HT37Q40 datasheet(13/82 Pages) HOLTEK

13 / 82 page

A.C. Characteristics

Ta=25

°C

Symbol

Parameter

Test Conditions

Min.

Typ.

Max.

Unit

VDD

Conditions

fOSC

Oscillator Clock

(Crystal OSC/RC OSC)

2.4V~5.5V

8000

11059

12800

kHz

3.3V~5.5V

8000

11059

12800

3.6V~5.5V

8000

11059

12800

kHz

tWDTOSC Watchdog Oscillator Period

180

130

tRES

External Reset Low Pulse Width

¾¾

tSST

System Start-up Timer Period

Power-up or wake-up from

HALT

1024

tSYS

tLVR

Low Voltage Width to Reset

¾¾

0.25

1.00

2.00

Note: tSYS= 1/fSYS

fSYS=fOSC/2

Characteristics Curves

HT37Q70/60/50/40/30/20

Rev. 1.00

February 17, 2009

R v s . F C h a r t

R ( k W )

1 0

1 2

1 4

1 6

8 2

9 1

1 0 0

1 1 5

1 2 0

1 5 0

1 8 0

3 . 0 V

4 . 5 V

1 0

1 1

1 2

1 3

1 4

1 5

1 6

2 . 6

2 . 8

3 . 0

3 . 2

3 . 4

3 . 6

3 . 8

4 . 0

4 . 2

4 . 4

4 . 6

4 . 8

5 . 0

5 . 2

V v s . F C h a r t ( F o r 3 . 0 V & 4 . 5 V )

V D D ( V )

2 . 4

1 1 . 0 5 9 M H z / 1 1 5 k W ( 3 V )

1 1 . 0 5 9 M H z / 1 0 0 k W ( 4 . 5 V )

HT37Q40 Datasheet(PDF) 13 Page - Holtek Semiconductor Inc

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