Analog Integrated Circuit Device Data

8

Freescale Semiconductor

33199

ELECTRICAL CHARACTERISTICS

TIMING DIAGRAMS

TIMING DIAGRAMS

Figure 4. TXD to DIA AC Characteristic

Figure 5. DIA to TxD and L to LO AC Characteristics

.

Figure 6. Current Source I1 AC Characteristics

At static HIGH or LOW level TXD, the current source I1 delivers a current of 3mA (typ). Only during LOW to HIGH transition,

does this current increase to a higher value in order to charge the K Line capacitor (Cl<4nF) in a short time.

tBIT

TXD Input

Signal

0V

5V

DIA Output

Signal

10V

2V

tDDR

tDDF

+5V

+12V

REF-OUT

REF-IN-L

REF-IN-K

TxD

I1

DIA

GND

Input

Signal

Test

Point

1nF

VCC VBAT

tBIT

DIA and L

0V

12V

RXD ot LO

Output

4.5V

0.4V

tRDR / tLDR

tRDF / tLDF

Input Signal

Signal

+5V

+12V

REF-OUT

REF-IN-L

REF-IN-K

TXD

L

DIA

GND

Input

Signal

Test

Points

VCC

VBAT

LO

RXD

2K

2x30pF

120mA

40mA

4mA

2mA

Typical I1

Waveform

Current Source I1

Maximum Limit

Current Source I1

Minimum Limit

TXD Signal

0V

5V

tBIT

tI1F

tI1H

tI1R