MT8880CS

Manufacturer Part NumberMT8880CS
ManufacturerZarlink Semiconductor
MT8880CS datasheet
 


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Features
Complete DTMF transmitter/receiver
Central office quality
Low power consumption
Microprocessor port
Adjustable guard time
Automatic tone burst mode
Call progress mode
Applications
Credit card systems
Paging systems
Repeater systems/mobile radio
Interconnect dialers
Personal computers
Description
The MT8880C is a monolithic DTMF transceiver with
call
progress
filter.
It
is
D/A
TONE
Converters
Tone Burst
Control
Gating Cct.
Logic
IN+
+
Dial
Tone
-
High Group
IN-
Filter
Filter
GS
Low Group
OSC1
Filter
Oscillator
Circuit
OSC2
Control
Bias
Circuit
V
V
V
DD
Ref
SS
ISO
DS5431
MT8880CE
MT8880CS
MT8880CN
MT8880CP
Zarlink Semiconductor ISO
which provides low power dissipation and high
reliability. The DTMF receiver is based upon the
industry
receiver; the transmitter utilizes a switched capacitor
D/A converter for low distortion, high accuracy DTMF
signalling. Internal counters provide a burst mode
such that tone bursts can be transmitted with precise
timing. A call progress filter can be selected allowing
a microprocessor to analyze call progress tones. A
standard microprocessor bus is provided and is
directly
microprocessors.
fabricated
in
Row and
Transmit Data
Column
Register
Counters
Status
Register
Control
Register
A
Digital
Algorithm
and Code
Control
Converter
Register
Receive Data
Steering
Logic
Register
Logic
ESt
St/GT
Figure 1 - Functional Block Diagram
MT8880C
2
-CMOS
Integrated DTMF Transceiver
ISSUE 7
March 2001
Ordering Information
20 Pin Plastic DIP
20 Pin SOIC
24 Pin SSOP
28 Pin Plastic LCC
-40 ° C to +85 ° C
2
CMOS
technology,
standard
MT8870
monolithic
compatible
with
6800
Data
Bus
Buffer
Interrupt
Logic
I/O
Control
B
DTMF
series
D0
D1
D2
D3
IRQ/CP
Φ2
CS
R/W
RS0
1

MT8880CS Summary of contents