4

WL800

ELECTRICAL CHARACTERISTICS

These characteristics are guaranteed over the following conditions (unless otherwise stated):

T

= 2.7V to 3.6V

Characteristic

Value

Unit

Condition

MIN

TYP

MAX

Supply current (total)

Transmit

37

50

mA

Receive

35

50

mA

Supply current in standby

3

5

mA

PROGRAMMING INPUTS

Logic low voltage

0

0.4

V

Logic high voltage

0.8Vcc

Vcc

V

Input current

1

µA

Input level high

Data clock frequency (1/tclock)

20

MHz

See Fig. 2

Data/Enable set up time (t set up)

10

ns

See Fig. 2

Enable hold time (t enable)

10

ns

See Fig. 2

Positive clock pulse width (tp)

20

ns

See Fig. 2

Negative clock pulse width (t neg)

20

ns

See Fig. 2

STANDBY INPUT

Logic low input voltage

0

0.8

V

Circuit powered down

Logic high input voltage

Vcc -0.7

Vcc

V

Circuit powered up

Input current

100

150

µA

Circuit powered up

-150

µA

Circuit powered down

Standby to operate time

3

µs

*References operational (see note 1)

TX/RX INPUT

Logic low input voltage

0

0.8

V

Receive mode

Logic high input voltage

Vcc -0.7

Vcc

V

Transmit mode

Input current

10

µA

REFERENCE OUTPUT

Reference output frequency

20

MHz

With 20MHz crystal

Reference clock output voltage

200

250

300

mVp-p

With 15pF load

Reference output impedance

600

Ohms

Mark Space ratio

-2%

50/50

+2%

With 15pF load

Rise time

15

ns

Fall time

15

ns

Crystal Drive Levels required

200

mV

Pins 22,23 differential