MC33215
FEATURES
Line Driver and Supply
• Separate Input for DTMF and Auxiliary Signals
• Parallel Operation Down to 4.0 mA of Line Current
• AC and DC Termination of Telephone Line
• Adjustable Set Impedance for Real and Complex
Termination
• Efficient Supply Point for Loudspeaker Amplifier and
Peripherals
• Two Stabilized Supply Points for Handset and Base
Microphones
• Separate Supply Arrangement for Handset and
Speakerphone Operation
Speakerphone Operation
• Handsfree Operation via Loudspeaker and Base
Microphone
• Integrated Microphone and Loudspeaker Amplifiers
• Differential Microphone Inputs
• Loudspeaker Amplifier can be Powered and Used
Separately from the Rest of the Circuit
• Integrated Switches for Smooth Switch–Over from
Handset to Speakerphone Operation
• Signal and Background Noise Monitoring in Both
Channels
Handset Operation
• Transmit and Receive Amplifiers
• Differential Microphone Inputs
• Sidetone Cancellation Network
• Line Length AGC
• Adjustable Switching Depth for Handsfree Operation
•
Switch–Over
• Dial Tone Detector in the Receive Channel
• Microphone and Earpiece Mute
Figure 1. Pin Connections
1
2
V
42
41
40
39
38
37
36
PGD
LSO
VLS
LSB
CC
VLN
3
VHF
VMC
SLB
52
51
50
49
48
47
46
45
44
43
42
41
40
4
5
1
2
3
4
5
6
7
8
9
SLB
REG
SLP
MFI
LSF
LSF
BVO
PPL
39
38
REG
6
BVO
7
SLP
MFI
PPL 37
LSI 36
8
LSI 35
9
HM1
HM2
34
33
32
31
30
29
28
27
26
25
24
23
22
VOL
HM1
HM2
VOL 35
SWD 34
10
11
12
13
14
15
16
17
18
19
20
21
SWD
REF
AGC
Gnd
RLS
RSA
BM2
BM1
REF
AGC
33
32
BM2
BM1
SDIP–42
TQFP–52
V
DD
V
Gnd 31
RLS 30
RSA 29
RSE 28
DD
TSA
TSE
TBN
10 TSA
11 TSE
12 TBN
13 MUT
RSE
RBN
RXI
MUT
SPS
PRS
RBN
27
GRX
14
15
16
17
18
19
20
21
22
23
24
25
26
SWT
LSM
RXO
RXS
(Top View)
(Top View)
2
MOTOROLA ANALOG IC DEVICE DATA
MOTOROLA [ MOTOROLA ]
