YHY638F
13.56MHz RFID Reader/Writer
User Manual
Version 1.0 Page 4 of 28 Apr 2010
4 Electrical Characteristics
4.1 Operating Condition Range
Relative humidity:up to 90%
Symbol Parameter Conditions Min Typ Max Unit
Tamb Ambient
Temperature 0 25 60
℃
VDD
DC Supply
Voltage DVSS =
0V 4.5
5
5.5
V
Table 1 - Operating Condition Range
4.2 Current Consumption
Symbol Parameter Conditions Min Typ Max Unit
IDVDD
Supply
Current
Reading started
but no cards in
the reader range
90 mA
IDVDD
Reading started,
1 card in the
reader range
95 mA
Table 2 - Current Consumption
4.3 Operating Distance
Symbol Parameter Conditions Min Typ Max Unit
OD
14443 Type A S50 tag
Operating Distance, Measured
from the
reader
bottom
0-70
mm
OD
14443 Type B tag
Operating Distance Measured
from the
reader
bottom
0-45 mm
OD
15693 tag Operating
Distance, Measured
from the
reader
bottom
0-90 mm
Table 3 - Operating Distance
4.4 COM Interface Characteristics
Symbol Parameter Conditions Min Typ Max Unit