L9214A/G
Low-Cost Ringing SLIC
Preliminary Data Sheet
October 2001
Pin Information (continued)
Table 1. Pin Descriptions
28-Pin 32-Pin
48-Pin
MLCC
Symbol
Type
Name/Function
SOG
PLCC
1
1
43
NSTAT
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.
—
—
—
5, 14, 18,
28, 32, 39,
42, 44
NC
NC
—
—
No Connection. May be used as a tie point.
2, 6, 7, 8 1—4, 8,
11, 17, 21,
27, 30, 37,
46
No Connection. May not be used as a tie point.
2
3
4
5
3
4
5
9
45
47
48
6
VITR
RCVP
RCVN
DCOUT
O
I
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.
I
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.
O
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.
6
10
7
IPROG
I
Current-Limit Program Input. A resistor is connected
from this pin to DCOUT to program the dc current limit for
the device.
7
8
9
11
12
13
9
CF2
CF1
—
—
—
Filter Capacitor. Connect a capacitor from this node to
ground.
10
12
Filter Capacitor. Connect a capacitor from this node to
CF2.
RTFLT
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.
10
14
13
IREF
I
SLIC Internal Reference Current. Connect a resistor
between this pin and AGND to generate an internal refer-
ence current.
11
12
15
16
15
16
AGND
VCC
GND Analog Signal Ground.
PWR Analog Power Supply. User choice of 5 V or 3.3 V nom-
inal power supply.
13
14
17
18
19
20
VBAT1
VBAT2
PWR Battery Supply 1. High-voltage battery.
PWR Battery Supply 2. Low-voltage battery or power control
resistor.
15
19
22
BGND
GND Battery Ground. Ground return for the battery supplies.
10
Agere Systems Inc.
AGERE [ AGERE SYSTEMS ]
