CD4097BME4 Equivalent & Substitute Parts

Part Overview

The CD4097BME4 is a dual 8:1 multiplexer/demultiplexer interface circuit manufactured by Texas Instruments in 24-SOIC surface mount packaging. This component functions as a 2-circuit switch with 8:1 channel selection capability, designed for analog signal routing and switching applications. The part is currently in Last Time Buy status, indicating discontinued production. Identifying equivalent and substitute parts is necessary to ensure design continuity and maintain supply chain reliability for applications currently utilizing this component.

Substiute Parts

CD4097BME4

Texas InstrumentsIn Stock: 1064CD4097BME4 Datasheet

Current PartRFQ

CD4051BM96

Texas InstrumentsIn Stock: 155137CD4051BM96 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CD4097BME4 is constrained by the following critical parameters:

Circuit Configuration: The CD4097BME4 contains 2 independent 8:1 multiplexer circuits. Substitute parts must provide equivalent switching functionality with matching channel counts and selection logic.

Electrical Performance: On-state resistance of 240Ω maximum and channel-to-channel matching of 5Ω maximum define the switching characteristics. Substitute parts must maintain these specifications to preserve signal integrity and crosstalk performance.

Supply Voltage Range: Single supply operation from 3V to 18V is a core requirement. Substitute parts must support this voltage range or a compatible subset.

Bandwidth and Frequency Response: The -3dB bandwidth of 20MHz establishes the maximum signal frequency capability. Substitute parts must meet or exceed this specification.

Leakage Current: Maximum off-state leakage of 100nA defines the isolation quality between channels. Substitute parts must not exceed this specification.

Package and Thermal Characteristics: The 24-SOIC surface mount package with specified dimensions and MSL rating of 1 are manufacturing and assembly requirements.

Compliance: ROHS3 compliance and REACH unaffected status are regulatory requirements that substitute parts must maintain.

The CD4051BM96 is identified as a manufacturer-recommended substitute based on functional equivalence within the allowed parameter set, despite differences in circuit count and packaging.

Parameter Comparison

Engineering Selection Recommendations

The CD4051BM96 is the manufacturer-recommended substitute for the CD4097BME4. Both components are manufactured by Texas Instruments and maintain identical electrical performance specifications for on-state resistance, channel matching, bandwidth, and leakage current characteristics.

The primary design consideration is circuit count: the CD4097BME4 provides 2 independent 8:1 multiplexer circuits, while the CD4051BM96 provides 1 circuit. Applications requiring dual-channel switching must either implement two CD4051BM96 devices or identify alternative dual-circuit solutions.

The CD4051BM96 offers an extended single supply voltage range (3V to 20V versus 3V to 18V) and includes dual supply capability (±2.5V to ±9V), providing greater flexibility for diverse power supply architectures. The substitute part maintains ROHS3 compliance and MSL rating of 1, ensuring compatibility with standard manufacturing and assembly processes.

Package differences exist: the CD4097BME4 uses 24-SOIC (7.50mm width) while the CD4051BM96 uses 16-SOIC (3.90mm width). PCB layout modifications are required for package substitution. The CD4051BM96 is currently in Active product status, ensuring long-term availability and supply continuity.

Frequently Asked Questions (FAQ)

Q: Can the CD4051BM96 directly replace the CD4097BME4 in existing designs?

A: Direct pin-for-pin replacement is not possible due to different package types (24-SOIC versus 16-SOIC) and different circuit counts (1 versus 2). PCB redesign is required. Applications requiring dual-channel functionality must implement two CD4051BM96 devices or identify alternative dual-circuit multiplexer solutions.

Q: What are the key electrical parameters that determine substitution compatibility?

A: On-state resistance (240Ω maximum), channel-to-channel matching (5Ω maximum), -3dB bandwidth (20MHz), leakage current (100nA maximum), and operating temperature range (-55°C to 125°C) are the primary electrical parameters. The CD4051BM96 meets all these specifications.

Q: Does the CD4051BM96 support the same supply voltage range as the CD4097BME4?

A: The CD4051BM96 supports single supply operation from 3V to 20V, which encompasses the CD4097BME4 range of 3V to 18V. Additionally, the CD4051BM96 supports dual supply operation (±2.5V to ±9V), which the CD4097BME4 does not provide.

Q: Are there compliance or regulatory differences between these parts?

A: Both components are ROHS3 compliant, REACH unaffected, and carry MSL rating of 1 (Unlimited). No compliance or regulatory barriers exist for substitution.

Q: What is the significance of the different channel capacitance values?

A: The CD4097BME4 specifies channel capacitance of 0.2pF (CS(off)) and 35pF (CD(off)), while the CD4051BM96 specifies 0.2pF (CS(off)) and 30pF (CD(off)). The 5pF difference in CD(off) is within typical manufacturing tolerance and does not affect functional compatibility for standard switching applications.

Q: Why is the CD4097BME4 in Last Time Buy status?

A: Last Time Buy status indicates the manufacturer has discontinued production. The CD4051BM96 is in Active status, ensuring continued availability and supply chain reliability for new designs and production requirements.