74VCX16841MTD Equivalent & Substitute Parts

Part Overview

The 74VCX16841MTD is a D-Type Transparent Latch IC manufactured by onsemi, featuring 2 independent channels with 10:10 circuit configuration and tri-state output capability. This component is classified as obsolete, making identification of suitable substitute parts essential for ongoing design support and production continuity. The part operates across a 1.4V to 3.6V supply voltage range with 1ns propagation delay and is packaged in a 56-TFSOP surface mount configuration.

Key Parameters

Parameter	Value
Logic Type	D-Type Transparent Latch
Circuit Configuration	10:10 (2 Independent Channels)
Output Type	Tri-State
Voltage - Supply	1.4V ~ 3.6V
Delay Time - Propagation	1ns
Current - Output High, Low	24mA, 24mA
Operating Temperature	-40°C ~ 85°C
Mounting Type	Surface Mount
Package / Case	56-TFSOP (0.240", 6.10mm Width)
Moisture Sensitivity Level (MSL)	2 (1 Year)

Substitute Part Grouping Explanation

Substitution of the 74VCX16841MTD is determined by the following critical parameters:

Functional Equivalence: All substitute parts maintain identical logic type (D-Type Transparent Latch), circuit configuration (10:10), output type (tri-state), and propagation delay (1ns).

Voltage Compatibility: Substitute parts operate at 1.65V ~ 3.6V, which overlaps the upper range of the original part's 1.4V ~ 3.6V specification. This represents a narrower lower voltage boundary in the substitute parts.

Output Current Capability: Substitutes are grouped by output current ratings: 12mA (SN74ALVCH162841DL, SN74ALVCH162841GR) and 24mA (SN74ALVCH16841DGGR, SN74ALVCH16841DL, SN74ALVCH16841DLR), matching the original part's 24mA capability where applicable.

Package Variants: Substitutes are available in two package types: 56-BSSOP (0.295", 7.50mm Width) and 56-TFSOP (0.240", 6.10mm Width), with the latter matching the original part's footprint.

Product Status: All Texas Instruments substitutes are active products, providing long-term availability compared to the obsolete onsemi original.

Parameter Comparison

Parameter	74VCX16841MTD (onsemi)	SN74ALVCH162841DL (TI)	SN74ALVCH162841GR (TI)	SN74ALVCH16841DGGR (TI)	SN74ALVCH16841DL (TI)	SN74ALVCH16841DLR (TI)
Logic Type	D-Type Transparent Latch	D-Type Transparent Latch	D-Type Transparent Latch	D-Type Transparent Latch	D-Type Transparent Latch	D-Type Transparent Latch
Circuit Configuration	10:10	10:10	10:10	10:10	10:10	10:10
Output Type	Tri-State	Tri-State	Tri-State	Tri-State	Tri-State	Tri-State
Voltage - Supply	1.4V ~ 3.6V	1.65V ~ 3.6V	1.65V ~ 3.6V	1.65V ~ 3.6V	1.65V ~ 3.6V	1.65V ~ 3.6V
Delay Time - Propagation	1ns	1ns	1ns	1ns	1ns	1ns
Current - Output High, Low	24mA, 24mA	12mA, 12mA	12mA, 12mA	24mA, 24mA	24mA, 24mA	24mA, 24mA
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	56-TFSOP	56-BSSOP	56-TFSOP	56-TFSOP	56-BSSOP	56-BSSOP
Product Status	Obsolete	Active	Active	Active	Active	Active
RoHS Status	Not specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	2 (1 Year)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

For Direct Footprint Replacement (56-TFSOP Package):

SN74ALVCH162841GR and SN74ALVCH16841DGGR are direct footprint matches to the 74VCX16841MTD. SN74ALVCH16841DGGR maintains identical 24mA output current capability, making it the closest functional equivalent. SN74ALVCH162841GR operates at reduced output current (12mA) and should be selected only if circuit design accommodates lower drive capability.

For Reduced Package Footprint (56-BSSOP Package):

SN74ALVCH16841DL and SN74ALVCH16841DLR provide 24mA output current matching the original part but require PCB layout modification due to the wider 56-BSSOP package (0.295" vs. 0.240"). SN74ALVCH162841DL operates at 12mA output current with the same package consideration.

Compliance and Availability:

All Texas Instruments substitutes are ROHS3 compliant and carry active product status, ensuring long-term supply chain stability. The improved MSL rating (1 vs. 2) provides extended shelf life and reduced moisture-related handling requirements.

Voltage Margin Consideration:

Applications operating below 1.65V supply voltage cannot use any listed substitute parts. The original 74VCX16841MTD supports operation down to 1.4V; substitute parts establish a 1.65V minimum threshold.

Frequently Asked Questions (FAQ)

Q: Can SN74ALVCH162841 series parts directly replace the 74VCX16841MTD?

A: SN74ALVCH162841GR provides direct footprint compatibility (56-TFSOP) and functional equivalence. However, output current is reduced to 12mA compared to the original 24mA specification. Verify circuit load requirements before selection.

Q: What is the difference between 56-TFSOP and 56-BSSOP packages?

A: Both are 56-pin surface mount packages with different body widths. 56-TFSOP measures 0.240" (6.10mm) width, matching the original part. 56-BSSOP measures 0.295" (7.50mm) width and requires PCB layout modification. Pin pitch and electrical function remain identical.

Q: Are all substitute parts RoHS compliant?

A: Yes. All Texas Instruments substitutes (SN74ALVCH series) are ROHS3 compliant. The original 74VCX16841MTD RoHS status is not specified in available documentation.

Q: What is the minimum supply voltage for substitute parts?

A: All Texas Instruments substitutes operate at 1.65V ~ 3.6V. Applications requiring operation below 1.65V cannot use these parts. The original 74VCX16841MTD supports 1.4V ~ 3.6V operation.

Q: Which substitute provides the best output current match?

A: SN74ALVCH16841DGGR, SN74ALVCH16841DL, and SN74ALVCH16841DLR all provide 24mA output current matching the original part. SN74ALVCH16841DGGR is recommended for direct footprint replacement (56-TFSOP package).

Q: How do packaging options affect component selection?

A: SN74ALVCH162841GR and SN74ALVCH16841DGGR maintain the original 56-TFSOP footprint, requiring no PCB modification. SN74ALVCH16841DL, SN74ALVCH16841DLR, and SN74ALVCH162841DL use 56-BSSOP packaging and require PCB layout changes. Packaging selection depends on available board space and design flexibility.

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