DATA SHEET
BIPOLAR ANALOG INTEGRATED CIRCUIT
µ
PC7073
µ
PC7073 ANALOG SUBSCRIBER LINE LSI (BS-SLIC)
The
µ
PC7073 is a BS-SLIC that can be used in analog subscriber circuits such as private branch exchangers
(PBXs) and switching equipment for central offices. It features two of the functions required for analog subscriber
circuits: subscriber line feed control and subscriber line supervision.
Use of the
µ
PC7073 in combination with a digital CODEC (
µ
PD9903) can reduce the number of components
required in analog subscriber circuits.
FEATURES
• Single-chip, monolithic LSI (bipolar)
• Constant-resistance feed or semi constant-current feed
Note
• 200-Ω feed, 400-Ω feed, or Tip-to-Ring pin feedout status (HIGH and WET)
• On-chip metering signal superposing circuit
• On-hook sending and receiving
• Loop detection
Note
• Ground detection and ground-fault/power contact protection
Note
• Three on-chip relay drivers (flyback prevention diode must be externally provided)
• Two power supply voltages (–48 V and +5 V)
• Low power consumption: 110 mW (TYP., when on hook)
Note
Requires
µ
PD9903.
ORDERING INFORMATION
Part Number
Package
48-pin plastic shrink SOP (375 mil)
µ
PC7073GT
The information in this document is subject to change without notice.
Document No. S10896EJ2V0DS00 (2nd edition)
(Previous No. ID-3576)
Date Published June 1996 P
Printed in Japan
©
1996
µ
PC7073
PIN CONFIGURATION
48-pin plastic shrink SOP (375 mil)
DC
OUT3
DC
OUT2
DC
OUT1
DC
IN1
DC
IN2
BB
OUT
ASCN
AGDT
BIAS
R
X
ACOM
NC
NC
NC
GND1
NC
PD
ALM
BCUT
RC
1
RC
2
RC
3
V
BB
T
EF
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
V
CC
TTX
IN
C
PSR
R
B
R
E
NC
R
S
NC
T
S
NC
T
E
T
B
C
DC
T
X
OP
IN–
OP
IN+
R
EF
GND2
NC
RY
3
NC
RY
2
NC
RY
1
µ
PD7073GT
ACOM
AGDT
ALM
ASCN
BB
OUT
BCUT
BIAS
CDC
CPSR
DC
IN1
, DC
IN2
:
:
:
:
:
:
:
:
:
:
ANALOG COMMON VOLTAGE
ANALOG GROUND DETECTION SIGNAL OUT
ALARM IN
ANALOG LOOP DETECTION SIGNAL OUT
V
BB
VOLTAGE INFORMATION OUT
BATTERY FEED CUT SIGNAL IN
BIAS LEVEL
DC FEEDBACK CAPACITOR
POWER SUPPLY REJECTION CAPACITOR
DC FEEDBACK CONTROL IN
DC FEEDBACK CONTROL OUT
GROUND
NO CONNECTION
TELETAX SIGNAL CANCEL IN (+)
TELETAX SINGAL CANCEL IN (–)
POWER DOWN CONTROL IN
R
B
R
E
R
EF
RS
R
X
T
B
T
E
T
EF
T
S
TTX
IN
T
X
V
BB
V
CC
:
:
:
:
:
:
:
:
:
:
:
:
:
RING BASE
RELAY CONTROL IN
RING EMITTER
RING EMITTER PROTECT FEED
RING SENSE
SIGNAL RECEPTION IN
RELAY DRIVER OUT
TIP BASE
TIP EMITTER
TIP EMITTER PROJECT FEED
TIP SENSE
TELETAX SIGNAL IN
TRANSSMISSION OUTPUT
NEGATIVE POWER SUPPLY (–48 V)
POSITIVE POWER SUPPLY (+5 V)
RC
1
-RC
3
:
RY
1
-RY
3
:
DC
OUT1
-DC
OUT3
:
GND1, GND2 :
NC
OP
IN+
OP
IN–
PD
:
:
:
:
2
µ
PC7073
BLOCK DIAGRAM
GND1
V
CC
GND2
RY
1
RY
2
RY
3
RC
1
T
EF
Relay
drivers
RC
2
RC
3
DC
OUT2
T
B
T
E
Σ
AGDT
ASCN
DC
OUT3
DC
OUT1
T
X
T
S
R
S
DC
IN1
+
+
L.P.F
+
R
E
Bias circuit
R
B
BB
OUT
V
BB
R
EF
Logic circuits
V
BB
C
PSR
DC
IN2
CDC
R
X
BIAS
ACOM
Tip
Ring
V
BB
BCUT
ALM
PD
OP
IN–
OP
IN+
TTX
IN
3
µ
PC7073
CONTENTS
1. PIN FUNCTIONS .............................................................................................................................
