CMX138AE1.pdf
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The CMX138AE1 is an audio scrambler and sub-audio signalling processor for analogue two-way radio systems. It integrates both voice-band audio processing and signalling functions such as scrambling, companding, and CTCSS/DCS handling, enabling designers to implement privacy voice and radio signalling features with simplified system design.
With a host interface (C-BUS) and auxiliary conversion blocks (ADC/DAC), it supports flexible control and integration in radio architectures where the voice path and sub-audio signalling must be processed reliably across varying field conditions.
Based on current market references, CMX138AE1 does not have a true pin-to-pin direct equivalent. If you only need functionally similar options (not pin compatible; redesign required), commonly referenced alternatives include:
• TPA5050RSAT / TPA5050RSAR (Texas Instruments) - functionally similar
• TPA5052RSAT / TPA5052RSAR (Texas Instruments) - functionally similar
Note: These are not drop-in replacements. Please validate interfaces, audio chain behavior and system requirements before substitution.
Key features typically highlighted for CMX138AE1 include:
• Programmable audio scrambler
• Concurrent audio and signalling operations
• Full audio-band processing (pre/de-emphasis, companding, selectable filters)
• Sub-audio signalling support: CTCSS / DCS
• Auxiliary ADC and auxiliary DAC
• C-BUS serial interface to host microcontroller
• Low-power operation (commonly around 3.0 V to 3.6 V)
• Available in 28-pin TSSOP package
The CMX138AE1 is packaged in TSSOP-28. It includes pins for power/ground, audio inputs/outputs, control and serial interface (C-BUS), and clock/control related signals.
For the exact pin function mapping, please refer to the official CMX138A series datasheet.
The manufacturer of the CMX138AE1 is CML Microcircuits. CML focuses on mixed-signal ICs for professional and commercial communication systems, including audio processing and signalling solutions used in analogue radio designs.
Typical application fields include:
• Analogue two-way radios (handheld, mobile, base units)
• Voice scrambling / privacy voice systems
• Professional and commercial radio communication equipment
• FRS / PMR446 / MURS / GMRS related analogue radio designs
The CMX138AE1 package type is TSSOP-28 (surface-mount).
We currently provide peer-to-peer order processing. Submit an RFQ for CMX138AE1, and our professional agent will contact you with competitive global pricing and guide you to complete the order once you accept the offer.
Our experienced QC team strictly verifies and tests CMX138AE1. Only qualified suppliers who pass our audit can list CMX138AE1 on OEM STOCK GLOBAL LIMITED. We pay close attention to sourcing channels and product quality so you can purchase with confidence.
Pricing and inventory for CMX138AE1 fluctuate and are updated periodically (typically within 24 hours). Quotations generally remain valid for 5 days unless otherwise stated.
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We support DHL, UPS, FedEx, TNT, and Registered Mail. Shipping insurance is available. After dispatch, you will receive an email with tracking information. Note: Carriers may take up to 24 hours to show tracking events. Typical transit time: 3–5 days by express; 25–60 days by registered mail.
We perform Pre-Shipment Inspection (PSI) on randomly selected units before shipping. If there is an issue with CMX138AE1, returns/replacements are accepted when:
Steps: (1) Inform us within 90 days; (2) Obtain Return Authorization (RMA) before sending items back.
Please contact us for technical documents and support related to CML Micro CMX138AE1, including pin diagrams and datasheets. Our team will respond promptly.






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