l3037 STMicroelectronics, l3037 Datasheet - Page 4

• Manufacturer Part Number: l3037
• Description: Subscriber Line Interface Circuit
• Manufacturer: STMicroelectronics

L3037
PIN DESCRIPTION
Unless otherwise specified all the diagrams in this datasheet refers to the PLCC44 Pin Connection.
4/22
27, 29,36
PQFP44
2,5 to 7,
10,26,
1, 28
No.
39
40
41
42
43
44
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
30
31
32
33
34
35
37
38
2
3
4
8
9
PLCC44
10 to 14
32 to 36
No.
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
37
38
39
40
41
42
43
44
1
2
3
4
5
6
7
8
9
–
SRING
BGND
VREG
ODET
CREV
TTXIN
AGND
BASE
GREL
RTTX
ACFD
RING
RGIN
RDC
STIP
OGK
CRT
GST
N.C.
REL
V
LIM
C
I
Pin
I
TIP
V
Z
CF
VB
D1
D0
R
Rx
REF
LTF
Z
Tx
CC
SS
AC
AC
S
B
Positive Power Supply (+5V)
Transversal Line Current Image ((I
DC feedback input (the RDC resistor is connected from this node to I
Battery voltage ripple rejection (C
Driver for external transistor base
Battery ground
Regulated Voltage. Provides negative power supply for the power amplifier.
(connected to emitter of the external transistor.)
Input of A power amplifier (when no compensation of ext. ptc resistor mismatch is
requested it must be shorted to the TIP lead).
A line termination output (I
Battery Supply
PLCC44: All pins are internally connected together.
PQFP44: It is mandatory to short pin 1 and pin 28 as closed as possible to the device.
B line termination output (I
Input of B power amplifier (when no compensation of ext. ptc resistor mismatch is
requested it must be shorted to the RING lead).
Ring trip and ground key capacitor
ON/OFF hook and RING TRIP output (when disable is internally pulled up)
Ring input signal. (when open is internally pulled to GND)
Ground key output (when disable is internally pulled up)
A open command (when open is internally pulled down)
Bit 1
Bit 0
Current Limitation Program. (when open is internally forced to 44mA current limitation)
Negative Power Supply (-5V)
Ring relay driver output
Reverse polarity transition time control. One proper capacitor connected between this
pin and AGND is setting the reverse polarity transition time. If reverse polarity feature
is not used must be open or connected to AGND through a filter capacitor.
Ground reference for ring relay driver
AC feedback input (ACDC split capacitor is connected from this node to ILTF)
Protection resistors image (the image resistor is connected from this node to ACFD)
Balance network for 2 to 4 wire conversion (the balance impedance Z
from this node to AGND. The Z
4 wire output port (Tx output)
4 wire receiving port. (Rx input)
Rx buffer output (the AC impedance is connected from this node to ACFD)
Metering input port/V
Metering cancellation network. If not used should be left open.
AC impedance synthesis
DC and AC signal ground
Voltage Reference Output
Not connected
drop
programming. If not used should be connected to AGND.
A
B
is the current sourced from this pin).
is the current sunk into this pin).
A
impedance is connected from this node to Z
SVR
A
+ I
Description
capacitor is connected from this node to BGND).
B
) / 200)
LTF
B
is connecetd
)
AC
)