LMC567集成电路（IC）的电信规格书PDF中文资料

LMC567属于集成电路（IC）的电信。由德州仪器制造生产的LMC567电信电信接口集成电路 (IC) 为通信网络接口提供特定功能和控制，例如以太网切换、线路驱动器、ISDN、放大器、通道扩展器、数字锁相环、DTMF、音频发生器和解码器、回声消除、检测器和发生器、DDA、电话线路监控器和主叫号码标识。

1 Features

1• Functionally Similar to LM567

• 2-V to 9-V Supply Voltage Range

• Low Supply Current Drain

• No Increase in Current With Output Activated

• Operates to 500-kHz Input Frequency

• High Oscillator Stability

• Ground-Referenced Input

• Hysteresis Added to Amplitude Comparator

• Out-of-Band Signals and Noise Rejected

• 20-mA Output Current Capability

2 Applications

• Touch-Tone Decoding

• Precision Oscillators

• Frequency Monitoring and Control

• Wide-Band FSK Demodulation

• Ultrasonic Controls

• Carrier Current Remote Controls

• Communications Paging Decoders

3 Description

The LMC567 device is a low-power, general-purpose

LMCMOS tone decoder which is functionally similar to the industry standard LM567. The device consists

of a twice frequency voltage-controlled oscillator

(VCO) and quadrature dividers which establish the

reference signals for phase and amplitude detectors.

The phase detector and VCO form a phase-locked

loop (PLL) which locks to an input signal frequency which is within the control range of the VCO. When

the PLL is locked and the input signal amplitude

exceeds an internally pre-set threshold, a switch to

ground is activated on the output pin. External

components set up the oscillator to run at twice the

input frequency and determine the phase and amplitude filter time constants.