MEC1404 Datasheet, PDF (493/572 Pages) Microchip Technology – Keyboard and Embedded Controller Products for Notebook PC

MEC140X/1X
42.2 Operational Specifications
42.2.1 POWER SUPPLY OPERATIONAL CHARACTERISTICS
TABLE 42-3: POWER SUPPLY OPERATING CONDITIONS
Symbol
VBAT
VTR
VTR_33_18
Parameter
MIN
TYP
Battery Backup Power Supply
2.0
3.0
Suspend Power Supply
3.3V Power Supply
3.135
3.3
3.135
3.3
1.8V Power Supply
1.71
1.80
Note: The specification for the VTR & VTR_33_18 supplies are +/- 5%.
MAX
3.6
3.465
3.465
1.89
Units
V
V
V
V
42.2.2 AC ELECTRICAL SPECIFICATIONS
The AC Electrical Specifications for the clock input time are defined in Section 43.2, "Clocking AC Timing Characteris-
tics," on page 506. The clock rise and fall times use the standard input thresholds of 0.8V and 2.0V unless otherwise
specified and the capacitive values listed in Section 42.2.2, "AC Electrical Specifications," on page 493.
42.2.3 CAPACITIVE LOADING SPECIFICATIONS
The following table defines the maximum capacitive load validated for the buffer characteristics listed in Table 42-5, “DC
Electrical Characteristics,” on page 494.
CAPACITANCE T_A = 25°C; fc = 1MHz; V_cc = 3.3 VDC
Note: All output pins, except pin under test, tied to AC ground.
TABLE 42-4: MAXIMUM CAPACITIVE LOADING
Parameter
Limits
Symbol
Unit
MIN
TYP
MAX
Input Capacitance of PCI_I and
C_IN
PCI_IO pins
Input Capacitance of PCI_CLK pin C_IN
Output Load Capacitance supported
by PCI_IO, PCI_O, and PCI_OD
SUSCLK Input Capacitance
Input Capacitance of PECI_I and
PECI_IO
Output Load Capacitance supported
by PECI_IO and OD_PH
C_OUT
C_IN
C_IN
C_OUT
Note 42-
pF
2
Note 42-
pF
2
Note 42-
pF
2
10
pF
10
pF
10
pF
Notes
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DS00001956D-page 493