RClamp0544T

RClamp0544T
RailClamp
Ultra Low Capacitance TVS Arrays
PROTECTION PRODUCTS - RailClamp
Description
PRELIMINARY
Features
RailClamps are ultra low capacitance TVS arrays
designed to protect high speed data interfaces. This
series has been specifically designed to protect sensitive
components which are connected to high-speed data
and transmission lines from overvoltage caused by ESD
(electrostatic discharge), CDE (Cable Discharge Events),
and EFT (electrical fast transients).
The RClamp0544T has a typical capacitance of only
0.30pF between I/O pins. This allows it to be used on
circuits operating in excess of 3GHz without signal
attenuation. They may be used to meet the ESD
immunity requirements of IEC 61000-4-2,
Level 4 (±15kV air, ±8kV contact discharge). Each
device is designed to protect four lines (two differential
pairs).
The RClamp0544T is in a 8-pin, RoHS/WEEE compliant,
SLP2010P8T package. It measures 2.0 x 1.0 x 0.4mm.
The leads are spaced at a pitch of 0.4mm and are finished with lead-free NiPdAu. They are designed for easy
PCB layout by allowing the traces to run straight through
the device. The combination of small size, low capacitance, and high level of ESD protection makes them a
flexible solution for applications such as mini HDMI,
MDDI, USB, and eSATA interfaces.
‹ ESD protection for high-speed data lines to
‹
‹
‹
‹
‹
‹
‹
IEC 61000-4-2 (ESD) ±15kV (air), ±8kV (contact)
IEC 61000-4-5 (Lightning) 5A (8/20µs)
IEC 61000-4-4 (EFT) 40A (5/50ns)
Package design optimized for high speed lines
Flow-Through design
Protects four I/O lines
Low capacitance: 0.3pF typical (I/O to I/O)
Low clamping voltage
Low operating voltage: 5V
Solid-state silicon-avalanche technology
Mechanical Characteristics
‹
‹
‹
‹
‹
‹
SLP2010P8T 8-pin package (2.0 x 1.0 x 0.4mm)
RoHS/WEEE Compliant
Lead Pitch: 0.4mm
Lead finish: NiPdAu
Marking: Marking code + date code
Packaging: Tape and Reel
Applications
‹
‹
‹
‹
‹
‹
‹
Dimensions
Cell Phones and Accessories
Mini HDMI
MDDI Ports
USB
LVDS
eSATA
PCI Express
Circuit Diagram
2.00
1
2 GND 3
4
1.00
8
7
6
Pin 1
5
Pin 2
Pin 3
Pin 4
0.40 BSC
GND
0.40
Note: Pins 5-8 not internally connected
Nominal Dimensions in mm
Revision 7/28/2009
4-Line Protection
1
www.semtech.com
RClamp0544T
PRELIMINARY
PROTECTION PRODUCTS
Absolute Maximum Rating
R ating
Symbol
Value
Units
Peak Pulse Power (tp = 8/20µs)
Pp k
75
Watts
Peak Pulse Current (tp = 8/20µs)
IP P
5
A
ESD p er IEC 61000-4-2 (Air)
ESD p er IEC 61000-4-2 (Contact)
VESD
+/- 18
+/- 12
kV
TJ
-55 to +125
°C
TSTG
-55 to +150
°C
Op erating Temp erature
Storage Temp erature
Electrical Characteristics (T=25oC)
Parameter
Symbol
Conditions
Reverse Stand-Off Voltage
VRWM
Pin 1, 2, 3, or 4 to GN D
Reverse Breakdown Voltage
V BR
It = 1mA,
Pin 1, 2, 3, or 4 to GN D
Reverse Leakage Current
IR
VRWM = 5.0V,
Pin 1, 2, 3, or 4 to GN D
Clamp ing Voltage
VC
Clamp ing Voltage
Junction Cap acitance
 2009 Semtech Corp.
Maximum
Units
5
V
8
11
V
0.005
0.100
µA
IPP = 1A, tp = 8/20µs
Pin 1, 2, 3, or 4 to GN D
12
V
VC
IPP = 5A, tp = 8/20µs
Pin 1, 2, 3, or 4 to GN D
15
V
Cj
VR = 0V, f = 1MHz,
Pin 1, 2, 3, or 4 to GN D
0.7
0.80
pF
VR = 0V, f = 1MHz,
Between I/O p ins
0.3
0.4
pF
2
Minimum
6.5
Typical
www.semtech.com
RClamp0544T
PRELIMINARY
PROTECTION PRODUCTS
Typical Characteristics
Non-Repetitive Peak Pulse Power vs. Pulse Time
Pulse Waveform
110
Waveform
Parameters:
tr = 8µs
td = 20µs
100
10
Peak Pulse Power - P PP (kW)
90
PP
80
Percent of I
1
0.1
70
e-t
60
50
40
td = IPP/2
30
20
10
0
0.01
0.1
1
10
0
100
5
Pulse Duration - tp (us)
10
15
20
25
Time (µs)
Normalized Capacitance vs. Reverse Voltage
Clamping Voltage vs. Peak Pulse Current
25
2
f = 1MHz
1.8
20
1.6
Line to Line
1.4
15
10
CJ(VR) / CJ(VR=0)
Clamping Voltage -VC (V)
30
Line to Gnd
Waveform
Parameters:
tr = 8µs
td = 20µs
5
1
2
3
4
5
1
0.8
0.6
0.4
0.2
0
0
1.2
6
0
0
Peak Pulse Current - IPP (A)
ESD Clamping (Pin 1, 2, 3, or 4 to GND)
(+8kV Contact per IEC 61000-4-2)
1
2
3
Reverse Voltage - VR (V)
