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BU4066BCF-E2 Equivalent & Substitute Parts
Part Overview
The BU4066BCF-E2 is a 4-circuit IC switch manufactured by Rohm Semiconductor, configured as SPST-NO (Single Pole Single Throw - Normally Open) with 280Ohm on-state resistance. This component operates across a supply voltage range of 3V to 18V and is housed in a 14-SOP surface mount package. The part is currently in active production status with 18,515 units in stock.
Substitute parts become necessary when the BU4066BCF-E2 reaches end-of-life status, when alternative packaging formats are required for manufacturing processes, or when supply chain constraints necessitate equivalent alternatives that meet the same electrical and mechanical specifications.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | BU4066BCF-E2 |
| Manufacturer | Rohm Semiconductor |
| Category | Interface |
| Switch Circuit Type | SPST - NO |
| Number of Circuits | 4 |
| Multiplexer/Demultiplexer Circuit | 1:1 |
| On-State Resistance (Max) | 280Ohm |
| Voltage - Supply, Single (V+) | 3V ~ 18V |
| Channel Capacitance (CS(off), CD(off)) | 10pF |
| Current - Leakage (IS(off)) (Max) | 300nA |
| Crosstalk | -50dB @ 1MHz |
| Operating Temperature | -40°C ~ 85°C (TA) |
| Mounting Type | Surface Mount |
| Package / Case | 14-SOIC (0.173", 4.40mm Width) |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
| Product Status | Active |
Substitute Part Grouping Explanation
Substitution eligibility for the BU4066BCF-E2 is determined by the following critical parameters:
- Circuit Configuration: 4 independent circuits with 1:1 multiplexer/demultiplexer topology
- Voltage Supply Range: 3V to 18V single supply operation
- On-State Resistance: Maximum 280Ohm
- Package Type: 14-SOIC surface mount configuration
- Operating Temperature Range: Minimum -40°C to 85°C coverage
- Leakage Current: Maximum 300nA specification
- Channel Capacitance: 10pF maximum
- Crosstalk Performance: -50dB @ 1MHz minimum
The substitute parts identified (CD4016BM, CD4016BM96, CD4016BMT) are bilateral FET switches manufactured by Texas Instruments. While these parts operate as bilateral switches rather than unidirectional SPST-NO switches, they maintain functional equivalence through their 4-circuit configuration, 1:1 circuit topology, identical voltage supply range (3V to 18V), and compatible 14-SOIC package footprint. All substitute parts meet or exceed the leakage current and capacitance specifications of the main part.
Parameter Comparison
| Parameter | BU4066BCF-E2 | CD4016BM | CD4016BM96 | CD4016BMT |
|---|---|---|---|---|
| Manufacturer | Rohm Semiconductor | Texas Instruments | Texas Instruments | Texas Instruments |
| Category | Interface | Logic | Logic | Logic |
| Circuit Type | SPST - NO | Bilateral, FET Switches | Bilateral, FET Switches | Bilateral, FET Switches |
| Independent Circuits | 4 | 4 | 4 | 4 |
| Circuit Topology | 1:1 | 1 x 1:1 | 1 x 1:1 | 1 x 1:1 |
| Voltage - Supply | 3V ~ 18V | 3V ~ 18V | 3V ~ 18V | 3V ~ 18V |
| Operating Temperature | -40°C ~ 85°C | -55°C ~ 125°C | -55°C ~ 125°C | -55°C ~ 125°C |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount | Surface Mount |
| Package / Case | 14-SOIC (0.173", 4.40mm Width) | 14-SOIC (0.154", 3.90mm Width) | 14-SOIC (0.154", 3.90mm Width) | 14-SOIC (0.154", 3.90mm Width) |
| Packaging Format | Tape & Reel (TR) | Tube | Cut Tape (CT) & Digi-Reel® | Tape & Reel (TR) |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) |
| Product Status | Active | Last Time Buy | Active | Last Time Buy |
| Inventory Availability | 18,515 Pcs | 1,873 Pcs | 30,877 Pcs | 2,480 Pcs |
Engineering Selection Recommendations
CD4016BM96 is the primary substitute recommendation based on the following criteria:
- Active product status ensures continued availability and manufacturing support
- Highest inventory level (30,877 units) provides supply chain reliability
- Cut Tape and Digi-Reel packaging options accommodate flexible procurement workflows
- Operating temperature range (-55°C to 125°C) exceeds the BU4066BCF-E2 specification, providing thermal margin
- ROHS3 compliance and MSL 1 rating match the original part's environmental certifications
CD4016BMT serves as a secondary substitute when Tape & Reel packaging is specifically required to match existing assembly processes. However, this variant carries Last Time Buy status, indicating limited future availability.
CD4016BM is not recommended for new designs due to Last Time Buy status and lower inventory levels, though it remains functionally equivalent for legacy system maintenance.
Package footprint differences exist between the BU4066BCF-E2 (0.173" width) and CD4016 variants (0.154" width). PCB layout verification is necessary to confirm mechanical compatibility within existing designs.
Frequently Asked Questions (FAQ)
Q: Can CD4016BM96 directly replace BU4066BCF-E2 in existing designs?
A: Electrical substitution is valid based on matching circuit configuration, voltage supply range, and operating temperature coverage. Mechanical verification of the 14-SOIC package footprint difference (0.173" vs 0.154" width) is required before PCB implementation.
Q: What is the functional difference between SPST-NO and bilateral FET switches?
A: The BU4066BCF-E2 operates as a unidirectional switch (SPST-NO), while CD4016 variants function as bilateral switches allowing signal flow in both directions. For applications requiring unidirectional switching only, bilateral operation does not create functional incompatibility; the switch simply provides additional capability.
Q: Why do the CD4016 variants have a wider operating temperature range?
A: The CD4016 series is specified for -55°C to 125°C operation, exceeding the BU4066BCF-E2 range of -40°C to 85°C. This extended specification reflects Texas Instruments' design margins and does not indicate performance differences within the BU4066BCF-E2 operating window.
Q: Which substitute part should be selected for new production?
A: CD4016BM96 is the recommended choice for new designs due to active product status and superior inventory availability. This ensures long-term supply chain stability and manufacturing support.
Q: Are packaging format differences significant for substitution?
A: Packaging format (Tube, Cut Tape, Tape & Reel) affects procurement and assembly processes but does not impact electrical performance. Selection should align with existing manufacturing workflows and inventory management systems.
Q: Do all substitute parts meet the same compliance standards?
A: Yes. All identified substitutes (CD4016BM, CD4016BM96, CD4016BMT) carry ROHS3 compliance and MSL 1 ratings identical to the BU4066BCF-E2, ensuring equivalent environmental and regulatory compliance.
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