Mitsumi LAG639 Monolithic ic Datasheet

IC for Multifunction Telephones LAG639
MITSUMI
IC for Multifunction Telephones
Monolithic IC LAG639
Outline
This IC was developed for use in home-use telephone and small-scale telephone systems, and incorporates
data transmission functions (AMI).
Features
1. Incorporates efficient switching regulator with broad input voltage range
VOUT
5V±0.25
IL
250mA (13~45V)
VIN
15~45V
2. Internal data transmission/reception circuits
Data can be superposed on the power supply line for transmission.
AMI format is used for transmission route coding.
3. Internal system reset circuit
5V line abnormal voltage detection circuit
Watchdog timer reset circuit
4. Internal speaker amp
260 mW typ. at 8Ω load
Mute pin
5. Internal beep sound generator circuit
With pin to vary audio volume (also used to turn beep sound on and off)
Package
SDIP-30A (LAG639D)
Absolute Maximum Ratings
(Ta=25°C)
Item
Symbol
Ratings
Units
Operating temperature
TOPR
-20~+70
°C
Storage tempereture
TSTG
-40~+125
°C
Power supply voltage
VCC max.
46
V
Allowable loss
Pd
750
mW
IC for Multifunction Telephones LAG639
MITSUMI
Electrical Characteristics
Item
(Except where noted otherwise, Ta=25°C, VCC=30V)
Symbol
Measurement
circuit
Measurement conditions
Min. Typ. Max. Units
SWR unit
VCC=15~45V
Output voltage
VO1
1
Output voltage
VO2
1
Output ripple voltage
Vr
1
Reactive current
ICCq
1
SWR transmission frequency
FOSC
1
Output current on short-circuit
IOS
1
RS=0.2Ω
70
110
150
mA
2
*
4.30
4.50
4.80
V
IL=0~250mA
VCC=13~45V
IL=0~200mA
4.75
5.00
5.25
V
4.70
5.00
5.25
V
50
mVP-P
10
mA
IL=250mA
IL=0mA
6
Amp & reception off
80
kHz
Power supply voltage detection unit
Detection voltage
VS
Detection drop voltage
VS
2
VS=Vo-VS
0.2
Output current while on
IRON
2
Vo=4V
10
Leakage output current while off
IROFF
2
Vo=5.25V
Note:
V
20
mA
1
µA
The asterisk ( ) indicates that the power supply voltage detection unit characteristics are standards in
the transient power on/off states. However, for convenience the detection voltage is taken to be the
value of V0 when V0 in measurement circuit 2 is varied and the pin 6 output state is switched from off
to on.
*
Electrical Characteristics
(Except where noted otherwise, Ta=25°C, VCC=30V Faudio=1kHz)
Item
Symbol
Measurement
circuit
Power amp unit
Amp gain
Maximum distortion-free output
Distortion
GV
PO max.
THD
1
1
1
Attenuation at 100 Hz
GF1/GF0
1
Attenuation at 10 Hz
Input IMP1
Input IMP2
GF2/GF0
RIN1
RIN2
1
3
3
Residual noise 1
Vno1
1
Residual noise 2
Vno2
1
Measurement conditions
Voa=0.775Vrms
THD=10%
PO=100mW
FO=1kHz, Fl=100Hz
Voa=0.775Vrms
F2=10 kHz, above conditions
Mute off
Mute on
Mute on
AUDIO IN 20mVrms
IL=10 70mA 1.5kHz
Transmission unit ON Ft=1kHz
Mute off
AUDIO OFF
IL=10 70mA 1.5kHz
Transmission unit ON Ft=1kHz
Min. Typ. Max. Units
35
150
38
260
41
2
10
2.5
dB
mV
%
-14
dB
-8
15
3.5
dB
kΩ
kΩ
0.5
mVrms
1.2
mVrms
IC for Multifunction Telephones LAG639
MITSUMI
Item
Symbol
Measurement
circuit
Beep sound generator unit
Beep sound frequency
Beep off switching point
Fb
Ibsw
1
1
Beep sound output 1
Vob1
1
Beep sound output 2
Watchdog timer unit
Vob2
1
Timer time
Tt
1
Output pulse width
TPW
1
Output voltage while on
Leakage output current while off
Transmission circuit unit
Transmission output voltage
Transmission waveform symmetry
Reception sensitivity
Noise resistance
Input IMP
VWON
IWOFF
1
1
Vto
Vtr
Vrs
Vrn
RIN3
1
1
1
1
3
Transmission delay time
Td1
1
Transmission delay time
Td2
1
Transmission delay time
Td3
1
Transmission delay time
Td4
1
Reception output H voltage
VroH
Reception output L voltage
