10

Agere Systems Inc.

Data Sheet

November 2001

with Reverse Battery and PPM

L9217A/G Low-Cost Line Interface

Table 6. Analog Pin Characteristics

off-hook threshold and resistor value is different for active mode versus scan mode (see Applications section for more details).

2. This parameter is not tested in production. It is guaranteed by design and device characterization.

µA to 30 µA.

Table 7. PPM

* PPM signal should be ac-coupled into PPMIN.

Parameter

Min

Typ

Max

Unit

Differential PT/PR Current Sense (DCOUT):

Gain (PT/PR to DCOUT)

121

–100

125

—

129

100

V/A

mV

On- to Off-hook Threshold (scan mode)

Off- to On-hook Threshold (active mode)

8.8

6.0

—

—

13.6

10.2

mA

mA

Ring Trip Comparator:

Internal Voltage Source

—

–9.1

±10

–8.6

—

–8.1

mV

V

µA

RCVN, RCVP:

Input Bias Current

Input Resistance

—

—

–0.2

1

–1

—

µA

M

Ω

Parameter

Min

Typ

Max

Unit

PPM Source*:

Frequency (f1)

Frequency (f2)

Input Signal

11.88

15.80

0

12

16

—

12.12

16.20

0.525

kHz

kHz

Vrms

Signal Gain (from PPMIN to amplifier outputs)

9

10

11

—

Harmonic Distortion

—

5

—

%

Isolation

50

—

—

dB