MM1096 datasheet(4/7 Pages) MITSUMI

Part #	MM1096

Description	System Reset (with built-in watchdog timer) Monolithic MM1096

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Manufacturer	MITSUMI [Mitsumi Electronics, Corp.]

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MITSUMI

System Reset (with built-in watchdog timer) MM1096

Electrical Characteristics (DC)

(Except where noted otherwise, MM1096A : VCC=3.6V, Ta=25°C, MM1096B : VCC=5.0V)

(Except where noted otherwise, resistance unit is

Ω)

Item

Symbol

Measurement conditions

Min.

Typ.

Max.

Units

MM1096A

8

VCC input

TPI

µs

pulse width

MM1096B

8

CK input pulse width

TCKW

3µs

CK input cycle

TCK

20

µs

Watchdog timer

monitoring time *1

TWD

CT=0.02µF

25

50

75

ms

Reset time for

watchdog timer *2

TWR

CT=0.02µF

1

2

3

ms

Reset hold time for

power supply rise *3

TPR

510

15

ms

Output delay time from VCC *4 TPD

RESET

--------------------------------------------------------------------------

pin, RL=10k, CL=20pF

2

10

µs

Output rise time *5

tR

RESET

--------------------------------------------------------------------------

pin, RL=10k, CL=20pF

2.0

4.0

µs

Output fall time *5

tF

RESET

--------------------------------------------------------------------------

pin, RL=10k, CL=20pF

0.2

1.0

µs

VCC

3.6V

2.8V

VCC

5.0V

4.0V

CT=0.02µF, VCC

Notes:

*1 Monitoring time is the time from the last pulse (negative edge) of the timer clear clock pulse until reset

pulse output. In other words, reset output is output if a clock pulse is not input during this time.

*2 Reset time means reset pulse width. However, this does not apply to power ON reset.

*3 Reset hold time is the time from when VCC exceeds detection voltage (VSH) during power ON reset until

reset release (RESET

-----------------------------------------------

output high).

*4 Output delay time is the time from when power supply voltage drops below detection voltage (VSL) until

reset (RESET

-----------------------------------------------

output low).

*5 Voltage range when measuring output rise and fall is 10~90%.

*6 Watchdog timer monitoring time (TWD), watchdog timer reset time (TWR) and reset hold time (TPR) during

power supply rise can be changed by varying CT capacitance. The times are expressed by the following

formulae.

TPR (ms)

.

=. 500

CT (µF)

TWD (ms)

.

=. 2500

CT (µF)

TWR (ms)

.

=. 100

CT (µF)

Example : When CT=0.02µF

TPR

.

=. 10ms

TWD

.

=. 50ms

TWR

.

=. 2ms

CK

or

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MM1096 Datasheet(PDF) 4 Page - Mitsumi Electronics, Corp.

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