MB89663 datasheet(27/48 Pages) FUJITSU

27 / 48 page

MB89660 Series

4. AC Characteristics

(1) Reset Timing, Hardware Standby Timing

(VCC = +5.0 V

±10%, AVSS =VSS = 0.0 V, TA = –40°C to +85°C)

* : tXCYL is the oscillation cycle (1/FC) to input to the X0 pin.

(2) Power-on Reset

(AVSS = VSS = 0.0 V, TA = –40

°C to +85°C)

Note: Make sure that power supply rises within the selected oscillation stabilization time.

If power supply voltage needs to be varied in the course of operation, a smooth voltage rise is recommended.

Parameter

Symbol

Condition

Value

Unit

Remarks

Min.

Max.

RST “L” pulse width

tZLZH

—

16 tXCYL

—ns

HST “L” pulse width

tHLHH

16 tXCYL

—ns

Parameter

Symbol

Condition

Values

Unit

Remarks

Min.

Max.

Power supply rising time

—

—50

Power supply cut-off time

tOFF

1—

Due to repeated

operations

tZLZH

0.2 VCC

RST

tHLHH

0.2 VCC

HST

0.2 V

2.0 V

VCC

0.2 V

tOFF

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