INTEGRATED CIRCUITS
DATA SHEET
UBA1702; UBA1702A
Line interrupter driver and ringer
Product specification
Supersedes data of 1996 Jan 09
File under Integrated Circuits, IC03
1997 Sep 29
Philips Semiconductors
Product specification
Line interrupter driver and ringer
FEATURES
Speech part
•
Driver for the line interrupter that can be either a PMOST
when UBA1702 is used or a PNP when UBA1702A is
used
•
Adjustable over-current protection
•
Adjustable over-voltage protection for transmission
circuit
•
Adjustable mute (dialling mode voltage; DMO or NSA)
•
Adjustable current loop detection (hook switch status)
•
Microcontroller supply
•
Provision for electronic hook switch.
Ringer part
•
Over-voltage protection
•
Ringer frequency output for frequency discrimination
•
Adjustable ringer threshold for piezo-driver enable
•
Three bits ringer volume control
•
Bridge-tied-load (BTL) output stage for piezo transducer
•
Fast start-up microcontroller supply.
APPLICATIONS
Miscellaneous
UBA1702; UBA1702A
•
Separated ground pins for transmission circuit interface
and control signals (e.g. for TEA1064A)
•
Possibility to supply the microcontroller with an external
voltage source.
•
Telephone sets with software controlled ringer function
•
Telephone sets with electronic hook switch.
GENERAL DESCRIPTION
The UBA1702; UBA1702A performs the high voltage
interface and ringer functions of the corded analog
telephone set in close cooperation with a microcontroller
and transmission circuit.
The UBA1702; UBA1702A incorporates several
protections, a driver for the line interrupter and a ringer.
Because of the practical division of functions between the
microcontroller, the transmission circuit and the UBA1702;
UBA1702A, it is possible to have a higher integration level
thereby reducing significantly the number of discrete
components in a telephone set.
ORDERING INFORMATION
PACKAGE
TYPE NUMBER
NAME
UBA1702
UBA1702A
UBA1702T
UBA1702AT
DIP28
DIP28
SO28
SO28
DESCRIPTION
plastic dual in-line package; 28 leads (600 mil)
plastic dual in-line package; 28 leads (600 mil)
plastic small outline package; 28 leads; body width 7.5 mm
plastic small outline package; 28 leads; body width 7.5 mm
VERSION
SOT117-1
SOT117-1
SOT136-1
SOT136-1
1997 Sep 29
2
Philips Semiconductors
Product specification
Line interrupter driver and ringer
UBA1702; UBA1702A
QUICK REFERENCE DATA
Speech part: l
line
= 20 mA; DPI = LOW; T
amb
= 25
°C;
V
EE
= 0 V; unless otherwise specified.
Ringer part: V
line(rms)
= 45 V; f = 25 Hz; using an RC combination of 2.2 kΩ and 820 nF and a diode bridge between the
line and the RPI input.
SYMBOL
Speech part
S
WITCH DRIVER AND REFERENCES
(
PINS
SDI, SDO, EHI
AND
DPI); UBA1702A
ONLY
R
SDO
R
SDI-SDO
R
SDI
V
SPO(M)
V
SPO(Z)
resistance between pins SDO and V
EE
resistance between pins SDI and SDO V
SDI
−
V
SDO
< 12 V
resistance between pins SDI and V
EE
adjustable mute voltage referenced to
V
EE
V
SDI
= 240 V; DPI = HIGH
MSI = HIGH;
MSA open-circuit
−
−
5
−
11
2.2
−
−
−
3
13
kΩ
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
S
WITCH DRIVER AND REFERENCES
(
PINS
SDI, SDO, EHI
AND
DPI); UBA1702
AND
UBA1702A
1.1
−
2.7
12
MΩ
MΩ
M
UTE SWITCH AND ADJUSTABLE PROTECTION ZENER VOLTAGE
(
PINS
MSI, MSA
AND
ZPA)
V
V
adjustable zener voltage referenced to MSI = LOW;
V
EE
ZPA open-circuit
current limitation (pin SPI)
current detection (pin SPI)
CLA shorted to V
EE
CDA open-circuit
V
BB
> 3.7 V; I
DD
=
−1
mA
C
URRENT MANAGEMENT
(
PINS
SPI, SPO, CDA, CLA
AND
CDO)
l
SPI(lim)
I
SPI(det)
V
DD
−
2
120
3
−
4
mA
mA
M
ICROCONTROLLER SUPPLY
(V
DD
AND
V
BB
)
supply output voltage referenced to
V
SS
3.0
3.3
3.6
V
Ringer part
P
ROTECTION
(
PIN
RPI)
I
RPI(max)
V
RR(th)
maximum input current
70
−
−
11
−
−
mA
R
INGER THRESHOLD AND FREQUENCY DETECTION
(
PINS
V
RR
, RTA
AND
RFO)
ringer supply threshold voltage
referenced to V
SS
step resolution
last step resolution
RTA open-circuit
V
V
OLUME CONTROL
(
PINS
RV0, RV1
AND
RV2)
∆G
s
∆G
ls
(RV2, RV1, RV0) from
(0, 0, 0) to (1, 1, 0); note 1
(RV2, RV1, RV0) from
(1, 1, 0) to (1, 1, 1); note 2
−
−
6
9.5
−
12
dB
dB
R
INGER MELODY INPUT AND PIEZO DRIVER
(
PINS
RMI, ROA
AND
ROB)
V
o(max p−p)
maximum output voltage between pins RV2 = 1; RV1 = 1; RV0 = 1
−
ROA and ROB (peak-to-peak value)
Notes
1. Independent of V
RR
if greater than 10 V.