4
5
USB 2.0 Eye Pattern with RClamp0544T
Note: Data is taken with a 10x attenuator
 2009 Semtech Corp.
3
www.semtech.com
RClamp0544T
PRELIMINARY
PROTECTION PRODUCTS
Typical Characteristics (Con’t)
Insertion Loss S21 - I/O to I/O
CH1 S21
LOG
Insertion Loss S21 - I/O to GND
6 dB / REF 0 dB
CH1 S21
LOG
6 dB / REF 0 dB
1: -0.0715 dB
800 MHz
5
0 dB
12
3
1: -0.2214 dB
800 MHz
2: -0.0442 dB
900 MHz
12
3: -0.4690 dB
1.8 GHz
-6 dB
-12 dB
-12 dB
-24 dB
-30 dB
-30 dB
-36 dB
-36 dB
-42 dB
-42 dB
-48 dB
1
MHz
START. 030 MHz
10
MHz
100
MHz
-48 dB
3
1
GHz GHz
STOP 3 000. 000000 MHz
 2009 Semtech Corp.
1
MHz
START. 030 MHz
HDMI Eye Pattern (720p with RClamp0544T)
2: -0.2095 dB
900 MHz
4
4: -0.2029 dB
2.5 GHz
-18 dB
-24 dB
3
3: -0.6419 dB
1.8 GHz
-6 dB
4: -0.5150 dB
2.5 GHz
-18 dB
5
0 dB
4
10
MHz
100
MHz
3
1
GHz GHz
STOP 3 000. 000000 MHz
HDMI Eye Pattern (1080p with RClamp0544T)
4
www.semtech.com
RClamp0544T
PRELIMINARY
PROTECTION PRODUCTS
Applications Information
Design Recommendations for HDMI Protection
Adding external ESD protection to HDMI ports can be
challenging. First, ESD protection devices have an
inherent junction capacitance. When adding even a
small amount of capacitance, it will cause the
impedance of the differential pair to drop. Second,
large packages and land pattern requirements can
cause discontinuities that adversely affect signal
integrity. The RClamp0544T is specifically designed for
protection of high-speed interfaces, such as HDMI. It
presents <0.3pF capacitance between the pairs while
being rated to handle >±8kV ESD contact discharges
(>±15kV air discharge) as outlined in IEC 61000-4-2.
The device is in a leadless SLP package that is less
than 1.1mm wide. It is designed such that the traces
flow straight through the device. The narrow package
and flow-through design reduce discontinuities and
minimize impact on signal integrity. This becomes even
more critical as signal speeds increase.
Input 1 1
8
NC
Input 2 2
7
NC
GND
Input 3 3
6
NC
Input 4 4
5
NC
Figure 1 - SLP2010P8T Pin Configuration (Top View)
Pin
Identification
1, 2, 3, 4
Inp ut Lines
5, 6, 7, 8
Outp ut Lines
(N o Internal Connection)
Center Tab
Ground
Pin Configuration
Figure 2 is an example of how to route the high speed
differential traces through the RClamp0544T. The PCB
traces are used to connect the pin pairs for each line
(pin 1 to pin 8, pin 2 to pin 7, pin 3 to pin 6, pin 4 to
pin 5). For example, line 1 enters at pin 1 and exits at
Pin 8, and the PCB trace connects pin 1 and 8 together. This is true for lines connected at pins 2, 3,
and 4 also. Note that there are no internal connections to pins 5 - 8. Ground is connected at the center
tabs. One large ground pad should be used in lieu of
two separate pads.
TDR Measurements for HDMI
The combination of low capacitance, small package,
and flow-through design means it is possible to use
these devices to meet the HDMI impedance requirements of 100 Ohm ±15% without any PCB board
modification.
For signal integrity purposes, the best results will be
obtained by using the RClamp0544T to protect the
high-speed differential pairs. This is because the
device is designed such that the data lines from the
connector line up with the I/O pins of the device
without altering the trace routing.
