SI8621EC-B-IS Silicon Laboratories Inc, SI8621EC-B-IS Datasheet - Page 21

• Manufacturer Part Number: SI8621EC-B-IS
• Description: IC ISOLATOR 2CH 3.75KV 8SOIC
• Manufacturer: Silicon Laboratories Inc

Specifications of SI8621EC-B-IS

• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 336-2066-5

3.1. Device Startup
Outputs are held low during powerup until VDD is above the UVLO threshold for time period tSTART. Following
this, the outputs follow the states of inputs.
3.2. Undervoltage Lockout
Undervoltage Lockout (UVLO) is provided to prevent erroneous operation during device startup and shutdown or
when VDD is below its specified operating circuits range. Both Side A and Side B each have their own
undervoltage lockout monitors. Each side can enter or exit UVLO independently. For example, Side A
unconditionally enters UVLO when V
V
V
V
DD1(UVLO+)
INPUT
OUTPUT
DD1
DD2
UVLO+
UVLO-
UVLO+
UVLO-
tSTART
. Side B operates the same as Side A with respect to its V
tSD
Figure 7. Device Behavior during Normal Operation
tSTART
DD1
falls below V
tSTART
Rev. 1.3
DD1(UVLO–)
DD2
and exits UVLO when V
supply.
Si8610/20/21/22
tPHL
tPLH
DD1
rises above
21