BU7988KVT Datasheet, PDF (26/27 Pages) Rohm – 56bit LVDS Transmitter 56:8 Serializer

●About the Power On Reset
Power On Reset is not mandatory for this device.
（The PD pin should be set to high level when Power On Reset procedure is not used.）
VDD
XRST
BU7988KVT
Figure–16 terminal connection when Power On Reset is not used
However, Power On Reset procedure is strongly recommend for internal logic initialization by following
two methods.
① The method of using CR circuit.
② The method of using external specific IC.
It is recommend to do enough examination for target application.
V ^DD
schottky barrier diode
V ^DD
10KΩ
VDD
XRST
V T+
Be careful of temperature of
the capacitor especially over
and again.
B characteristic ceramics and
polymer aluminum
are recommended.
220Ω
2.2μF
XRST
Internal Reset
td
td is approximately equal to 20ms when the left RC coleus are applied.
Figure–17 Power On Reset by external a CR circuit
V ^DD
VDD
power on IC
(open drain
output)
VOUT
GND
V ^DD
220KΩ
XRST
0.1μF
B Characteristic
ceramics.
VDD
XRST
Internal Reset
Detection voltage
V T+
td
Figure–18 Power On Reset by specific IC
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