SI3233 datasheet(64/100 Pages) SILABS

64 / 100 page

Si3233

Preliminary Rev. 0.5

Reset settings = 0110_0001

Bit

D7D6D5D4D3D2

Name

SQH

CBY

ETBE

ETBO[1:0]

ETBA[1:0]

Type

R/W

Bit

Name

Function

Reserved

Read returns zero.

6SQH

Audio Squelch.

0 = No squelch.

1 = STIPAC and SRINGAC pins squelched.

5CBY

Capacitor Bypass.

0 = Capacitors CP (C1) and CM (C2) in circuit.

1 = Capacitors CP (C1) and CM (C2) bypassed.

4ETBE

External Transistor Bias Enable.

0 = Bias disabled.

1 = Bias enabled.

3:2

ETBO[1:0]

External Transistor Bias Levels—On-Hook Transmission State.

DC bias current which flows through external BJTs in the on-hook transmission state.

Increasing this value increases the compliance of the ac longitudinal balance circuit.

00 = 4 mA

01 = 8 mA

10 = 12 mA

11 = Reserved

1:0

ETBA[1:0]

External Transistor Bias Levels—Active Off-Hook State.

DC bias current which flows through external BJTs in the active off-hook state. Increasing

this value increases the compliance of the ac longitudinal balance circuit.

00 = 4 mA

01 = 8 mA

10 = 12 mA

11 = Reserved

SI3233 Datasheet(PDF) 64 Page - Silicon Laboratories

SI3233 Datasheet(HTML) 64 Page - Silicon Laboratories

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