BA6566

Overview

The BA6566 is a speech network integrated circuit designed for handset communications. It amplifies transmitter signals for the telephone line and reception signals for the receiver. The device incorporates automatic gain control (AGC) to compensate for volume fluctuations caused by varying telephone line lengths. It accommodates both dynamic and piezoelectric receivers through simple circuit constant adjustments. The IC minimizes erroneous operation from high-frequency interference and utilizes an HSOP package to eliminate the need for external heat-dissipating transistors, allowing shared circuit designs with DIP packages.

Feature Summary

• Supports both dynamic and piezoelectric receivers via adjustable circuit constants
• Integrates automatic gain control based on transmission and reception line current
• Minimizes erroneous operation caused by high-frequency electrical wave interference
• Uses an HSOP package to eliminate the need for attached heat-dissipating transistors

Applications

• Telephones
• Telephone equipment

Procurement Notes

Verify the specific ordering suffix against official ROHM documentation to confirm pinout compatibility and package type. Ensure the selected variant matches the required thermal management strategy, as the HSOP package design eliminates the need for external heat sinks. Confirm compliance with relevant telecommunications standards before integration into final products.

Selection Notes

Select the appropriate package variant based on thermal requirements and board space constraints. The HSOP package allows for common circuit sharing with DIP versions. Verify that the AGC functionality aligns with the target telephone line current specifications. Ensure the input signal levels are compatible with the amplifier stages for optimal voice quality.

Part Context

The BA6566 belongs to ROHM's communication ICs portfolio, specifically categorized under speech networks. It is part of a family including the BA6566F and BA6566FP variants, which share core functionalities but differ in packaging. These components are engineered for standard analog telephone applications requiring reliable voice transmission and reception.

Replacement Considerations

Cross-reference with other ROHM speech network ICs such as the BA6566F or BA6566FP for pin-compatible alternatives. Verify functional equivalence regarding AGC performance and receiver drive capabilities before substitution.