Information

5.2 Nonswitching electrical specifications
5.2.1 Voltage and current operating requirements
Table 1. Voltage and current operating requirements
Symbol Description Min. Max. Unit Notes
V
DD
Supply voltage 1.71 3.6 V
V
DDA
Analog supply voltage 1.71 3.6 V
V
DD
– V
DDA
V
DD
-to-V
DDA
differential voltage –0.1 0.1 V
V
SS
– V
SSA
V
SS
-to-V
SSA
differential voltage –0.1 0.1 V
V
BAT
RTC battery supply voltage 1.71 3.6 V
V
IH
Input high voltage
• 2.7 V ≤ V
DD
≤ 3.6 V
• 1.7 V ≤ V
DD
≤ 2.7 V
0.7 × V
DD
0.75 × V
DD
—
—
V
V
V
IL
Input low voltage
• 2.7 V ≤ V
DD
≤ 3.6 V
• 1.7 V ≤ V
DD
≤ 2.7 V
—
—
0.35 × V
DD
0.3 × V
DD
V
V
V
HYS
Input hysteresis 0.06 × V
DD
— V
I
ICIO
I/O pin DC injection current — single pin
• V
IN
< V
SS
-0.3V (Negative current injection)
• V
IN
> V
DD
+0.3V (Positive current injection)
-3
—
—
+3
mA
1
I
ICcont
Contiguous pin DC injection current —regional limit,
includes sum of negative injection currents or sum of
positive injection currents of 16 contiguous pins
• Negative current injection
• Positive current injection
-25
—
—
+25
mA
V
RAM
V
DD
voltage required to retain RAM 1.2 — V
V
RFVBAT
V
BAT
voltage required to retain the VBAT register file V
POR_VBAT
— V
1. All analog pins are internally clamped to V
SS
and V
DD
through ESD protection diodes. If V
IN
is greater than V
AIO_MIN
(=V
SS
-0.3V) and V
IN
is less than V
AIO_MAX
(=V
DD
+0.3V) is observed, then there is no need to provide current limiting
resistors at the pads. If these limits cannot be observed then a current limiting resistor is required. The negative DC
injection current limiting resistor is calculated as R=(V
AIO_MIN
-V
IN
)/|I
IC
|. The positive injection current limiting resistor is
calcualted as R=(V
IN
-V
AIO_MAX
)/|I
IC
|. Select the larger of these two calculated resistances.
General
K20 Sub-Family Data Sheet, Rev. 4 5/2012.
Freescale Semiconductor, Inc. 11