Si3226/7

Si3208/9

8

Preliminary Rev. 0.33

Table 5. Linefeed Characteristics

Parameter

Symbol

Test Condition

Min

Typ

Max

Unit

Maximum Loop Resistance

—

—

2000

Ω

DC Loop Current Accuracy

—

—

10

%

DC Open Circuit Voltage

Accuracy

——

4

V

DC Differential Output

Resistance

160

—

640

Ω

DC On-Hook Voltage

Accuracy—Ground Start

——

4

V

DC Output

Resistance—Ground Start

160

—

640

Ω

DC Output Resistance—

Ground Start

TIP to ground

400

—

—

k

Ω

Loop Closure Detect

Threshold Accuracy

—

—

10

%

Ground Key Detect

Threshold Accuracy

—

—

10

%

Ring Trip

Threshold Accuracy

AC detection,

——

4

mA

DC detection,

——

1

mA

DC Detection,

——

3

mA

Ringing Amplitude

108

—

—

99

—

—

133

—

—

121

—

—

Sinusoidal Ringing Total

Harmonic Distortion

—2

—

%

Ringing Frequency Accuracy

f = 16 Hz to 100 Hz

—

—

1

%

Ringing Cadence Accuracy

Accuracy of ON/OFF times

—

—

50

ms

Calibration Time

↑CAL to ↓CAL bit

—

—

TBD

ms

Loop Voltage Sense

Accuracy

Accuracy of boundaries for

each output Code;

—2

4

%

*Note: Ringing amplitude is set for 93 V peak and measured at TIP-RING using no series protection resistance.