Si32172/3/5

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Rev. 1.0 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • August 31, 2021

Table 4. Linefeed Characteristics for FXS

TA = 0 to 70 °C (F grade) or –40 to +85 °C (G grade) unless otherwise noted.

Parameter

Symbol

Test Condition

Min

Typ

Max

Unit

Maximum Loop Resistance

RLOOP

RDC,MAX =430 

ILOOP =18mA, VBAT =–52 V,

RPROT =0 

—

—

2000



DC Feed Current

Differential

—

—

45

mA

Common Mode

—

—

30

mA

Differential + Common Mode

—

—

45

mA

DC Loop Current Accuracy

ILIM =18mA

—

—

10

%

DC Open Circuit Voltage

Accuracy

Active Mode; VOC =48V,

VTIP – VRING

——

4

V

DC Differential Output

Resistance

RDO

ILOOP < ILIM

160

—

640



DC On-Hook Voltage

Accuracy—Ground Start

VOHTO

IRING<ILIM; VRING wrt ground,

VRING =–51 V

——

4

V

DC Output

Resistance—Ground Start

RROTO

IRING<ILIM; RING to ground

160

—

640



DC Output Resistance—

Ground Start

RTOTO

TIP to ground

400

—

—

kW

Loop Closure Detect

Threshold Accuracy

ITHR =13mA

—

—

10

%

Ground Key Detect

Threshold Accuracy

ITHR =13mA

—

—

10

%

Ring Trip

Threshold Accuracy

AC detection,

VRING = 70 Vpk, no offset,

ITH =80mA

——

4

mA

DC detection,

20 V dc offset, ITH =13mA

——

1

mA

DC Detection,

48 V DC offset, Rloop = 1500 

——

3

mA

Ringing Amplitude*

VRINGING

Si32172/5 Open circuit,

VBAT =–110V

108

—

—

VPK

Si32173 Open circuit,

VBAT =–140V

132

—

—

VPK

Sinusoidal Ringing Total

Harmonic Distortion

RTHD

Si32172/5 : 60 VRMS,

15 VOFFSET, 0–5 REN

—1

—

%

Si32173 : 55 VRMS,

48 VOFFSET, 0–5 REN

Ringing Frequency Accuracy

f = 16 Hz to 60 Hz

—

—

1

%

Ringing Cadence Accuracy

Accuracy of ON/OFF times

—

—

50

ms

Loop Voltage Sense

Accuracy

VTIP – VRING =48V

—

2

4

%