STLC3055N

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APPENDIX D

8.1 STLC3055Q STLC3055N compatibility.

STLC3055N is pin to pin compatible with the old STLC3055Q but offer a better performance in term of

Power consumption and can be set in a new gain configuration in order to be compatible with the 3.3V

codec.

8.1.1 Typical power consumption comparison

Table 13.

To meet this result some differences, with a minimum impact on the application, has been introduced in

STLC3055N.

8.1.2 Hardware difference:

■

RX input.

In STLC3055N it is necessary a 100k

AGND to bias the input stage.

■

Rp.

The STLC3055N required a Rp value of 50

■

TTX filter.

To optimize the ttx signal dynamic we have change the values of RLV and CFL;

Table 14.

8.1.3 Parameter differences:

Table 15.

Operative mode

STLC3055Q

STLC3055N

HI-Z

52 - 60mA

13 - 25mA

Active on hook

93 - 115mA

50 - 80mA

Ring (no REN)

120 - 140mA

55 - 90mA

Component

STLC3055Q

STLC3055N

RRX

100k

Ω

Rp

41

Ω

50

Ω

RLV

27k

Ω

16.2k

Ω

CFL

1nF

1.5nF

Parameter

STLC3055Q

STLC3055N

Absolute Max. Rating

17V

13V

Operating Range

15.8V

12V

Typ Metering pulse level (Gs 1)

340mVrms

Typ Metering pulse level (Gs 0)

200mVrms

170mVrms