LMX2324TM Equivalent & Substitute Parts

Part Overview

The LMX2324TM is a PLL Frequency Synthesizer IC manufactured by Texas Instruments, designed for clock and timing applications with a maximum frequency of 2GHz. This device operates across a supply voltage range of 2.7V to 5.5V and is housed in a 16-TSSOP surface mount package. The LMX2324TM is classified as obsolete, making identification of functionally compatible substitute components essential for ongoing system support and new design implementations.

Substiute Parts

LMX2324TM

Texas InstrumentsIn Stock: 282641LMX2324TM Datasheet

Current PartRFQ

ADF4118BRUZ

Analog Devices Inc.In Stock: 7240ADF4118BRUZ Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LMX2324TM is determined by the following critical parameters:

• Package compatibility: 16-TSSOP (0.173", 4.40mm Width) surface mount package
• Supply voltage range: 2.7V ~ 5.5V
• Input signal compatibility: CMOS and TTL logic levels
• Output type: Clock signal generation
• Operating temperature range: -40°C ~ 85°C
• PLL functionality: Frequency synthesis capability

The ADF4118BRUZ qualifies as a substitute based on matching package type, supply voltage range, input/output signal compatibility, operating temperature range, and PLL frequency synthesis functionality. While the ADF4118BRUZ supports a higher maximum frequency (3GHz) and features a 2:1 input-to-output ratio compared to the 1:1 ratio of the LMX2324TM, these parameters represent enhanced capabilities that maintain backward compatibility for applications requiring the LMX2324TM's 2GHz maximum frequency specification.

Parameter Comparison

Engineering Selection Recommendations

The ADF4118BRUZ is the qualified substitute for the LMX2324TM based on electrical and mechanical parameter alignment. Key selection considerations include:

The ADF4118BRUZ maintains active product status with ROHS3 compliance, addressing the obsolescence and regulatory limitations of the LMX2324TM. Both devices share identical package geometry, supply voltage specifications, and operating temperature ranges, ensuring mechanical and electrical compatibility in existing PCB layouts and power distribution networks.

The ADF4118BRUZ's higher maximum frequency rating (3GHz versus 2GHz) and differential input capability represent functional enhancements that do not compromise backward compatibility. Applications designed for the LMX2324TM's 2GHz specification operate within the ADF4118BRUZ's performance envelope.

For new designs or system refreshes, the ADF4118BRUZ is the appropriate selection due to its active status and regulatory compliance. For legacy system maintenance requiring exact form-fit-function replacement, the LMX2324TM remains available in existing inventory (282,600 pieces) until stock depletion.

Frequently Asked Questions (FAQ)

Q: Can the ADF4118BRUZ directly replace the LMX2324TM in existing designs?

A: Yes. Both devices share the 16-TSSOP package, identical supply voltage range (2.7V ~ 5.5V), matching operating temperature range (-40°C ~ 85°C), and compatible CMOS/TTL input and clock output specifications. PCB layout and schematic modifications are not required for substitution.

Q: What is the significance of the 2:1 input-to-output ratio in the ADF4118BRUZ compared to the 1:1 ratio in the LMX2324TM?

A: The input-to-output ratio describes the frequency relationship between input and output signals. The ADF4118BRUZ's 2:1 ratio indicates the output frequency is twice the input frequency, while the LMX2324TM maintains a 1:1 relationship. This difference does not prevent substitution; it reflects the ADF4118BRUZ's enhanced frequency synthesis capability.

Q: Are there compliance differences between these parts?

A: Yes. The LMX2324TM is RoHS non-compliant and obsolete. The ADF4118BRUZ is ROHS3 compliant and maintains active product status. For applications subject to RoHS regulations or requiring long-term component availability, the ADF4118BRUZ is the appropriate selection.

Q: Does the ADF4118BRUZ's higher maximum frequency (3GHz) affect compatibility with 2GHz applications?

A: No. Higher maximum frequency ratings indicate expanded operational capability. Applications designed for 2GHz operation function within the ADF4118BRUZ's performance specification without modification.

Q: What packaging format is the ADF4118BRUZ supplied in?

A: The ADF4118BRUZ is supplied in tube packaging, consistent with standard surface mount component distribution for the 16-TSSOP package type.