MC33121P Просмотр технического описания (PDF) - Motorola => Freescale

Номер в каталоге

Компоненты Описание

производитель

MC33121P

Low Voltage Subscriber / Loop Interface Circuit (SLIC)

Motorola => Freescale 

20 VCC

VDD 15

+ 5.0 V

IL

TIP

VL RL

RING

IEP

0.01

RP

100 RC

1.0 k

RS

9.1 k

RS

9.1 k

RC

RP 1.0 k

0.01 100

19

EP

18

BP

17

CP

16

TSI

5

RSI

4

CN

3

BN

2

EN

1

VEE

– 24 V

Components shown for a 600 Ω system.

Three grounds are connected directly together.

MC33121

ST2/PDI 12

ST1 13

PDI/ST2

CT

0.1

ST1

VDG 14

VAG 9

RXI 10

RFO 8

TXO 11

CF 7

VQB 6

IRXI

RRX

RRF

RRO 30.9 k

4.7 k 20.3 k

RECEIVE

IN (VRXI)

CRO

1.0 µF

TRANSMIT

OUT (VTX)

2.0 k 1.0 µF

+10.13 dB

301 CCF

1.0 µF

20

CQB (10 µF)

Figure 1. Test Circuit

368

VCM 0.01%

TIP

2.0 µF

368

0.01%

RING

1.0 Vrms

MC33121 TEST CIRCUIT

(FIGURE 1)

VTX

V4

4–Wire Balance = 20 (log V4/VCM)

2–Wire Balance = 20 (log V2/VCM)

V2

0 dB DIFF.

AMPLIFIER

Figure 2. Longitudinal Balance Test

(Per IEEE–455)

368

0.01%

TIP

MC33121 TEST CIRCUIT

(FIGURE 1)

VB

368

RING

0.01%

Signal Balance = 20 (log VB/Vin)

Figure 3. Signal Balance Test

VRXI

Vin

0 dBm

1.0 kHz

MOTOROLA

MC33121

5

Share Link: