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L9214A

Low-Cost Ringing SLIC

Agere -> LSI Corporation 

Preliminary Data Sheet

October 2001

L9214A/G

Low-Cost Ringing SLIC

Electrical Characteristics (continued)

Table 10. Two-Wire Port

Parameter

Min Typ

Tip or Ring Drive Current = dc + Longitudinal + Signal Currents

72

—

Tip or Ring Drive Current = Ringing + Longitudinal

37

—

Signal Current

5

—

Longitudinal Current Capability per Wire (Longitudinal current is indepen-

dent of dc loop current.)

8.5 15

Ringing Current (RLOAD = 2330 Ω + 24 µF)

25

—

Ringing Current (RLOAD = 3500 Ω + 1.8 µF)

12

—

Ringing Current Limit (RLOAD = 100 Ω)

—

—

dc Loop Current—ILIM (RLOOP = 500 Ω):

Programming Range (VCC = 5.0 V)

Programming Range (VCC = 3.3 V)

15

—

15

—

dc Current Variation (current limit 15 mA to 45 mA)

—

—

dc Loop Current (RLOOP = 100 Ω, on to off hook transition)

t < 20 ms

—

—

—

—

dc Loop Current (RLOOP = 100 Ω, on to off hook transition)

t < 50 ms

—

—

—

—

dc Feed Resistance, 2 x RF (excluding protection resistors)

25 36

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

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

|PT| or |PR| Referenced to BGND

42.5 48

—

—

Ring Mode, |VBAT1| = –63 V to –70 V:

|PT – PR| – Differential, (open loop ring voltage)

40

—

Loop Closure Threshold:

Scan/Active/On-hook Transmission Modes

— 10

Loop Closure Threshold Hysteresis:

—

2

Ground Key:

Differential Detector Threshold

Detection

5

8

50

—

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

55 58

55 58

Metallic to Longitudinal (harm) Balance:

200 Hz to 1000 Hz

100 Hz to 4000 Hz

40

—

40

—

PSRR 500 Hz—3000 Hz:

VBAT1, VBAT2

VCC (3.3 V operation)

40

—

25

—

* 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.

Max Unit

— mApeak

— mApeak

— mArms

— mArms

— mApeak

— mApeak

90 mApeak

45

35

±10

350

100

—

150%

50

mA

mA

%

mApeak

mA

ILIM

Ω

—

Ω

—

Ω

—

V

56.5

V

—

Vrms

—

mA

—

mA

10

mA

—

ms

—

dB

—

dB

—

dB

—

dB

—

dB

—

dB

Agere Systems Inc.

17

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