CMX673D4 Equivalent & Substitute Parts

Part Overview

The CMX673D4 is a telecom interface integrated circuit functioning as a tone detector, housed in a 16-SOIC surface mount package. This device is currently in active product status with 1459 units available in inventory. The CMX673D4 operates across a supply voltage range of 2.7V to 5.5V and is designed for parallel interface applications in telecommunications equipment. Substitute parts become necessary when the primary component reaches end-of-life status, experiences supply constraints, or when design flexibility requires alternative sourcing options while maintaining functional and electrical compatibility.

Substiute Parts

CMX673D4

CML MicrocircuitsIn Stock: 1470CMX673D4 Datasheet

Current PartRFQ

CMX683D4

CML MicrocircuitsIn Stock: 1882CMX683D4 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the CMX673D4 are determined by strict equivalence across the following critical parameters:

• Functional Equivalence: Tone detector function with parallel interface capability
• Electrical Compatibility: Identical supply voltage range (2.7V ~ 5.5V), supply current (1.5mA), and power dissipation (800 mW)
• Thermal Compatibility: Matching operating temperature range (-40°C ~ 85°C)
• Mechanical Compatibility: Identical package type (16-SOIC with 0.295" / 7.50mm width) and surface mount mounting type
• Regulatory Compliance: ROHS3 compliance and MSL rating of 1 (Unlimited)

The CMX683D4 meets all substitution criteria as a parametric equivalent, maintaining identical electrical specifications, package dimensions, and compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

The CMX673D4 is the preferred primary selection due to its active product status and current availability of 1459 units in inventory. This ensures long-term supply continuity and manufacturer support.

The CMX683D4 serves as a parametric equivalent substitute with identical electrical, thermal, and mechanical specifications. However, its obsolete product status indicates limited future availability. The CMX683D4 should be considered only when CMX673D4 supply is constrained or unavailable. Both parts maintain ROHS3 compliance and identical MSL ratings, ensuring regulatory and environmental compatibility in equivalent applications.

Frequently Asked Questions (FAQ)

Q: Can the CMX683D4 replace the CMX673D4 in existing designs?

A: Yes. The CMX683D4 is a parametric equivalent with identical supply voltage (2.7V ~ 5.5V), current consumption (1.5mA), power dissipation (800 mW), operating temperature range (-40°C ~ 85°C), and 16-SOIC package dimensions. Direct substitution is electrically and mechanically compatible.

Q: What is the primary difference between these two parts?

A: The CMX673D4 maintains active product status with current manufacturer support, while the CMX683D4 is obsolete. Both parts are functionally and electrically identical tone detectors with parallel interface capability.

Q: Are there any compliance or certification differences?

A: No. Both the CMX673D4 and CMX683D4 are ROHS3 compliant with MSL rating of 1 (Unlimited), ensuring identical regulatory and environmental compliance.

Q: Which part should be selected for new designs?

A: The CMX673D4 should be selected for new designs due to its active status and assured long-term availability. The CMX683D4 is suitable only as a substitute when CMX673D4 supply is unavailable.

Q: Are the package dimensions identical?

A: Yes. Both parts use the 16-SOIC package with 0.295" (7.50mm) width, ensuring identical PCB footprint and mounting compatibility.