SAE800

Audio Special Purpose Overview

The Infineon SAE800 is a programmable audio tone processor (Tone Gong) designed for generating single, dual, or triple tones in audio signaling systems. It operates within a supply voltage range of 2.8 V to 18 V and supports junction temperatures from -25°C to +125°C. The device features a constant current output stage capable of driving loads up to 750 mA peak current, with low standby current consumption. It utilizes logic interface signals on trigger pins E1 and E2 to select tone modes and requires minimal external components.

Audio Special Purpose Feature Summary

• Programmable single, dual, or triple-tone generation using external RC oscillator components
• Integrated thermal shutdown and short-circuit protection for robust operation
• Low standby current consumption when not triggered
• Constant current output stage with high efficiency
• Logic interface for tone mode selection via pins E1 and E2

Audio Special Purpose Applications

• Home chime installations
• Audio signaling systems
• Doorbell circuits
• General audio subsystems requiring tone generation

Audio Special Purpose Procurement Notes

This product is End-of-Life (EOL). Verify component availability through authorized distributors as stock may be limited. Confirm RoHS compliance status as indicated in official documentation. Check for moisture sensitivity handling requirements during storage and assembly. Ensure ordering suffixes match specific packaging needs such as tube quantities.

Audio Special Purpose Selection Notes

Select external resistor and capacitor values based on the desired fundamental frequency formula f0 = 5 / (8 * RR * CC). Calculate loudness control resistor RL relative to load impedance RQ to ensure proper amplitude ratios. Verify that the power supply voltage remains within the 2.8 V to 18 V operational range for all intended conditions.

Audio Special Purpose Part Context

The SAE800 belongs to the SAE 800 family of audio tone processors. Variants include the surface-mount SAE800G in PG-DSO-8 packaging. The device serves as a dedicated solution for generating musical tones without complex digital processing, relying on analog circuitry for stability and simplicity in consumer electronics applications.

Audio Special Purpose Replacement Considerations

SAE800G is the surface-mount equivalent in PG-DSO-8 package. SAE800GXLLA1 is another variant within the same functional family. Verify pin compatibility and thermal characteristics when substituting between DIP and SMD packages. Note that the SAE800 series is discontinued; consider alternative tone generators if long-term supply is required.

Audio Special Purpose FAQ

How is the tone mode selected?

Tone mode is determined by the logic states of trigger pins E1 and E2. Triggering both E1 and E2 activates triple-tone mode, triggering only E1 activates single-tone mode, and triggering only E2 activates dual-tone mode.

What is the function of the thermal shutdown feature?

The integrated thermal shutdown monitors chip temperature. If the junction temperature exceeds approximately 170°C, the output current switches to zero. The output re-enables once the temperature cools to approximately 150°C.

How is the oscillator frequency calculated?

The oscillator frequency f0 is set by an external resistor RR and capacitor CC connected to pins ROSC and COSC. The relationship is defined by the formula f0 = 5 / (8 * RR * CC).