VroL
Transmission waveform LOSS 1
Vtloss1
Transmission waveform LOSS 2
Vtloss2
General logic unit characteristics
H level input voltage
ViH
L level input voltage
ViL
H level input current
IiH
L level input current
IiL
1
1
1
1
3
3
3
3
Measurement conditions
Min. Typ. Max. Units
0.85
20
Pin 9 input current
Pin 9 connected to GND through 4.7k
1.0
Amp output voltage
Pin 9 connected to GND through 47k 0.11
cf. watchdog timer
waveform diagram
cf. watchdog timer
waveform diagram
T=beep sound period
0.8
1.0
35
1.15
48
kHz
µA
1.4
1.8
Vrms
0.16
0.22 Vrms
1.0
1.2
S
1.1
(1T)
mS
0.5
1
V
µA
4.2
1
1.2
4.6
1.25
1.5
VP-P
36
46
0.45
(1/2T)
Both pins 27 and 28
Vt1/Vt2
3.8
0.75
1.0
Level at which no errors are output 0.8
Both pins 7and 8
25
cf. transmit/receive
waveform diagrams
cf. transmit/receive
waveform diagrams
cf. transmit/receive
waveform diagrams
cf. transmit/receive
waveform diagrams
4
0.5
µS
0.4
µS
1.2
µS
1.5
µS
0.5
Vt=5V applied, power on
Vt=5V applied, power off
4.5
4.5
2.4
VIN=2.4V
VIN=0.4V
VP-P
VP-P
kΩ
0.8
10
-300
V
V
VP-P
VP-P
V
V
µA
µA
IC for Multifunction Telephones LAG639
MITSUMI
Watchdog timer waveform
TIMER CLEAR
(23PIN)
(22PIN)
Interrupt output
(20PIN)
Tt
Tpw
Transmission/Reception waveform
RESET (25PIN)
Transmission
DATA IN (24PIN)
Transmission
waveform (28PIN)
Transmission
waveform (26PIN)
Reception DATA OUT
(6PIN)
(24PIN)
(27PIN)
(26PIN)
Td1
Td2
Td3
Td4
Td1
Td2
Td3
Td4
(6PIN)
Measuring Circuit
Measuring Cuicuit 1
MITSUMI
Measuring Cuicuit 2
Measuring Cuicuit 3
IC for Multifunction Telephones LAG639
IC for Multifunction Telephones LAG639
MITSUMI
Switch Operation
(Measurement circuit 1)
Measurement item
SW1
SW2
SW5
SW6
Vo1, Vo2
-
1
Vr
-
1
No spike noise
ICCq
-
1
A1 only
IOS
-
1
A2 only
-
1
Vno1
-
1
Using 400Hz-15kHz BPF
Vno2
-
1
Using 400Hz-15kHz BPF
Fb, IbSW, Vob1, Vob2
-
1
-
1
GV, PO max., THD
GF1/GF0, GF2/GF0
-
-
SW3
SW4
Other conditions
THD measured after passing
Tt, TPW, Vwon
through 400Hz-15kHz BPF
cf. watchdog timer
waveform diagram
-
1
Vto, Vtr
*
1
SW5-1, 2 measured
Vrs, Vrn
-
1
Measured with Rt adjusted
Td, VroH, VroL
-
1
Vtloss 1
*
*
2
With power on, SW5-1, 2 measured
2
With power on, SW5-1, 2 measured
IWOFF
Vtloss 2
-
-
cf. transmit/receive
waveform diagrams
Note: Circles and X's mean the switch display should be on and off respectively; dashes (-) mean either
state is allowed.
MITSUMI
IC for Multifunction Telephones LAG639
Block Diagram and Application Circuits
1. The watchdog timer time is determined by the values of Rw and Cw.
Tt .=. Rw•Cw where Rw is 56kΩ to 560kΩ
Cw is between 0.01µF and 10µF
2. The beep sound frequency is determined by Rb and Cb.
. . 1/Rb•Cb where Rb is 56 kΩ to 330kΩ
Fb =
Cb is between 4700PF and 22,000PF.
3. The beep sound volume can be varied through the resistance connected to pin 10. At 4.7kΩ the
voltage is approx. 4VP-P, and at 47kΩ it is about 0.4VP-P.
4. In overload protection operation the voltage across pins 1 to 30 is tested, with a limit of 100 ±20mV.
On load shorting, the test voltage is dropped to about 1/4 to conserve power.
MITSUMI
IC for Multifunction Telephones LAG639
Additional application example 1
(SWR circuit not used)
Even when a 5V external voltage can be supplied, an addition voltage of 13 to 45V must be applied to
pins 3 and 4 in order to obtain an internal biased power supply of 7.4V.
Additional application example 2
(Speaker amp not used)
In order to prevent abnormal oscillation of the amplification circuit, a 5V power supply must be
connected to pin 15 to halt amplification functions.
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