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ILC1232

mP Supervisory Circuit

Impala Linear Corporation 

ILC1232 mP Supervisory Circuit

Sept 1999

Absolute Maximum Ratings

Parameter

Terminal Voltage

Input Current

Operating Temperature Range

Storage Temperature Range

Lead Temperature (Soldering, 10 sec.)

Power Dissipation

Symbol

VCC

All other inputs

VCC

GND, All other

inputs

TA

Ratings

-0.3 to 6.0

-0.3 to (VCC + 0.3)

250

25

Units

V

V

mA

mA

-40 to +85

°C

-65 to +150

°C

300

°C

700

mW

Stresses above those listed under ABSOLUTE MAXIMUM RATINGS may cause permanent device failure. Functionality at

or above these limits is not implied. Exposure to absolute maximum ratings for extended periods may affect device reliabil-

ity. Operating ranges define those limits between which the functionality of the device is guaranteed.

Electrical Characterisitcs

VCC = 4.5 V to 5.5 V, TA = Operating Temperature Range, unless otherwise noted.

Parameter

Conditions

Min

Operating Voltage Range, VCC

4.5

Supply Current, ICC

(See Note 1)

ST and PBRST Input Levels

VIH (See Note 2)

2.0

VIL

-0.3

Input Leakage, IIL

Output Source Current, RST

VOH = 2.4V

1.0

Output Sink Current, RST, RST

VOL = 0.4V

2.0

VCC 5% Trip Point (Reset Threshold Voltage) TOL= GND

4.50

VCC 10% Trip Point (Reset Threshold Voltage) TOL= VCC

4.25

Input Capacitance, ST, TOL

CIN (See Note 3)

Output Capacitance, RST, RST

COUT (See Note 3)

PBRST Min. Pulse Width, tPB

PBRST = VIL (See Note 4)

20

PBRST Delay, tPBD

1

Reset Active Time, tRST

250

ST Pulse Width, tST

20

ST Timeout Period, tTD

TD = 0V

62.5

TD = Open

250

VCC Fall Time, tF

TD = VCC

500

10

VCC Rise Time, tR

0

VCC Detect to RST Low and RST High, tRPD VCC Falling at 1.66 mV/µs

VCC Detect to RST Open and RST Low, tRPU VCC Rising (See Note 5)

250

Typ

Max

5.5

18

40

VCC + 0.3

0.8

1

10

10

4.62

4.74

4.37

4.49

5

7

4

20

610

1000

150

600

1200

250

1000

2000

50

150

610

1000

Units

V

µA

V

µA

mA

mA

V

V

pF

pF

ms

ms

ms

ns

ms

µs

ns

µs

ms

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

Note 2: PBRST has an internal 40kΩ (typical) pull-up resistor to VCC.

Note 3: Guaranteed by design.

Note 4: PBRST must be held low for a minimum of 20ms to guarantee a reset.

Note 5: RST has an open drain output.

Impala Linear Corporation

ILC1232 1.1

(408) 574-3939 www.impalalinear.com

June 1999 2

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