Symbol

Parameter

Test Conditions

Min.

Typ.

Max.

Unit

Conditions

²H² Input Voltage

¾¾

¾

V

²L² Input Voltage

¾¾

0

¾

V

Oscillator Frequency

100

¾

kHz

TE Pull-low Resistance

5V

¾

1.5

3

MW

Resistance

¾

1.5

3

MW

Functional Description

Operation

The 3

able (TE for the HT600/HT640/HT680 or D12~D17 for the HT6187/HT6207/HT6247, active high).

This cycle will repeat itself as long as the transmission enable (TE or D12~D17) is held high. Once

the transmission enable falls low, the encoder output completes its final cycle and then stops as

shown below.

Information word

An information word consists of 4 periods as shown:

5

July 8, 1999

3 w o r d s

3 w o r d s

E n c oder

Da t a O u t

T r ans m i t t e d

C ont i nuo us l y

< 1 w o r d

TE o r

D 12~ D 17

Transmission timing

P i l o t per i o d

(6 b i t s )

A ddr es s c ode per i od

D a t a c ode per i o d

1/ 6 bi t

S y nc . per i o d

Composition of information