RFM22B/23B
Table 6. Digital IO Specifications (SDO, SDI, SCLK, nSEL, and nIRQ)
Parameter
Rise Time
Fall Time
Input Capacitance
Logic High Level Input Voltage
Logic Low Level Input Voltage
Input Current
Logic High Level Output
Voltage
Logic Low Level Output Voltage
Symbol
T
RISE
T
FALL
C
IN
V
IH
V
IL
I
IN
V
OH
V
OL
0<V
IN
< V
DD
I
OH
<1 mA source, V
DD
=1.8 V
I
OL
<1 mA sink, V
DD
=1.8 V
–100
V
DD
– 0.6
—
Conditions
0.1 x V
DD
to 0.9 x V
DD
, C
L
= 5 pF
0.9 x V
DD
to 0.1 x V
DD,
C
L
= 5 pF
Min
—
—
—
V
DD
– 0.6
Typ
—
—
—
—
—
—
—
—
Max
8
8
1
—
0.6
100
—
0.6
Units
ns
ns
pF
V
V
nA
V
V
Table 7. GPIO Specifications (GPIO_0, GPIO_1, and GPIO_2)
Parameter
Rise Time
Fall Time
Input Capacitance
Logic High Level Input Voltage
Logic Low Level Input Voltage
Input Current
Input Current If Pullup is Activated
Maximum Output Current
Symbol
T
RISE
T
FALL
C
IN
V
IH
V
IL
I
IN
I
INP
I
OmaxLL
I
OmaxLH
I
OmaxHL
I
OmaxHH
Logic High Level Output Voltage
Logic Low Level Output Voltage
V
OH
V
OL
0<V
IN
< V
DD
V
IL
=0 V
DRV<1:0>=LL
DRV<1:0>=LH
DRV<1:0>=HL
DRV<1:0>=HH
I
OH
< I
Omax
source,
V
DD
=1.8 V
I
OL
< I
Omax
sink,
V
DD
=1.8 V
Conditions
0.1 x V
DD
to 0.9 x V
DD
,
C
L
= 10 pF, DRV<1:0>=HH
0.9 x V
DD
to 0.1 x V
DD,
C
L
= 10 pF, DRV<1:0>=HH
Min
—
—
—
V
DD
– 0.6
—
–100
5
0.1
0.9
1.5
1.8
V
DD
– 0.6
—
Typ
—
—
—
—
—
—
—
0.5
2.3
3.1
3.6
—
—
0.6
100
25
0.8
3.5
4.8
5.4
—
0.6
Max
8
8
1
Units
ns
ns
pF
V
V
nA
µA
mA
mA
mA
mA
V
V
9
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