Si8410/20/21
S
I N G L E
& D
U A L
- C
H A N N E L
D
I G I TA L
I
S O L A T O R S
Features
High-speed operation
DC – 150 Mbps
2500 V
RMS
isolation
Transient Immunity
>25 kV/µs
Pin Assignments
Low propagation delay
<10 ns
Narrow Body SOIC
Si841x
V
DD1
A1
V
DD1
GND1
Wide Operating Supply Voltage:
2.375–5.5 V
Low power
I1 + I2 < 12 mA/channel at
100 Mbps
DC correct
No start-up initialization required
<10 µs Startup Time
High temperature operation
125 °C at 100 Mbps
100 °C at 150 Mbps
Precise timing
2 ns pulse width distortion
1 ns channel-channel matching
2 ns pulse width skew
1
2
3
4
Top View
8
7
6
5
V
DD2
GND2
B1
GND2
Narrow body SOIC-8 package
Si842x
V
DD1
A1
Applications
Isolated switch mode supplies
Isolated ADC, DAC
Motor control
Power factor correction systems
A2
GND1
1
2
3
4
Top View
8
7
6
5
V
DD2
B1
B2
GND2
Safety Regulatory Approvals
UL recognition:2500 Vrms for 1
Minute per UL1577
CSA component acceptance
notice
IEC certification conformity
IEC 60747-5-2
(VDE0884 Part 2)
Description
The Silicon Laboratories family of digital isolators are CMOS devices that
employ an RF coupler to transmit digital information across an isolation
barrier. Very high speed operation at low power levels is achieved. These
parts are available in an 8-pin narrow-body SOIC package. Three speed
grade options (1, 10, and 150 Mbps) are available and achieve typical
propagation delays of less than 10 ns.
Block Diagram
Si8410
Si8420
Si8421
A1
B1
A1
A2
B1
B2
A1
A2
B1
B2
Preliminary Rev. 0.1 5/07
Copyright © 2007 by Silicon Laboratories
Si8410/20/21
This information applies to a product under development. Its characteristics and specifications are subject to change without notice.
Si8410/20/21
2
Preliminary Rev. 0.1
Si8410/20/21
T
A B L E O F
C
O N T E N TS
Section
Page
1. Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
2. Typical Performance Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
3. Application Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
3.1. Theory of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
3.2. Eye Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
4. Layout Recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4.1. Supply Bypass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4.2. Input and Output Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
4.3. RF Radiated Emissions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
4.4. RF Immunity and Common Mode Transient Immunity . . . . . . . . . . . . . . . . . . . . . . . 22
5. Pin Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
6. Ordering Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
7. Package Outline: 8-Pin SOIC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Contact Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
Preliminary Rev. 0.1
3
Si8410/20/21
1. Electrical Specifications
Table 1. Electrical Characteristics
(V
DD1
= 5 V, V
DD2
= 5 V, T
A
= –40 to 125 ºC)
Parameter
High Level Input Voltage
Low Level Input Voltage
High Level Output Voltage
Low Level Output Voltage
Input Leakage Current
Si8410-A,-B,-C, V
DD1
Si8410-A,-B,-C, V
DD2
Si8410-A,-B,-C, V
DD1
Si8410-A,-B,-C, V
DD2
Si8420-A,-B,-C, V
DD1
Si8420-A,-B,-C, V
DD2
Si8420-A,-B,-C, V
DD1
Si8420-A,-B,-C, V
DD2
Si8421-A,-B,-C, V
DD1
Si8421-A,-B,-C, V
DD2
Si8421-A,-B,-C, V
DD1
Si8421-A,-B,-C, V
DD2
Si8410-B,-C, V
DD1
Si8410-B,-C, V
DD2
Si8420-B,-C, V
DD1
Si8420-B,-C, V
DD2
Si8421-B,-C, V
DD1
Si8421-B,-C, V
DD2
Si8410-C, V
DD1
Si8410-C, V
DD2
Si8420-C, V
DD1
Si8420-C, V
DD2
Si8421-C, V
DD1
Si8421-C, V
DD2
Symbol
V
IH
V
IL
V
OH
V
OL
I
L
Test Condition
Min
2.0
—
Typ
—
—
4.8
0.2
—
7
3
9
3
7
4
11
4
9
9
10
10
8
5
9
9
12
12
8
15
9
30
21
21
Max
—
0.8
—
0.4
±10
10
5
14
5
10
7
15
6
12
12
14
14
12
7
13
12
16
16
12
22
13
39
27
27
Unit
V
V
V
V
µA
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
loh = –4 mA
lol = 4 mA
V
DD1
,V
DD2
– 0.4
—
—
DC Supply Current
(All inputs 0 V or at Supply)
All inputs 0 DC
All inputs 0 DC
All inputs 1 DC
All inputs 1 DC
All inputs 0 DC
All inputs 0 DC
All inputs 1 DC
All inputs 1 DC
All inputs 0 DC
All inputs 0 DC
All inputs 1 DC
All inputs 1 DC
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
10 Mbps Supply Current
(All inputs = 5 MHz square wave, CI = 15 pF on all outputs)
100 Mbps Supply Current
(All inputs = 50 MHz square wave, CI = 15 pF on all outputs)
4
Preliminary Rev. 0.1
Si8410/20/21
Table 1. Electrical Characteristics (Continued)
(V
DD1
= 5 V, V
DD2
= 5 V, T
A
= –40 to 125 ºC)
Parameter
Symbol
Test Condition
Timing Characteristics
Si841x/2x-A
Min
Typ
Max
Unit
Maximum Data Rate
Minimum Pulse Width
Propagation Delay
Pulse Width Distortion
|t
PLH
- t
PHL
|
t
PHL
, t
PLH
PWD
t
PSK(P-P)
t
PSK
See Figure 1
See Figure 1
0
—
25
—
—
—
0
—
t
PHL
, t
PLH
PWD
t
PSK(P-P)
t
PSK
See Figure 1
See Figure 1
10
—
—
—
0
—
t
PHL
, t
PLH
PWD
t
PSK(P-P)
t
PSK
See Figure 1
See Figure 1
4
—
—
—
—
—
40
—
—
—
—
—
20
—
—
—
—
—
6.5
—
—
—
1
1000
75
30
50
40
10
100
35
7.5
25
5
150
6.6
9.5
3.5
5.5
3
Mbps
ns
ns
ns
ns
ns
Mbps
ns
ns
ns
ns
ns
Mbps
ns
ns
ns
ns
ns
Propagation Delay Skew
1
Channel-Channel Skew
Si841x/2x-B
Maximum Data Rate
Minimum Pulse Width
Propagation Delay
Pulse Width Distortion
|t
PLH
- t
PHL
|
Propagation Delay Skew
1
Channel-Channel Skew
Si841x/2x-C
Maximum Data Rate
Minimum Pulse Width
Propagation Delay
Pulse Width Distortion
|t
PLH
- t
PHL
|
Propagation Delay Skew
1
Channel-Channel Skew
Preliminary Rev. 0.1
5
