CS61577 datasheet(4/44 Pages) ETC

4 / 44 page

ANALOG SPECIFICATIONS (TA = -40

°C to 85°C; TV+, RV+ = 5.0V ±5%; GND = 0V)

Parameter

Min

Typ

Max

Units

Receiver

RTIP/RRING Input Impedance

50k

Ω

Sensitivity Below DSX (0dB = 2.4V)

-13.6

500

Loss of Signal Threshold

0.30

Data Decision Threshold

T1, DSX-1

(Note 20)

T1, DSX-1

(Note 21)

T1, (FCC Part 68) and E1 (Note 22)

% of peak

Allowable Consecutive Zeros before LOS

160

175

190

bits

Receiver Input Jitter Tolerance

(Note 23)

10kHz - 100kHz

2kHz

10Hz and below

0.4

6.0

300

Jitter Attenuator

Jitter Attenuation Curve Corner Frequency

(Notes 17, 24)

Attenuation at 10kHz Jitter Frequency

(Notes 17, 24)

Attenuator Input Jitter Tolerance (Before Onset

of FIFO Overflow or Underflow Protection)

(Notes 17, 24)

Notes: 20. For input amplitude of 1.2 Vpk to 4.14 Vpk.

21. For input amplitude of 0.5 Vpk to 1.2 Vpk and from 4.14 Vpk to RV+.

22. For input amplitude of 1.05 Vpk to 3.3 Vpk.

23. Jitter tolerance increases at lower frequencies. See Figure 11.

24. Attenuation measured with input jitter equal to 3/4 of measured jitter tolerance. Circuit attenuates

jitter at 20 dB/decade above the corner frequency. See Figure 12. Output jitter can increase

significantly when more than 12 UI’s are input to the attenuator. See discussion in the text section.

CS61577

DS155PP2

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