BT8376EPF datasheet(183/323 Pages) CONEXANT

Part #	BT8376EPF

Description	single chip transceivers for T1/E1 and Integrated Service Digital Network (ISDN) primary rate interfaces

PDF	323 Pages

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Manufacturer	CONEXANT [Synaptics Incorporated.]

Direct Link	https://www.synaptics.com/

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Bt8370/8375/8376

Fully Integrated T1/E1 Framer and Line Interface

3.11 Transmit LIU Registers

N8370DSE

Conexant

3-65

LBO[1:0]

Select Line Build Out—Up to three LBO networks can be placed in line with the transmitter to

attenuate XTIP/XRING outputs in 7.5 dB steps, per the signal transfer function defined by

FCC Part 68 regulations. (Refer to Figure 2-41 through Figure 2-44 for LBO isolated pulse

templates, which are applicable only while PULSE[2:0] = 111).

Table 3-14. Return Loss Values

TURNS

TERM

RTERM

RL (dB)

VPK

(Normalized)

Remarks

Pulse[2:0] = 75

Ω Cable Selection

None

1.00

Iout scaled for 1:1.36

51.1

–18

1.00

Compromise match

40.5

–65

0.89

Impedance match

None

1.00

Iout scaled for 1:1.15

Pulse[2:0] = 100

Ω Cable Selection

None

1.00

Iout scaled for 1:1.36

51.1

–32

1.00

Compromise match

54.1

–76

1.03

Impedance match

None

1.00

Iout scaled for 1:1.15

Pulse[2:0] = 120

Ω Cable Selection

None

1.00

Iout scaled for 1:1.36

51.1

–18

1.00

Compromise match

64.9

–74

1.13

Impedance match

None

1.00

Iout scaled for 1:1.15

LBO

Attenuation @ 772 kHz

FCC Option

0.0 dB

Option A

7.5 dB

Option B

15.0 dB

Option C

22.5 dB

Final Span Target Loss

BT8376EPF Datasheet(PDF) 183 Page - Synaptics Incorporated.

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