BU4093B NAND Gate IC Equivalent & Substitute Parts

Part Overview

The BU4093B is a 4-channel NAND gate IC with Schmitt trigger inputs manufactured by Rohm Semiconductor in the 4000B logic series. This component is classified as obsolete, which necessitates identification of active equivalent parts for ongoing design support and procurement. The BU4093B operates across a 3V to 16V supply range and is packaged in a 14-DIP through-hole configuration, making it suitable for legacy circuit applications requiring NAND logic functionality with hysteresis input characteristics.

Substiute Parts

BU4093B

Rohm SemiconductorIn Stock: 1063BU4093B Datasheet

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CD4093BE

Texas InstrumentsIn Stock: 10127CD4093BE Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the BU4093B is determined by strict equivalence across the following critical parameters:

Functional Equivalence: Logic type (NAND Gate), number of circuits (4), number of inputs per circuit (2), and Schmitt trigger feature presence.

Electrical Compatibility: Supply voltage range must encompass or exceed the original specification (3V ~ 16V). Quiescent current, output current ratings, and propagation delay characteristics must be within acceptable operational limits for the target application.

Physical Compatibility: Package type must be 14-DIP through-hole configuration to ensure direct board-level substitution without layout modification.

Compliance Requirements: RoHS3 compliance and REACH unaffected status ensure regulatory alignment with modern procurement standards.

The CD4093BE from Texas Instruments meets all substitution criteria as a functionally equivalent NAND gate IC with Schmitt trigger inputs in the identical 14-DIP package.

Parameter Comparison

Engineering Selection Recommendations

The CD4093BE is a direct functional substitute for the BU4093B based on product status and compliance alignment. The BU4093B is obsolete, while the CD4093BE maintains active production status, ensuring long-term availability and supply chain continuity. Both components are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements.

The CD4093BE provides an extended supply voltage range (3V ~ 18V versus 3V ~ 16V) and broader operating temperature range (-55°C ~ 125°C versus -40°C ~ 85°C), offering enhanced operational flexibility. Output current ratings are marginally higher (3.4mA versus 3mA), providing improved drive capability. The propagation delay specification of the CD4093BE (130ns at 15V, 50pF) is slower than the BU4093B (40ns), which must be evaluated against specific timing requirements in the target application.

Both components are packaged identically in 14-DIP through-hole format, enabling direct board-level substitution without PCB redesign.

Frequently Asked Questions (FAQ)

Q: Can the CD4093BE directly replace the BU4093B without circuit modification?

A: Yes, the CD4093BE is a direct pin-compatible substitute in the 14-DIP package. No circuit modification is required for functional substitution. However, the propagation delay difference (130ns versus 40ns) must be evaluated against application timing constraints.

Q: What is the primary reason for substituting the BU4093B?

A: The BU4093B is classified as obsolete. The CD4093BE is an active product from Texas Instruments, ensuring reliable procurement and long-term supply availability.

Q: Are there any electrical parameter differences that affect circuit operation?

A: The CD4093BE has a wider supply voltage range (3V ~ 18V) and extended operating temperature range (-55°C ~ 125°C). Output current ratings are slightly higher (3.4mA versus 3mA). The most significant difference is propagation delay: the CD4093BE operates at 130ns compared to the BU4093B at 40ns under identical test conditions. Applications with strict timing requirements must account for this difference.

Q: Do both parts meet current regulatory compliance standards?

A: Yes, both the BU4093B and CD4093BE are ROHS3 compliant and REACH unaffected, meeting modern procurement and environmental regulations.

Q: Is the packaging identical between these two parts?

A: Yes, both components use 14-DIP (0.300", 7.62mm) through-hole packaging, enabling direct board-level substitution without layout changes.

Q: What is the quiescent current specification for both parts?

A: Both the BU4093B and CD4093BE have identical quiescent current specifications of 4 µA maximum, ensuring equivalent power consumption characteristics in standby operation.