Preliminary Data Sheet
October 2001
Low-Cost Ringing SLIC
L9214A/G
Agere Systems Inc.
17
Electrical Characteristics
(continued)
Table 10. Two-Wire Port
* Values guaranteed by design, not subject to production test.
Corresponds to 55 dB minimum with 1%, 30
resistors per Q552 (11/96) Section 2.1.2 and
IEEE
455.
Parameter
Min
72
37
5
8.5
Typ
—
—
—
15
Max
—
—
—
—
Unit
mApeak
mApeak
mArms
mArms
Tip or Ring Drive Current = dc + Longitudinal + Signal Currents
Tip or Ring Drive Current = Ringing + Longitudinal
Signal Current
Longitudinal Current Capability per Wire (Longitudinal current is indepen-
dent of dc loop current.)
Ringing Current (R
LOAD
= 2330
+ 24
μ
F)
Ringing Current (R
LOAD
= 3500
+ 1.8
μ
F)
Ringing Current Limit (R
LOAD
= 100
)
dc Loop Current
—
I
LIM
(R
LOOP
= 500
):
Programming Range (V
CC
= 5.0 V)
Programming Range (V
CC
= 3.3 V)
dc Current Variation (current limit 15 mA to 45 mA)
dc Loop Current (R
LOOP
= 100
, on to off hook transition)
t < 20 ms
dc Loop Current (R
LOOP
= 100
, on to off hook transition)
t < 50 ms
dc Feed Resistance, 2 x R
F
(excluding protection resistors)
Loop Resistance Range*, (0 dB overload into 600
)
I
LOOP
= 20 mA, V
BAT2
=
–
24 V, 50
(2 x R
F
), 60
(2 x R
P
), 300
R
LOOP
plus
Handset
I
LOOP
= 25 mA, V
BAT1
=
–
65 V, 50
(2 x R
F
), 60
(2 x R
P
), 1000
R
LOOP
plus Handset
Open Loop Voltages, |V
BAT1
| =
–
63 V to
–
70 V:
Scan/On-Hook Transmission Mode:
|PT
–
PR|
–
Differential
|PT| or |PR| Referenced to BGND
Ring Mode, |V
BAT1
| =
–
63 V to
–
70 V:
|PT
–
PR|
–
Differential, (open loop ring voltage)
Loop Closure Threshold:
Scan/Active/On-hook Transmission Modes
Loop Closure Threshold Hysteresis:
Ground Key:
Differential Detector Threshold
Detection
Longitudinal to Metallic Balance at PT/PR
Test Method per Figure 8, 1 kHz
58 dB minimum, 60 dB typical:
300 Hz to 600 Hz
600 Hz to 3.4 kHz
Metallic to Longitudinal (harm) Balance:
200 Hz to 1000 Hz
100 Hz to 4000 Hz
PSRR 500 Hz
—
3000 Hz:
V
BAT1
, V
BAT2
V
CC
(3.3 V operation)
25
12
—
—
—
—
—
—
90
mApeak
mApeak
mApeak
15
15
—
—
—
—
—
25
—
—
—
—
—
—
—
36
45
35
±10
350
100
—
150%
50
mA
mA
%
mApeak
mA
I
LIM
840
1540
—
—
—
—
42.5
—
48
—
—
56.5
V
V
40
—
—
Vrms
—
—
10
2
—
—
mA
mA
5
50
8
—
10
—
mA
ms
55
55
58
58
—
—
dB
dB
40
40
—
—
—
—
dB
dB
40
25
—
—
—
—
dB
dB