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CD4051BEE4 Equivalent & Substitute Parts
Part Overview
The CD4051BEE4 is an 8:1 multiplexer/demultiplexer interface IC manufactured by Texas Instruments in 16-DIP packaging. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The CD4051BEE4 provides single-circuit switching functionality with 240Ohm on-state resistance, suitable for analog signal routing and selection applications across industrial and commercial temperature ranges.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Multiplexer/Demultiplexer Circuit | 8:1 |
| Number of Circuits | 1 |
| On-State Resistance (Max) | 240Ohm |
| Channel-to-Channel Matching (ΔRon) | 5Ohm |
| Voltage - Supply, Single (V+) | 3V ~ 20V |
| Voltage - Supply, Dual (V±) | ±2.5V ~ 9V |
| -3dB Bandwidth | 20MHz |
| Channel Capacitance (CS(off), CD(off)) | 0.2pF, 30pF |
| Current - Leakage (IS(off)) (Max) | 100nA |
| Operating Temperature | -55°C ~ 125°C (TA) |
| Package / Case | 16-DIP (0.300", 7.62mm) |
| RoHS Status | ROHS3 Compliant |
Substitute Part Grouping Explanation
Substitution for the CD4051BEE4 is determined by the following critical parameters:
- Circuit Configuration: 8:1 multiplexer/demultiplexer topology with single circuit
- Packaging: 16-DIP form factor for through-hole mounting compatibility
- Supply Voltage Range: Compatibility with 3V ~ 20V single supply or ±2.5V ~ 9V dual supply operation
- On-State Resistance: Maximum 240Ohm specification for signal path impedance
- Operating Temperature: -55°C ~ 125°C range for industrial applications
- Compliance: ROHS3 compliance and REACH unaffected status
Two substitute parts meet these core substitution criteria:
CD4051BE (Texas Instruments): Direct equivalent with identical electrical specifications and active product status, providing improved procurement availability.
MAX4558EPE+ (Analog Devices Inc./Maxim Integrated): Functional substitute with enhanced performance characteristics in on-state resistance, leakage current, and switching speed, though with narrower operating temperature and supply voltage ranges.
Parameter Comparison
| Parameter | CD4051BEE4 (Main) | CD4051BE (Substitute) | MAX4558EPE+ (Substitute) |
|---|---|---|---|
| Manufacturer | Texas Instruments | Texas Instruments | Analog Devices Inc./Maxim Integrated |
| Product Status | Obsolete | Active | Active |
| Multiplexer/Demultiplexer Circuit | 8:1 | 8:1 | 8:1 |
| Number of Circuits | 1 | 1 | 1 |
| On-State Resistance (Max) | 240Ohm | 240Ohm | 160Ohm |
| Channel-to-Channel Matching (ΔRon) | 5Ohm | 5Ohm | 2Ohm |
| Voltage - Supply, Single (V+) | 3V ~ 20V | 3V ~ 20V | 2V ~ 12V |
| Voltage - Supply, Dual (V±) | ±2.5V ~ 9V | ±2.5V ~ 9V | ±2V ~ 6V |
| -3dB Bandwidth | 20MHz | 20MHz | Not specified |
| Channel Capacitance (CS(off), CD(off)) | 0.2pF, 30pF | 0.2pF, 30pF | 2.5pF, 10pF |
| Current - Leakage (IS(off)) (Max) | 100nA | 100nA | 1nA |
| Operating Temperature | -55°C ~ 125°C (TA) | -55°C ~ 125°C (TA) | -40°C ~ 85°C (TA) |
| Package / Case | 16-DIP (0.300", 7.62mm) | 16-DIP (0.300", 7.62mm) | 16-DIP (0.300", 7.62mm) |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
Engineering Selection Recommendations
CD4051BE is the primary substitute for direct replacement applications. As an active product from Texas Instruments with identical electrical specifications, supply voltage ranges, and operating temperature range, it provides pin-for-pin compatibility with no design modifications required. This part maintains full compliance with ROHS3 and REACH requirements.
MAX4558EPE+ is suitable for applications where improved performance characteristics are beneficial. The lower on-state resistance (160Ohm vs. 240Ohm), superior channel matching (2Ohm vs. 5Ohm), reduced leakage current (1nA vs. 100nA), and faster switching times (150ns/120ns) offer performance advantages. However, this substitute requires design verification for applications operating above 85°C ambient temperature or requiring supply voltages exceeding ±6V dual supply or 12V single supply, as the MAX4558EPE+ has narrower operating ranges than the original part.
Frequently Asked Questions (FAQ)
Q: Can CD4051BE be used as a direct replacement for CD4051BEE4?
A: Yes. CD4051BE is a direct equivalent with identical electrical specifications, supply voltage ranges, operating temperature range, and 16-DIP packaging. No circuit modifications are required.
Q: What are the key differences between CD4051BE and MAX4558EPE+?
A: Both are 8:1 multiplexer/demultiplexer ICs in 16-DIP packaging. CD4051BE matches the original specifications exactly. MAX4558EPE+ offers lower on-state resistance (160Ohm vs. 240Ohm), better channel matching (2Ohm vs. 5Ohm), and lower leakage current (1nA vs. 100nA), but operates at narrower temperature (-40°C to 85°C) and supply voltage ranges (2V ~ 12V single, ±2V ~ 6V dual).
Q: Is MAX4558EPE+ compatible with designs requiring -55°C operation?
A: No. MAX4558EPE+ operates from -40°C to 85°C, which does not meet the -55°C minimum temperature requirement of the original CD4051BEE4. CD4051BE must be used for applications requiring extended low-temperature operation.
Q: Are both substitute parts available in the same packaging?
A: Yes. Both CD4051BE and MAX4558EPE+ are supplied in 16-DIP (0.300", 7.62mm) through-hole packaging, matching the original CD4051BEE4 form factor.
Q: Do the substitute parts maintain RoHS3 compliance?
A: Yes. Both CD4051BE and MAX4558EPE+ are ROHS3 compliant and REACH unaffected, matching the compliance status of the original part.
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