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PROTECTION for the digital Computer and Consumer world

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Programmable clamping voltage. More data line integration per package. High power surge ... Low clamping voltage with its 12 V _at_ 1 A. High speed data rate ... – PowerPoint PPT presentation

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Title: PROTECTION for the digital Computer and Consumer world


1
PROTECTION for the digitalComputer and Consumer
world
Protection Solutions
September 2006
2
Content
  • Protection Overview
  • Low Capacitance ESD protection
  • Ultra Low Capacitance ESD protection
  • ESD Protection in micro packages

3
Need for ESD Protection
ICs to be protected against ESD strikes
4
Protection Topologies
5
High bit rate mapping
Sockets
Bit Rate Capacitance
ST solutions
3.2 Gb/s
HDMI1.3
e-SATA
SATAULC
IEEE1394c
HDMIULC
lt1 pF
1.65 Gb/s
HDMI1.1
DVIULC
DVI
800 Mb/s Scalable to 3.2 Gb/s
IEEE1394b
1-2 pF
USB2.0
USBLC6 DSILC6-4P6
480 Mb/s
3-5 pF
IEEE1394a
400 Mb/s
GigaBit Ethernet
DALC208
5-10 pF
USBxF
25 pF
USB1.1
12 Mb/s
Scart
10 Mb/s
50 pF
Computer
Consumer
6
Low Capacitance ESD protection family
7
Low Capacitance features and functions
  • Purpose
  • Efficient ESD protection (IEC 61000-4-2 Level 4 /
    15 kV ESD air discharge) with Very Low
    Capacitance (3 pF) to rising corded connectivity
    standards aimed to support high speed data rate.
  • With 2 different packages and 2 different
    topologies
  • 2 lines protection topology
  • USBLC6-2SC6/2P6
  • and a 4 lines protection device
  • USBLC6-4SC6 and DSILC6-4P6
  • standard and use-full SOT23-6L and space saving
    SOT-666 packages
  • Foot print / PCB area USBLC6-2SC6 compatible
    with USBLC6-4SC6
  • Foot print / PCB area USBLC6-2P6 compatible with
    DSILC6-4P6
  • Targeted functions
  • USB2.0
  • IEEE1394a
  • Ethernet 10/100

8
USB2.0 Application Schematic
2 ports / Desktop ? 4 data lines 1 Vbus to
protect (lt5.25 V) 1 port / Peripheral ? 2 data
lines 1 Vbus to protect (lt5.25 V)
Vbus
VBus
D
D
D-
D-
GND
Vbus
Gnd
HS capable device (Upstream)
LS/FS D
LS/FS D-
RPU-SW
HS capable Host (Downstream)
Vbus
DSILC6-4P6 USBLC6-4SC6
VBus
Vbus
VBus
D

D
D
D-
D-
D-
GND
GND
Gnd
15 k?
USB Connectors
USBLC6-2SC6
LS/FS D
LS/FS D
USBLC6-2P6
LS/FS D-
LS/FS D-
Zout45 ?
Printer
Desktop
9
Low Capacitance ESD Protection for high bit rates
All compliant with IEC 61000-4-2 level 4 (15 kV
air discharge, 8 kV contact)
10
Low Capacitance ESD Protection part numbering
USB LC 6 x yyy
Package SC6 SOT23-6L P6 SOT-666
Product Designation DA Diode Array USB
USB DSI Display Serial Interface
Number of line protected 2 2 lines 4 4 lines
Capacitance LC Low Capacitance
Breakdown Voltage 6 6 Volts
11
Ultra Low Capacitance ESD protection
12
Ultra Low Capacitance functions benefits
  • Function
  • 2 or 4 lines ESD ultra low capacitance
    protection 0.6 pF
  • VBUS ESD protection (if needed)
  • No signal distortion
  • EMI free layout
  • Suitable for high bit rate applications
  • Benefits
  • Full data integrity up to 3.2 Gb/s ready for
    next generation!
  • Best trade off cut-off frequency (capacitance
    value) for high bit rate without compromising ESD
    performances
  • IEC 61000-4-2 level 4 Compliant 15 kV air
    contact discharge
  • Packages

