 0.057 A1 0 0.10 0.004 A2 0.90 1.30 0.035 0.051 b 0.35 0.50 0.014 0.02 c 0.09 0.20 0.004 0.008 D 2.80 3.05 0.110 0.120 E 1.50 1.75 0.059 0.069 0 D e A2 c A e A1 θ L H 0.95 0.037 H 2.60 3.00 0.102 0.118 L 0.10 0.60 0.004 0.
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HDMIULC6-4SC6 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.