sr12

05255
SR12
Only One Name Means ProTek’Tion™
500 WATT low capacitance steering diode/TVS array
Description
The SR12 is a low capacitance steering diode TVS array, designed to protect two I/O lines from the effects of Electrostatic Discharge (ESD) and Electrical Fast Transients (EFT). The SR12 provides ESD protection and has a peak pulse
power rating of 500 Watts for an 8/20µs waveshape.
The low capacitance of the steering diode allows the designer to protect high speed data applications. The small
SOT-143 package, with four leads reduces the internal lead inductance for low overshoot voltage during fast front time
transient events, such as ESD. The SR12 meets the IEC 61000-4-2 and IEC 61000-4-4 requirements.
SOT-143 package
Features
applications
• Compatible with IEC 61000-4-2 (ESD): Air - 15kV, Contact - 8kV
• Compatible with IEC 61000-4-4 (EFT): 40A - 5/50ns
• Compatible with IEC 61000-4-5 (Surge): 24A, 8/20µs - Level 2(LineGnd) & Level 3 (Line-Line)
• 500 Watts Peak Pulse Power per Line (tp = 8/20µs)
• Protects Two I/O Ports & Power Supply
• Low Capacitance: 10pF
• RoHS Compliant
• REACH Compliant
• Ethernet - 10/100/1000 Base T
• USB
• Wireless Communications
• FireWire
Mechanical characteristics
• Molded JEDEC SOT-143 Package
• Approximate Weight: 9 milligrams
• Lead-Free Pure-Tin Plating (Annealed)
• Solder Reflow Temperature:
Pure-Tin - Sn, 100: 260-270°C
• 8mm Tape and Reel Per EIA Standard 481
• Flammability Rating UL 94V-0
PIN CONFIGURATION
05255.R4 10/12
GND 1
4 REF
I/O 2
3 I/O
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05255
SR12
Only One Name Means ProTek’Tion™
typical device characteristics
MAXIMUM RATINGS @ 25°C Unless Otherwise Specified
PARAMETER
SYMBOL
VALUE
UNITS
TL
-55 to 150
°C
Storage Temperature
TSTG
-55 to 150
°C
Peak Pulse Power (tp = 8/20µs) - See Figure 1
PPP
500
Watts
Peak Forward Voltage - IF = 1A, 8/20µs
VF
1.5
Volts
Operating Temperature
ELECTRICAL CHARACTERISTICS PER LINE @ 25°C Unless Otherwise Specified
PART
NUMBER
SR12
DEVICE
MARKING
12A
RATED
STAND-OFF
VOLTAGE
MINIMUM
BREAKDOWN
VOLTAGE
MAXIMUM
CLAMPING
VOLTAGE
(Fig. 2)
MAXIMUM
CLAMPING
VOLTAGE
(Fig. 2)
MAXIMUM
LEAKAGE
CURRENT
VWM
VOLTS
@ 1mA
V(BR)
VOLTS
@ IP = 1A
VC
VOLTS
@ 8/20µs
VC @ I PP
VOLTS
@ vwm
ID
µA
MAXIMUM
CAPACITANCE
PER LINE
(Note 1)
(Fig. 5)
0V, 1MHz
C j(SD)
pF
12.0
13.3
19.0
30.0V @ 16.0A
1
10
notes
1. As shown in Figure 5, REF 1 is connected to ground, REF 2 is connected to +VCC and input applies to VCC = 12V, VSIGN = 30mV, F = 1MHz.
05255.R4 10/12
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05255
SR12
Only One Name Means ProTek’Tion™
typical device characteristics
figure 1
peak pulse power vs pulse time
PPP - Peak Pulse Power - Watts
10,000
1,000
500W, 8/20µs Waveform
100
10
0.1
10
100
td - Pulse Duration - µs
Peak Value IPP
80
100
TEST
WAVEFORM
PARAMETERS
tf = 8µs
td = 20µs
e-t
60
40
10,000
figure 3
power derating curve
Peak Pulse Power
8/20µs
80
% Of Rated Power
tf
100
td = t/(IPP/2)
60
40
20
20
0
1,000
figure 2
pulse wave form
120
IPP - Peak Pulse Current - % of IPP
1
0
05255.R4 10/12
5
10
15
t - Time - µs
20
25
0
30
Page 3
Average Power
0
25
50
75 100 125
TA - Ambient Temperature - °C
150
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05255
SR12
Only One Name Means ProTek’Tion™
typical device characteristics
figure 4
overshoot & clamping voltage
20
5 Volts per Division
10
0
-10
-20
ESD Test Pulse - 5 kilovolt, 1/30ns (Waveshape)
figure 5
INPUT CAPACITANCE CIRCUIT
REF2
I/O
+VCC
VSIGN G
REF1
figure 6
typical reverse voltage vs capacitance
16
C - Capacitance - pF
12
8
4
0
05255.R4 10/12
0
1
2
3
VR - Reverse Voltage - Volts
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4
5
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05255
SR12
Only One Name Means ProTek’Tion™
application information
VBus
1
4
2
3
VBus
USB
PORT
USB
CONTROLLER
D+
D-
VBus
D+
D-
USB
PORT
3
2
VBus
4
1
figure 1 - USB Protection
Two SR12s (Unidirectional) in a Common-Mode configuration. Circuit connectivity is as follows:
• Pins 2 and 3 are connected to the datalines
• Pin 1 is connected to ground
• Pin 4 is connected to the databus
circuit board recommendations
Circuit board layout is critical for electromagnetic compatibility protection. The following guidelines are recommended:
• The protection device should be placed near the input terminals or connectors, the device will divert the transient current
immediately before it can be coupled into the nearby traces.
