L9214A/G
Low-Cost Ringing SLIC
Preliminary Data Sheet
October 2001
Electrical Characteristics (continued)
Table 10. Two-Wire Port
Parameter
Tip or Ring Drive Current = dc + Longitudinal + Signal Currents
Tip or Ring Drive Current = Ringing + Longitudinal
Signal Current
Min
72
37
5
Typ
—
Max
—
Unit
mApeak
mApeak
mArms
mArms
—
—
—
—
Longitudinal Current Capability per Wire (Longitudinal current is indepen-
dent of dc loop current.)
8.5
15
—
Ringing Current (RLOAD = 2330 Ω + 24 µF)
Ringing Current (RLOAD = 3500 Ω + 1.8 µF)
Ringing Current Limit (RLOAD = 100 Ω)
25
12
—
—
—
—
—
—
90
mApeak
mApeak
mApeak
dc Loop Current—ILIM (RLOOP = 500 Ω):
Programming Range (VCC = 5.0 V)
Programming Range (VCC = 3.3 V)
15
15
—
—
45
35
mA
mA
dc Current Variation (current limit 15 mA to 45 mA)
—
—
±10
%
dc Loop Current (RLOOP = 100 Ω, on to off hook transition)
t < 20 ms
—
—
—
—
350
100
mApeak
mA
dc Loop Current (RLOOP = 100 Ω, on to off hook transition)
t < 50 ms
—
—
—
—
—
150%
ILIM
dc Feed Resistance, 2 x RF (excluding protection resistors)
25
36
50
Ω
Loop Resistance Range*, (0 dB overload into 600 Ω)
ILOOP = 20 mA, VBAT2 = –24 V, 50 Ω (2 x RF), 60 Ω (2 x RP), 300 Ω RLOOP plus 840
Handset
—
—
—
—
Ω
Ω
ILOOP = 25 mA, VBAT1 = –65 V, 50 Ω (2 x RF), 60 Ω (2 x RP), 1000 Ω RLOOP
1540
plus Handset
Open Loop Voltages, |VBAT1| = –63 V to –70 V:
Scan/On-Hook Transmission Mode:
|PT – PR| – Differential
42.5
—
48
—
—
56.5
V
V
|PT| or |PR| Referenced to BGND
Ring Mode, |VBAT1| = –63 V to –70 V:
|PT – PR| – Differential, (open loop ring voltage)
40
—
—
Vrms
Loop Closure Threshold:
Scan/Active/On-hook Transmission Modes
—
—
10
2
—
—
mA
mA
Loop Closure Threshold Hysteresis:
Ground Key:
Differential Detector Threshold
Detection
5
50
8
—
10
—
mA
ms
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
55
55
58
58
—
—
dB
dB
600 Hz to 3.4 kHz
Metallic to Longitudinal (harm) Balance:
200 Hz to 1000 Hz
100 Hz to 4000 Hz
40
40
—
—
—
—
dB
dB
PSRR 500 Hz—3000 Hz:
VBAT1, VBAT2
VCC (3.3 V operation)
40
25
—
—
—
—
dB
dB
* Values guaranteed by design, not subject to production test.
† Corresponds to 55 dB minimum with 1%, 30 Ω resistors per Q552 (11/96) Section 2.1.2 and IEEE 455.
®
Agere Systems Inc.
17
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