MT8888CP Zarlink Semiconductor, Inc., MT8888CP Datasheet
MT8888CP
Manufacturer Part Number
MT8888CP
Description
DTMF Transmitter, 28-PLCC
Manufacturer
Zarlink Semiconductor, Inc.
Datasheet
1.MT8888CP.pdf
(26 pages)
Features
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Applications
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Description
The MT8888C is a monolithic DTMF transceiver with
call progress filter. It is fabricated in CMOS technology
offering low power consumption and high reliability.
TONE
OSC1
OSC2
Central office quality DTMF transmitter/receiver
Low power consumption
High speed Intel micro interface
Adjustable guard time
Automatic tone burst mode
Call progress tone detection to -30dBm
Credit card systems
Paging systems
Repeater systems/mobile radio
Interconnect dialers
Personal computers
IN+
GS
IN-
V
+
-
DD
Oscillator
Circuit
Circuit
V
Bias
Gating Cct.
Tone Burst
Ref
∑
Zarlink, ZL and the Zarlink Semiconductor logo are trademarks of Zarlink Semiconductor Inc.
Tone
Filter
Dial
V
SS
Converters
Copyright 2003, Zarlink Semiconductor Inc. All Rights Reserved.
High Group
Low Group
D/A
Control
Filter
Filter
Logic
Control
Logic
Figure 1 - Functional Block Diagram
Zarlink Semiconductor Inc.
ESt
Row and
Counters
Converter
Column
and Code
Algorithm
Digital
Steering
Logic
St/GT
1
The receiver section is based upon the industry
standard MT8870 DTMF receiver while 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.
The MT8888C utilizes an Intel micro interface, which
allows the device to be connected to a number of
popular microcontrollers with minimal external logic.
Transmit Data
Receive Data
Register
Register
Register
MT8888CE
MT8888CS
MT8888CN
MT8888CP
Register
Status
Control
Register
Control
Integrated DTMF Transceiver
A
B
with Intel Micro Interface
Ordering Information
-40 C to +85 C
20 Pin Plastic DIP
20 Pin SOIC
24 Pin SSOP
28 Pin Plastic LCC
Buffer
Control
Interrupt
Data
Bus
Logic
I/O
MT8888C
Data Sheet
July 2003
D0
D1
D2
D3
IRQ/CP
RD
CS
WR
RS0
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