13
Ultra Low Capacitance features
  • High level of ESD protection
  • Exceed IEC 61000-4-2 with its 15 kV air and
    contact
  • Low clamping voltage with its 12 V _at_ 1 A
  • High speed data rate
  • 0.6 pF typ I/O to GND
  • to minimize attenuation _at_ high frequency in
    increasing available bandwidth while keeping full
    data signal integrity
  • 0.007 pF I/O to I/O variation
  • to minimize channels crosstalk and inter-pair
    skew
  • 0.015 pF I/O to GND variation
  • to minimize signal intra-pair skew and EMI and to
    optimize the channel matching
  • Tiny package
  • SOT-666 and µQFN 6 leads
  • for space saving solution
  • SATAULC6-2P6/2M6
  • for easier layout on board
  • Low leakage current
  • lt 0.5 µA to minimize channel losses

SATAULC6-2xx functional diagram
14
HDMI socket application schematic example
15
Ultra Low Capacitance ESD Protection for highest
bit rates
All compliant with IEC 61000-4-2 level 4 (15 kV
air discharge, 8 kV contact)
16
Ultra Low Capacitance ESD Protection part
numbering
HDMI ULC 6 x yyy
Package SC6 SOT23-6L P6 SOT-666 M6 Micro
QFN 6 leads
Product Designation HDMI High-Definition
Multimedia Interface DVI Digital Video
Interface SATA external Serial ATA
Number of line protected 2 2 lines 4 4 lines
Breakdown Voltage 6 6 Volts
Capacitance ULC Ultra Low Capacitance
17
Ultra Low Capacitance ESD protection added-values
Widest bandwidth on the market with 15 kV ESD
protection
Maximum frequency on HDMI TMDS line _at_ 800 MHz
Bandwidth higher than 5 GHz with 0.6 pF
line-capacitor
Maximized number of signal harmonics
Optimized signal integrity
18
Ultra Low Capacitance ESD protection added-values
Capacitance and Signal integrity
19
Ultra Low Capacitance ESD protection added-values
DC 0.007 pF Ultra-low impact on signal skew
mandatory
Minimized impact of HDMIULC6-4SC6 protection on
intra-pair skew (less than 5 ps) HDMI full
compliance
20
Ultra Low Capacitance ESD protection added-values
EYE diagram _at_ 1.65 Gb/S
  • DVI Capacitance influence on Signal integrity
  • Eye diagram at TMDS Transmitter and line
    capacitance influence _at_ 1.65 Gb/s

No device on the data line
DVIULC6-4SC6 ESD protection
Reduced impact on data integrity of line
capacitance
3.5 pF ESD protection
Damaged data signal due to line capacitance
21
Ultra Low Capacitance ESD protection added-values
EYE diagram _at_ 3.2 Gb/S
NO ESD PROTECTION
TRANSPARENT 15 kV ESD PROTECTION
lt1 pF
22
Ultra Low Capacitance ESD protection added-values
Advantages versus direct ST competitors
23
ESD Protection in Micro Packages
24
Micro Packages evolution
44 smaller area
35 smaller area
  • µQFN-6L 500µm pitch
  • Package size 1.45 x 1.0 mm
  • PCB area 1.45 mm²
  • z-height 0.55 mm

38 smaller area
  • Flip-Chip 500µm pitch
  • Package size 1.07 x 1.57 mm
  • PCB area 1.68 mm²
  • z-height 0.65 mm with bump
  • 0.6 mm after PCB report
  • SOT-663 / 665 / 666
  • Package size 1.6 x 1.6 mm
  • PCB area 2.6 mm²
  • z-height 0.55 mm
  • SOT323-5L or 6L
  • Package size 2.0 x 2.1 mm
  • PCB area 4.2 mm²
  • z-height 1.17 mm

25
SOT-66x ESDA Low Capacitance devices
All compliant with IEC 61000-4-2 level 4 (15 kV
air discharge, 8 kV contact)
26
Micro-QFN ESDA Low Capacitance devices
All compliant with IEC 61000-4-2 level 4 (15 kV
air discharge, 8 kV contact)
27
Micro packages ESD Protection part numbering
ESDA LC 6V1 x B yy
Package M2 SOD882 M3 SOT883 T2 Thin
SOD882 M6 micro-QFN 6 leads P3 SOT663 P5
SOT665 P6 SOT666
Product Designation ESDA ESD Array
Type B Bidirectional Blank Unidirectional
Capacitance LC Low Capacitance VLC Very Low
Capacitance
Number of line protected 1 1 line 5 5 lines
Breakdown Voltage 6V1 6.1 Volts min.
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