Agere Communications Inc.

13

Data Sheet

September 2001

L7585F Full-Feature, Low-Power SLIC and Switch

Transmit direction is tip/ring to VTX. Receive direction is RCVP(N) to tip/ring.

Table 8. Transmission Characteristics

1. Set by external components in conjunction with the T7531A/T7536 codecs. Any complex impedance R1 + R2 || C between 200

Ω and

1200

Ω can be synthesized.

2. Return loss and transhybrid loss are functions of device gain accuracies and the external hybrid circuit. Guaranteed performance assumes

1% tolerance external resistors and capacitors.

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

4. VTX gain depends on the resistor RGX1 from pin VITR to pin ITR. This gain assumes an ideal 8250

Ω, the recommended value. Positive cur-

rent is defined as the differential current flowing from PT to PR. The transmit signal at VTX is measured with respect to pin VRTX.

Parameter

Min

Typ

Max

Unit

200

—1200

Ω

200 Hz—500 Hz

500 Hz—3400 Hz

25

29

—

—

—

—

dB

dB

Off-hook

On-hook

—

—

—

—

0.3

1

%

%

PT/PR Current to (VTX—VRTX)

–291

–300

–309

V/A

Receive Gain (f = 1 kHz):

(RCVP—RCVN) to (PT—PR)

1.94

2

2.06

—

(600

Ω termination; 1 kHz reference):

200 Hz—300 Hz

300 Hz—3.4 kHz

3.4 kHz—20 kHz

20 kHz—266 kHz

–0.3

–0.05

–3.0

—

0

0

0

—

0.05

0.05

0.05

2.0

dB

dB

dB

dB

–50 dB to +3 dB

–0.05

0

0.05

dB

200 Hz—500 Hz

500 Hz—3400 Hz

25

29

—

—

—

—

dB

dB

Idle-channel Noise (tip/ring; 600

Ω termination):

Psophometric

C-message

3 kHz Flat

—

—

—

—

—

—

–77

13

20

dBmp

dBrnC

dBrn

Idle-channel Noise ((VTX—VRTX); 600

Ω termination):

Psophometric

C-message

3 kHz Flat

—

—

—

—

—

—

–77

13

20

dBmp0

dBrnC0

dBrn0

EMC, per EN 300 386-2 and EN61000-4-6 (3 Vrms, 80% mod-

ulation, 105 kHz—80 MHz, 150

—

—

–40

dBm, 600

Ω