CD4097BM Equivalent & Substitute Parts

Part Overview

The CD4097BM is a dual 8:1 multiplexer/demultiplexer integrated circuit manufactured by Texas Instruments, housed in a 24-SOIC surface mount package. This device functions as a 2-circuit switch with 8:1 channel selection capability, featuring 240Ohm on-state resistance per channel. The CD4097BM is classified as Last Time Buy, indicating discontinued production status. Alternative components are necessary for new designs and ongoing procurement requirements.

Key Parameters

Parameter	Value
Multiplexer/Demultiplexer Circuit Configuration	8:1
Number of Circuits	2
On-State Resistance (Max)	240Ohm
Channel-to-Channel Matching (ΔRon)	5Ohm
Voltage - Supply, Single (V+)	3V ~ 18V
-3dB Bandwidth	20MHz
Channel Capacitance (CS(off), CD(off))	0.2pF, 35pF
Current - Leakage (IS(off)) (Max)	100nA
Operating Temperature	-55°C ~ 125°C (TA)
Package / Case	24-SOIC (0.295", 7.50mm Width)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the CD4097BM is based on the following critical parameters that must remain compatible:

Multiplexer Configuration: 8:1 channel selection capability
On-State Resistance: 240Ohm maximum specification
Channel-to-Channel Matching: 5Ohm tolerance
Supply Voltage Range: Minimum 3V single supply capability
Bandwidth Performance: 20MHz -3dB bandwidth
Leakage Current: 100nA maximum specification
Operating Temperature Range: -55°C ~ 125°C
Compliance Standards: ROHS3 Compliant, REACH Unaffected

The CD4051BM96 qualifies as a substitute based on matching core electrical parameters. However, the CD4051BM96 is configured as a single-circuit (1-circuit) device versus the dual-circuit (2-circuit) architecture of the CD4097BM. This represents a functional reduction that must be evaluated against application requirements. The CD4051BM96 offers extended supply voltage flexibility through dual supply capability (±2.5V ~ 9V) and improved product status (Active versus Last Time Buy).

Parameter Comparison

Parameter	CD4097BM	CD4051BM96
Multiplexer/Demultiplexer Circuit	8:1	8:1
Number of Circuits	2	1
On-State Resistance (Max)	240Ohm	240Ohm
Channel-to-Channel Matching (ΔRon)	5Ohm	5Ohm
Voltage - Supply, Single (V+)	3V ~ 18V	3V ~ 20V
Voltage - Supply, Dual (V±)	Not Applicable	±2.5V ~ 9V
-3dB Bandwidth	20MHz	20MHz
Channel Capacitance (CS(off), CD(off))	0.2pF, 35pF	0.2pF, 30pF
Current - Leakage (IS(off)) (Max)	100nA	100nA
Operating Temperature	-55°C ~ 125°C (TA)	-55°C ~ 125°C (TA)
Package / Case	24-SOIC (0.295", 7.50mm Width)	16-SOIC (0.154", 3.90mm Width)
Product Status	Last Time Buy	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

The CD4051BM96 is an active product with continuous manufacturing support and improved long-term availability compared to the Last Time Buy status of the CD4097BM. Both devices maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment.

Selection between these components depends on circuit architecture requirements. Applications requiring dual independent 8:1 multiplexer channels must retain the CD4097BM or implement two CD4051BM96 devices in parallel. Applications requiring only single-channel 8:1 multiplexing benefit from the CD4051BM96 through reduced component count, smaller package footprint (16-SOIC versus 24-SOIC), and active product status ensuring supply continuity.

The CD4051BM96 supports both single and dual supply configurations, providing design flexibility not available in the CD4097BM single-supply architecture. The extended single-supply range (3V ~ 20V versus 3V ~ 18V) offers additional operational margin.

Frequently Asked Questions (FAQ)

Q: Can the CD4051BM96 directly replace the CD4097BM in all applications?

A: Direct replacement is possible only in applications requiring single 8:1 multiplexer functionality. The CD4097BM contains two independent multiplexer circuits; the CD4051BM96 contains one. Applications utilizing both circuits require either dual CD4051BM96 devices or retention of the CD4097BM.

Q: What are the package compatibility considerations?

A: The CD4097BM uses 24-SOIC packaging (0.295" width); the CD4051BM96 uses 16-SOIC packaging (0.154" width). PCB layout modifications are required for substitution. Pin assignments differ between devices and must be verified against schematic requirements.

Q: Are there supply voltage compatibility issues?

A: Both devices support 3V minimum single supply operation. The CD4097BM maximum single supply is 18V; the CD4051BM96 extends to 20V. The CD4051BM96 additionally supports dual supply operation (±2.5V ~ 9V), enabling broader power architecture compatibility.

Q: Do electrical performance characteristics match?

A: Core electrical parameters match: 8:1 multiplexer configuration, 240Ohm on-state resistance, 5Ohm channel matching, 20MHz bandwidth, and 100nA leakage current. Channel capacitance differs slightly (35pF versus 30pF off-state drain capacitance), representing negligible performance variance for most applications.

Q: What is the compliance and availability status difference?

A: Both devices are ROHS3 compliant and REACH unaffected. The CD4097BM is Last Time Buy (discontinued); the CD4051BM96 is Active (current production). The CD4051BM96 offers superior long-term supply assurance and manufacturing support.

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