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MIC1232 Datasheet(PDF) 3 Page - Micrel Semiconductor

Part No. MIC1232
Description  μP Supervisory Circuit
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Maker  MICREL [Micrel Semiconductor]
Homepage  http://www.micrel.com
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MIC1232 Datasheet(HTML) 3 Page - Micrel Semiconductor

   
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Note 1: ICC is measured with outputs open and inputs within 0.5V of supply rails.
Note 2: PBRST has an internal pull-up resistor to VCC (typ. 40kΩ).
Note 3: Guaranteed by design.
Note 4: PBRST must be held low for a minimum of 20ms to guarantee a reset.
Note 5: VCC falling at 1.66mv/µs.
Note 6: RST has an open drain output.
3
MIC1232
µP Supervisory Circuit
A.C. Electrical Characteristics
VCC = 4.5V to 5.5V, TA = Operating Temperature Range, unless otherwise noted.
Parameter
Conditions
Min
Typ
Max
Units
PBRST Min. Pulse Width, tPB
PBRST = VIL (see note 4)
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
10
µs
VCC Rise Time, tR
0
ns
VCC Detect to RST Low
VCC Falling (see note 5)
50
150
µs
and RST High, tRPD
VCC Detect to RST Open
VCC Rising (see note 6)
250
610
1000
ms
and RST Low, tRPU


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