L9500A Просмотр технического описания (PDF) - Agere -> LSI Corporation
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L9500A Datasheet PDF : 32 Pages
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L9500A
High-Voltage Ringing SLIC for VoIP Applications
Preliminary Data Sheet
September 2001
Pin Information (continued)
Table 1. Pin Descriptions
28-Pin
PLCC
1
48-Pin
MLCC
43
2
45
3
47
4
48
5
1
6
2
7
6
8
8
9
10
10
12
11
13
12
15
13
16
14
19
15
21
16
23
17 3, 4, 5, 7, 9, 11,
14, 17, 18, 20,
22, 27, 29, 30,
32, 36, 37, 40,
42, 44, 46
18
24
Symbol
NSTAT
VITR
RCVP
RCVN
RINGINN
RINGINP
DCOUT
CF2
CF1
RTFLT
VREF
AGND
VCC
VBAT1
VBAT2
BGND
NC
VPROG
Type
Name/Function
O
O
I
I
I
I
O
—
—
—
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 or a ring ground has occurred.
Transmit ac Output Voltage. Output of internal AAC amplifier.
This output is a voltage that is directly proportional to the differ-
ential ac tip/ring current.
Receive ac Signal Input (Noninverting). This high-impedance
input controls to ac differential voltage on tip and ring. This node
is a floating input.
Receive ac Signal Input (Inverting). This high-impedance
input controls to ac differential voltage on tip and ring. This node
is a floating input.
Power Ring Signal Input. 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.
Power Ring Signal Input. 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 pro-
portional to the absolute value of the differential tip/ring current.
This is used to set ring trip threshold.
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
spurious responses. A single-pole filter is needed.
SLIC Internal Reference Voltage. Output of internal 1.5 V ref-
erence 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.
I Current-Limit Program Input. Connect ground to this pin to set
current limit to 25 mA; leave this pin open to set current limit to
40 mA.
8
Agere Systems Inc.
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