R
EM4223
Electrical Characteristics
V
DD
= 2.0V, T
A
=+25°C, unless otherwise specified
Parameter
Symbol
Operating voltage
V
DD
– V
SS
Current consumption
I
S
Power On Reset Rising
V
ponr
Power On Reset Fall
V
ponf
Electrostatic discharge
HBM to MIL-STD-
883 method 3015
Internal oscillator
Fo
sc
frequency
Input series Impedance
R
in
@900MHz
C
in
Modulation depth
decoding
Conditions
V
DD
-V
SS
= 1.5 V
Min.
V
ponf
Typ.
2.0
1.2
1.0
1.5
0.5
192
Max.
3.5
3.9
Unit
V
uA
V
V
KV
KV
KHz
Ω
pF
%
Table 3
V
DD
and V
SS
pad
A+ pad
Over full temperature range
V
DD
– V
SS
< 1V
At typical pulse width
320
19
0.620
448
27 %
100 %
Timing Characteristics
Over full voltage and temperature range, unless otherwise specified
Parameter
Symbol
Conditions
Forward Link
average
(Reader to Transponder)
Pulse width
T
pw
100% modulation depth
Pulse interval Data 0
T
pi0
100% modulation depth
Pulse interval Data 1
T
pi1
100% modulation depth
Return Link
(Transponder to Reader)
(note 1)
Bit rate accuracy
short term (note 2)
Bit rate accuracy
long term @1.5V
Reply
to Receive
turn-around time
Receive to
Reply
turn-around time
Tag Command window
T
cw
nominal at 25°C as selected by
factory programmed Personality Bit
During a message transmission
of nominal 40kb/s
Min.
6
12
24
Typ.
33
10
20
40
40
or
160
+/- 1
+/- 15
2
Depends on Transponders chosen
reply slot
Opens at the start of the 3
rd
bit
clock period after the end of the
last bit transmitted by the
Transponder to the reader. Closes
in the middle of the 5
th
bit clock
period.
150
Max.
14
28
56
Unit
kbps
uS
uS
uS
kbps
%
%
Bit
times
uS
Note 1: V
DD
= 2.0V, T
A
=+25°C
Note 2: V
DD
= 2.0V
Table 4
Copyright
©
2005, EM Microelectronic-Marin SA
4
www.emmicroelectronic.com
EMMICRO [ EM MICROELECTRONIC - MARIN SA ]
