MC33219A

7

MOTOROLA ANALOG IC DEVICE DATA

CPR

Figure 2. MC33219A Block Diagram and Test Circuit

NOTES: 1. All capacitors are in

µF unless otherwise noted.

2. Values shown are suggested initial values only. See Applications Information for circuit adjustments.

MC34119

Speaker

Amplifier

Receive Input

From 2–4 Wire

Converter

Rx Attenuator

Attenuator Control Circuit

Tx Attenuator

Bias

AGC

Tx

BNM

Dial Tone

Detector

Rx

BNM

0.1

5.1 k

R2

10 k

10 k

0.1

1.0

47

100 k

VCC

100

15

15 k

1.0

100

VB

VB

VTH

0.1

Volume

Control

(See

Figure 28)

VB

Normal

Normal

Mute

Mute

Disable

VLC

CD

GND

VCC

0.47

From

Microphone

Transmit Output

To 2–4 Wire Converter

47

0.1

4.7 k

0.1

5.1 k

300 k

1.0

100 k

VCC

VB

CT

TLO

RXI

6

7

5

17

16

RXO

15

RAI

14

RAO

11

RLI

12

RLO

10

13

24

8

19

18

20

22

21

TAI

MCO

3.0 k

VB

3

CPT

4

TLI

2

XDI

23

TAO

1

CP2

Tx–Rx Comp.

MC33219A

VB

VB

VCC

VB

MCI

R1

Freescale Semiconductor, Inc.

For More Information On This Product,

Go to: www.freescale.com