Features
■ Single device for two I/O lines
■ Low capacitance for high-speed CANbus
■ IEC 61000-4-2 30 kV ESD
■ IEC 61000-4-5 (Level 1, CWG 1.2/50)
500 V Surge
■ RoHS compliant*
■ AEC-Q101 compliant**
Applications
■ High-speed CANbus
■ Industrial control networks
■ Smart Distribution Systems (SDS)
■ DeviceNet™
■ Factory and process automation systems
Absolute Maximum Ratings (@ TA = 25 °C Unless Otherwise Noted)
CDSOT23-T24CAN-Q CANbus Protector
DeviceNet™ is a trademark of ODVA.
*RoHS Directive 2002/95/EC Jan. 27, 2003 including annex and RoHS Recast 2011/65/EU June 8, 2011.
**”Q” part number suffix indicates AEC-Q101 compliance.
General Information
The Model CDSOT23-T24CAN-Q device is designed to provide ESD and surge
protection for CAN transceivers, meeting IEC 61000-4-2 (ESD) and IEC 61000-4-5
Reverse Voltage of 24 V and a Minimum Breakdown Voltage of 26.2 V and can be used
with transceivers with internal circuitry for 24 V power supply miswiring. The low capac-
itance and low leakage current of the Model CDSOT23-T24CAN-Q minimizes impact
on signal integrity and is compatible with high-speed CAN.
The SOT-23 packaged device will mount directly onto the industry standard SOT-23
footprint. Its compact size eases layout on compact PCB designs while ensuring
compliance with stringent EMI requirements.
Rating Symbol Value Unit
VDRM 24 V
Non-Repetitive Peak Impulse Current, 8/20 μs Waveform IPPSM 8A
Non-Repetitive Peak Impulse Current, 1.2/50 μs Waveform IPPSM 6A
ESD (IEC 61000-4-2 Contact) 30 kV
Junction Temperature TJ-40 to +150 ˚C
Storage Temperature Tstg -55 to +150 ˚C
3
1
2
Electrical Characteristics (@ TA = 25 °C Unless Otherwise Noted)
Parameter Test Condition Min. Typ. Max. Unit
IDLeakage Current VD = VDRM 100 nA
VBR Breakdown Voltage IBR = 1 mA 26.2 32 V
VCClamping Voltage I = 5 A 8/20 μs waveform 36 V
VCClamping voltage I = 8 A 8/20 μs waveform 40 V
C Capacitance VD = 0 V, f = 1 MHz
Vosc = 1 Vrms
Line to GND (Pin 1-3 or Pin 2-3) 22 30
pF
Line to Line (Pin 1-2) 11
*RoHS & AEC COMPLIANT
WARNING Cancer and Reproductive Harm
www.P65Warnings.ca.gov
Specifications are subject to change without notice. Users should verify actual device performance in their specific
applications. The products described herein and this document are subject to specific legal disclaimers as set forth on the
last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.
3312 - 2 mm SMD Trimming Potentiometer
CDSOT23-T24CAN-Q CANbus Protector
Rating & Characteristic Curves
8/20 μs Pulse Waveform Clamping Voltage vs. Peak Pulse Current
Leakage Current vs. Temperature Breakdown Voltage vs. Temperature
20
40
60
80
100
120
0
30025201510
5
IPP – Peak Pulse Current (% of IPP)
t – Time (µs)
Test Waveform Parameters
tt = 8 µs
td = 20 µs
tt
et
td = t|IPP/2
0
3025 35 40 45
IPP - Peak Pulse Current (A)
VC - Clamping Voltage (V)
8
10
6
4
2
8/20 µs
Waveform
26
0
-30-60 6030 12090 150
VBR - Typical Breakdown Voltage (V)
Temperature (°C)
31
32
30
29
27
28
0.01
0
-30-60 6030 12090 150
ID - Typical Leakage Current (nA)
Temperature (°C)
0.1
10
1VD = 24 V
Specifications are subject to change without notice.
Users should verify actual device performance in their specific applications.
The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.
CDSOT23-T24CAN-Q CANbus Protector
Application Information
The Model CDSOT23-T24CAN-Q dual TVS diode array is designed to protect a CANbus transceiver against surge events per
IEC 61000-4-5 (Level 1), and also increase the resistibility against ESD events beyond IEC 61000-4-2 to as high as 30 kV. It is
intended to be used with a transceiver that has internal protection against other faults such as 24 V power supply miswiring. The
Model CDSOT23-T24CAN-Q is designed with a minimum breakdown voltage of 26.2 V so that it will not conduct during a 24 VDC
power cross event.
by the CDSOT23-T24CAN-Q device. The 1.2/50 s voltage, 8/20 s current combination wave generator is connected to the circuit
through two 80 ohm resistors and a coupling device (CD). This circuit was subjected to a 500 V (1.2/50) longitudinal surge
(common mode) in both positive and negative polarities per IEC 61000-4-5 (Level 1). The oscilloscope traces in Figures 1 and 2
show the clamp voltage with respect to ground for the CAN H and CAN L signal lines, as well as the total surge current output from
the surge generator into the circuit, for each of these surges. The peak current on each line is ~ 5.5 A (11 A total/2 lines) when
subjected to the 500 V (1.2/50) surge. The TVS diode clamps the voltage at the I/O of the transceiver within 37 V during the surge.
CANbus
Transceiver
CD
CD
-Q
Figure 1 -
CDSOT23-T24CAN-Q Clamp Voltages for a +500 V Surge
Figure 2 -
CDSOT23-T24CAN-Q Clamp Voltages for a -500 V Surge
Specifications are subject to change without notice.
