The MC34016 is a telephone line interface meant for use in cordless telephone base stations for CT0, CT1, CT2 and DECT. The circuit forms the interface towards the telephone line and performs all speech and line interface functions like dc and ac line termination, 2–4 wire conversion, automatic gain control and hookswitch control. Adjustment of transmission
parameters is accomplished by two 8–bit registers accessible via the integrated serial bus interface and by external components.
• DC Masks for Voltage and Current Regulation
• Supports Passive or Active AC Set Impedance Applications
• Double Wheatstone Bridge Sidetone Architecture
• Symmetrical Inputs and Outputs with Large Signal Swing Capability
• Gain Setting and Mute Function for Tx and Rx Amplifiers
• Very Low Noise Performance
• Serial Bus Interface SPI Compatible
• Operation from 3.0 to 5.5 V

FEATURES
Line Driver Architecture
• Two DC Masks for Voltage Regulation
• Two DC Masks for Current Regulation
• Passive or Active Set Impedance Adjustment
• Double Wheatstone Bridge Architecture
• Automatic Gain Control Function

Transmit Channel
• Symmetrical Inputs Capable of Handling Large Voltage Swing
• Gain Select Option via Serial Bus Interface
• Transmit Mute Function, Programmable via Bus
• Large Voltage Swing Capability at the Telephone Line

Receive Channel
• Double Sidetone Architecture for Optimum Line Matching
• Symmetrical Outputs Capable of Producing High Voltage Swing
• Gain Select Option via Serial Bus Interface
• Receive Mute Function, Programmable via Serial Bus

Serial Bus Interface
• 3–Wire Connection to Microcontroller
• One Programmable Output Meant for Driving a Hookswitch
• Two Programmable Outputs Capable of Driving Low Ohmic Loads
• Two 8–Bit Registers for Parameter Adjustment


MC34016P
MC34016DW

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GENERAL DESCRIPTION
The W742S82A is a high-performance 4-bit micro controller (μC) that provides an LCD driver. The device contains a 4-bit ALU, two 8-bit timers, two dividers (for two oscillators) in dual-clock operation, a 40 X 4 LCD driver, six 4-bit I/O ports (including 1 output port for LED driving), and one channel DTMF generator. There are also five interrupt sources and 16-levels of subroutine nesting for interrupt applications. The W742S82A operates on very low current and has two power reduction modes, are the dual-clock slow operation and STOP mode, which help to minimize power dissipation

FEATURES
• Operating voltage: 2.4V – 5.5V
• Dual-clock operation or single-clock operation (By option)
• Main-oscillator
− Connect to 3.58 MHz crystal or 400 KHz that can be selected by option code
− Crystal or RC oscillator can be selected by code option
• Sub-oscillator
− Connect to 32768 Hz crystal only
• Memory
− 16384 x 16 bits program MASK ROM (including 64K x 4 bit look-up table)
− 2048 x 4 bits data RAM (including 16 nibbles x 16 pages working registers)
− 40 x 4 LCD data RAM
• 24 input/output pins
− Port for input only: 1 ports/4 pins (RC)
− Input/output ports: 3 ports/12 pins (RA, RB & RD)
− High sink current output port for LED driving: 1 port /4 pins (RE)
− Port for output only: 1 port/ 4 pins (RF)
• Power-down mode
− Hold function: no operation (main-oscillator and sub-oscillator still operate)
− Stop function: no operation (main-oscillator and sub-oscillator are stopped)
− Dual-clock slow operation mode: the system will operate by the sub-oscillator (FOSC = Fs and Fm is stopped)
• Five types of interrupts
− Four internal interrupts (Divider0, Divider1, Timer 0, Timer 1)
− One external interrupts (RC Port)
• LCD driver output
− 40 segments x 4 commons
− 1/4 duty 1/3 bias driving mode
− Clock source should be the sub-oscillator clock in the dual-clock operation mode
• MFP output pin
− Output is software selectable as modulating or non-modulating frequency
− Works as frequency output specified by Timer 1
• DTMF output pin
− Output is one channel Dual Tone Multi-Frequency signal for dialing
• Two built-in 14-bit frequency dividers
− Divider0: the clock source is the output of the main-oscillator
− Divider1: the clock source is the output of the sub-oscillator (dual-clock mode) or the Fosc/128 (single-clock mode)
• Two built-in 8-bit programmable countdown timers
− Timer 0: one of two internal clock frequencies (FOSC/4 or FOSC/1024) can be selected
− Timer 1: with auto-reload function and one of three internal clock frequencies (FOSC, FOSC/64 or Fs) can be selected by MR1 register; and the specified frequency can be delivered to MFP pin
• Built-in 18/15-bit watchdog timer selectable for system reset; enable the watchdog timer or not is determined by code option
• Powerful instruction set
• 16-levels subroutine (include interrupt) nesting

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Description
The XE0055CS2 is an extremely compact, high-performance telephone interface module. The XE0055CS2 meets the technical requirements for V.34bis operation yet fills less than one quarter cubic inch of space. The XE0055CS2 complies with FCC Part 68 Rules simplifying certification of the completed system.
The XE0055CS2 is a low power design operating from a single +5 volt power supply. As with all Xecom telephone interface modules, internal ring indication and switch hook are provided to establish the telephone line connection.
The XE0055CS2 also includes advanced features for Computer Telephone Integration (CTI) applications.
The XE0055CS2 incorporates Caller ID access and a continuous Connect Detect monitor. Connect Detect reports the current availability of the local telephone line. With these features the host can screen incoming calls and intiate outgoing calls only when the line is available.

Features
* Small Size: 2.0" long by 0.5" wide by 0.27" thick;
* V.34bis compatible for data transfer at speeds up to 33,600 bps;
* FCC Part 68 Compliant;
* Integrated Ring Detect Circuit;
* Provides an on-hook signal path for monitoring the Caller ID Signal
* Integrated Connect Detect circuit continually monitors the availbility of the local telephone line
* Single 5 Volt Power Supply
* Integrated Solid-State Switch Hook
* Provides a 1500 volt isolation barrier between the Telephone Line and all other circuits


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Description
Cordless telephone signal processor reduces the need for many external components.

Features
RF Receiver Part
IF converter, FM demodulator, RSSI-digital information

LF Part
Microphone amplifier, earpiece amplifier, compander, preemphasis, deemphasis, scrambler, descrambler, digital power management, data management by FSK coding, transmit and receive part adjustable and mutable by serial bus, compander, pre-/ de-emphasis, scrambler with bypass function

Application
CT1, CT1P, 900 MHz USA standard

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