• The path length between the TVS device and the protected line should be minimized.
• All conductive loops including power and ground loops should be minimized.
• The transient current return path to ground should be kept as short as possible to reduce parasitic inductance.
• Ground planes should be used whenever possible. For multilayer PCBs, use ground vias.
05255.R4 10/12
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05255
SR12
Only One Name Means ProTek’Tion™
SOT-143 package information
A
outline dimensions
dim
millimeters
inches
min
max
min
max
A
2.80
3.04
0.110
0.120
B
1.20
1.39
0.047
0.055
C
0.84
1.14
0.033
0.045
D
0.39
0.50
0.015
0.020
F
0.79
0.93
0.031
0.037
G
1.78
2.03
0.070
0.080
J
0.08
0.15
0.003
0.006
K
0.46
0.60
0.018
0.024
L
0.445
0.60
0.0175
0.024
L1
0.40
0.60
0.016
0.024
R
0.72
0.83
0.028
0.033
S
2.11
2.48
0.083
0.098
L
G
B S
J
K
L1
F
D
H
C
R
NOTEs
1. Dimensioning and tolerances per ANSI Y14.M, 1985.
2. Controlling dimension: inches.
3. Dimensions are exclusive of mold flash and metal burrs.
pad layout dimensions
dim
millimeters
A
C
inches
min
max
min
max
A
1.88
2.13
0.074
0.084
B
1.80
2.06
0.071
0.081
C
0.71
0.97
0.028
0.038
D
0.76
1.02
0.030
0.040
E
1.07
1.32
0.042
0.052
F
0.71
0.97
0.028
0.038
B
D
E
F
NOTES
1. Controlling dimension: inches.
05255.R4 10/12
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05255
SR12
Only One Name Means ProTek’Tion™
TAPE AND REEL
P0
t
10 Pitches Cumulative
Tolerance on Tape. ± 0.2
P2
D
E
Top Cover Tape
Pin 1
A0
F
W
K0
B0
P
User Direction of Feed
specifications
Reel Dia.
Tape
Width
178mm (7”)
8mm
A0
B0
K0
D
E
F
W
P0
P2
P
3.10 ± 0.10 2.70 ± 0.10 1.35 ± 0.10 1.50 ± 0.10 1.75 ± 0.10 3.50 ± 0.05 8.00 ± 0.30 4.00 ± 0.10 2.00 ± 0.05 4.00 ± 0.10
tmax
0.25
Notes
1.
2.
3.
4.
5.
Dimensions are in millimeters.
Surface mount product is taped and reeled in accordance with EIA-481.
Suffix - T7 = 7” Reel - 3,000 pieces per 8mm tape.
Suffix - T13 = 13” Reel - 10,000 pieces per 8mm tape.
Marking on Part - marking code (see page 2) and date code.
Package outline, pad layout and tape specifications per document number 06011.R4 8/10.
ORDERING INFORMATION
base PART NUMBER
LEADFREE SUFFIX
TAPE SUFFIX
QTY/REEL
REEL SIZE
TUBE qty
SR12
-LF
-T7
3000
7”
n/a
SR12
-LF
-T13
10,000
13”
n/a
This device is only available in a Lead-Free configuration.
05255.R4 10/12
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05255
SR12
Only One Name Means ProTek’Tion™
company information
COMPANY PROFILE
In business more than 20 years, ProTek Devices™ is a privately-held company located in Tempe, Arizona, that offers a product line of transient voltage suppressors (TVS); avalanche breakdown diodes; steering diode TVS arrays and other surge suppressor component products.
These TVS devices protect electronic systems from the effects of lightning, electrostatic discharge (ESD), nuclear electromagnetic pulses
(NEMP), inductive switching and EMI / RFI. ProTek Devices also offers high performance interface and linear products that include analog
switches; multiplexers; LED drivers; audio control ICs; RF and related high frequency products. The analog devices work in a host of consumer; industrial; automotive and other applications.
CONTACT US
Corporate Headquarters
2929 South Fair Lane
Tempe, Arizona 85282
USA
By Telephone
General: 602-431-8101
Sales: & Marketing: 602-414-5109
Customer Service: 602-414-5114
Product Technical Support: 602-414-5107
By Fax
General: 602-431-2288
By E-mail:
Sales: [email protected]
Customer Service: [email protected]
Technical Support: [email protected]
ProTek Devices (Asia Pacific) Pte. Ltd.
8 Ubi Road 2, #06-19
Zervex
Singapore - 408538
Tel: +65-67488312
Fax: +65-67488313
Web
www.protekdevices.com
COPYRIGHT © ProTek Devices 2002 - This literature is subject to all applicable copyright laws and is not for resale in any manner.
SPECIFICATIONS: ProTek reserves the right to change the electrical and or mechanical characteristics described herein without notice.
DESIGN CHANGES: ProTek reserves the right to discontinue product lines without notice and that the final judgement concerning selection and specifications is the buyer’s and that in furnishing engineering
and technical assistance. ProTek assumes no responsibility with respect to the selection or specifications of such products. ProTek makes no warranty, representation or guarantee regarding the suitability of
its products for any particular purpose, nor does ProTek assume any liability arising out of the application or use of any product or circuit and specifically disclaims any and all liability without limitation special,
consequential or incidental damages.
LIFE SUPPORT POLICY: ProTek Devices products are not authorized for use in life support systems without written consent from the factory.
05255.R4 10/12
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