Si2403
Table 2. DAA Loop Characteristics
(V
D
= 3.0 to 3.6 V, T
A
= 0 to 70 °C for K-Grade
)
Parameter
DC Termination Voltage
DC Termination Voltage
DC Termination Voltage
DC Termination Voltage
DC Termination Voltage
DC Termination Voltage
DC Termination Voltage
DC Termination Voltage
On-Hook Leakage Current
Operating Loop Current
Operating Loop Current
DC Ring Current
2
Ring Detect Voltage
3
Ring Detect Voltage
3
Ring Frequency
Ringer Equivalence Number
4
Symbol
V
TR
V
TR
V
TR
V
TR
V
TR
V
TR
V
TR
V
TR
I
LK
I
LP
I
LP
Test Condition
I
L
= 20 mA, ACT
1
= 1
DCT = 11 (CTR21)
I
L
= 42 mA, ACT = 1
DCT = 11 (CTR21)
I
L
= 50 mA, ACT = 1
DCT = 11 (CTR21)
I
L
= 60 mA, ACT = 1
DCT = 11 (CTR21)
I
L
= 20 mA, ACT = 0
DCT = 01 (Japan)
I
L
= 100 mA, ACT = 0
DCT = 01 (Japan)
I
L
= 20 mA, ACT = 0
DCT = 10 (FCC)
I
L
= 100 mA, ACT = 0
DCT = 10 (FCC)
V
TR
= –48 V
FCC/Japan Modes
CTR21
DC flowing through
ring detection circuitry
Min
—
—
—
40
—
9
—
9
—
13
13
—
11
17
15
—
Typ
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Max
7.5
14.5
40
—
6.0
—
7.5
—
7
120
60
7
22
33
68
0.2
Unit
V
V
V
V
V
V
V
V
μA
mA
mA
µA
V
rms
V
rms
Hz
V
RD
V
RD
F
R
REN
RT = 0
RT = 1
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
SILABS [ SILICON LABORATORIES ]
