MIC1832

µP Supervisory Circuit

3

Note 1: ICC is measured with PBRST and all outputs open and inputs within 0.5V of supply rails.

Note 2: Measured with VCC

≥ 2.7V.

Note 3: Measured with VCC < 2.7V.

Note 4: PBRST has an internal pull-up resistor to VCC (typ. 40kΩ).

Note 6: PBRST must be held low for a minimum of 20ms to guarantee a reset.

Note 7: VCC falling at 8.5mv/µs.

A.C. Electrical Characteristics

Parameter

Conditions

Min

Typ

Max

Units

PBRST Min. Pulse Width, tPB

PBRST = VIL (see note 6)

20

ms

PBRST Delay, tPBD

1

4

20

ms

Reset Active Time, tRST

250

610

1000

ms

ST Pulse Width, tST

20

ns

ST Timeout Period, tTD

TD = 0V

62.5

150

250

ms

TD = Open

250

600

1000

TD = VCC

500

1200

2000

VCC Fall Time, tF

40

µs

VCC Rise Time, tR

0

ns

VCC Detect to RST Low

VCC Falling (see note 7)

5

8

µs

and RST High, tRPD

VCC Detect to RST High

VCC Rising

250

610

1000

ms

and RST Low, tRPU