R
EM4223
Electrical Characteristics
VDD= 2.0V, TA=+25°C, unless otherwise specified
Parameter
Operating voltage
Current consumption
Power On Reset Rising
Power On Reset Fall
Electrostatic discharge
Symbol
VDD – VSS
IS
Vponr
Vponf
HBM to MIL-STD-
883 method 3015
Fosc
Conditions
VDD-VSS = 1.5 V
Min.
Vponf
Typ.
Max.
3.5
3.9
Unit
V
uA
V
2.0
1.2
1.0
V
VDD and VSS pad
A+ pad
Over full temperature range
1.5
0.5
192
KV
KV
KHz
Internal oscillator
frequency
320
448
Input series Impedance
@900MHz
Modulation depth
decoding
Rin
Cin
VDD – VSS < 1V
19
0.620
Ω
pF
%
At typical pulse width
27 %
100 %
Table 3
Timing Characteristics
Over full voltage and temperature range, unless otherwise specified
Parameter
Forward Link
Symbol
Conditions
Min.
Typ.
33
Max.
Unit
kbps
average
(Reader to Transponder)
Pulse width
Pulse interval Data 0
Pulse interval Data 1
Tpw
Tpi0
Tpi1
100% modulation depth
100% modulation depth
100% modulation depth
6
12
24
10
20
40
14
28
56
uS
uS
uS
Return Link
(Transponder to Reader)
(note 1)
nominal at 25°C as selected by
factory programmed Personality Bit
40
or
160
kbps
Bit rate accuracy
short term (note 2)
Bit rate accuracy
long term @1.5V
During a message transmission
of nominal 40kb/s
+/- 1
%
%
+/- 15
Reply to Receive
turn-around time
Receive to Reply
turn-around time
2
Bit
times
uS
Depends on Transponders chosen
reply slot
150
Tag Command window
Tcw
Opens at the start of the 3rd bit
clock period after the end of the
last bit transmitted by the
Transponder to the reader. Closes
in the middle of the 5th bit clock
period.
Note 1: VDD= 2.0V, TA=+25°C
Note 2: VDD = 2.0V
Table 4
4
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