AC Electrical Characteristics
measured directly on the V
pin. The specifications for this regulator are shown in Table 10-8.
CAP
Table 10-8. Regulator Parameters
Characteristic
Short Circuit Current
Symbol
ISS
Min
—
Typical
450
Max
650
30
Unit
mA
Short Circuit Tolerance
(VCAP shorted to ground)
TRSC
—
—
minutes
10.3 AC Electrical Characteristics
Tests are conducted using the input levels specified in Table 10-5. Unless otherwise specified,
propagation delays are measured from the 50% to the 50% point, and rise and fall times are measured
between the 10% and 90% points, as shown in Figure 10-2.
Low
VIL
High
VIH
90%
50%
10%
Input Signal
Midpoint1
Fall Time
Note: The midpoint is VIL + (VIH – VIL)/2.
Rise Time
Figure 10-2 Input Signal Measurement References
Figure 10-3 shows the definitions of the following signal states:
•
•
•
Active state, when a bus or signal is driven, and enters a low impedance state
Tri-stated, when a bus or signal is placed in a high impedance state
Data Valid state, when a signal level has reached VOL or VOH
•
Data Invalid state, when a signal level is in transition between VOL and VOH
Data2 Valid
Data2
Data1 Valid
Data1
Data3 Valid
Data3
Data
Tri-stated
Data Invalid State
Data Active
Data Active
Figure 10-3 Signal States
56F8037/56F8027 Data Sheet, Rev. 6
Freescale Semiconductor
147
FREESCALE [ Freescale ]
