CD4044BD Equivalent & Substitute Parts

Part Overview

The CD4044BD is a quad NAND R/S latch logic integrated circuit manufactured by Texas Instruments, housed in a 16-SOIC surface mount package. This device functions as a 4-channel set-reset latch with tri-state output capability, operating across a wide supply voltage range of 3V to 18V. The CD4044BD is currently discontinued at DiGi Electronics, making equivalent and substitute parts necessary for ongoing design support and production requirements.

Substiute Parts

CD4044BD

Texas InstrumentsIn Stock: 1069CD4044BD Datasheet

Current PartRFQ

CD4044BDR

Texas InstrumentsIn Stock: 2496CD4044BDR Datasheet

DirectRFQ

MC14044BDR2G

onsemiIn Stock: 10712MC14044BDR2G Datasheet

DirectRFQ

MC14044BDG

onsemiIn Stock: 15491MC14044BDG Datasheet

MFR RecommendedRFQ

NLV14044BDR2G

onsemiIn Stock: 3181NLV14044BDR2G Datasheet

MFR RecommendedRFQ

CD4043BD

Texas InstrumentsIn Stock: 2937CD4043BD Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the CD4044BD is determined by strict adherence to the following electrical and mechanical parameters:

Critical Substitution Parameters:

• Logic Type: S-R Latch (4-channel configuration)
• Circuit Configuration: 1:1
• Output Type: Tri-State
• Supply Voltage Range: 3V ~ 18V
• Independent Circuits: 4
• Package / Case: 16-SOIC (0.154", 3.90mm Width)
• Mounting Type: Surface Mount
• Operating Temperature Range: -55°C ~ 125°C

Allowable Variations:

• Propagation Delay Time: Up to 60ns (original specification: 50ns)
• Output Current: Up to 8.8mA (original specification: 6.8mA)
• Packaging Format: Cut Tape (CT), Digi-Reel®, Tube, or Tape & Reel (TR)
• Manufacturer: Texas Instruments or onsemi (both 4000B series compatible)
• Product Status: Active or Discontinued

Parametric Equivalent Category: The CD4043BD is classified as a parametric equivalent due to functional similarity (quad S-R latch, tri-state output, identical electrical specifications) with a different internal logic gate configuration (NOR-based instead of NAND-based).

Parameter Comparison

Engineering Selection Recommendations

Direct Substitutes (Identical Specifications):

CD4044BDR is the primary direct substitute for CD4044BD. Both are Texas Instruments products with identical electrical characteristics (50ns propagation delay, 6.8mA output current). CD4044BDR is currently active in production and available in Cut Tape and Digi-Reel packaging formats, providing continuity for designs requiring the original CD4044BD specifications.

Cross-Manufacturer Substitutes (Allowable Parameter Variations):

MC14044BDR2G, MC14044BDG, and NLV14044BDR2G are onsemi equivalents that meet all critical substitution parameters. These parts operate within the same supply voltage range, maintain 4-channel tri-state latch functionality, and are housed in identical 16-SOIC packages. The allowable variations in propagation delay (60ns versus 50ns) and output current (8.8mA versus 6.8mA) remain within acceptable tolerances for most applications utilizing the 4000B logic series. All three onsemi variants are currently active in production with higher inventory availability.

Parametric Equivalent (Functional Alternative):

CD4043BD functions as a parametric equivalent, offering identical electrical performance and package specifications but with NOR-based logic gate configuration instead of NAND-based. This part is suitable for applications where the internal gate logic does not impact circuit function. CD4043BD is currently discontinued at DiGi Electronics but maintains the same RoHS3 compliance and operating characteristics as the original CD4044BD.

Compliance Considerations:

All substitute parts maintain ROHS3 compliance, MSL Level 1 (Unlimited), and REACH Unaffected status, ensuring regulatory compatibility with the original CD4044BD across all identified applications.

Frequently Asked Questions (FAQ)

Q: Can CD4044BDR be used as a direct replacement for CD4044BD?

A: Yes. CD4044BDR is a direct substitute with identical electrical specifications, supply voltage range, propagation delay, output current, and operating temperature. The primary difference is product status (active versus discontinued) and packaging format availability (Cut Tape/Digi-Reel versus tube).

Q: Are the onsemi parts (MC14044BDR2G, MC14044BDG, NLV14044BDR2G) compatible with CD4044BD?

A: Yes, with allowable parameter variations. All onsemi variants maintain the same logic type (quad S-R latch), tri-state output, supply voltage range (3V ~ 18V), and 16-SOIC package. Propagation delay increases from 50ns to 60ns, and output current increases from 6.8mA to 8.8mA. These variations remain within acceptable tolerances for 4000B series applications.

Q: What is the difference between CD4044BD and CD4043BD?

A: Both are quad S-R latches with tri-state output in 16-SOIC packages and identical electrical specifications. The functional difference is internal gate logic: CD4044BD uses NAND gates, while CD4043BD uses NOR gates. This distinction affects truth table behavior and may impact circuit function depending on application requirements.

Q: Which packaging format should I select?

A: Packaging format (Cut Tape, Digi-Reel, Tube, or Tape & Reel) does not affect electrical performance or compatibility. Selection depends on production volume and assembly equipment compatibility. CD4044BDR offers Cut Tape and Digi-Reel options; MC14044BDG is available in Tube format; NLV14044BDR2G is supplied in Tape & Reel format.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All identified substitute parts (CD4044BDR, MC14044BDR2G, MC14044BDG, NLV14044BDR2G, and CD4043BD) maintain ROHS3 compliance and MSL Level 1 (Unlimited) rating, ensuring regulatory compatibility with the original CD4044BD.

Q: What is the inventory status of substitute parts?

A: CD4044BDR (2,481 units), MC14044BDR2G (10,639 units), MC14044BDG (15,435 units), and NLV14044BDR2G (3,124 units) are all currently in active production with available inventory. CD4043BD (2,917 units) is discontinued but remains in stock.