PI74VCX16244AE Equivalent & Substitute Parts

Part Overview

The PI74VCX16244AE is a non-inverting buffer IC manufactured by Diodes Incorporated, designed for 4-element, 4-bit per element logic buffering with 3-state output capability. This component operates across a supply voltage range of 1.8V to 3.6V and is housed in a 48-TSSOP package. The part is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and production continuity.

Key Parameters

Parameter	Value
Manufacturer Part Number	PI74VCX16244AE
Manufacturer	Diodes Incorporated
Logic Type	Buffer, Non-Inverting
Number of Elements	4
Number of Bits per Element	4
Output Type	3-State
Current - Output High, Low	24mA, 24mA
Voltage - Supply	1.8V ~ 3.6V
Operating Temperature	-40°C ~ 85°C (TA)
Package / Case	48-TFSOP (0.240", 6.10mm Width)
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the PI74VCX16244AE is determined by the following critical parameters:

Functional Equivalence Requirements:

Logic Type: Buffer, Non-Inverting
Number of Elements: 4
Number of Bits per Element: 4
Output Type: 3-State
Operating Temperature Range: -40°C ~ 85°C (TA)

Electrical Compatibility Requirements:

Output Current Capability: Minimum 24mA (High and Low)
Supply Voltage Range: Must encompass or overlap with 1.8V ~ 3.6V
RoHS3 Compliance

Package Compatibility:

Primary: 48-TFSOP (0.240", 6.10mm Width) - 48-TSSOP supplier package
Secondary: 48-BSSOP (0.295", 7.50mm Width) - 48-SSOP supplier package (footprint variation acceptable with layout adjustment)

Substitute parts are grouped into two categories based on package type: TFSOP variants (pin-compatible) and BSSOP variants (footprint-compatible with layout modification).

Parameter Comparison

Part Number	Manufacturer	Series	Logic Type	Elements / Bits	Output Current (mA)	Supply Voltage (V)	Temp Range (°C)	Package	Status	RoHS3
PI74VCX16244AE	Diodes Inc.	74VCX	Buffer, Non-Inv	4 / 4	24, 24	1.8 ~ 3.6	-40 ~ 85	48-TFSOP	Obsolete	Yes
74ALVC162244PAG	IDT	74ALVC	Buffer, Non-Inv	4 / 4	24, 24	2.7 ~ 3.6	-40 ~ 85	48-TFSOP	Active	Not specified
74ALVC16244DGG,118	Nexperia USA Inc.	74ALVC	Buffer, Non-Inv	4 / 4	24, 24	1.2 ~ 3.6	-40 ~ 85	48-TFSOP	Active	Yes
74ALVC16244MTDX	Fairchild Semiconductor	74ALVC	Buffer, Non-Inv	4 / 4	24, 24	1.65 ~ 3.6	-40 ~ 85	48-TFSOP	Active	Not specified
74ALVCH162244PAG8	IDT	74ALVCH	Buffer, Non-Inv	4 / 4	12, 12	2.7 ~ 3.6	-40 ~ 85	48-TFSOP	Active	Not specified
SN74ALVC16244ADGGR	Texas Instruments	74ALVC	Buffer, Non-Inv	4 / 4	24, 24	1.65 ~ 3.6	-40 ~ 85	48-TFSOP	Active	Yes
SN74ALVC16244ADL	Texas Instruments	74ALVC	Buffer, Non-Inv	4 / 4	24, 24	1.65 ~ 3.6	-40 ~ 85	48-BSSOP	Active	Yes
SN74ALVC16244ADLR	Texas Instruments	74ALVC	Buffer, Non-Inv	4 / 4	24, 24	1.65 ~ 3.6	-40 ~ 85	48-BSSOP	Active	Yes
SN74ALVCH162244DL	Texas Instruments	74ALVCH	Buffer, Non-Inv	4 / 4	12, 12	1.65 ~ 3.6	-40 ~ 85	48-BSSOP	Active	Yes
SN74ALVCH162244DLR	Texas Instruments	74ALVCH	Buffer, Non-Inv	4 / 4	12, 12	1.65 ~ 3.6	-40 ~ 85	48-BSSOP	Active	Yes
SN74ALVCH162244GR	Texas Instruments	74ALVCH	Buffer, Non-Inv	4 / 4	12, 12	1.65 ~ 3.6	-40 ~ 85	48-TFSOP	Active	Yes

Engineering Selection Recommendations

Primary Substitutes (Full Electrical and Package Compatibility):

The 74ALVC16244DGG,118 (Nexperia) and SN74ALVC16244ADGGR (Texas Instruments) are direct substitutes. Both maintain 24mA output current capability, support the full 1.8V to 3.6V supply range required by the original design, and are housed in the 48-TFSOP package. Both parts carry Active product status and RoHS3 compliance, ensuring long-term availability and regulatory alignment.

Secondary Substitutes (Reduced Output Current):

The 74ALVCH162244PAG8 (IDT) and SN74ALVCH162244GR (Texas Instruments) provide functional equivalence with reduced output current (12mA versus 24mA). These parts are suitable for applications where the lower drive capability is acceptable. Both maintain the 48-TFSOP package and Active product status.

Package Variant Substitutes (BSSOP):

The SN74ALVC16244ADL, SN74ALVC16244ADLR, SN74ALVCH162244DL, and SN74ALVCH162244DLR are housed in the 48-BSSOP package. These require PCB layout modification due to different footprint dimensions (0.295" versus 0.240" width). Selection between these variants depends on output current requirements: 24mA for ALVC series or 12mA for ALVCH series.

Compliance Considerations:

All recommended substitutes maintain RoHS3 compliance and MSL Level 1 (Unlimited) moisture sensitivity ratings, ensuring compatibility with standard manufacturing and storage practices.

Frequently Asked Questions (FAQ)

Q: Can I use a 74ALVCH part as a direct replacement for the PI74VCX16244AE?

A: Yes, functionally. However, 74ALVCH variants provide 12mA output current versus the original 24mA. Verify that your circuit design does not require the higher drive capability before substitution.

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

A: Both are 48-pin surface-mount packages with different physical dimensions. 48-TFSOP has a 0.240" width, while 48-BSSOP has a 0.295" width. TFSOP variants are pin-compatible with the original PI74VCX16244AE. BSSOP variants require PCB layout modification.

Q: Are all substitute parts RoHS3 compliant?

A: Most are. SN74ALVC16244ADGGR, SN74ALVC16244ADL, SN74ALVC16244ADLR, SN74ALVCH162244DL, SN74ALVCH162244DLR, and SN74ALVCH162244GR are explicitly RoHS3 compliant. Verify compliance documentation for 74ALVC162244PAG and 74ALVC16244MTDX with your supplier.

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

A: The original PI74VCX16244AE operates from 1.8V to 3.6V. Most substitutes support this range or wider. The 74ALVC162244PAG operates from 2.7V to 3.6V, which excludes 1.8V operation. Confirm your circuit's minimum supply voltage before selecting this part.

Q: Can I mix different substitute parts in the same design?

A: Yes, provided they meet your electrical requirements. However, maintain consistency within a single PCB to simplify inventory management and reduce assembly complexity.

Q: Which substitute offers the best long-term availability?

A: Texas Instruments (SN74ALVC16244ADGGR, SN74ALVC16244ADL, SN74ALVC16244ADLR) and Nexperia (74ALVC16244DGG,118) are established suppliers with Active product status and high inventory levels, indicating strong long-term support.

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