L8575 查看數據表（PDF） - Agere -> LSI Corporation

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L8575

Dual-Resistive, Low-Cost Subscriber Line Interface Circuit (SLIC)

Agere -> LSI Corporation 

Advance Data Sheet

March 1997

Preliminary Pin Information

L8575

Dual-Resistive, Low-Cost SLIC

RDDB

RDRB

RDTB

RTPB

RTNB

XMTB

TSB

RSB

RGBNB

VRNB

IRPB

6 5 4 3 2 1 44 43 42 41 40

7

39

8

38

9

37

10

36

11

35

12

L8575

34

13

33

14

32

15

31

16

30

17

29

18 19 20 21 22 23 24 25 26 27 28

RDDA

RDRA

RDTA

RTPA

RTNA

XMTA

TSA

RSA

RGBNA

VRNA

IRPA

Figure 2. 44-Pin PLCC Pinout

12-3364(F)

Table 1. Pin Descriptions

Pin Symbol Type

1 NC —

2 DO O

3 DI

I

4 CFLTB I/O

5 VDDD —

6 DGND —

7 RDDB O

8 RDRB O

9 RDTB O

10 RTPB I

Name/Function

No Connect. Unused pin (no internal connection).

Serial Data Output. Data in the internal 8-bit serial shift register is shifted out on this logic

output with the clock signal on pin CLK.

Serial Data Input. Data on this logic input is shifted into the 8-bit serial shift register with

the clock signal on pin CLK.

Fault Filter (Channel B). Connect a 0.1 µF capacitor from CFLTB to AGND. This capaci-

tor filters Tip/Ring transients from the channel B fault detector.

5 V Digital dc Supply. 5 V supply for logic and relay driver flyback diodes.

Digital Ground. Ground for channel B relay drivers.

Disconnect Relay Driver (Channel B). This output drives the external relay.

Ringing Relay Driver (Channel B). This output drives an external ringing relay.

Test Relay Driver (Channel B). This output drives an external test relay.

Ring-Trip Positive (Channel B). Positive sense input for the ring-trip detector.

Lucent Technologies Inc.

5

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