CD4097BPW Equivalent & Substitute Parts

Part Overview

The CD4097BPW is a dual 8:1 multiplexer/demultiplexer IC manufactured by Texas Instruments, housed in a 24-TSSOP surface mount package. This component functions as a 2-circuit analog switch with 240Ohm on-state resistance, designed for signal routing and selection applications across a wide supply voltage range of 3V to 18V. The CD4097BPW is currently in Last Time Buy status, indicating discontinued production. Identifying equivalent substitute parts is necessary to ensure design continuity and maintain component availability for new production runs and system maintenance.

Substiute Parts

CD4097BPW

Texas InstrumentsIn Stock: 3907CD4097BPW Datasheet

Current PartRFQ

CD4051BPWR

Texas InstrumentsIn Stock: 15708CD4051BPWR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CD4097BPW is constrained by the following critical parameters:

• Multiplexer Configuration: 8:1 channel selection capability is mandatory
• On-State Resistance: 240Ohm maximum specification must be maintained
• Supply Voltage Compatibility: Operating range must encompass the 3V to 18V single supply specification
• Bandwidth Performance: 20MHz -3dB bandwidth requirement for signal integrity
• Leakage Current: 100nA maximum specification for low-power applications
• Operating Temperature Range: -55°C to 125°C thermal envelope
• Surface Mount Packaging: TSSOP package family for PCB compatibility
• Compliance Standards: ROHS3 compliance and REACH unaffected status

The CD4051BPWR qualifies as a substitute despite architectural differences. While the CD4051BPWR is a single-circuit (1-circuit) 8:1 multiplexer compared to the dual-circuit CD4097BPW, it meets all critical electrical parameters. The CD4051BPWR maintains 240Ohm on-state resistance, 5Ohm channel matching, 20MHz bandwidth, and 100nA leakage current specifications. Its supply voltage range (3V ~ 20V single supply, ±2.5V ~ 9V dual supply) encompasses the CD4097BPW requirement. The 16-TSSOP package maintains surface mount compatibility with equivalent pitch and thermal characteristics.

Parameter Comparison

Engineering Selection Recommendations

The CD4051BPWR is an active product with current manufacturing status, providing long-term component availability compared to the CD4097BPW Last Time Buy designation. Both parts maintain identical ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment for new designs.

Selection between these parts depends on circuit architecture requirements. The CD4097BPW dual-circuit configuration supports simultaneous independent 8:1 multiplexing of two signal paths within a single package. The CD4051BPWR single-circuit configuration requires two devices to achieve equivalent dual-channel functionality, increasing board space and component count.

Electrical performance is equivalent across all critical parameters: on-state resistance, channel matching, bandwidth, leakage current, and operating temperature range. The CD4051BPWR supply voltage range (3V ~ 20V single supply) provides extended headroom above the CD4097BPW specification (3V ~ 18V), with additional dual supply capability (±2.5V ~ 9V) for bipolar supply applications.

Package differences (24-TSSOP versus 16-TSSOP) reflect the circuit count reduction and require PCB layout modification. Both packages maintain equivalent pitch and thermal characteristics for surface mount assembly.

Frequently Asked Questions (FAQ)

Q: Can the CD4051BPWR directly replace the CD4097BPW in existing designs?

A: Direct pin-for-pin replacement is not possible due to different package pin counts (16-TSSOP versus 24-TSSOP) and circuit architecture (single versus dual). PCB redesign is required. However, electrical performance specifications are equivalent, allowing functional substitution with circuit topology modifications.

Q: What is the primary limitation of using CD4051BPWR as a substitute?

A: The CD4051BPWR is a single-circuit device, whereas the CD4097BPW integrates two independent 8:1 multiplexer circuits. Designs requiring dual-channel multiplexing must either use two CD4051BPWR devices or select an alternative dual-circuit multiplexer IC.

Q: Are there supply voltage compatibility concerns?

A: No. The CD4051BPWR single supply range (3V ~ 20V) fully encompasses the CD4097BPW requirement (3V ~ 18V). The CD4051BPWR additionally supports dual supply operation (±2.5V ~ 9V), providing design flexibility not available in the CD4097BPW.

Q: How do the on-state resistance specifications compare?

A: Both parts specify 240Ohm maximum on-state resistance with 5Ohm channel-to-channel matching. Signal attenuation and impedance characteristics are identical across the 8:1 channel selection range.

Q: What are the package implications for PCB assembly?

A: The CD4097BPW 24-TSSOP package accommodates dual-circuit integration in a larger footprint. The CD4051BPWR 16-TSSOP package is smaller but requires separate devices for dual-channel applications. Both packages use identical 0.173" (4.40mm) width and pitch specifications, maintaining compatibility with standard surface mount assembly equipment.

Q: Are there thermal or reliability differences?

A: Both parts operate across -55°C to 125°C temperature range with MSL 1 (Unlimited) moisture sensitivity rating. Thermal and reliability characteristics are equivalent. The CD4051BPWR active product status ensures continued manufacturing support and supply chain stability.

Q: Can bandwidth performance be affected by substitution?

A: No. Both parts specify 20MHz -3dB bandwidth. Signal integrity and frequency response characteristics remain unchanged. Channel capacitance values (CD4097BPW: 0.2pF/35pF; CD4051BPWR: 0.2pF/30pF) are comparable, with the CD4051BPWR showing slightly lower off-state drain capacitance.