MC145158DW2 Equivalent & Substitute Parts

Part Overview

The MC145158DW2 is a PLL Clock/Frequency Synthesizer IC manufactured by NXP USA Inc., designed for clock and frequency synthesis applications. This 16-SOIC surface mount device operates across a supply voltage range of 3V to 9V with a maximum frequency of 25MHz and supports an operating temperature range of -40°C to 85°C.

The MC145158DW2 is classified as obsolete. Due to its discontinued status, identifying functionally compatible substitute components is essential for system redesign, legacy product support, and procurement continuity.

Substiute Parts

MC145158DW2

NXP USA Inc.In Stock: 3956MC145158DW2 Datasheet

Current PartRFQ

AD809BRZ

Analog Devices Inc.In Stock: 3682AD809BRZ Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MC145158DW2 is determined by the following critical parameters:

• Package Compatibility: Both parts must use 16-SOIC surface mount packaging to ensure PCB layout compatibility
• Functional Classification: Both must operate as PLL Clock/Frequency Synthesizer ICs with single circuit configuration
• Operating Temperature Range: Substitute must support the full -40°C to 85°C operating window
• Supply Voltage Compatibility: The substitute's supply voltage range must accommodate the application's power delivery specifications
• Frequency Capability: The substitute must support the required frequency range for the target application

The AD809BRZ is identified as a manufacturer-recommended substitute based on shared package type (16-SOIC), functional classification (Clock/Frequency Synthesizer), and overlapping operating temperature specifications.

Parameter Comparison

Engineering Selection Recommendations

Product Status Consideration: The MC145158DW2 is obsolete, while the AD809BRZ is active and in production. Selection of an active component ensures long-term availability and supply chain stability.

Compliance Status: The AD809BRZ is ROHS3 compliant, whereas the MC145158DW2 is RoHS non-compliant. For applications subject to RoHS regulations or environmental compliance requirements, the AD809BRZ provides regulatory alignment.

Package Footprint Difference: Both devices use 16-SOIC packaging but with different physical dimensions (0.295" vs. 0.154" width). PCB layout modifications may be required to accommodate the AD809BRZ footprint.

Supply Voltage Range: The AD809BRZ operates within 4.5V to 5.5V, which is narrower than the MC145158DW2 range of 3V to 9V. Verify that the application's power supply specifications fall within the AD809BRZ operating window.

Frequency and Functional Differences: The AD809BRZ supports significantly higher maximum frequency (155.52MHz vs. 25MHz) and features different input/output signal types (CMOS, ECL, PECL, TTL inputs; ECL, PECL outputs). Application-specific frequency and signal interface requirements must be evaluated.

Frequently Asked Questions (FAQ)

Q: Can the AD809BRZ directly replace the MC145158DW2 without circuit modifications?

A: Direct replacement is not guaranteed. While both devices share 16-SOIC packaging and operate across the -40°C to 85°C temperature range, differences in supply voltage requirements (4.5V–5.5V vs. 3V–9V), input/output signal types, and frequency capabilities require circuit-level evaluation. PCB layout adjustments may also be necessary due to different package dimensions.

Q: What are the key differences between these two parts?

A: The primary differences are: (1) Supply voltage range—AD809BRZ requires 4.5V–5.5V versus MC145158DW2's 3V–9V flexibility; (2) Maximum frequency—AD809BRZ supports 155.52MHz versus MC145158DW2's 25MHz; (3) Input/output signal compatibility—AD809BRZ supports CMOS, ECL, PECL, and TTL inputs with ECL and PECL outputs, while MC145158DW2 uses standard clock inputs/outputs; (4) Product status—AD809BRZ is active and ROHS3 compliant, while MC145158DW2 is obsolete and RoHS non-compliant.

Q: Are there any package compatibility concerns?

A: Both parts use 16-SOIC surface mount packaging, but with different physical dimensions. The MC145158DW2 measures 0.295" in width, while the AD809BRZ measures 0.154" in width. This dimensional difference may require PCB footprint adjustments and revalidation of board layout spacing and trace routing.

Q: What should be verified before implementing the AD809BRZ as a substitute?

A: Verify that the application's supply voltage specification falls within 4.5V–5.5V, confirm that the required frequency range does not exceed 155.52MHz, ensure that the input and output signal types (CMOS, ECL, PECL, TTL) are compatible with the system interface, and validate PCB layout compatibility with the different package dimensions.

Q: Is the AD809BRZ suitable for legacy product support applications?

A: The AD809BRZ is active and in production, making it suitable for ongoing procurement and support. However, functional and electrical differences must be thoroughly evaluated to ensure compatibility with the original system design. Legacy applications may require circuit redesign or signal conditioning to accommodate the AD809BRZ's different operating characteristics.