* RoHS Directive 2002/95/EC Jan 27, 2003 including Annex.
** Bourns follows the prevailing definition of “halogen free” in the industry. Bourns considers a product to be “halogen free” if (a) the Bromine (Br) content is 900 ppm or less;
(b) the Chlorine (Cl) content is 900 ppm or less; and (c) the total Bromine (Br) and Chlorine (Cl) content is 1500 ppm or less.
Specifications are subject to change without notice.
Customers should verify actual device performance in their specific applications.
CD143A-SR2.8~3.3 – Steering/TVS Diode Array Series
Features
■RoHS compliant*
■Halogen free**
■ESD protection
■Protects 2 lines
■Low leakage current
■Low capacitance
Applications
■Ethernet - 10/100/1000 Base T
■Firewire and USB
■Portable electronics
■Video/Graphic Cards
General Information
Absolute Maximum Ratings (@ TA= 25 °C Unless Otherwise Noted)
Electrical and Thermal Characteristics (@ TA= 25 °C Unless Otherwise Noted)
Notes:
1. See Peak Pulse Power vs. Pulse Time.
2. From Pin 4 to Pin 1.
3. See Pulse Wave Form.
4. From Pin 1 to Pin 3, Pin 1 to Pin 2
The CD143A-SR2.8 and CD143A-SR3.3 devices provides ESD
protection for the external ports of portable electronic devices such
as cell phones, handheld electronics and personal computers.
The ESD protection provided by the component enables a data
port to withstand a minimum ±8 KV Contact / ±15 KV Air Discharge
per the ESD test method specified in IEC 61000-4-2. The device
measures 2.80 mm x 1.20 mm and is available in a SOT-143
package intended to be mounted directly onto an FR4 printed
circuit board.
The Bourns®device will meet IEC 61000-4-2 (ESD), IEC 61000-4-4
(EFT) and IEC 61000-4-5 (Surge) requirements.
Parameter Symbol Value Unit
Peak Pulse Power (tp= 8/20 µs)1PPP 200 W
Peak Pulse Current (tp= 8/20 µs) IPP 12 A
Operating Supply Voltage (Vdd - Gnd) Vdc 3.8 V
ESD per IEC 61000-4-2
(Air) Vesd ±30 kV
(Contact)
DC Voltage at any I/O Pin Vio (Gnd - 0.50) to (Vdd + 0.5) V
Operating Temperature TJ-55 ˚C to 125 ˚C ˚C
Storage Temperature TSTG -55 ˚C to 150 ˚C ˚C
1GND
I/O
REF
I/O2
4
3
Parameter Symbol CD143A-SR2.8 CD143A-SR3.3 Unit
Breakdown Voltage Minimum @ 2 µA 2VBR 3.0 3.5 V
Working Peak Voltage 2VWM 2.8 3.3 V
Snap-Back Voltage Minimum @ 50 mA VSB 2.8 3.3 V
Clamping Voltage Maximum @ IP= 1 A 2,3 VC5.0 7.0 V
Clamping Voltage Maximum @ IP2,3 VC8.5 @ 5 A 15 @ 10 A V
Reverse Leakage Current Maximum @ VWM 2IL5.0 uA
Forward Voltage Maximum @ 15 mA Vf1.0 V
Leakage Current @ VWM 4ID1.0 µA
Capacitance Typical @ 0 V, 1 MHz 4CJ4.5 pF
ESD Protection per IEC 61000-4-2
Minimum Contact Discharge ESD +/-8 kV
Minimum Air Discharge +/-15
EFT Protection per IEC 61000-4-4 @ 5/50ns EFT 40 A
Surge Protection per IEC 61000-4-5 @ 8/20µs Surge 12 A
*RoHS COMPLIANT
Specifications are subject to change without notice.
Customers should verify actual device performance in their specific applications.
CD143A-SR2.8~3.3 – Steering/TVS Diode Array Series
Product Dimensions
Recommended Pad Layout
B
D
I
K
E
G
H
F
J
C
A
MM
(INCHES)
DIMENSIONS:
1.90
(0.075)
1.70
(0.067)
1.20
(0.047)
0.80
(0.031)
0.85
(0.033)
0.85
(0.033)
0.85
(0.033)
1.05
(0.041)
1.90
(0.075)
2.75
(0.108)
2.85
(0.112)
MM
(INCHES)
DIMENSIONS:
Dimensions
A2.80 - 3.04
(0.110 - 0.12)
B1.78 - 2.03
(0.070 - 0.080)
C2.11 - 2.48
(0.083 - 0.098)
D1.20 - 1.39
(0.047 - 0.055)
E0.39 - 0.50
(0.015 - 0.020)
F0.79 - 0.93
(0.031 - 0.037)
G0.08 - 0.15
(0.003 - 0.006)
H0.46 - 0.60
(0.018 - 0.024)
I0.84 - 1.14
(0.033 - 0.045)
J0.72 - 0.83
(0.028 - 0.033)
K0.013 - 0.10
(0.0005 - 0.004)
This is a molded JEDEC SOT-143 device. It weighs approximately 35 mg and has a
flammability rating of UL 94V-0. The dimensions for the packaged device are shown below.
