Freescale Semiconductor, Inc.
Order this document by MC33215/D
MC33215
Advance Information
Telephone Line Interface and
Speakerphone Circuit
Freescale Semiconductor, Inc...
The MC33215 is developed for use in fully electronic telephone sets with
speakerphone functions. The circuit performs the ac and dc line termination,
2–4 wire conversion, line length AGC and DTMF transmission. The
speakerphone part includes a half duplex controller with signal and noise
monitoring, base microphone and loudspeaker amplifiers and an efficient
supply. The circuit is designed to operate at low line currents down to 4.0 mA
enabling parallel operation with a classical telephone set.
52 1
FB SUFFIX
PLASTIC PACKAGE
CASE 848B
(TQFP–52)
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Highly Integrated Cost Effective Solution
Straightforward AC and DC Parameter Adjustments
Efficient Supply for Loudspeaker Amplifier and Peripherals
Stabilized Supply Point for Handset Microphone
Stabilized Supply Point for Base Microphone
Loudspeaker Amplifier can be Powered and Used Separately
Smooth Switch–Over from Handset to Speakerphone Operation
Adjustable Switching Depth for Handsfree Operation
ORDERING INFORMATION
Device
MC33215FB
MC33215B
T
A
= –20° to +70°C
Operating
Temperature Range
Package
TQFP–52
SDIP–42
42
1
B SUFFIX
PLASTIC PACKAGE
CASE 858
(SDIP–42)
Simplified Application
AC
Impedance
DC Offset
Line Current
Telephone
Line
DTMF
Handset
Microphone
Base
Microphone
MF
HM
Attenuator
Duplex
Controller
R
x
Line
Driver
Current
Splitter
1:10
V
CC
Supply
BM
DC Slope
Receive Signal
V
CC
or
External Supply
Base Loudspeaker
LS
Attenuator
Handset Earpiece
Auxiliary Input
This device contains 2782 active transistors.
This document contains information on a new product. Specifications and information herein
are subject to change without notice.
©
Motorola, Inc. 1997
Rev 0
MOTOROLA ANALOG IC DEVICE
For More Information On This Product,
DATA
1
Go to: www.freescale.com
FREESCALE [ FREESCALE SEMICONDUCTOR, INC ]