 2009 Semtech Corp.
Figure 2 - Flow through Layout Using
RClamp0544T
5
www.semtech.com
RClamp0544T
PRELIMINARY
PROTECTION PRODUCTS
Applications Information
Data 2+
Data 2Data 1+
Data 1-
To HDMI
Graphics Chip
Data 0+
Data 0-Clk+
ClkRClamp0544T (3 Each)
CEC
SCL
SDA
HP Detect
5VPower
Gnd
Figure 3. HDMI Protection Example
Host Rx Host Rx +
B-
A-
Host Plug
A+
ESATA
Host Tx +
Host Tx -
B+
RClamp0544T
A+
Dev Rx +
Dev Rx -
ESATA Device
Plug
A-
B-
Dev Tx Dev Tx +
B+
-
RClamp0544T
Figure 4. eSA
TA Pr
o t ection Exam
ple
eSAT
Pro
Example
 2009 Semtech Corp.
6
www.semtech.com
RClamp0544T
PRELIMINARY
PROTECTION PRODUCTS
Applications Information
MDDI_Data0+
MDDI_Data0Gnd
MDDI Link
Controller
MDDI_Data1+
Gnd
MDDI Link
Controller
MDDI_Data1RClamp0544T
RClamp0544T
MDDI_Stb+
MDDI_StbGnd
Gnd
RClamp0522T
RClamp0522T
Host Pwr
HOST
Host Gnd
uClamp0501P
uClamp0501P
DISPLAY
Figure 5. MDDI Protection Example
 2009 Semtech Corp.
7
www.semtech.com
RClamp0544T
PRELIMINARY
PROTECTION PRODUCTS
Applications Information - Spice Model
RClamp0544T Spice Model
R Clamp0544T Spice Parameters
Parameter
Unit
D1
D2
D3
IS
Amp
1E-20
1E-20
2E-12
BV
Volt
100
100
8.2
VJ
Volt
0.83
0.83
0.6
RS
Ohm
1.5
0.6
0.2
IB V
Amp
1E-3
1E-3
1E-3
CJO
Farad
0.25E-12
0.25E-12
56E-12
TT
sec
2.541E-9
2.541E-9
2.541E-9
M
--
0.01
0.01
0.23
N
--
1.1
1.1
1.1
EG
eV
1.11
1.11
1.11
Note: Spice model is for simulating transient response only.
 2009 Semtech Corp.
8
www.semtech.com
RClamp0544T
PRELIMINARY
PROTECTION PRODUCTS
Outline Drawing - SO-8
Outline
SLP2010P8T
A
D
B
DIM
E
PIN 1
INDICATOR
(LASER MARK)
A
SEATING
PLANE
aaa C
A2
.015 .016 .017
0.00 .001 .002
(.005)
.006 .008 .010
.077 .079 .082
.037 .039 .043
.016 BSC
.013 .015 .017
8
.003
.004
0.37 0.40 0.43
0.00 0.02 0.05
(0.13)
0.15 0.20 0.25
1.95 2.00 2.08
0.95 1.00 1.08
0.40 BSC
0.32 0.38 0.43
8
0.08
0.10
C
A1
1
A
A1
A2
b
D
E
e
L
N
aaa
bbb
DIMENSIONS
INCHES
MILLIMETERS
MIN NOM MAX MIN NOM MAX
2
LxN
E/2
N
R 0.075
bxN
e
bbb
C A B
D/2
NOTES:
1. CONTROLLING DIMENSIONS ARE IN MILLIMETERS (ANGLES IN DEGREES).
Land Pattern - SLP2010P8T
(C)
G
DIM
C
G
P
X
Y
Z
Z
Y
P
DIMENSIONS
INCHES
MILLIMETERS
(.035)
(0.88)
0.21
.008
0.40
.016
.008
0.20
.026
0.67
.061
1.55
X
NOTES:
1. CONTROLLING DIMENSIONS ARE IN MILLIMETERS (ANGLES IN DEGREES).
2. THIS LAND PATTERN IS FOR REFERENCE PURPOSES ONLY.
CONSULT YOUR MANUFACTURING GROUP TO ENSURE YOUR
COMPANY'S MANUFACTURING GUIDELINES ARE MET.
 2009 Semtech Corp.
9
www.semtech.com
RClamp0544T
PRELIMINARY
PROTECTION PRODUCTS
Marking Codes
Ordering Information
0544T
PIN 1
INDICATOR
YYWW
Part Number
Qty per
Reel
R eel Size
RClamp0544T.TCT
3000
7 Inch
RailClamp and RClamp are marks of Semtech Corporation
YYWW = Date Code
Tape and Reel Specification
Pin 1 Location
User Direction of feed
Device Orientation in Tape
A0
1.21 +/-0.05 mm
B0
K0
2.21 +/-0.05 mm
Tape
Width
B, (Max)
D
8 mm
4.2 mm
1.5 + 0.1 mm
- 0.0 mm )
0.66 +/-0.05 mm
D1
E
0.5 mm
±0.05
1.750±.10
mm
F
K
(MAX)
P
P0
P2
T(MAX)
3.5±0.05
mm
2.4 mm
4.0±0.1
mm
4.0±0.1
mm
2.0±0.05
mm
0.4 mm
W
8.0 mm
+ 0.3 mm
- 0.1 mm
Contact Information
Semtech Corporation
Protection Products Division
200 Flynn Road, Camarillo, CA 93012
Phone: (805)498-2111 FAX (805)498-3804
 2009 Semtech Corp.
10
www.semtech.com