L9216A データシートの表示（PDF） - Agere -> LSI Corporation
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L9216A Datasheet PDF : 48 Pages
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Preliminary Data Sheet
September 2001
L9216A/G
Short-Loop Ringing SLIC with Ground Start
Pin Information (continued)
Table 1. Pin Descriptions
28-Pin
PLCC
1
48-Pin
MLCC
43
Symbol
NSTAT
2
45
VITR
3
47
RCVP
4
48
RCVN
5
1
RINGIN
6
6
DCOUT
7
7
VPROG
8
9
CF2
9
10
CF1
10
12
RTFLT
11
13
VREF
12
15
AGND
13
16
VCC
14
19
VBAT1
15
20
VBAT2
16
22
BGND
— 2, 3, 4, 5, 8, NC
11, 14, 17,
18, 21, 27,
28, 30, 32,
36, 37, 39,
42, 44, 46
17
23
RGDET
18
24
ICM
Type
Name/Function
O
O
I
I
I
O
I
—
—
—
O
GND
PWR
PWR
PWR
GND
—
Loop Closure Detector Output—Ring Trip Detector Output.
When low, this logic output indicates that an off-hook condition
exists or ringing is tripped.
Transmit ac Output Voltage. Output of internal AAC amplifier.
This output is a voltage that is directly proportional to the differen-
tial ac tip/ring current.
Receive ac Signal Input (Noninverting). This high-impedance
input controls the ac differential voltage on tip and ring. This node
is a floating input.
Receive ac Signal Input (Inverting). This high-impedance input
controls the ac differential voltage on tip and ring. This node is a
floating input.
Power Ring Signal Input. ac-couple to a sine wave or lower crest
factor low-voltage ring signal. The input here is amplified to pro-
vide the full power ring signal at tip and ring. This signal may be
applied continuously, even during nonringing states.
dc Output Voltage. This output is a voltage that is directly propor-
tional to the absolute value of the differential tip/ring current. This
is used to set ring trip threshold.
Current-Limit Program Input. Connect ground to this pin to set
current-limit to 25 mA, float to this pin to set current limit to 40 mA.
Filter Capacitor. Connect a capacitor from this node to ground.
Filter Capacitor. Connect a capacitor from this node to CF2.
Ring Trip Filter. Connect this lead to DCOUT via a resistor and to
AGND with a capacitor to filter the ring trip circuit to prevent spuri-
ous responses. A single-pole filter is needed.
SLIC Internal Reference Voltage. Output of internal 1.5 V refer-
ence voltage.
Analog Signal Ground.
Analog Power Supply. User choice of 5 V or 3.3 V nominal power
or supply.
Battery Supply 1. High-voltage battery.
Battery Supply 2. Lower-voltage battery.
Battery Ground. Ground return for the battery supplies.
No Connection.
O Ring Ground Detect. When high, this open collector output indi-
cates the presence of a ring ground or a tip ground. This supervi-
sion output may be used in ground key, ground start or common-
mode fault detection applications.
I Common-Mode Current Sense. To program tip or ring ground
sense threshold, connect a resistor to VCC and connect a capacitor
to AGND to filter 50/60 Hz. If unused, the pin is connected to
ground.
Agere Systems Inc.
9
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