Si8410/20/21
U
LT RA
L
OW
P
O W E R
S
I N G L E
& D
U A L
- C
H A N N E L
D
IG I TA L
I
S O L A T O R S
Features
Pin Assignments
High-speed operation
DC
Precise timing
2
– 150 Mbps
ns typical
Low propagation delay
<10
ns pulse width distortion
1 ns channel-channel matching
2 ns pulse width skew
Narrow Body SOIC
Si841x
V
DD1
A1
V
DD1
GND1
Wide Operating Supply Voltage:
Up to 2500 V
RMS
isolation
2.75–5.5 V
Transient Immunity
Ultra low power
25 kV/µs
5 V Operation:
DC correct
I< 1.25 mA per channel at 1 Mbps
No start-up initialization required
I< 2 mA per channel at 10 Mbps
<30 µs startup time
I< 6 mA per channel at 100 Mbps
High temperature operation
2.75 V Operation:
125 °C at 150 Mbps
1.25 mA per channel at 1 Mbps
Narrow body SOIC-8 package
I< 2 mA per channel at 10 Mbps
I< 4 mA per channel at 100 Mbps
I<
1
2
3
4
Top View
8
7
6
5
V
DD2
GND2
B1
GND2
Si842x
V
DD1
A1
A2
GND1
Applications
Isolated switch mode supplies
Isolated ADC, DAC
Motor control
Power factor correction systems
1
2
3
4
Top View
8
7
6
5
V
DD2
B1
B2
GND2
Safety Regulatory Approvals*
UL recognition: 2500 Vrms for 1
IEC certification conformity
Minute per UL1577
IEC 60747-5-2
(VDE0884 Part 2)
CSA component acceptance
notice
Description
The Silicon Laboratories family of ultra low power 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. Two speed grade options (1 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
*Note:
Pending.
Preliminary Rev. 0.22 1/09
Copyright © 2009 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. 0.22
Si8410/20/21
T
ABLE O F
C
ONTENTS
Section
Page
1. Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
2. Typical Performance Characteristics* . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
3. Application Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
3.1. Theory of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
3.2. Eye Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4. Layout Recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
4.1. Supply Bypass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
4.2. Input and Output Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4.3. RF Radiated Emissions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4.4. RF Immunity and Common Mode Transient Immunity . . . . . . . . . . . . . . . . . . . . . . . 21
5. Pin Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
6. Ordering Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
7. Package Outline: 8-Pin SOIC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
8. Top Marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Document Change List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
Contact Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
Preliminary Rev. 0.22
3
Si8410/20/21
1. Electrical Specifications
Table 1. Electrical Characteristics
1
(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
Si8410Ax, Bx
V
DD1
V
DD2
V
DD1
V
DD2
Si8420Ax, Bx
V
DD1
V
DD2
V
DD1
V
DD2
Si8421Ax, Bx
V
DD1
V
DD2
V
DD1
V
DD2
Si8410Ax, Bx
V
DD1
V
DD2
Si8420Ax, Bx
V
DD1
V
DD2
Si8421Ax, Bx
V
DD1
V
DD2
Si8410Bx
V
DD1
V
DD2
Si8420Bx
V
DD1
V
DD2
Si8421Bx
V
DD1
V
DD2
Symbol
V
IH
V
IL
V
OH
V
OL
I
L
Test Condition
Min
2.0
—
Typ
—
—
4.8
0.2
—
Max
—
0.8
—
0.4
±10
Unit
V
V
V
V
µA
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
—
—
—
—
—
—
—
—
—
—
—
—
1
1
2
1
1
2
3
2
2
2
3
3
2
2
4
2
2
4
6
4
4
4
6
6
mA
mA
mA
1 Mbps Supply Current
(All inputs = 500 kHz square wave, CI = 15 pF on all outputs)
—
—
—
—
—
—
2
1
2
2
3
3
3
2
4
4
5
5
mA
mA
mA
100 Mbps Supply Current
(All inputs = 50 MHz square wave, CI = 15 pF on all outputs)
—
—
—
—
—
—
2
6
3
12
8
8
4
12
5
18
12
12
mA
mA
mA
4
Preliminary Rev. 0.22
Si8410/20/21
Table 1. Electrical Characteristics
1
(Continued)
(V
DD1
= 5 V, V
DD2
= 5 V, T
A
= –40 to 125 ºC)
Parameter
Si8410Ax, Si8420Ax, Si8421Ax
Maximum Data Rate
Minimum Pulse Width
Propagation Delay
Pulse Width Distortion
|t
PLH
- t
PHL
|
Propagation Delay Skew
2
Channel-Channel Skew
Si8410Bx, Si8420Bx, Si8421Bx
Maximum Data Rate
Minimum Pulse Width
Propagation Delay
Pulse Width Distortion
|t
PLH
- t
PHL
|
Propagation Delay Skew
2
Channel-Channel Skew
Output Rise Time
Output Fall Time
Common Mode Transient
Immunity
Start-up Time
3
Symbol
Test Condition
Timing Characteristics
Min
Typ
Max
Unit
0
—
t
PHL
, t
PLH
PWD
t
PSK(P-P)
t
PSK
See Figure 1
See Figure 1
—
—
—
—
0
—
t
PHL
, t
PLH
PWD
t
PSK(P-P)
t
PSK
For All Models
t
r
t
f
CMTI
t
SU
C
L
= 15 pF
C
L
= 15 pF
V
I
= V
DD
or 0 V
—
—
20
—
See Figure 1
See Figure 1
5
—
—
—
—
—
—
—
—
—
—
—
8
—
—
—
2
2
25
30
1
250
35
25
40
35
150
6
15
3
10
3
—
—
—
—
Mbps
ns
ns
ns
ns
ns
Mbps
ns
ns
ns
ns
ns
ns
ns
kV/µs
µs
Notes:
1.
Electrical specification values are preliminary. Various specifications will be adjusted to reflect actual performance as
final product characterization data becomes available.
2.
t
PSK(P-P)
is the magnitude of the difference in propagation delay times measured between different units operating at
the same supply voltages, load, and ambient temperature.
3.
Start-up time is the time period from the application of power to valid data at the output.
Preliminary Rev. 0.22
5
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