Datasheet Summary
DUAL SPM/SECURITY DETECTOR/GENERATOR
D641A/5 January 2002
Features
- Two (12kHz/16kHz) SPM Detectors
- Selectable 12kHz/16kHz ASK Generator
- Selectable Tone Follower or Packet
Mode 3-State Outputs
- Excellent Speech-Band Rejection
- Hardwired Control for Non-µC Systems
- Selectable Bandwidth Limits and Stable
Centre Frequency from a Standard Xtal
Applications
Provisional Information
- SPM for Pair-Gain Systems
- Payphone Security Applications
- Call Charge Applications in PBX and PABX Line Cards
- Out-of-Band Signalling Systems
- Low-Voltage FX/MX641 Replacement
- µC Software-Programmable Secure Payphone Call Charging Apparatus
1.1 Brief Description
The CMX641A is a low...