2. Without piezo transducer, dependent on V
RR
.
28.7
32
V
1997 Sep 29
3
Philips Semiconductors
Product specification
Line interrupter driver and ringer
BLOCK DIAGRAM
UBA1702; UBA1702A
handbook, full pagewidth
SDI
1
SDO
CLA
2
25
CDO
CDA
24
26
SPI
SPO
5
6
SPEECH
ZENER PROTECTION
14 V
VSS VDD
SENSE
9
ZPA
DPI
4
Sref
S ref
10
MSA
EHI
28
Sref
R ref
VSS
SWITCH
DRIVER
LINE CURRENT MANAGEMENT
MUTE SWITCH
VSS
VDD
8
MSI
V BB
VDD
19
18
SUPPLY
SPO
Vref
Sref
17
UBA1702; UBA1702A
UBA1702T; UBA1702AT
V SS
V EE
7
REFERENCES
V SS
VRR
VRR
V SS
Rref
22
ROA
RINGER FREQUENCY
DETECTION
VDD
RFO
12
V SS
VDD
RINGER
V SS
V SS
VDD
20
ROB
1/2 VDD
VDD
RINGER MELODY INPUT AND PIEZO DRIVER
RPI
23
V RR
VDD
V SS
13
RV0
R ref
DIGITAL
-TO-
ANALOG
CONVERTER
VDD
VOLUME
CONTROL
VDD
V SS
VDD
V SS
14
RV1
R ref
RINGER
PROTECTION
VSS
RINGER
THRESHOLD
15
RV2
21
11
16
MBE184
RTA
VRR
RMI
Fig.1 Block diagram.
1997 Sep 29
4
Philips Semiconductors
Product specification
Line interrupter driver and ringer
PINNING
SYMBOL
SDI
SDO
n.c.
DPI
SPI
SPO
V
EE
MSI
ZPA
MSA
RTA
RFO
RV0
RV1
RV2
RMI
V
SS
V
DD
V
BB
ROB
V
RR
ROA
RPI
CDO
CLA
CDA
n.c.
EHI
PIN
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
DESCRIPTION
switch driver input
switch driver output
not connected
dialling pulse input
speech part input
speech part output
handbook, halfpage
UBA1702; UBA1702A
ground for transmission circuit
mute switch input
Zener protection adjustment input
mute switch adjustment input
ringer threshold adjustment input
ringer frequency output
ringer volume input; bit 0
ringer volume input; bit 1
ringer volume input; bit 2
ringer melody input
ground for microcontroller and
ringer
microcontroller supply voltage
supply voltage from transmission
circuit
ringer output B
ringer supply voltage
ringer output A
ringer part input
current detection output
current limitation adjustment input
current detection adjustment input
not connected
electronic hook switch input
SDI
SDO
n.c.
DPI
SPI
SPO
VEE
MSI
ZPA
MSA
RTA
RFO
RV0
RV1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
MBE183
28 EHI
27 n.c.
26 CDA
25 CLA
24 CDO
23 RPI
UBA1702
UBA1702T
UBA1702A
UBA1702AT
22 ROA
21 V RR
20 ROB
19 V BB
18 V DD
17 V SS
16 RMI
15 RV2
Fig.2 Pin configuration.
1997 Sep 29
5
