MIC2772 데이터 시트보기 (PDF) - Micrel

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MIC2772

Dual Voltage Supervisor

Micrel 

Micrel

MIC2772

Pin Description

Pin Number

1

2

3

4

5

6

7

8

Pin Name

/MR1

GND1

/MR2

GND2

/RESET2

VCC2

/RESET1

VCC1

Pin Function

Digital Input; supervisor 1. Driving this pin low initiates an immediate and

unconditional reset. If VCC1 is above the threshold when /MR1 is released

(returns high), RESET1 will be de-asserted no less than tRESET1 later. /MR1 may

be driven by a CMOS or TTL logic signal or a mechanical switch. De-bouncing

is performed internally. /MR1 has an internal pull-up to VCC1; leave open if

unused.

Ground return for supervisor 1.

Digital Input; supervisor 2. Driving this pin low initiates an immediate and

unconditional reset. If VCC2 is above the threshold when /MR2 is released

(returns high), the /RESET2 will be de-asserted no less than tRESET2 later. /MR2

may be driven by a CMOS or TTL logic signal or a mechanical switch. De-

bouncing is performed internally. /MR2 has an internal pull-up to VCC2; leave

open if unused.

Ground return for supervisor 2.

Digital Output; open-drain; supervisor 2. Asserted low whenever VCC2 falls

below the threshold voltage. It remains asserted for no less than tRESET2 and is

de-asserted after VCC2 returns above the threshold.

Analog Input. Power supply input for supervisor 2.

Digital Output; open-drain; supervisor 1. Asserted low whenever VCC1 falls

below the threshold voltage. It remains asserted for no less than tRESET1 and is

de-asserted after VCC1 returns above the threshold.

Analog Input. Power supply input for supervisor 1.

April 2005

3

M9999-042605

(408) 955-1690

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