74VCX162373MTDX Equivalent & Substitute Parts

Part Overview

The 74VCX162373MTDX is a D-Type Transparent Latch 16-bit logic IC manufactured by onsemi, featuring 2 independent 8:8 circuits with tri-state output capability. This component operates across a supply voltage range of 1.4V to 3.6V with a propagation delay of 1ns and is packaged in a 48-TSSOP surface mount configuration. The part is currently in Last Time Buy status, making identification of functionally equivalent alternatives essential for design continuity and long-term component sourcing.

Key Parameters

Parameter	Value
Logic Type	D-Type Transparent Latch
Circuit Configuration	2 Channel 8:8
Output Type	Tri-State
Voltage Supply Range	1.4V ~ 3.6V
Propagation Delay	1ns
Output Current (High/Low)	12mA / 12mA
Operating Temperature	-40°C ~ 85°C
Package Type	48-TFSOP (0.240", 6.10mm Width)
Mounting Type	Surface Mount
RoHS Compliance	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the 74VCX162373MTDX is determined by strict alignment with the following critical parameters:

Primary Substitution Criteria:

Logic Type: D-Type Transparent Latch (mandatory match)
Circuit Configuration: 2 Channel 8:8 (mandatory match)
Output Type: Tri-State (mandatory match)
Package Type: 48-TFSOP or 48-BSSOP (pin-compatible packages)
Operating Temperature Range: -40°C ~ 85°C (mandatory match)
Supply Voltage Compatibility: Substitute must support the 1.4V ~ 3.6V range or overlap significantly

Secondary Compatibility Parameters:

Propagation Delay: 1ns nominal (acceptable range: 1ns to 3.9ns for functional equivalence)
Output Current: 12mA minimum (acceptable range: 12mA to 24mA)
RoHS and REACH Compliance: ROHS3 Compliant and REACH Unaffected

All identified substitute parts meet these criteria and are functionally equivalent for direct replacement in applications requiring D-Type Transparent Latch 16-bit logic with tri-state output.

Parameter Comparison

Part Number	Manufacturer	Series	Supply Voltage	Propagation Delay	Output Current (H/L)	Package	Product Status	RoHS Status
74VCX162373MTDX	onsemi	74VCX	1.4V ~ 3.6V	1ns	12mA / 12mA	48-TFSOP	Last Time Buy	ROHS3 Compliant
74ALVCH162373PAG	IDT	74ALVCH	2.3V ~ 3.6V	1.5ns	12mA / 12mA	48-TFSOP	Active	Not Specified
SN74ALVCH162373DL	Texas Instruments	74ALVCH	1.65V ~ 3.6V	1ns	12mA / 12mA	48-BSSOP	Active	ROHS3 Compliant
SN74ALVCH162373GR	Texas Instruments	74ALVCH	1.65V ~ 3.6V	1ns	12mA / 12mA	48-TFSOP	Active	ROHS3 Compliant
SN74ALVCH162373LR	Texas Instruments	74ALVCH	1.65V ~ 3.6V	1ns	12mA / 12mA	48-BSSOP	Active	ROHS3 Compliant
SN74ALVCH16373DGG	Texas Instruments	74ALVCH	1.65V ~ 3.6V	3.9ns	24mA / 24mA	48-TFSOP	Active	ROHS3 Compliant
SN74ALVCH16373DGGR	Texas Instruments	74ALVCH	1.65V ~ 3.6V	1ns	24mA / 24mA	48-TFSOP	Active	ROHS3 Compliant
SN74ALVCH16373DL	Texas Instruments	74ALVCH	1.65V ~ 3.6V	1ns	24mA / 24mA	48-BSSOP	Active	ROHS3 Compliant
SN74ALVCH16373DLR	Texas Instruments	74ALVCH	1.65V ~ 3.6V	1ns	24mA / 24mA	48-BSSOP	Active	ROHS3 Compliant

Engineering Selection Recommendations

Primary Recommendation: SN74ALVCH162373GR

The SN74ALVCH162373GR from Texas Instruments is the optimal substitute for the 74VCX162373MTDX. This part maintains identical electrical specifications (1ns propagation delay, 12mA output current) while offering extended supply voltage compatibility (1.65V ~ 3.6V). The part is in Active product status with unlimited moisture sensitivity level (MSL 1), ensuring long-term availability and reliability. The 48-TFSOP package matches the original pinout exactly, enabling direct PCB replacement without layout modifications. ROHS3 compliance and REACH Unaffected status align with the original part's regulatory requirements.

