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SI8711CD-B-IM Datasheet(PDF) 13 Page - Silicon Laboratories

Part # SI8711CD-B-IM
Description  5 KV LED EMULATOR INPUT, OPEN COLLECTOR OUTPUT ISOLATORS
PDF  36 Pages
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Manufacturer  SILABS [Silicon Laboratories]
Direct Link  http://www.silabs.com
Logo SILABS - Silicon Laboratories

SI8711CD-B-IM Datasheet(HTML) 13 Page - Silicon Laboratories

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Si87xx
Preliminary Rev. 0.5
13
3. Technical Description
3.1. Device Behavior
Truth tables for the Si87xx are summarized in Table 10.
3.2. Device Startup
Output VO is held low during power-up until VDD rises above the UVLO+ threshold for a minimum time period of
tSTART. Following this, the output is high when the current flowing from anode to cathode is > IF(ON). Device startup,
normal operation, and shutdown behavior is shown in Figure 6.
Figure 6. Si87xx Operating Behavior (IF > IF(MIN) when VF > VF(MIN))
Table 10. Si87xx Truth Table Summary1
Input
VDD
EN2
VO
3
OFF
> UVLO
H
HIGH
OFF
> UVLO
L
HIGH
OFF
< UVLO
H
HIGH
OFF
< UVLO
L
HIGH
ON
> UVLO
H
LOW
ON
> UVLO
L
HIGH
ON
< UVLO
H
HIGH
ON
< UVLO
L
HIGH
Notes:
1. This truth table assumes VDD is powered. UVLO is typically 2.8 V.
2. Si8712 only.
3. The output voltage level is determined by the external pull-up supply.
IF
VO
VDD
tSTART
tPLH
tPHL
IF(ON)
IHYS
UVLO
Voltage level
determined by
external pull-up
supply
tUVLO
tUVLO
tPLH



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