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ATTL7554BP

L7554 Low-Power SLIC

Agere -> LSI Corporation 

Data Sheet

March 1997

L7554 Low-Power SLIC

Applications (continued)

ac Design (continued)

ac equivalent circuits using a T7513 Codec are shown in Figures 32 and 33.

RX

VGSX

ZT/R RP PT 40 Ω

+ IT/R

VS

ZT VT/R

–

RP PR 40 Ω

AV = 1

AV = –1

– –0.4 V/mA

RT2

+

VITR

RCVN

RT1

RHB1

AV = 4

RCVP

RRCV

RG

VFXIN

–

VFXIP +

VFR

(PWROP)

ATTL77556544 SSLLIICC

Figure 32. ac Equivalent Circuit Not Including Spare Op Amp

T7513 CODEC

12-2554.a (C)

ZT/R RP PT 40 Ω

VS

+ IT/R

ZT VT/R

–

RP PR 40 Ω

ZT5

– –0.4 V/mA

+

VITR

RT4

–

SN

AGND +

RCVN

AV = 1

AV = 4

RCVP

XMT

RT3

RT6

RHB1

RRCV

RGN

AV = –1

L7554 SLIC

RX

VFXIN

–

VFXIP

+

VFR

(PWROP)

VGSX

T7513 CODEC

Figure 33. ac Equivalent Circuit Including Spare Op Amp

12-3013 (C)

Lucent Technologies Inc.

25

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