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CMX138AE1

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CML Micro CMX138AE1Sell Excess Inventory

Part No.:
CMX138AE1
Manufacturer:
CML Micro
Category:
Audio Special Purpose
Package:
28-TSSOP (0.173", 4.40mm Width)
Datasheet:
OEM STOCKCMX138AE1.pdf
Description:
Device for scrambling audio and processing sub-audio signals
Quantity:

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Product details

CMX138AE1: Audio Scrambler & Sub-Audio Signalling Processor (CTCSS/DCS) for Analogue Two-Way Radio Systems
The CMX138AE1 from CML Microcircuits is an audio-band processing IC designed for analogue radio voice paths. It combines programmable scrambling, companding, audio conditioning (pre/de-emphasis and selectable filters), and sub-audio signalling (CTCSS/DCS), helping engineers build privacy/feature audio chains in handheld, mobile, and base radio designs with low power operation.

Key Analysis Of The Chips

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.

Key Blocks

Equivalent

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.

Features

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

Pinout

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.

Manufacturer

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.

Application Field

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

Package

The CMX138AE1 package type is TSSOP-28 (surface-mount).

Disclaimer

The information above is provided for reference and may vary by revision, ordering code, and system conditions. For design-in and replacement decisions, always review the latest official manufacturer documentation and validate performance in your own application.
  • Specifications
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Attributes
Property Value
Manufacturer
CML Micro
Series:
-
Package/Case:
28-TSSOP (0.173", 4.40mm Width)
Packaging:
Tube
Part Status:
Active
Function:
Audio Signal Processor
Applications:
Audio Systems
Interface:
Serial
Voltage - Supply:
3V ~ 3.6V
Operating Temperature:
-40°C ~ 85°C
Number of Channels:
1
Specifications:
-
Mounting Style:
Surface Mount
Grade:
-
Category:
Audio Special Purpose
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3) Are the price and inventory for CMX138AE1 accurate?

Pricing and inventory for CMX138AE1 fluctuate and are updated periodically (typically within 24 hours). Quotations generally remain valid for 5 days unless otherwise stated.

4) What payment methods are accepted?

Wire Transfer, PayPal, Alipay, WeChat Pay, Credit Card, Western Union, MoneyGram, and Escrow are supported. Note: Some payment methods may incur a handling fee.

5) How is shipping arranged?

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.

6) What is the process for return or replacement of CMX138AE1?

We perform Pre-Shipment Inspection (PSI) on randomly selected units before shipping. If there is an issue with CMX138AE1, returns/replacements are accepted when:

  • Quantity shortages, wrong items, or obvious external defects (e.g., damage, rust) are confirmed by us;
  • We are notified within 90 days of delivery;
  • The part is unused and in its original, unopened packaging.

Steps: (1) Inform us within 90 days; (2) Obtain Return Authorization (RMA) before sending items back.

7) How to get technical support (pinout, datasheet) for CMX138AE1?

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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