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• Electronic Replacement for
Electromechanical Telephone Bell When Used With Transducer
• Designed to Meet or Exceed FCC Part 68
Class B Ringer Requirements
• Low-Cost External Component
Requirements
• Low External Component Count • High Standby Input Impedance
1 MΩ Typ
• Low Ringer Equivalency Number
< 1 Typ
• Single-Ended High-Voltage Output
Compatible With Piezo Transducer or Transformer-Coupled Speaker
• Reliable BIDFET‡ Process Technology
Provides Efficient High-Voltage Operation
• On-Chip High-Voltage Full-Wave Diode
Bridge Rectifier and Output Voltage Regulator
• On-Chip Circuitry Provides Ring Rejection
of Rotary Dial Transients, Lightning, and Induced High-Voltage Transients
• On-Chip Thyristor Coupled With Additional
External Components Provides Enhanced Rejection of Dial Pulse
TCM1501B Datasheet
