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Si4421
ELECTRICAL SPECIFICATION
Test Conditions: T
op
= 27
o
C; V
dd
= V
oc
= 3.3 V
DC Characteristics
Symbol Parameter Conditions/Notes Min Typ Max Units
433 MHz band 15
868 MHz band 16
I
dd_TX_0
Supply current
(TX mode, P
out
= 0 dBm)
915 MHz band 17
mA
433 MHz band 22 26
868 MHz band 23 27
I
dd_TX_PMAX
Supply current
(TX mode, P
out
= P
max
)
915 MHz band 24 28
mA
433 MHz band 11 13
868 MHz band 12 14
I
dd_RX
Supply current (RX mode)
915 MHz band 13 15
mA
I
pd
Standby current (Sleep mode) All blocks disabled 0.3 1 µA
I
lb
Low battery voltage detector current
consumption
0.5 1.7 µA
I
wt
Wake-up timer current consumption 1.5 3.5 µA
I
x
Idle current Crystal oscillator on (Note 1) 0.6 1.2 mA
V
lb
Low battery detect threshold Programmable in 0.1 V steps 2.25 3.75 V
V
lba
Low battery detection accuracy ± 3 %
V
il
Digital input low level voltage 0.3·V
dd
V
V
ih
Digital input high level voltage 0.7·V
dd
V
I
il
Digital input current V
il
= 0 V -1 1 µA
I
ih
Digital input current V
ih
= V
dd
, V
dd
= 3.8 V -1 1 µA
V
ol
Digital output low level I
ol
= 2 mA 0.4 V
V
oh
Digital output high level I
oh
= -2 mA V
dd
-0.4 V
Notes are on page 12.
9