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ASM18C  
2-Line Bi-directional TVS Diode Array  
Description  
Mechanical Characteristics  
The ASM18C is a Bi-directional TVS diode array, utilizing  
leading monolithic silicon technology to provide fast re-  
sponse time and low ESD clamping voltage, making this  
device an ideal solution for protecting sensitive semicon-  
ductor components from damage. The ASM18C complies  
with the IEC 61000-4-2 (ESD) with ±30kV air and ±30kV  
contact discharge. It is assembled into a lead-free SOT-  
23 package. It is designed to protect components which  
are connected to data and transmission lines from volt-  
age surges.  
Package: SOT-23  
Lead Finish: Matte Tin  
Case Material: “Green” Molding Compound.  
Terminal Connections: See Diagram Below  
Marking Information: See Below  
Applications  
Cellular Handsets and Accessories  
Notebooks and Handhelds  
Portable Instrumentation  
Set Top Box  
Features  
Industrial Controls  
Ultra low leakage: nA level  
Operating voltage: 18V  
Server and Desktop PC  
Low clamping voltage  
Marking Information  
Complies with following standards:  
– IEC 61000-4-2 (ESD) immunity test  
Air discharge: ±30kV  
Contact discharge: ±30kV  
3
– IEC61000-4-5 (Lightning) 8A (8/20μs)  
RoHS Compliant  
18C  
1
2
Ordering Information  
Dimensions and Pin Configuration  
Part Number  
Packaging  
3000/Tape & Reel  
Reel Size  
ASM18C  
7 inch  
Circuit and Pin Schematic  
Revision_1.0  
1 of 5  
www.appliedpowermicro.com  
ASM18C  
Absolute Maximum Ratings (TA=25°C unless otherwise specified)  
Parameter  
Symbol  
Value  
Unit  
Peak Pulse Power (8/20µs)  
Ppk  
280  
W
Peak Pulse Current (8/20µs)  
IPP  
8
A
ESD per IEC 61000−4−2 (Air)  
±30  
±30  
VESD  
kV  
ESD per IEC 61000−4−2 (Contact)  
Operating Temperature Range  
Storage Temperature Range  
TJ  
−55 to +125  
−55 to +150  
°C  
°C  
Tstg  
Electrical Characteristics (TA=25°C unless otherwise specified)  
ASM18C  
Parameter  
Symbol Min  
Typ  
Max  
Unit Test Condition  
Reverse Working Voltage  
VRWM  
18  
V
Breakdown Voltage  
Reverse Leakage Current  
Clamping Voltage  
VBR  
IR  
20  
V
μA  
V
IT = 1mA  
0.2  
26  
35  
VRWM = 18V  
VC  
VC  
IPP = 1A (8 x 20µs pulse)  
IPP = 8A (8 x 20µs pulse)  
Clamping Voltage  
V
VR = 0V, f = 1MHz, Pin 1 to Pin 3  
or Pin 2 to Pin 3  
Junction Capacitance  
Junction Capacitance  
CJ  
CJ  
25  
12  
pF  
pF  
VR = 0V, f = 1MHz, Pin 1 to Pin 2  
Revision_1.0  
2 of 5  
www.appliedpowermicro.com  
ASM18C  
Typical Performance Characteristics (TA=25°C unless otherwise Specified)  
Peak Pulse Power vs. Pulse Time  
Junction Capacitance vs. Reverse Voltage  
Power Derating Curve  
Clamping Voltage vs. Peak Pulse Current  
ESD Clamping Voltage  
8 X 20μs Pulse Waveform  
8 kV Contact per IEC61000−4−2  
Revision_1.0  
3 of 5  
www.appliedpowermicro.com  
ASM18C  
SOT-23 Package Outline Drawing  
DIMENSIONS  
MILLIMETERS  
INCHES  
NOM  
- -  
SYM  
MIN  
0.90  
0.00  
0.90  
0.30  
0.08  
2.80  
1.20  
NOM  
- -  
MAX  
MIN  
MAX  
0.045  
0.004  
0.041  
0.020  
0.006  
0.118  
0.055  
A
A1  
A2  
b
1.15  
0.10  
1.05  
0.50  
0.15  
3.00  
1.40  
0.035  
0.000  
0.035  
0.012  
0.003  
0.110  
0.047  
- -  
- -  
- -  
- -  
- -  
- -  
- -  
- -  
- -  
c
- -  
D
- -  
E
- -  
E1  
e
2.25  
- -  
0.95TYP  
- -  
2.55  
0.089  
0.100  
0.037TYP  
e1  
L
1.80  
2.00  
0.071  
- -  
0.022REF  
- -  
0.079  
0.55REF  
- -  
L1  
Θ
0.30  
0.50  
0.012  
0.020  
- -  
- -  
0°  
8°  
0°  
8°  
Revision_1.0  
4 of 5  
www.appliedpowermicro.com  
ASM18C  
Suggested Land Pattern  
DIMENSIONS  
INCHES MILLIMETERS  
SYM  
C
E
.087  
.037  
.075  
.031  
.039  
.055  
.141  
2.20  
0.95  
1.90  
0.80  
1.00  
1.40  
3.60  
E1  
G
X
Y
Z
Contact Information  
Applied Power Microelectronics Inc.  
Website: http://www.appliedpowermicro.com  
Email: sales@appliedpowermicro.com  
Phone: +86 (0519) 8399 3606  
Applied Power Microelectronics Inc. (APM) reserves the right to make changes to the product specification and data in this document without notice. APM makes no warranty, representation or  
guarantee regarding the suitability of its products for any particular purpose, nor does APM assume any liability arising from the application or use of any products or circuits, and specifically dis-  
claims any and all liability, including without limitation special, consequential or incidental damages.  
Revision_1.0  
5 of 5  
www.appliedpowermicro.com