ISM 433/315 MHz FSK/ASK Transmitter – Data Sheet

AS3901

Rev. 6, August 2000

Page 11 of 18

2.4 Digital Pin Characteristics

Symbol Parameter

Conditions

Min

Typ

Max

Units

Note

CLK (µC clock output)

VOH

High level output voltage IOH = -1 mA

VDD-0.7

-

VDD

V

VOL

Low level output voltage

IOL = 1 mA

GND

-

1.2

V

tr

Rise time

CLoad = 10 pF

20

ns

td

Fall time

CLoad = 10 pF

20

ns

jcc

Cycle to cycle jitter

+/-5

%

1)

NRES (Inverted reset output)

VOH

High level output voltage IOH = -1 mA

VDD-0.3

-

VDD

V

VOL

Low level output voltage

IOL = 1 mA

GND

-

0.2

V

tr

Rise time

CLoad = 10 pF

20

ns

td

Fall time

CLoad = 10 pF

20

ns

TX/ASK (Driving amplifier and FSK modulator on/off (ASK) input)

VIH

High level input voltage

VDD-0.5

-

VDD

V

VIL

Low level input voltage

GND

-

0.3

V

IIH

High level input current

VIH = VDD

1

IIL

Low level input current

VIL = 0 V.

internal pull-up

-40

µA

DATA (FSK data input)

VIH

High level input voltage

VDD-0.5

-

VDD

V

VIL

Low level input voltage

GND

-

0.3

V

IIH

High level input current

VIH = VDD

1

µA

IIL

Low level input current

VIL = 0 V

-1

µA