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SM14LCV1.7C [MICROSEMI]

SM14LV1.7C TVSarray⑩; SM14LV1.7C TVSarray ™
SM14LCV1.7C
型号： SM14LCV1.7C
厂家： Microsemi    Microsemi
描述：

SM14LV1.7C TVSarray⑩
SM14LV1.7C TVSarray ™

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文件： 总2页 (文件大小：284K)
中文：  中文翻译
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TITE  
LAMP  
SM14LV1.7C TVSarray™  
S C O T T S D A L E
 
D I V I S I O N  
FEATURES  
TITEClamp™ TVS SERIES  
•
•
•
•
•
ULTRA LOW CLAMP FOR SENSITIVE I/O PORTS  
Clamps voltage to 1.7V max above signal level  
Operates over range from 3V through 30V  
Protects 10 lines uni and bi-directional to voltage bus  
UL 94V-O Flammability Classification  
SO-14 Package  
APPLICATIONS  
•
RS-232-B  
RS-422-A  
RS-423-A  
RS-485  
•
•
•
MAXIMUM RATINGS  
•
•
•
•
•
•
•
•
Operating Temperature: -55°C to +50°C  
Storage Temperature: -55°C to +125°C  
Forward Surge Current: 8A (6/70µs)  
Minimum Reverse Breakdown Voltage ( VBR): 35V  
Working Peak Reverse Voltage VRWM to 30V  
Continuous forward current, IF: 400mA  
Power dissipation, (PD): 500mW  
Device Pin Out Configuration  
Derating factor: 4.0 mW/°C  
MECHANICAL  
PACKAGING  
•
•
•
•
Molded SOIC 14 PIN Surface Mount  
Weight 2.5 grams (approximate)  
Marking: Logo, Date Code  
Pin 1 defined by dot  
•
•
•
Tape & Reel per EIA Standard 481  
2,500 pieces per 13 inch reel (STANDARD)  
Carrier tube 50 pcs (OPTIONAL)  
ELECTRICAL CHARACTERISTICS PER LINE @ 25°C Unless otherwise specified  
VF  
VF(surge)  
@ IPP = 8 A  
6/70 µs  
CAP  
CAP  
CAP  
IR  
IR  
VBR  
VRWM  
@ IF  
@ 3V  
@10V  
@15V  
+25°c  
+50°c  
@100µA  
100mA  
PART  
DEVICE  
NUMBER  
MARKING  
VOLTS  
MIN  
VOLTS  
MAX  
pF  
TYP  
pF  
TYP  
pF  
TYP  
VOLTS  
MAX  
VOLTS  
MAX  
A
A
MAX @VR  
MAX @VR  
SM14LCV1.7C LV1.7C  
35  
30  
30  
20  
45  
30  
27  
0.5  
1.70  
200*  
500*  
* These values of leakage current IR represent multiple diodes as a result of their common anode or cathode connections.  
OUTLINE  
INCHES  
MIN  
MILLIMETERS  
DIM  
A
MAX  
0.344  
0.158  
0.244  
0.021  
0.010  
0.069  
0.010  
0.206  
0.050  
MIN  
8.53  
3.81  
5.79  
0.28  
0.10  
1.35  
0.15  
4.80  
0.41  
MAX  
8.74  
4.01  
6.19  
0.53  
0.20  
1.75  
0.25  
5.23  
1.27  
0.336  
0.150  
0.228  
0.011  
0.004  
0.053  
0.006  
0.189  
0.016  
B
C
E
F
G
H
J
K
Copyright 2001  
Microsemi  
MSCXXXX.PDF 9-20-2004 REV J  
Scottsdale Division  
8700 E. Thomas Rd. PO Box 1390, Scottsdale, AZ 85252 USA, (480) 941-6300, Fax: (480) 947-1503  
TITE  
LAMP  
SM14LV1.7C TVSarray™  
S C O T T S D A L E
 
D I V I S I O N  
Application Notes For Using The SM14LV1.7C  
TITEClampTM TVSarrayTM  
The SM14LV1.7C TITEClamp TVSarray is a 10 wire protector designed for clamping voltage spikes to lowest possible levels  
between the signal line and the Vcc supply or ground. This device incorporates Microsemi's proprietary "Self Programmable"  
feature that provides exceedingly tight clamping of only 1.7V maximum above signal line voltages ranging from 3.0V up  
through 30V. Destructive over-current is diverted through the plus and minus Vcc rails or ground for negative transients.  
One size fits all  
Downsizing of on chip components to sub-micron dimensions has improved performance, reduced component size and  
cost at the expense of lower failure voltage thresholds. The demand has surfaced for improved protection across data  
lines in highly automated manufacturing, monitoring and control systems. These environments are usually harsh and subject  
to conducted and induced transient voltages originating from sources including motors, solenoids and welders.  
The connection points are shown in figure 1. Pins 1 and 14 are connected to +Vcc, with pins 7 & 8 being either -Vcc or  
ground. The lines are spread out for purposes of illustrating the connections; however, the traces between signal lines and  
the TVS should be at an absolute minimum to reduce parasitic reluctance which causes overshoot per Faraday's laws of  
induction, V=L(di/dt). In figure 2, the segment for a single wire is detailed for improved illustration. A scaled illustration of  
clamping on a 12V signal line example is shown in figure 3. This depicts a small but acceptable rise in voltage above the  
signal during worse case transient conditions.  
+ Vcc  
Clamp Level  
1.7V Max  
12 V  
Signal Voltage  
1
3
5
To  
2
4
Signal  
V
Line  
+ VCC  
1
2
3
4
5
6
7
14  
13  
12  
11  
10  
9
t
- Vcc or Gnd  
T
ITE  
LAMP  
Clamp Performance  
Single Line Detail  
8
- VCC  
or Gnd  
Figure 3.  
Figure 2.  
6
8
7
9
10  
Line Installation  
Figure 1.  
Precautions in component placement and board layout:  
1. Place the SM14LV1.7C directly at the board/signal line interface.  
2. Keep all traces short for both signal lines and Vcc (and ground if applicable).  
3. Eliminate ground loops.  
If the reader has further technical questions, please contact Microsemi-Scottsdale applications engineering at 480-941-6433 or 480-941-6524.  
Copyright 2001  
Microsemi  
MSCXXXX.PDF 9-20-2004 REV J  
Scottsdale Division  
8700 E. Thomas Rd. PO Box 1390, Scottsdale, AZ 85252 USA, (480) 941-6300, Fax: (480) 947-1503  

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