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T7507-ML2-D

Quad PCM Codec with Filters, Termination Impedance, and Hybrid Balance

Agere -> LSI Corporation 

T7507 Quad PCM Codec with Filters,

Termination Impedance, and Hybrid Balance

Data Sheet

August 1999

Pin Information (continued)

Table 1. Pin Descriptions (continued)

Pin Symbol Type

Name/Function

7 NTSDC I Not Thermal Shutdown Status Input—L8567 SLIC. Logic level status input from L8567

SLIC indicating if SLIC is in thermal shutdown or normal device operation. This input is

accepted from the latched parallel data output of the SLIC and outputted on the serial

data output bus DO to the microcontroller. This pin is meant to be a shared output among

the four channels associated with the quad T7507, using the EN control to determine

valid data among the four channels.

8 NSTATC

I Not Loop Closure/Not Ring Trip Status Input. Logic level status input from L8567

SLIC indicating loop on-/off-hook status. This input is accepted from the latched parallel

data output of the SLIC and outputted on the serial data output bus DO to the microcon-

troller. This pin is meant to be a shared output among the four channels associated with

the quad T7507, using the EN control to determine valid data among the four channels.

9

B1c

O SLIC State Control. These logic level outputs control the state of the L8567 SLIC. These

10 B0c

pins are meant to be a shared output among the four channels associated with the quad

T7507, using the EN control to determine valid data among the four channels.

11 RD3C O Driver Control. These logic level outputs control the state of an electromechanical relay

12 RD2C

driver on the L8567 SLIC or a solid-state relay contact on the L7583 via the L7583 logic

13 RD1C

control inputs. These pins are meant to be a shared output among the four channels

associated with the quad T7507, using the EN control to determine valid data among the

four channels.

14

VDD

— 5 V Analog Power Supplies. Both pins must be connected on the circuit board.

31

Each pin should be bypassed to ground with at least 0.1 µF of capacitance as close to

the device as possible.

22 VFXIN3 I Voice Frequency Transmitter Input. Analog inverting input to the noninverting opera-

15 VFXIN2

tional amplifier at the transmit filter input. Connect the signal to be digitized to this pin

24 VFXIN1

through a capacitor CI (see Figure 3).

30 VFXIN0

21 AGND3 — Analog Grounds. All ground pins must be connected on the circuit board.

16 AGND2

23 AGND1

29 AGND0

20 VFRON3 O Voice Frequency Receiver Negative Output. This pin can drive 2000 Ω (or greater)

17 VFRON2

loads.

25 VFRON1

28 VFRON0

19 VFROP3 O Voice Frequency Receive Positive Output. This pin can drive 2000 Ω (or greater)

18 VFROP2

loads.

26 VFROP1

27 VFROP0

39 NTSD0

38 NTSD1

36 NTSD2

37 NTSD3

I Not Thermal Shutdown Status Input—L7583 Switch. Logic level status input from

L7583 solid-state switch indicating if switch is in thermal shutdown or normal device

operation. This input is accepted on a per-line basis from the four switches associated

with the quad T7507, and outputted on the serial data output bus DO to the microcontrol-

ler. If unused, tie to ground or 5 V.

6

Lucent Technologies Inc.

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