74HC377D,652 Equivalent & Substitute Parts

Part Overview

The 74HC377D,652 is a D-Type flip-flop logic integrated circuit manufactured by Nexperia USA Inc., featuring 1 element with 8-bit capacity and positive edge triggering. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. The part operates across a 2V to 6V supply range with a maximum propagation delay of 27ns at 6V with 50pF load, suitable for standard logic applications requiring edge-triggered data capture.

Substiute Parts

74HC377D,652

Nexperia USA Inc.In Stock: 114874HC377D,652 Datasheet

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CD74HC377M

Harris CorporationIn Stock: 7963CD74HC377M Datasheet

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CD74HC377M96

Texas InstrumentsIn Stock: 5106CD74HC377M96 Datasheet

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MC74HC377ADWR2G

onsemiIn Stock: 2169MC74HC377ADWR2G Datasheet

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SN74HC377DWR

Texas InstrumentsIn Stock: 3619SN74HC377DWR Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 74HC377D,652 are qualified based on the following critical parameters that determine functional and mechanical compatibility:

Core Compatibility Criteria:

• Base product number: 74HC377 (ensures identical logic function and pinout)
• Package type: 20-SOIC (0.295", 7.50mm Width) (ensures PCB footprint compatibility)
• Function: Standard D-Type flip-flop with 1 element, 8-bit configuration
• Trigger type: Positive edge
• Output type: Non-inverted
• Voltage supply range: 2V ~ 6V minimum overlap
• Current output specifications: 5.2mA high and low (standard for 74HC logic)

Acceptable Parameter Variations:

• Clock frequency may differ (35 MHz to 83 MHz range acceptable for standard logic applications)
• Propagation delay may vary within the 27ns to 30ns range at specified conditions
• Operating temperature range may extend beyond the original specification
• Quiescent current may vary (4 µA to 8 µA)
• Input capacitance may vary (3 pF to 10 pF)

All substitute parts listed maintain the 74HC series designation and 20-SOIC package, ensuring direct functional and mechanical replacement capability.

Parameter Comparison

Engineering Selection Recommendations

For Active Product Status Requirement: CD74HC377M96 (Texas Instruments) and SN74HC377DWR (Texas Instruments) maintain active product status, ensuring long-term availability and manufacturer support. These parts are recommended for new designs or applications requiring extended component lifecycle assurance.

For RoHS3 Compliance Requirement: CD74HC377M96, MC74HC377ADWR2G, and SN74HC377DWR all meet ROHS3 compliance standards. CD74HC377M does not meet RoHS compliance and should be avoided in applications with regulatory compliance mandates.

For Extended Temperature Range: CD74HC377M, CD74HC377M96, and MC74HC377ADWR2G support -55°C to 125°C operating range, exceeding the original 74HC377D,652 specification of -40°C to 125°C. SN74HC377DWR operates within -40°C to 85°C, which is narrower than the original part.

For Moisture Sensitivity: 74HC377D,652, CD74HC377M96, and SN74HC377DWR all carry MSL Level 1 (Unlimited), indicating minimal moisture sensitivity. MC74HC377ADWR2G carries MSL Level 3 (168 Hours), requiring controlled storage conditions.

For Propagation Delay Performance: 74HC377D,652, MC74HC377ADWR2G, and SN74HC377DWR all specify 27ns maximum propagation delay at 6V with 50pF load. CD74HC377M and CD74HC377M96 specify 30ns, acceptable for most standard logic applications with less stringent timing requirements.

Frequently Asked Questions (FAQ)

Q: Can I use CD74HC377M as a direct replacement for 74HC377D,652? A: CD74HC377M is functionally compatible and shares the identical 20-SOIC package and 74HC377 base product number. However, it does not meet RoHS3 compliance and carries obsolete product status. Use only if RoHS compliance is not required and long-term availability is not a concern.

Q: Which substitute part offers the best long-term availability? A: CD74HC377M96 and SN74HC377DWR both carry active product status from Texas Instruments, ensuring ongoing manufacturing and supply chain support. CD74HC377M96 is available in Tape & Reel packaging for high-volume applications.

Q: Are there temperature range differences I should consider? A: SN74HC377DWR operates only to 85°C maximum, which is 40°C lower than the original 74HC377D,652 specification of 125°C. For applications requiring full -40°C to 125°C range, use CD74HC377M96, CD74HC377M, or MC74HC377ADWR2G instead.

Q: What is the difference in quiescent current between substitute parts? A: MC74HC377ADWR2G specifies 4 µA quiescent current, which is half that of the original part (8 µA) and other substitutes. This lower current consumption may be beneficial for battery-powered or low-power applications, though the difference is negligible in most standard logic circuits.

Q: Does packaging type affect substitution compatibility? A: All substitute parts use the identical 20-SOIC (0.295", 7.50mm Width) package, ensuring PCB footprint compatibility. Packaging format (Tube, Tape & Reel, Cut Tape) affects procurement and handling but not electrical or mechanical compatibility.

Q: Can I use SN74HC377DWR if my application requires -55°C operation? A: No. SN74HC377DWR operates only to -40°C minimum. For -55°C operation, use CD74HC377M96, CD74HC377M, or MC74HC377ADWR2G, which all support -55°C to 125°C range.

Q: What is the significance of input capacitance variation between parts? A: Input capacitance ranges from 3 pF to 10 pF across substitute parts. This variation affects circuit loading and timing in high-frequency applications. For timing-critical designs, verify that the selected substitute's input capacitance is acceptable for your specific circuit topology.