L8575 datasheet(13/36 Pages) AGERE

13 / 36 page

Advance Data Sheet

L8575

March 1997

Dual-Resistive, Low-Cost SLIC

Lucent Technologies Inc.

Electrical Characteristics (continued)

Transmission

Transmit direction is Tip/Ring to XMT. Receive direction is IRP/VRN to Tip/Ring.

Table 7. Transmission Characteristics

IEEE is a registered trademark of The Institute of Electrical and Electronics Engineers, Inc.

2. Assumes ideal external components.

3. This parameter is not tested in production. It is guaranteed by design and device characterization.

4. Transmission characteristics are speciﬁed assuming a 600

Ω resistive termination; however, feedback using external components allows the

user to adjust the termination impedance from the intrinsic 600

Ω of the feed resistors to most ITU-T recommended complex termination

impedances.

5. Measured with the L8575 SLIC connected per application diagram with ideal external components.

Parameter

Min

Typ

Max

Unit

Longitudinal Balance (

IEEE1 Std. 455—1976)2:

50 Hz—1 kHz

1 kHz—3 kHz

—

Metallic to Longitudinal Balance2:

200 Hz—4 kHz

—

RFI Rejection3:

(0.5 Vrms, 50

Ω source, 30% AM Mod. 1 kHz)

500 kHz—10 MHz

10 MHz—100 MHz

—

–65

–45

dBV

Tip/Ring Signal Level

—

3.17

dBm

ac Termination Impedance4

—

600

—

Ω

Total Harmonic Distortion (200 Hz—4 kHz)3

—

0.3

Transmit Gain (

ƒ = 1 kHz)5:

Tip/Ring to XMT

–0.486

–0.500

–0.514

—

Receive Gain (

ƒ = 1 kHz):

IRP Current to Differential Current Flowing from PT to PR

VRV to IRP

195

0.995

200

205

1.005

—

CBN Gain (

ƒ = 1 kHz):

1 RGBN Current to Current Flowing

CBN to RGBN

–49.5

0.995

–50

–50.5

1.005

—

Gain vs. Frequency (transmit & receive; 1 kHz reference)3:

200 Hz—3.4 kHz

–0.1

0.1

Gain vs. Level (transmit & receive; 0 dBV reference)3:

–50 dB to +3 dB

–0.05

0.05

Interchannel Crosstalk3:

200 Hz—3.4 kHz

—

Idle-channel Noise (Tip/Ring; 600

Ω termination):

Psophometric3

C-message

3 kHz ﬂat3

—

–77

dBmp

dBrnC

dBrn

Idle-channel Noise (XMT; 600

Ω termination):

Psophometric3

C-message

3 kHz ﬂat3

—

–77

dBmp0

dBrnC0

dBrn0

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