2. USE CAUTIONS ..............................................................................................................................
3. ELECTRICAL SPECIFICATIONS ...................................................................................................
3.1
3.2
Discrete unit ratings ...............................................................................................................................
Combined specifications with
µ
PD9903 ..............................................................................................
5
7
8
8
10
4. SYSTEM APPLICATION EXAMPLE USING
µ
PC7073 AND
µ
PD9903 .................................... 14
5. PACKAGE DRAWING ..................................................................................................................... 15
6. RECOMMENDED SOLDERING CONDITIONS ............................................................................
16
4
µ
PC7073
1.
PIN FUNCTIONS
Number
1-3
4, 5
6
7
8
9
10
11
12-14, 16,
26, 28, 30,
39, 41, 43
15
17
Pin Name
DC
OUT1
-DC
OUT3
DC
IN1
, DC
IN2
BB
OUT
ASCN
AGDT
BIAS
R
X
ACOM
NC
I/O
O
I
O
O
O
I
I
I
–
DC feedback control output
DC feedback control input
V
BB
voltage information output
Tip-Ring difference current detection signal output
Tip-Ring sum current detection signal output
Bias level input. Connect to
µ
PD9903’s A
IN
pin
Receiving input for 4W side
Function
[to the
µ
PD9903’s pin 48-46]
[to the
µ
PD9903’s pin 45, 44]
[to the
µ
PD9903’s pin 43]
[to the
µ
PD9903’s pin 42]
[to the
µ
PD9903’s pin 41]
[to the
µ
PD9903’s pin 40]
[to the
µ
PD9903’s pin 39]
Signal reference voltage (2.4 V TYP) input for 4W side [to the
µ
PD9903’s pin 37, 38]
No-connection pins. Leave these pins unconnected.
GND1
PD
–
I
Ground pin 1, for circuit grounding
Power-down control
H: Power-up
TTL level
L: Power-down
[to the
µ
PD9903’s pin 32]
18
ALM
I
Ground-fault/power line contact protection mode select input
H: Protect mode
TTL level
L: Normal feed
[to the
µ
PD9903’s pin 31]
Feed-out select input
H: Feed-out
L: Normal feed
19
BCUT
I
TTL level
[to the
µ
PD9903’s pin 30]
[to the
µ
PD9903’s pin 29]
[to the
µ
PD9903’s pin 28]
[to the
µ
PD9903’s pin 27]
20
21
22
23
24
RC
1
RC
2
RC
3
V
BB
T
EF
I
I
I
–
O
Relay control for ringer transmission, high active
Relay control for line test, high active
Relay control for network test, high active
Negative power supply (–48 V)
Feed resistor pin connection for Tip side during ground-fault/power line contact
detection
Relay control for ringer transmission, open collector
Relay control for line testing, open collector
Relay control for network testing, open collector
Ground pin 2, relay driver
Ring feed resistor pin connection for ground-fault/power line contact detection
TTX (Teletax) signal cancel circuit input pin (+)
TTX signal cancel circuit input pin (–)
Transmission output for 4W side. Connect with BIAS pin via C
AC
capacitor.
Connect to DC feedback capacitor
Connect C
DC
capacitor to this pin
25
27
29
31
32
33
34
35
36
RY
1
RY
2
RY
3
GND2
R
EF
OP
IN+
OP
IN–
T
X
C
DC
O
O
O
–
O
I
I
O
–
37
38
40
42
T
B
T
E
T
S
R
S
O
O
I/O
I/O
Tip-side auxiliary power transistor base connection pin
Tip-side feed amplifier output pin. Connect with T
S
pin via R
FT
resistor.
Tip pin for 2W side
Ring pin for 2W side
5
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