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MC33219A Datasheet

VOICE SWITCHED SPEAKERPHONE CIRCUIT

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MC33219A
Voice Switched Speakerphone
The Motorola MC33219A Voice Switched Speakerphone Circuit
incorporates the necessary amplifiers, attenuators, level detectors, and
control algorithm to form the heart of a high quality hands–free
speakerphone system. Included are a microphone amplifier with mute,
transmit and receive attenuators, a background monitoring system for both
the transmit and receive paths, and level detectors for each path. An AGC
system reduces the receive gain on long lines where loop current and power
are in short supply. A dial tone detector prevents fading of dial tone. A Chip
Disable pin permits conserving power when the circuit is not in use. The
volume control can be implemented with a potentiometer.
The MC33219A can be operated from a power supply, or from the
telephone line, requiring typically 3.2 mA. It can be used in conjunction with a
variety of speech networks. Applications include not only speakerphones,
but intercoms and other voice switched devices.
The MC33219A is available in a 24 pin narrow body DIP, and a wide body
SOIC package.
Supply Voltage Range: 2.7 to 6.5 V
Attenuator Range: 53 dB
Background Noise Monitor for Each Path
2 Point Signal Sensing
Volume Control Range: Typically 40 dB
Microphone and Receive Amplifiers Pinned Out for Flexibility
Microphone Amplifier can be Muted
Mute and Chip Disable are Logic Level Inputs
Chip Deselect Pin Powers Down the Entire IC
Ambient Operating Temperature: –40 to + 85°C
24 Pin Narrow Body (300 mil) DIP and 24 Pin SOIC
Microphone
Mute
VB
Simplified Block Diagram
Transmit
Out
Tx Attenuator
VB
BNM Attenuator Control
Vol
Cont
CD
VCC
VB
Reg.
DTD
Rx Attenuator
MC33219A
BNM
VB
VB
Speaker
Speaker Amplifier
This device contains 384 active transistors.
Receive
In
VOICE SWITCHED
SPEAKERPHONE CIRCUIT
SEMICONDUCTOR
TECHNICAL DATA
24
1
P SUFFIX
PLASTIC PACKAGE
CASE 724
24
1
DW SUFFIX
PLASTIC PACKAGE
CASE 751E
PIN CONNECTIONS
CP2 1
XDI 2
CPT 3
TLI 4
TLO 5
VB 6
CT 7
CD 8
NC 9
CPR 10
RLI 11
RLO 12
24 VCC
23 TAO
22 TAI
21 MCO
20 MCI
19 VLC
18 MUTE
17 RXI
16 RXO
15 RAI
14 RAO
13 GND
(Top View)
ORDERING INFORMATION
Device
Operating
Temperature Range Package
MC33219ADW
SOIC
MC33219AP TA = – 40° to +85°C Plastic DIP
MOTOROLA ANALOG IC DEVICE DATA
© Motorola, Inc. 1995
1


Motorola Electronic Components Datasheet

MC33219A Datasheet

VOICE SWITCHED SPEAKERPHONE CIRCUIT

No Preview Available !

MC33219A
MAXIMUM RATINGS
Rating
Symbol Min
Max
Supply Voltage
VCC – 0.5
7.0
Any Input
Vin – 0.4 VCC + 0.4
Maximum Junction Temperature
TJ – +150
Storage Temperature Range
Tstg – 65
+150
NOTE: Devices should not be operated at or outside these values. The “Recommended Operating
Conditions” provide for actual device operation.
Unit
Vdc
Vdc
°C
°C
RECOMMENDED OPERATING CONDITIONS
Characteristic
Supply Voltage (Non–AGC Range)
(AGC Range)
Maximum Attenuator Input Signal
Volume Control Input (Pin 19)
Logic Input Voltage (Pins 8, 18)
Low
High
Operating Temperature Range
VB Output Current (VCC = 5.0 V)
Symbol
VCC
Vin(max)
VINVLC
VINL
TA
IVB
Min
3.5
2.7
VB – 1.1
Typ
0–
2.0 –
– 40 –
– See
Figure 12
Max
6.5
3.5
300
VB
0.8
VCC
85
Unit
Vdc
mVrms
Vdc
Vdc
°C
mA
ELECTRICAL CHARACTERISTICS (TA = 25°C, VCC = 5.0 V, CD 0.8 V, unless noted. See Figure 2.)
Characteristic
Symbol Min Typ
POWER SUPPLY
Supply Current (Enabled, CD 0.8, VB Open)
Idle Mode
Tx Mode
Rx Mode
ICCE
2.0 3.2
– 4.2
– 4.0
Supply Current (Disabled, CD = 2.0 V, VB Open)
VCC = 3.0 V
VCC = 5.0 V
VCC = 6.5 V
ICCD
– 65
50 110
– 145
VB Output Voltage (IVB = 0, CD = 0)
VCC = 2.7 V
VCC = 5.0 V
VCC = 6.5 V
VB
– 0.9
2.1 2.2
– 3.0
VB Output Resistance (IVB –1.0 mA)
PSRR @ VB versus VCC, f = 1.0 kHz, CVB = 100 µF
ROVB
PSRR
– 600
– 57
ATTENUATOR CONTROL
CT Voltage (with Respect to VB)
Rx Mode (VLC = VB)
Idle Mode
Tx Mode
VCT – VB
150
0
– 100
CT Source Current (Switching to Rx Mode)
CT Sink Current (Switching to Tx Mode)
ICTR
ICTT
–110
35
–90
50
CT Idle Current
ICTI
– 3.0
0
Dial Tone Detector Threshold (with Respect to VB at RAI)
VLC Input Current @
VLC = VB
VLC = VB – 1.0 V
VDT
IVLC
– 40 – 20
–0
–8.0 –6.0
VLC Input Resistance
RVLC
– 167
Max
5.0
170
2.3
–70
65
3.0
– 8.0
–3.0
Unit
mA
µA
Vdc
dB
mV
µA
µA
µA
mV
µA
k
2 MOTOROLA ANALOG IC DEVICE DATA


Part Number MC33219A
Description VOICE SWITCHED SPEAKERPHONE CIRCUIT
Maker Motorola
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