DS2132A

Overview

The DS2132A is a digital answering machine processor optimized for speech compression and expansion. It supports two algorithms: Standard Record/Playback at 9.8Kbps and Extended Record/Playback at 4.9Kbps, enabling up to 14 minutes of storage in a single 4 Mbit DRAM. The device operates on a +5V supply (4.5V to 5.5V) with an active current of 40mA typical. It features a three-wire data/control/status port for microcontroller interfacing, DTMF tone detection/generation, and CCITT T.30 FAX calling tone detection. Available in 28-pin DIP or PLCC packages.

Feature Summary

• Dual high-quality speech compression algorithms for extended storage capacity
• Integrated DTMF receiver and generator supporting all standard tones
• Dedicated interface for CCITT T.30 FAX calling tone detection
• Three-wire serial port simplifies microcontroller integration

Applications

• Digital answering machines
• Voice mail systems
• Voice annunciators
• Embedded voice messaging devices

Procurement Notes

Verify component authenticity through authorized distributors or manufacturer channels. Confirm package type matches system requirements, as the DS2132A is available in both 28-pin DIP and PLCC formats. Check for RoHS compliance status if environmental regulations apply to the target assembly. Ensure proper handling procedures are followed due to moisture sensitivity classifications associated with this component family.

Selection Notes

Select the DS2132A when maximizing speech storage in limited memory spaces is critical. Choose between the Standard (9.8Kbps) and Extended (4.9Kbps) compression rates based on required recording duration versus fidelity needs. Ensure the host microcontroller can support the required three-wire serial interface timing. Verify that the external CODEC selected supports μ-law companding for compatibility with the PCM port.

Part Context

The DS2132A belongs to the Dallas Semiconductor/Maxim Integrated line of specialized DSP processors designed for telephony applications. It serves as a core processing unit for managing audio data flow between analog codecs and digital storage. The device integrates signal processing capabilities directly into the interface layer, reducing the computational load on the main system microcontroller.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Evaluate functional equivalents based on pin compatibility, supported compression algorithms, and interface protocols. Verify that any replacement component maintains the same voltage requirements and package dimensions for direct board substitution.