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MIC809-5

Microprocessor Reset Circuit

Micrel 

MIC809-5

Absolute Maximum Ratings(1)

Terminal Voltage (VCC) .................................–0.3V to +6.0V

Input Current (VCC)..................................................... 20mA

Output Current (/RESET, RESET).............................. 20mA

Lead Temperature (soldering, 10 sec.)...................... 300°C

Storage Temperature (TS) .......................... –65°C to 150°C

Rate of Rise (VCC).................................................. 100V/µs

ESD Rating(3) ................................................................ 3kV

Micrel

Operating Ratings(2)

Ambient Temperature (TA) .......................... –40°C to +85°C

Power Dissipation (TA = +70°C) .............................. 320mW

Electrical Characteristics

For typical values, VCC = 3.3V, TA = 25°C; bold are for –40°C to +85°C; unless otherwise noted

Symbol

Parameter

Condition

Min

VCC

ICC

VTH

VHYST

tRST

tPROP

VOH

VOL

Operating Voltage Range

Supply Current

Reset Voltage Threshold

Typical hysteresis

Reset Timeout Period

Propogation delay

/RESET Output Voltage High

/RESET Output Voltage Low

TA = –40°C to 85°C

VCC < 3.6V

S Voltage Options

/RESET < VOL, 100mV Overdrive

ISOURCE = 500µA

VCC = VTH min., ISINK = 1.2mA

VCC > 1V, ISINK = 50µA

1

2.85

30

0.8×VCC

Note 1. Exceeding the absolute maximum rating may damage the device.

Note 2. The device is not guaranteed to function outside its operating rating.

Note 3. Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5k in series with 100pF.

Typ

5

2.93

5

14.5

Max Units

5.5

V

10

µA

3.00

V

mV

66

ms

µs

V

0.3

V

0.3

V

Timing Diagram

VCC

/RESET

VTH

tRST

VTH

tRST

Reset Timing Diagram

July 2005

3

M9999-071305

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