MIC2774

Micrel

MIC2774

2

September 29, 2000

Pin Configuration

RST

VDD

IN

/MR

1

3

45

2

GND

SOT-23-5 (M5)

“H” Version

/RST

VDD

IN

/MR

1

3

45

2

GND

SOT-23-5 (M5)

“L” and “N” Version

Standard Voltage Options*

Voltage

Typical

Nominal Threshold

Code

Application (V

Voltage (V

46

5.0V

±5%

4.68

44

5.0V

±10%

4.43

31

3.3V

±5%

3.09

29

3.3V

±10%

2.93

28

3.0V

±5%

2.81

26

2.85V

±5%

2.67

25

2.70V

±5%

2.53

23

2.5V

±5%

2.34

22

2.4V

±5%

2.25

17

1.8V

±5%

1.69

*There are ten standard versions available with an order increment of 3000 pieces. Samples of standard versions are

normally available from stock. Contact factory for information on non-standard versions. Available in tape-and-reel only.

Pin Description

Pin Number

Pin Number

Pin Name

Pin Function

MIC2774H

MIC2774L

MIC2774N

1

RST

Digital (Output): Asserted high whenever V

old voltage. It will remain asserted for no less than 140ms after V

return above the threshold limits.

1

/RST

Digital (Output): Asserted low whenever V

voltage. It will remain asserted for no less than 140ms after V

return above the threshold limits. (open-drain for “N” version)

2

2

GND

Ground

3

3

/MR

Digital (Input): Driving this pin low initiates immediate and unconditional

reset. Assuming V

released (returns high), the reset output will be de-asserted no less than

140ms later. /MR may be driven by a logic signal or a mechanical switch.

/MR has an internal pull-up to V

4

4

IN

Analog (Input): The voltage on this pin is compared to the internal 300mV

reference. An under-voltage condition will trigger a reset sequence.

5

5

VDD

Analog (Input): Power supply input for internal circuitry and input to the fixed

voltage monitor. The voltage on this pin is compared against the internal

reference. An undervoltage condition will trigger a reset sequence.