MC9S08QE16CLC Datasheet, PDF (311/350 Pages) Freescale Semiconductor, Inc – Low-power wireless applications, Gas, water and heater meters

Appendix A Electrical Characteristics and Timing Specifications
Table A-6. DC Characteristics (continued)
Num C
Parameter
Symbol Min Typ¹ Max Unit
16 P Low-voltage detection threshold — high range
V_DD falling V_LVDH
4.2
4.3
4.4
V
V_DD rising
4.3
4.4
4.5
Low-voltage detection threshold — low range
17 P
V_DD falling V_LVDL
2.48 2.56 2.64
V
V_DD rising
2.54 2.62
2.7
Low-voltage warning threshold — high range
18 P
V_DD falling V_LVWH
4.2
4.3
4.4
V
V_DD rising
4.3
4.4
4.5
Low-voltage warning threshold — low range
19 P
V_DD falling V_LVWL
2.48 2.56 2.64
V
V_DD rising
2.54 2.62
2.7
Low-voltage inhibit reset/recover hysteresis
20 P
5V V_hys
3V
—
100
—
mV
—
60
—
21 P Bandgap Voltage Reference⁵
V_BG
DC Injection Current^{6, 7, 8, 9}
Single pin limit
V_IN > V_DD
22 D
V_IN < V_SS I_IC
Total MCU limit, includes sum of all stressed pins
V_IN > V_DD
V_IN < V_SS
1.185 1.2 1.215
V
0
2
0
—
–0.2
mA
0
25
0
–5
1 _{Typical values are based on characterization data at 25C unless otherwise stated.}
2 _{Measured with VIn = VDD or VSS.}
3 _{Measured with VIn = VSS.}
4 _{Measured with VIn = VDD.}
5 _{Factory trimmed at VDD = 5.0 V, Temp = 25 C.}
6 _{Power supply must maintain regulation within operating VDD range during instantaneous and operating}
maximum current conditions. If positive injection current (V_In > V_DD) is greater than I_DD, the injection current
may flow out of V_DD and could result in external power supply going out of regulation. Ensure external V_DD
load will shunt current greater than maximum injection current. This will be the greatest risk when the MCU
is not consuming power. Examples are: if no system clock is present, or if clock rate is very low which (would
reduce overall power consumption).
7 _{All functional non-supply pins are internally clamped to VSS and VDD.}
8 _{Input must be current limited to the value specified. To determine the value of the required current-limiting}
resistor, calculate resistance values for positive and negative clamp voltages, then use the larger of the two
values.
9 _{IRQ does not have a clamp diode to VDD. Do not drive IRQ above VDD.}
MC9S08AC60 Series Data Sheet, Rev. 3
Freescale Semiconductor
311