SN74HC11DBR Equivalent & Substitute Parts

Part Overview

The SN74HC11DBR is a 3-channel AND gate logic IC manufactured by Texas Instruments in 14-SSOP surface mount packaging. This device implements three independent 3-input AND gates on a single chip, operating across a 2V to 6V supply voltage range with a maximum propagation delay of 17ns at 6V with 50pF load.

The SN74HC11DBR is classified as obsolete. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support ongoing production or maintenance requirements for systems utilizing this logic gate configuration.

Substiute Parts

SN74HC11DBR

Texas InstrumentsIn Stock: 968SN74HC11DBR Datasheet

Current PartRFQ

SN74HC112DR

Texas InstrumentsIn Stock: 2302SN74HC112DR Datasheet

MFR RecommendedRFQ

74HC11PW,118

Nexperia USA Inc.In Stock: 773674HC11PW,118 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SN74HC11DBR are identified based on functional equivalence within the 74HC logic family. The critical parameters determining substitutability are:

• Logic Type: AND Gate (3-channel, 3-input configuration)
• Voltage Supply Range: 2V ~ 6V
• Current Output Specifications: 5.2mA high and low
• Input Logic Levels: 0.5V ~ 1.8V (low), 1.5V ~ 4.2V (high)
• Propagation Delay: 17ns @ 6V, 50pF
• Operating Temperature Range: -40°C minimum to 85°C minimum
• Surface Mount Packaging: 14-pin configurations (SSOP or TSSOP variants)
• Compliance: ROHS3 and MSL Level 1

The substitute 74HC11PW,118 maintains identical functional specifications and electrical parameters as the main part. The SN74HC112DR, while from the same 74HC family, implements a different logic function (JK flip-flop) and is not a direct functional equivalent for AND gate applications.

Parameter Comparison

Engineering Selection Recommendations

The 74HC11PW,118 manufactured by Nexperia USA Inc. is the primary substitute for the obsolete SN74HC11DBR. Both parts maintain identical functional specifications for 3-channel, 3-input AND gate logic, matching all critical electrical parameters including supply voltage, quiescent current, output current, input logic levels, and propagation delay.

The 74HC11PW,118 offers an extended operating temperature range (-40°C to 125°C versus -40°C to 85°C), providing additional thermal margin in applications requiring higher temperature operation. The package footprint differs slightly (14-TSSOP versus 14-SSOP), requiring PCB layout verification for pin-to-pin compatibility and mechanical fit.

Both parts maintain ROHS3 compliance and MSL Level 1 rating, ensuring compatibility with standard manufacturing and storage requirements.

The SN74HC112DR is not recommended as a substitute due to functional incompatibility. This device implements JK flip-flop logic rather than AND gate logic, making it unsuitable for direct replacement in circuits designed for combinational AND gate operation.

Frequently Asked Questions (FAQ)

Q: Can the 74HC11PW,118 directly replace the SN74HC11DBR in existing designs?

A: The 74HC11PW,118 provides functional equivalence for AND gate logic operation. However, the package footprint differs between 14-SSOP and 14-TSSOP variants. PCB layout and mechanical clearance must be evaluated before implementation. Pin assignments remain compatible for the 14-pin configuration.

Q: What is the significance of the extended operating temperature range in the 74HC11PW,118?

A: The 74HC11PW,118 operates to 125°C maximum, compared to 85°C for the SN74HC11DBR. This extended range provides additional thermal margin for applications in elevated ambient temperature environments or high-power dissipation scenarios. Applications limited to 85°C operation are unaffected by this specification difference.

Q: Why is the SN74HC112DR listed but not recommended as a substitute?

A: The SN74HC112DR implements JK flip-flop logic (sequential logic function) rather than AND gate logic (combinational logic function). While both devices are from the 74HC family and share similar electrical characteristics, they perform fundamentally different logic operations. Direct substitution would result in circuit malfunction.

Q: Are there packaging considerations when switching from SN74HC11DBR to 74HC11PW,118?

A: Yes. The SN74HC11DBR uses 14-SSOP packaging (0.209" width), while the 74HC11PW,118 uses 14-TSSOP packaging (0.173" width). The TSSOP variant is narrower. PCB footprint libraries, solder paste stencil apertures, and pick-and-place machine programming must be updated accordingly. Pin pitch and lead count remain identical at 14 pins.

Q: Do both parts meet the same compliance and reliability standards?

A: Both the SN74HC11DBR and 74HC11PW,118 are ROHS3 compliant and carry MSL Level 1 (unlimited moisture sensitivity level) ratings. Both are EAR99 classified and REACH unaffected. Compliance profiles are equivalent for standard manufacturing and supply chain applications.