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SI8440 Datasheet(PDF) 7 Page - Silicon Laboratories

Part # SI8440
Description  QUAD-CHANNEL DIGITAL ISOLATOR
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Manufacturer  SILABS [Silicon Laboratories]
Direct Link  http://www.silabs.com
Logo SILABS - Silicon Laboratories

SI8440 Datasheet(HTML) 7 Page - Silicon Laboratories

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Si8440/1/2
Rev. 0.3
7
Timing Characteristics
Maximum Data Rate
0
100
Mbps
Minimum Pulse Width
5
ns
Propagation Delay1
tPHL,tPLH
—7.5
ns
Pulse Width Distortion
|tPLH - tPHL|1
PWD
1
ns
Propagation Delay Skew2
tPSK
—8
ns
Channel-Channel Skew3
tPSKCD/OD
—1
ns
Output Rise Time
C1 = 15 pF
2
ns
Output Fall Time
C1 = 15 pF
2
ns
Common Mode Transient
Immunity at Logic Low Output4
CML
25
30
kV/µs
Common Mode Transient
Immunity at Logic High Output4
CMH
25
30
kV/µs
Enable to Data Valid
ten1
—5
ns
Enable to Data Tri-State
ten2
—5
ns
Start-up Time5
tSU
—3
µs
Notes:
1. tPHL propagation delay is measured from the 50% level of the falling edge of the VIx signal to the 50% level of the falling
edge of the VOx signal. tPLH propagation delay is measured from the 50% level of the rising edge of the VIx signal to the
50% level of the rising edge of the VOx signal.
2. tPSK is the magnitude of the worst-case difference in tPHL or tPLH that is measured between units at the same operating
temperature, supply voltages, and output load within the recommended operating conditions.
3. Codirectional channel-to-channel matching is the absolute value of the difference in propagation delays between any
two channels with inputs on the same side of the isolation barrier. Opposing-directional channel-to-channel matching is
the absolute value of the difference in propagation delays between any two channels with inputs on opposing sides of
the isolation barrier.
4. CMH is the maximum common-mode voltage slew rate that can be sustained while maintaining VO > 0.8 VDD2. CML is
the maximum common-mode voltage slew rate that can be sustained while maintaining VO < 0.8 V. The common-mode
voltage slew rates apply to both rising and falling common-mode voltage edges. The transient magnitude is the range
over which the common mode is slewed.
5. Start-up time is the time period from the application of power to valid data at the output.
Table 2. Electrical Characteristics (Continued)
(VDD1 = 3.3 V, VDD2 = 3.3 V, TA = –40 to 125 C°)
Parameter
Symbol
Test Condition
Min
Typ
Max
Unit


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