MT8889CE1

Manufacturer Part NumberMT8889CE1
DescriptionDIP-20
ManufacturerZarlink Semiconductor
MT8889CE1 datasheet
 


Specifications of MT8889CE1

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Features
Central office quality DTMF transmitter/receiver
Low power consumption
High speed adaptive micro interface
Adjustable guard time
Automatic tone burst mode
Call progress tone detection to -30 dBm
Applications
Credit card systems
Paging systems
Repeater systems/mobile radio
Interconnect dialers
Personal computers
Description
The MT8889C is a monolithic DTMF transceiver with
call progress filter. It is fabricated in CMOS technology
offering low power consumption and high reliability.
D/A
TONE
Converters
Tone Burst
Gating Cct.
IN+
+
Dial
Tone
-
High Group
IN-
Filter
GS
Low Group
OSC1
Oscillator
Circuit
OSC2
Bias
Circuit
V
V
V
DD
Ref
SS
Zarlink, ZL and the Zarlink Semiconductor logo are trademarks of Zarlink Semiconductor Inc.
Copyright 2003-2005, Zarlink Semiconductor Inc. All Rights Reserved.
MT8889CE
MT8889CS
MT8889CN
MT8889CE1
MT8889CS1
MT8889CN1
MT8889CPR
MT8889CSR
MT8889CSR1
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 MT8889C utilizes an adaptive micro interface,
which allows the device to be connected to a number
of popular microcontrollers with minimal external logic.
Row and
Transmit Data
Column
Register
Counters
Status
Register
Control
Logic
Control
Register
Digital
Filter
Algorithm
and Code
Converter
Register
Filter
Control
Receive Data
Steering
Logic
Register
Logic
ESt
St/GT
Figure 1 - Functional Block Diagram
1
Zarlink Semiconductor Inc.
MT8889C
Integrated DTMF Transceiver
with Adaptive Micro Interface
Data Sheet
September 2005
Ordering Information
20 Pin PDIP
Tubes
20 Pin SOIC
Tubes
24 Pin SSOP
Tubes
20 Pin PDIP*
Tubes
20 Pin SOIC*
Tubes
24 Pin SSOP*
Tubes
28 Pin PLCC
Tape & Reel
20 Pin SOIC
Tape & Reel
20 Pin SOIC*
Tape & Reel
*Pb Free Matte Tin
-40°C to +85°C
Data
Bus
Buffer
Interrupt
Logic
A
Control
I/O
Control
B
D0
D1
D2
D3
IRQ/CP
DS/RD
CS
R/W/WR
RS0