L9214A Просмотр технического описания (PDF) - Agere -> LSI Corporation
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L9214A Datasheet PDF : 46 Pages
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L9214A/G
Low-Cost Ringing SLIC
Preliminary Data Sheet
October 2001
Pin Information (continued)
Table 1. Pin Descriptions
28-Pin
SOG
1
32-Pin
PLCC
1
48-Pin
MLCC
43
Symbol
NSTAT
—
— 5, 14, 18,
NC
28, 32, 39,
42, 44
— 2, 6, 7, 8 1—4, 8,
NC
11, 17, 21,
27, 30, 37,
46
2
3
45
VITR
3
4
47
RCVP
4
5
48
RCVN
5
9
6
DCOUT
6
10
7
IPROG
7
11
8
12
9
13
9
CF2
10
CF1
12
RTFLT
10
14
11
15
12
16
13
17
14
18
15
19
13
IREF
15
AGND
16
VCC
19
VBAT1
20
VBAT2
22
BGND
Type
Name/Function
O Loop Closure Detector Output—Ring Trip Detector
Output. When low, this logic output indicates that an off-
hook condition exists or ringing is tripped.
— No Connection. May be used as a tie point.
— No Connection. May not be used as a tie point.
O
I
I
O
I
—
—
—
I
GND
PWR
PWR
PWR
GND
Transmit ac Output Voltage. Output of internal AAC
amplifier. This output is a voltage that is directly propor-
tional to the differential 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-imped-
ance input controls to ac differential voltage on tip and
ring. This node is a floating input.
dc Output Voltage. This output is a voltage that is
directly proportional to the absolute value of the differen-
tial tip/ring current. This is used to set the dc current limit
and the ring trip threshold.
Current-Limit Program Input. A resistor is connected
from this pin to DCOUT to program the dc current limit for
the device.
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 resis-
tor and to AGND with a capacitor or a resistor capacitor
combination, depending on the ringing type, to filter the
ring trip circuit to prevent spurious responses.
SLIC Internal Reference Current. Connect a resistor
between this pin and AGND to generate an internal refer-
ence current.
Analog Signal Ground.
Analog Power Supply. User choice of 5 V or 3.3 V nom-
inal power supply.
Battery Supply 1. High-voltage battery.
Battery Supply 2. Low-voltage battery or power control
resistor.
Battery Ground. Ground return for the battery supplies.
10
Agere Systems Inc.
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