Users should verify actual device performance in their specific applications.
The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.
CDSOT23-T24CAN-Q CANbus Protector
Layout Considerations
device should be placed as close to the bus connector as possible with short traces to the signal lines. Since the connector pin
spacing is generally much larger than the pin spacing of the transceiver, it is relatively easy to do this. A standard 10 mil, 1 ounce
copper trace is more than adequate to handle the peak current level from the 500 V surge discussed in the previous section. The
ground pin of the device should be connected to the circuit board ground plane using a short trace and a via. If there is a ground
plane on the signal side of the circuit board near where the diode array is placed, it should be connected directly to it.
CDSOT23-T24CAN-Q
Typical Part Marking How to Order
Q - NAC 42 T - 32TOS DC
Common Code
Chip Diode
Package
SOT23 = SOT-23-3L Package
Model
T = Transient Voltage Suppressor
Working Reverse Voltage
24 = 24 V
CAN = CANbus Protector
Q = AEC-Q101 Compliant
XX Y WW L
2-DIGIT PRODUCT CODE:
C2 = CDSOT23-T24CAN-Q
MANUFACTURING DATE CODE:
• 1ST DIGIT INDICATES THE YEAR.
• 2ND & 3RD DIGITS INDICATE THE WEEK NUMBER.
• 4TH DIGIT INDICATES THE LOT CODE.
(UNDERSCORE DENOTES
AEC-Q101 COMPLIANCY)
Moisture Sensitivity Level ................................................................1
............................................................. 3B
Specifications are subject to change without notice.
Users should verify actual device performance in their specific applications.
The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.
3312 - 2 mm SMD Trimming Potentiometer
Product Dimensions
CDSOT23-T24CAN-Q CANbus Protector
Recommended Footprint
Dimensions
A0.95
(0.037)
B0.95
(0.037)
C2.00
(0.079)
D0.85
(0.033)
E0.85
(0.033)
A B
C
E
D
MILLIMETERS
(INCHES)
DIMENSIONS =
12
3
B
CD
HL
0 ° TO 8 °
I
GAUGE
PLANE
K
J
SEATING PLANE
SEE
DETAIL
A
DETAIL
A
G
E
F
A
MILLIMETERS
(INCHES)
DIMENSIONS =
Dimensions
A2.74 - 3.00
(0.108 - 0.118)
B0.95 BSC
(0.037)...........
C1.20 - 1.40
(0.047 - 0.055)
D2.10 - 2.49
(0.083 - 0.098)
E1.90 BSC
(0.075)...........
F0.30 - 0.50
(0.012 - 0.019)
G0.89 - 1.17
(0.035 - 0.046)
H0.05 - 0.15
(0.002 - 0.006)
I0.25 BSC
(0.010)...........
J0.46 - 0.64
(0.018 - 0.025)
K0.40 - 0.58
(0.016 - 0.023)
L0.08 - 0.20
(0.003 - 0.008)
Specifications are subject to change without notice.
Users should verify actual device performance in their specific applications.
The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.
.......
.......
....... ..............
....... ..............
P A
F
ET
120 ϒ
D2
DD
1
W1
C
Index Hole
P
0
P
1
W
B
10 pitches (min.)
Direction of Feed
10 pitches (min.)
End
Trailer Device Leader
Start
d
CDSOT23-T24CAN-Q CANbus Protector
Packaging Information
The product is dispensed in tape and reel format (see diagram below).
Devices are packed in accordance with EIA standard
RS-481-A.
DIMENSIONS: MM
(INCHES)
Item Symbol SOT-23
Carrier Width A 2.25 ±0.10
(0.088 - 0.004)
Carrier Length B 2.34 ±0.10
(0.092 - 0.004)
Carrier Depth C 1.22 ±0.10
(0.048 - 0.004)
Sprocket Hole d 1.55 ±0.05
(0.061 - 0.002)
Reel Outside Diameter D 178
(7.008)
Reel Inner Diameter D1 50.0 ...
(1.969) Min.
Feed Hole Diameter D2 13.0 ± 0.20
(0.512 ± 0.008)
Sprocket Hole Position E 1.75 ± 0.10
(0.069 ± 0.004)
Punch Hole Position F 3.50 ± 0.05
(0.138 ± 0.002)
Punch Hole Pitch P 4.00 ±0.10
(0.157 - 0.004)
Sprocket Hole Pitch P0 4.00 ± 0.10
(0.157 ± 0.004)
Embossment Center P1 2.00 ± 0.05
(0.079 ± 0.002)
Overall Tape Thickness T 0.20 ± 0.10
(0.008 ± 0.004)
Tape Width W 8.00 ±0.20
(0.315 - 0.008)
Reel Width W1 14.4 .
(0.567) Max.
Quantity per Reel -- 3,000
REV. 11/18
Tel: +886-2 2562-4117
Email: asiacus@bourns.com
Europe:
Tel: +36 88 520 390
Email: eurocus@bourns.com
The Americas:
Tel: +1-951 781-5500
Email: americus@bourns.com
www.bourns.com
Specifications are subject to change without notice.
Users should verify actual device performance in their specific applications.
The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.
Legal Disclaimer Notice
This legal disclaimer applies to purchasers and users of Bourns® products manufactured by or on behalf of Bourns, Inc. and
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Unless otherwise expressly indicated in writing, Bourns® products and data sheets relating thereto are subject to change
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and complete before placing orders for Bourns® products.
The characteristics and parameters of a Bourns® product set forth in its data sheet are based on laboratory conditions, and
statements regarding the suitability of products for certain types of applications are based on Bourns’ knowledge of typical
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