Analog Integrated Circuit Device Data

Freescale Semiconductor

11

34921

STATIC ELECTRICAL CHARACTERISTICS

Supervisor Circuitry

Minimum Function B+ for Charge Pump, Oscillator Up

Reset/Fault Registers Valid (10)

B+

9.0

–

–

V

RST

(10)

2.0

–

–

V

RST

(10)

2.0

–

–

V

RST

Low Voltage (11)

–

0.1

0.25

V

RST

–

4.5

4.65

4.6

4.75

4.70

V

RST

10

50

–

mV

RST

–

2.8

2.9

2.9

3.15

3.0

V

RST

10

15

–

mV

RST

85

86

90

NOM

RST

–

10

–

mV

Overtemperature Junction Temperature(12)

140

–

–

°C

Overtemperature Hysteresis(12)

10

–

30

°C

Thermal Warning (12)

–

°C

B+ Undervoltage Threshold to Assert RST

12

12.75

13.5

V

B+ Undervoltage Threshold Hysteresis(13)

1.0

1.5

2.0

V

Minimum B+ Necessary to Clear B+ Fault

–

–

15.25

V

Notes

10.

If any of these conditions for this not is true, then RST is activated until all operating conditions are met.

11.

The RST terminal uses an external pull-up, which may be to 5.0 V or 3.3 V.

12.

Guaranteed by design.

13.

Alternately, the minimum B+ fault threshold voltage must not be lower than 12 V, and the B+ fault clear voltage must not be higher than

15.25 V. The hysteresis may be greater than 2.0 V if this requirement is met.

Table 3. Static Electrical Characteristics (continued)

Characteristic

Symbol

Min

Typ

Max

Unit