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SI2403-FT

V.22BIS ISOMODEM® CHIPSET WITH ERROR CORRECTION

Silicon Laboratories 

Si2403

Table 2. DAA Loop Characteristics

(VD = 3.0 to 3.6 V, TA = 0 to 70 °C for K-Grade)

Parameter

DC Termination Voltage

Symbol

Test Condition

Min

Typ

Max

Unit

VTR

IL = 20 mA, ACT1 = 1

—

—

7.5

V

DCT = 11 (CTR21)

DC Termination Voltage

VTR

IL = 42 mA, ACT = 1

—

DCT = 11 (CTR21)

—

14.5

V

DC Termination Voltage

VTR

IL = 50 mA, ACT = 1

—

—

40

V

DCT = 11 (CTR21)

DC Termination Voltage

VTR

IL = 60 mA, ACT = 1

40

—

—

V

DCT = 11 (CTR21)

DC Termination Voltage

VTR

IL = 20 mA, ACT = 0

—

—

6.0

V

DCT = 01 (Japan)

DC Termination Voltage

VTR IL = 100 mA, ACT = 0

9

—

—

V

DCT = 01 (Japan)

DC Termination Voltage

VTR

IL = 20 mA, ACT = 0

—

—

7.5

V

DCT = 10 (FCC)

DC Termination Voltage

VTR IL = 100 mA, ACT = 0

9

—

—

V

DCT = 10 (FCC)

On-Hook Leakage Current

Operating Loop Current

Operating Loop Current

DC Ring Current2

Ring Detect Voltage3

Ring Detect Voltage3

Ring Frequency

Ringer Equivalence Number4

ILK

VTR = –48 V

—

—

7

μA

ILP

FCC/Japan Modes

13

—

120

mA

ILP

CTR21

13

—

60

mA

DC flowing through

—

—

7

µA

ring detection circuitry

VRD

VRD

FR

REN

RT = 0

RT = 1

11

—

22

Vrms

17

—

33

Vrms

15

—

68

Hz

—

—

0.2

Notes:

1. ACT = U67, bit 5; DCT = U67, bits 3:2; RT = U67, bit 0; RZ = U67, bit 1.

2. R25 and R26 installed.

3. The ring signal is guaranteed to not be detected below the minimum. The ring signal is guaranteed to be detected

above the maximum.

4. C15, R14, Z2, and Z3 not installed. RZ = 0.

Rev. 1.2

5

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