Silicon Laboratories ISOMODEM Si2401, Manual

Page: 5 / 74

Si2401
Preliminary Rev. 0.9 5
Table 2. Loop Characteristics
(V
D
=
3.0 to 3.6 V, T
A
=
0 to 70 °C for F-Grade, see Figure 1 on page 6)
Parameter Symbol Test Condition Min Typ Max Unit
DC Termination Voltage V
TR
I
L
= 20 mA, ILIM = 0
DCV = 00, MINI = 11, DCR = 0
— — 6.0 V
DC Termination Voltage V
TR
I
L
= 120 mA, ILIM = 0
DCV = 00, MINI = 11, DCR = 0
9 — — V
DC Termination Voltage V
TR
I
L
= 20 mA, ILIM = 0
DCV = 11, MINI = 00, DCR = 0
— — 7.5 V
DC Termination Voltage V
TR
I
L
= 120 mA, ILIM = 0
DCV = 11, MINI = 00, DCR = 0
9 — — V
DC Termination Voltage V
TR
I
L
= 20 mA, ILIM = 1
DCV = 11, MINI = 00, DCR = 0
— — 7.5 V
DC Termination Voltage V
TR
I
L
= 60 mA, ILIM = 1
DCV = 11, MINI = 00, DCR = 0
40 — — V
DC Termination Voltage V
TR
I
L
= 50 mA, ILIM = 1
DCV = 11, MINI = 00, DCR = 0
— — 40 V
On-Hook Leakage Current I
LK
V
TR
= –48 V — — 5 µA
Operating Loop Current I
LP
MINI = 00, ILIM = 0 10 — 120 mA
Operating Loop Current I
LP
MINI = 00, ILIM = 1 10 — 60 mA
DC Ring Current dc current flowing through ring
detection circuitry
— 1.5 3 µA
Ring Detect Voltage
*
V
RD
RT = 0 13.5 15 16.5 V
RMS
Ring Detect Voltage
*
V
RD
RT = 1 19.35 21.5 23.65 V
RMS
Ring Frequency F
R
15 — 68 Hz
Ringer Equivalence Number REN — — 0.2
*Note: The ring signal is guaranteed to not be detected below the minimum. The ring signal is guaranteed to be detected
above the maximum.