K20P81M72SF1 Datasheet, PDF (11/74 Pages) Freescale Semiconductor, Inc – K20 Sub-Family

General
5.2 Nonswitching electrical specifications
5.2.1 Voltage and current operating requirements
Table 1. Voltage and current operating requirements
Symbol Description
V_DD
Supply voltage
V_DDA
Analog supply voltage
V_DD – V_DDA V_DD-to-V_DDA differential voltage
V_SS – V_SSA V_SS-to-V_SSA differential voltage
V_BAT
RTC battery supply voltage
V_IH
Input high voltage
• 2.7 V ≤ V_DD ≤ 3.6 V
• 1.7 V ≤ V_DD ≤ 2.7 V
Min.
Max.
Unit
1.71
3.6
V
1.71
3.6
V
–0.1
0.1
V
–0.1
0.1
V
1.71
3.6
V
0.7 × V_DD
—
V
0.75 × V_DD
—
V
Notes
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
V
—
0.3 × V_DD
V
V_HYS
Input hysteresis
0.06 × V_DD
—
V
I_ICDIO Digital pin negative DC injection current — single pin
1
• V_IN < V_SS-0.3V
-5
—
mA
I_ICAIO
Analog², EXTAL, and XTAL pin DC injection current
3
— single pin
mA
• V_IN < V_SS-0.3V (Negative current injection)
-5
—
• V_IN > V_DD+0.3V (Positive current injection)
—
+5
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
-25
—
mA
• Positive current injection
—
+25
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 5 V tolerant digital I/O pins are internally clamped to V_SS through a ESD protection diode. There is no diode connection
to V_DD. If V_IN greater than V_{DIO_MIN} (=V_SS-0.3V) is observed, then there is no need to provide current limiting resistors at
the pads. If this limit cannot be observed then a current limiting resistor is required. The negative DC injection current
limiting resistor is calculated as R=(V_{DIO_MIN}-V_IN)/|I_IC|.
2. Analog pins are defined as pins that do not have an associated general purpose I/O port function.
K20 Sub-Family Data Sheet, Rev. 2, 4/2012.
Freescale Semiconductor, Inc.
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