Block Diagram
1GND
I/O
REF
I/O2
4
3
This is the footprint recommended for this SOT-143 device. The device block diagram below includes the pin names and basic
electrical connections associated with each channel.
Typical Part Marking
CD143A-SR2.8 ..............................................................................2A
CD143A-SR3.3 ..............................................................................3A
Specifications are subject to change without notice.
Customers should verify actual device performance in their specific applications.
CD143A-SR2.8~3.3 – Steering/TVS Diode Array Series
Performance Graphs
Pulse Wave Form Clamping Voltage vs. Peak Pulse Current
0
1
2
3
4
5
6
41513
65 7 8 9 10 11 12 14
Forward Clamping Voltage (V)
Peak Pulse Current (A)
Waveform Parameters
tr = 8 µs
td = 20 µs
0
1
2
3
4
5
6
7
8
9
10
12
11
41513
65 7 8 9 10 11 12 14
Clamping Voltage (V)
Peak Pulse Current (A)
Waveform Parameters
tr = 8 µs
td = 20 µs
20
40
60
80
100
120
0
03025201510
5
IPP – Peak Pulse Current (% of IPP)
t – Time (µs)
Waveform Parameters
tt = 8 µs
td = 20 µs
tt
et
td = t|IPP/2
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.000 0.825 1.650 2.475 3.300
Capacitance (pF)
Input Voltage (V)
VDD = 3.3 V, GND = 0 V,
f = 1 MHz, T = 25 °C
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
0.000 0.825 1.650 2.475 3.300
Input Capacitance (pF)
Input Voltage (V)
VDD = 3.3 V, GND = 0 V,
f = 1 MHz, T = 25 °C
Forward Clamping Voltage vs. Peak Pulse Current
Typical Variation of CI/O-to-I/O vs. VIN
Typical Variation of CIN vs. VIN
How To Order
CD 143A - SR 2.8
Common Code
Chip Diode
Package
• 143A = SOT-143
Model
SR = Steering Diode Array
Repetitive Peak Reverse Voltage
2.8 = 2.8 VRWM (Volts)
3.3 = 3.3 VRWM (Volts)
Specifications are subject to change without notice.
Customers should verify actual device performance in their specific applications.
CD143A-SR2.8~3.3 – Steering/TVS Diode Array Series
Packaging Information
Asia-Pacific:
Tel: +886-2 2562-4117 • Fax: +886-2 2562-4116
Europe:
Tel: +41-41 768 5555 • Fax: +41-41 768 5510
The Americas:
Tel: +1-951 781-5500 • Fax: +1-951 781-5700
www.bourns.com
REV. 06/11
The surface mount product is packaged in an 8 mm x 4 mm tape and reel format per EIA-481 standard.
Item Symbol SOT-143
Carrier Width A2.75 ±0.10
(0.108 - 0.004)
Carrier Length B3.30 ±0.10
(0.130 - 0.004)
Carrier Depth C1.25 ±0.10
(0.049 - 0.004)
Sprocket Hole d1.55 ±0.05
(0.061 - 0.002)
Reel Outside Diameter D178
(7.008)
Reel Inner Diameter D150.0
(1.969) Min.
Feed Hole Diameter D213.0 ±0.20
(0.512 - 0.008)
Sprocket Hole Position E1.75 ±0.10
(0.069 - 0.004)
Punch Hole Position F3.50 ±0.05
(0.138 - 0.002)
Punch Hole Pitch P4.00 ±0.10
(0.157 - 0.004)
Sprocket Hole Pitch P04.00 ±0.10
(0.157 - 0.004)
Embossment Center P12.00 ±0.05
(0.079 - 0.002)
Overall Tape Thickness T0.20 ±0.10
(0.008 - 0.004)
Tape Width W8.00 ±0.20
(0.315 - 0.008)
Reel Width W114.4
(0.567) Max.
Quantity per Reel —3,000
.......
.......
....... ..............
....... ..............
PB
F
E
dT
120 °
D2
DD
1
W1
C
Index Hole
P
0
P
1
W
A
10 pitches (min.)
Direction of Feed
10 pitches (min.)
End
Trailer Device Leader
Start
MM
(INCHES)
DIMENSIONS:
