BU90R104 Datasheet, PDF (13/18 Pages) Rohm – 35bit LVDS Receiver 5:35 DeSerializer

BU90R104
●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
PD
BU90R104
Technical Note
Fig.10 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.
①The method of using CR circuit.
②The 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
PD
V_T+
220Ω
PD
2.2µF
Internal Reset
Be careful of temperature ofthe capacitor especially over and again.
B characteristic ceramics and function polymer aluminum electrolysis
are recommended.
td
td is approximately equal to 20ms
when the left RC coleus are applied.
Fig.11 Power on reset by external a CR circuit
V_DD
VDD
Power on IC
(Open drainoutput)
VOUT
GND
V_DD
220KΩ
PD
0.1μF
B Characteristic ceramics.
VDD
PD
Internal Reset
Detection voltage
V_T+
td
Fig.12 Power on reset by specific IC
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13/17
2011.02 - Rev.A