Document
05172
Only One Name Means ProTek’Tion™
ultra low capacitance steering diode array
SR70
SOT-143 package
Description
The SR70 is an ultra low capacitance steering diode array. Designed for protection against Electrostatic Discharge (ESD), Electrical Fast Transients (EFT) and secondary lightning threats, this device is ideal for use in high-speed signal interface application such as USB, microprocessor bus and mobile electronics.
The SR70 is capable of protecting one line pair or two single lines via the steering of transient voltage to power lines or ground. Its ultra low capacitance allows maintenance of signal integrity for high-speed data lines while protecting the circuit ICs from the damage of severe transients. An extremely low leakage current makes the SR70 suitable for battery powered devices and POE applications. The SR70 is available in the small SOT-143 package, which reduces internal lead inductance for low, overshoot voltage during fast front time transient events like ESD. This device meets the IEC 61000-4-2 and IEC 61000-4-4 requirements.
Features
• 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): 30A, 8/20µs - Level 2(Line-
Gnd) & Level 3 (Line-Line) • 225 Milliwatts Continuous Power Dissipation • Provides Two Lines of Protection • Low Leakage Current < 1.0µA • Ultra Low Capacitance: 3pF Typical • RoHS Compliant • REACH Compliant
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
applications
• USB Interface Ports • POE Applications • Video • Handheld Electronics • Laptops
PIN CONFIGURATION
V1 N
I/O 1 2
4V P
3 I/O 2
05172.R12 7/23
Page 1
ISO 9001 CERTIFIED COMPANY
05172
Only One Name Means ProTek’Tion™
typical device characteristics
SR70
MAXIMUM RATINGS @ 25°C Unless Otherwise Specified
PARAMETER
SYMBOL
Operating Temperature
TA
Storage Temperature
TSTG
Forward Peak Pulse Current (tp = 8/20µs)
IPP
VALUE -55 to 150 -55 to 150
30
UNITS °C °C A
ELECTRICAL CHARACTERISTICS PER LINE @ 25°C Unless Otherwise Specified
PART NUMBER
DEVICE MARKING
REPETITIVE PEAK
REVERSE VOLTAGE
VRRM VOLTS
minimum REVERSE breakdown voltage
I @ 50µA V(BR) VOLTS
MAXIMUM REVERSE LEAKAGE CURRENT
@ VRRM IR µA
MAXIMUM
FORWARD
CLAMPING
VOLTAGE
8/20µs
IPP @ 1A VFC
VOLTS
MAXIMUM
FORWARD
CLAMPING
VOLTAGE
8/20µs
IPP @ 30A VFC
VOLTS
SR70
PSA
70
85
1
1.5
8
notes 1. Measured between I/O pins to I/O pins.
maximum CAPACITANCE
(Note 1)
0V, 1MHz Cj pF 5
IPP - Peak Pulse Current - % of IPP
120 100
80 60 40 20
0 0
figure 1 pulse wave form
t f
Peak Value I PP
e-t
TEST WAVEFORM PARAMETERS t = 8µs
f
t = 20µs d
t = t/(I /2)
d
PP
5
10
15
20
25
30
t - Time - µs
05172.R12 7/23
Page 2
ISO 9001 CERTIFIED COMPANY
05172
SPICE MODEL
Only One Name Means ProTek’Tion™
VCC Lg 0.7nH LCRD
I/O LCRD
LCRD - Low Capacitance Rectifier Diode Lg - Lead Inductance
table 1 - spice parameters
parameter
unit
lcrd
BV
V
200
IBV
µA
0.01
Cjo
pF
5
IS
A
1E-13
Vj
V
0.6
M
-
0.33
N
-
1
RS
Ohms
0.31
TT
s
1E-8
EG
eV
1.11
SR70
05172.R12 7/23
Page 3
ISO 9001 CERTIFIED COMPANY
05172
Only One Name Means ProTek’Tion™
SOT-143 package information
outline dimensions
millimeters
dim
min
max
inches
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
NOTEs 1. Dimensioning and tolerances per ANSI Y14.M, 1985. 2. Controlling dimension: inches. 3. Dimensions are exclusive of mold flash and metal burrs.
A
G
L
BS
L1
F
D
C R
SR70
J K
pad layout dimensions
millimeters
dim
min
max
inches
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
NOTES 1. Controlling dimension: inches.
C
A
B D
E
F
05172.R12 7/23
Page 4
ISO 9001 CERTIFIED COMPANY
05172
TAPE AND REEL
Only One Name Means ProTek’Tion™
t
Top Cover Tape K0
D A0
P0 P2
10 Pitches Cumulative Tolerance on Tape. ± 0.2
E
Pin 1
F W
SR70
B0 P User Direction of Feed
Reel Dia. 178mm (7”)
Tape Width
8mm
A0 3.10 ± 0.10
specifications
B0
K0
D
E
F
W
P0
P2
P
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
Notes 1. Dimensions are in millimeters. 2. Surface mount product is taped and reeled in acc.