PI74VCX16373AE Equivalent & Substitute Parts

Part Overview

The PI74VCX16373AE is a 16-bit D-type transparent latch manufactured by Diodes Incorporated, housed in a 48-TSSOP package. This component functions as a 2-channel, 8:8 circuit with tri-state output capability, operating across a supply voltage range of 1.8V to 3.6V. The part is classified as obsolete, necessitating identification of active equivalent alternatives that maintain functional and electrical compatibility for new designs and production continuity.

Key Parameters

Parameter	Value
Logic Type	D-Type Transparent Latch
Circuit Configuration	2 Channel 8:8
Output Type	Tri-State
Supply Voltage Range	1.8V ~ 3.6V
Propagation Delay	1.5ns
Output Current (High/Low)	6mA / 6mA
Operating Temperature	-40°C ~ 85°C
Package Type	48-TFSOP (0.240", 6.10mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the PI74VCX16373AE is determined by strict equivalence across the following critical parameters:

Logic Function: D-type transparent latch with 2-channel, 8:8 circuit configuration
Output Architecture: Tri-state output capability
Package Compatibility: 48-pin TFSOP or SSOP package (0.240" or 0.295" width variants)
Electrical Specifications: Supply voltage range, propagation delay, and output current drive capability
Environmental Compliance: RoHS3 compliance and operating temperature range (-40°C to 85°C)
Product Status: Active status preferred for long-term availability

Substitute parts are grouped into two categories based on package variant: 48-TFSOP (0.240" width) and 48-SSOP/BSSOP (0.295" width). Both package types are electrically equivalent and mechanically compatible with standard PCB layouts designed for either footprint.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Series	Supply Voltage	Propagation Delay	Output Current (High/Low)	Package Type	Product Status	RoHS Status
PI74VCX16373AE	Diodes Incorporated	74VCX	1.8V ~ 3.6V	1.5ns	6mA / 6mA	48-TFSOP	Obsolete	ROHS3 Compliant
74ALVCH162373PAG	IDT	74ALVCH	2.3V ~ 3.6V	1.5ns	12mA / 12mA	48-TFSOP	Active	Not specified
74VCX162373MTDX	Fairchild Semiconductor	74VCX	1.4V ~ 3.6V	1ns	12mA / 12mA	48-TFSOP	Active	Not specified
74VCX16373MTDX	Fairchild Semiconductor	74VCX	1.2V ~ 3.6V	1.5ns	24mA / 24mA	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

Engineering Selection Recommendations

All listed substitute parts maintain functional equivalence to the PI74VCX16373AE across the D-type transparent latch 2-channel 8:8 configuration with tri-state output. Selection criteria are based on product status, compliance certifications, and supply voltage compatibility.

Primary Selection Criteria:

Parts with active product status are preferred for new designs and ongoing production. The SN74ALVCH162373GR and SN74ALVCH16373DGGR from Texas Instruments offer active status, ROHS3 compliance, and 48-TFSOP package compatibility matching the original footprint. These parts support the full operating temperature range of -40°C to 85°C.

For applications requiring extended supply voltage range below 1.65V, the 74VCX162373MTDX from Fairchild Semiconductor operates from 1.4V, providing broader low-voltage compatibility. The 74VCX16373MTDX extends operation to 1.2V minimum supply voltage.

Parts specified in 48-BSSOP (0.295" width) package, including SN74ALVCH162373DL and SN74ALVCH162373LR, are mechanically compatible with designs using the wider SSOP footprint variant.

Output current drive capability varies across substitutes. The PI74VCX16373AE provides 6mA output current. Substitutes offering 12mA or 24mA output current provide enhanced drive capability suitable for higher fan-out applications.

Frequently Asked Questions (FAQ)

Q: Can I directly replace PI74VCX16373AE with any of the listed substitutes?

A: Direct replacement depends on package footprint compatibility. Parts specified in 48-TFSOP (0.240" width) are pin-compatible with the original. Parts in 48-BSSOP (0.295" width) require PCB layout adjustment. All listed parts maintain functional equivalence in logic operation, circuit configuration, and tri-state output behavior.

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

A: Both are 48-pin surface-mount packages with identical pin assignments. The primary difference is body width: TFSOP measures 0.240" (6.10mm) while BSSOP measures 0.295" (7.50mm). PCB footprints are not interchangeable without layout modification.

Q: Why do some substitutes have higher propagation delay specifications?

A: The SN74ALVCH16373DGG specifies 3.9ns propagation delay compared to 1ns for most alternatives. This part remains functionally equivalent but exhibits slower signal transition. Selection should consider timing-critical applications where propagation delay impacts system performance.

Q: Are all substitutes RoHS3 compliant?

A: Texas Instruments parts (SN74ALVCH series) are explicitly specified as ROHS3 compliant. IDT and Fairchild Semiconductor parts do not specify RoHS status in the provided data. For applications requiring RoHS3 certification, Texas Instruments alternatives are recommended.

Q: What supply voltage range should I verify for my application?

A: The original PI74VCX16373AE operates from 1.8V to 3.6V. Substitutes vary: Texas Instruments SN74ALVCH parts operate from 1.65V, Fairchild 74VCX parts from 1.2V to 1.4V, and IDT 74ALVCH162373PAG from 2.3V. Verify your design's supply voltage falls within the selected substitute's specified range.

Q: Can I use a substitute with higher output current rating?

A: Yes. Substitutes offering 12mA or 24mA output current (compared to the original 6mA) are backward-compatible for applications designed around the lower current specification. Higher output current provides additional drive capability without functional impact on existing designs.

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