Secondary Recommendation: SN74ALVCH162373LR

The SN74ALVCH162373LR provides equivalent electrical performance with identical propagation delay and output current specifications. This part is supplied in Cut Tape and Digi-Reel packaging, offering flexibility for both prototype and production environments. The 48-BSSOP package (0.295", 7.50mm Width) is pin-compatible with the original TFSOP package, though PCB footprint verification is required prior to implementation.

Alternative for Higher Output Current Requirements: SN74ALVCH16373DGGR

For applications requiring higher output current capability, the SN74ALVCH16373DGGR delivers 24mA output current (double the original specification) while maintaining 1ns propagation delay. This part is suitable for designs with increased fan-out or lower impedance load requirements. The 48-TFSOP package ensures direct compatibility with existing PCB layouts.

Consideration: 74ALVCH162373PAG

The 74ALVCH162373PAG from IDT provides functional equivalence with slightly elevated propagation delay (1.5ns versus 1ns). This part is suitable for applications where timing margins accommodate the additional delay. The reduced supply voltage floor (2.3V minimum) may limit applicability in ultra-low-voltage designs requiring operation below 2.3V.

Frequently Asked Questions (FAQ)

Q: Can the 74ALVCH162373PAG be used as a direct replacement for the 74VCX162373MTDX?

A: Yes, the 74ALVCH162373PAG is functionally equivalent for D-Type Transparent Latch 16-bit applications. However, the minimum supply voltage is 2.3V versus 1.4V for the original part. Designs operating below 2.3V require alternative substitutes such as SN74ALVCH162373GR or SN74ALVCH162373LR.

Q: What is the difference between the 48-TFSOP and 48-BSSOP packages?

A: Both packages are pin-compatible with identical pinout and electrical characteristics. The 48-TFSOP has a width of 0.240" (6.10mm), while the 48-BSSOP has a width of 0.295" (7.50mm). PCB footprint dimensions differ; verify landing pattern compatibility before selecting a substitute with a different package designation.

Q: Are all substitute parts ROHS3 compliant?

A: Most substitute parts listed are ROHS3 compliant. The 74ALVCH162373PAG from IDT does not specify RoHS status in the provided data. For applications requiring mandatory ROHS3 compliance, select from Texas Instruments parts (SN74ALVCH162373GR, SN74ALVCH162373LR, SN74ALVCH16373DGGR, SN74ALVCH16373DL, SN74ALVCH16373DLR) or verify IDT compliance documentation independently.

Q: What is the moisture sensitivity level (MSL) difference between the original part and substitutes?

A: The 74VCX162373MTDX has MSL 2 (1 Year shelf life), while all Texas Instruments substitutes have MSL 1 (Unlimited shelf life). MSL 1 parts offer superior moisture resistance and longer storage capability, providing a reliability advantage over the original component.

Q: Can I use SN74ALVCH16373DGGR if my application requires 12mA output current?

A: Yes. The SN74ALVCH16373DGGR provides 24mA output current, which exceeds the 12mA requirement. Higher output current capability is backward compatible with designs requiring lower current. No functional issues arise from using a higher-current-rated component in a lower-current application.

Q: What is the significance of the propagation delay difference between 1ns and 3.9ns?

A: Propagation delay determines the time required for a logic state change at the input to appear at the output. The SN74ALVCH16373DGG has 3.9ns delay versus 1ns for other substitutes. This part is suitable only for applications where timing margins accommodate the additional 2.9ns delay. For time-critical designs, select parts with 1ns or 1.5ns propagation delay.

Q: Are all substitute parts available in the same packaging options as the original?

A: No. The 74VCX162373MTDX is supplied in Tape & Reel (TR) packaging. Substitute parts are available in multiple packaging formats: Bulk (74ALVCH162373PAG), Tube (SN74ALVCH162373DL, SN74ALVCH16373DL), Tape & Reel (SN74ALVCH162373GR, SN74ALVCH16373DGGR, SN74ALVCH16373DLR), and Cut Tape & Digi-Reel (SN74ALVCH162373LR). Select packaging based on production volume and handling requirements.

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