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OPR 2001
Specifications Manual
10
5. Electrical Specifications
5.1. RS-232C
Parameter Symbol Min Typ Max Unit Notes
Power supply voltage V
DD
4.5 6.0 6.5 V
Operating current I
OP
- 90 150 mA No buzzer
Peak current I
PEAK
- 550 600 mA
Standby current I
PRE
- 35 70 mA
Startup time T
D
- 100 - ms
5.2. USB, Wedge
Parameter Symbol Min Typ Max Unit Notes
Power supply voltage V
DD
4.5 5.0 5.5 V
Operating current I
OP
- 90 150 mA No buzzer
Peak current I
PEAK
- 450 500 mA
Standby current I
PRE
- 35 70 mA
Startup time T
D
- 100 - ms
Conditions
• Connect 1Ω resistance to a power supply line in series and measure the current
by the voltage between both ends of resistance.
• Power supply voltage is measured at a connector terminal area.
• The current value depends on the interface type and host computer to which the
device is connected.