SM712 Asymmetrical TVS Diode for Extended Common-Mode RS-485

SM712
Asymmetrical TVS Diode for Extended Common-Mode RS-485
FEATURES
SOT-23
● 400 watts peak pulse power (t p = 8/20µs)
● Transient protection for asymmetrical data lines to
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●
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●
IEC 61000-4-2 (ESD) ±15kV (air), ±8kV (contact)
IEC 61000-4-4 (EFT) 40A (5/50ns)
IEC 61000-4-5 (Lightning) 12A (8/20µs)
Protects two +12V to -7V lines
Low capacitance
Low clamping voltage
Solid-state silicon avalanche technology
APPLICATIONS
Pin Configuration
● Protection of RS-485 transceivers with extended
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●
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common-mode range
Security systems
Automatic Teller Machines
HFC systems
Networks
Absolute Maximum Rating (Tamb=25°C unless otherwise specified)
Rating
Symbol
Value
Units
Peak Pulse Power (tp = 8/20μs)
Ppk
400
Watts
Peak Pulse Current (tp = 8/20μs)
IPP
17
A
ESD per IEC 61000-4-2 (Air)
ESD per IEC 61000-4-2 (Contact)
VESD
15
8
kV
Lead Soldering Temperature
TL
260 (10 sec.)
℃
Operating Temperature
TJ
-55 to +125
℃
TSTG
-55 to +150
℃
Storage Temperature
SM712
Asymmetrical TVS Diode for Extended Common-Mode RS-485
● Electrical Characteristics(Tamb=25 °C )
Pins 1 to 3 and
2 to 3
(12V T VS)
Parameter
MI N
T YP
MAX
Pins 3 to 1 and
3 to 2
(7V T VS)
Symbo l
Conditions
MI N
T YP
Reverse Stand-Off Voltage
VRWM
Pin 3 to 1 or Pin 2 to 1
Reverse Breakdown Voltage
V BR
IPT = 1mA
Reverse Leakage Current
IR
VR = VRWM
1
20
µA
Clamp ing Voltage
VC
IPP = 5A,
tp = 8/20µs
20
10
V
Clamp ing Voltage
VC
IPP = 17A,
tp = 8/20µs
26
12
V
Junction Cap acitance
Cj
VR = 0V, f = 1MHz
75
75
pF
12
13.3
VR = VRWM, f = 1MHz
MAX
Units
7
V
7.5
45
V
45
pF
● Electrical Characteristics Curve
Peak Pulse Power VS Pulse Time
10,000
1,000
600W, 8/20µs Waveform
PPP
100
10
0.1
1
10
td
100
1,000
10,000
SM712
Asymmetrical TVS Diode for Extended Common-Mode RS-485
● Electrical Characteristics Curve
Capacitance vs. Reverse Voltage
Power Derating Curve
110
80
100
% of Rated Power or I PP
Capacitance - Cj (pF)
70
60
50
40
30
20
10
f = 1MHz
90
80
70
60
50
40
30
20
10
0
0
0
1
2
3
4
5
6
7
8
9
10
11
12
0
13
25
110
125
150
175
22
Clamping Voltage - V C (V)
90
80
Percent of I PP
100
24
W aveform
Parameters:
tr = 8µs
td = 20µs
100
e -t
60
50
40
75
Clamping Voltage vs. Peak Pulse Current
Pulse Waveform
70
50
Ambient Temperature - TA ( oC)
Reverse Voltage - V R (V)
td = IPP /2
30
20
10
20
18
Pin 1 to 3 and 2 to 3
16
14
12
10
Pin 3 to 1 and 3 to
8
6
Waveform
Parameters:
tr = 8µs
td = 20µs
4
2
0
0
0
5
10
15
T im e (µs)
20
25
30
0
2
4
6
8
10
Peak Pulse Current - IPP (A)
12
14
16
SM712
Asymmetrical TVS Diode for Extended Common-Mode RS-485
SOT-23 PACKAGE OUTLINE DIMENTION
1
e
L
L1
E
E1
θ
Symbol
A
A1
b
c
D
E
E1
e
L
L1
θ
Dimensions In Millimeters
Min
Typ
Max
1.00
1.40
0.10
0.35
0.50
0.10
0.20
2.70
2.90
3.10
1.40
1.60
2.40
2.80
1.90
0.10
0.30
0.40
0°
10°