74ACTQ16245MTDX Equivalent & Substitute Parts

Part Overview

The 74ACTQ16245MTDX is a non-inverting transceiver IC manufactured by onsemi, featuring 2 elements with 8 bits per element and 3-state output capability. This device operates at 4.5V to 5.5V supply voltage and is housed in a 48-TSSOP package. The part is currently classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity.

Key Parameters

Parameter	Value
Manufacturer Part Number	74ACTQ16245MTDX
Manufacturer	onsemi
Logic Type	Transceiver, Non-Inverting
Number of Elements	2
Number of Bits per Element	8
Output Type	3-State
Current - Output High, Low	24mA, 24mA
Voltage - Supply	4.5V ~ 5.5V
Operating Temperature	-40°C ~ 85°C (TA)
Package / Case	48-TFSOP (0.240", 6.10mm Width)
Mounting Type	Surface Mount
Product Status	Obsolete
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the 74ACTQ16245MTDX is determined by the following critical parameters:

Electrical Compatibility Requirements:

Logic Type: Transceiver, Non-Inverting (must match)
Number of Elements: 2 (must match)
Number of Bits per Element: 8 (must match)
Output Type: 3-State (must match)
Current - Output High, Low: 24mA, 24mA (must match)
Voltage - Supply: 4.5V ~ 5.5V (must match)
Operating Temperature: -40°C ~ 85°C (TA) (must match)

Mechanical Compatibility Requirements:

Package / Case: 48-TFSOP (0.240", 6.10mm Width) or equivalent 48-pin TSSOP package (must match)
Mounting Type: Surface Mount (must match)

Substitute parts are grouped into two categories: direct package equivalents (48-TSSOP) and package variants (48-SSOP/48-BSSOP) that maintain electrical compatibility but differ in physical dimensions.

Parameter Comparison

Part Number	Manufacturer	Logic Type	Elements	Bits/Element	Output Type	Current (mA)	Voltage (V)	Temp (°C)	Package	Status
74ACTQ16245MTDX	onsemi	Non-Inverting	2	8	3-State	24, 24	4.5~5.5	-40~85	48-TSSOP	Obsolete
74LCX16245MTDX	onsemi	Non-Inverting	2	8	3-State	24, 24	2.0~3.6	-40~85	48-TSSOP	Active
74ACT16245DL	Texas Instruments	Non-Inverting	2	8	3-State	24, 24	4.5~5.5	-40~85	48-SSOP	Last Time Buy
74ACT16245DLR	Texas Instruments	Non-Inverting	2	8	3-State	24, 24	4.5~5.5	-40~85	48-SSOP	Active
74ACT16245DGGR	Texas Instruments	Non-Inverting	2	8	3-State	24, 24	4.5~5.5	-40~85	48-TSSOP	Active
74FCT162245ATPACT	Texas Instruments	Non-Inverting	2	8	3-State	24, 24	4.5~5.5	-40~85	48-TSSOP	Obsolete
74FCT162245CTPACT	Texas Instruments	Non-Inverting	2	8	3-State	24, 24	4.5~5.5	-40~85	48-TSSOP	Obsolete
74FCT162245CTPAG8	IDT	Non-Inverting	2	8	3-State	24, 24	4.5~5.5	-40~85	48-TSSOP	Active
74FCT162H245ATPACT	Texas Instruments	Non-Inverting	2	8	3-State	24, 24	4.5~5.5	-40~85	48-TSSOP	Obsolete
74FCT162H245CTPACT	Texas Instruments	Non-Inverting	2	8	3-State	24, 24	4.5~5.5	-40~85	48-TSSOP	Obsolete
CY74FCT162245TPACT	Texas Instruments	Non-Inverting	2	8	3-State	24, 24	4.5~5.5	-40~85	48-TSSOP	Obsolete

Engineering Selection Recommendations

Primary Recommendation - Direct Package Equivalent: The 74ACT16245DGGR (Texas Instruments) is the preferred substitute. It maintains identical electrical specifications and package configuration (48-TSSOP), operates at the same voltage range (4.5V ~ 5.5V), and carries Active product status with ROHS3 compliance. This part provides the highest compatibility with existing PCB layouts and design requirements.

Alternative - Active Status with Package Variant: The 74ACT16245DLR (Texas Instruments) offers Active product status and identical electrical parameters but uses a 48-SSOP package (0.295", 7.50mm Width) instead of 48-TSSOP. This part requires PCB layout modification due to different package dimensions but provides long-term availability assurance.

Low-Voltage Alternative: The 74LCX16245MTDX (onsemi) operates at reduced voltage (2.0V ~ 3.6V) and is not electrically compatible with the original 4.5V ~ 5.5V specification. This part is suitable only for applications redesigned for low-voltage operation.

Obsolete Alternatives: Parts including 74FCT162245ATPACT, 74FCT162245CTPACT, 74FCT162H245ATPACT, 74FCT162H245CTPACT, and CY74FCT162245TPACT carry Obsolete status and should not be selected for new designs or long-term production requirements.

Frequently Asked Questions (FAQ)

Q: Can the 74LCX16245MTDX replace the 74ACTQ16245MTDX? A: No. The 74LCX16245MTDX operates at 2.0V ~ 3.6V supply voltage, while the 74ACTQ16245MTDX requires 4.5V ~ 5.5V. These parts are not electrically compatible and cannot be substituted without circuit redesign.

Q: What is the difference between 48-TSSOP and 48-SSOP packages? A: Both are 48-pin surface mount packages, but 48-TSSOP has a width of 0.240" (6.10mm), while 48-SSOP has a width of 0.295" (7.50mm). PCB footprints differ and are not interchangeable without layout modification.

Q: Is the 74ACT16245DGGR a direct replacement for the 74ACTQ16245MTDX? A: Yes. The 74ACT16245DGGR matches all critical electrical parameters (voltage, current, temperature range, logic type, element count, and bit width) and uses the identical 48-TSSOP package. It is the recommended substitute.

Q: Why are some substitute parts listed as Obsolete? A: Obsolete parts have been discontinued by manufacturers and are not recommended for new designs or production quantities. Active status parts ensure long-term availability and supply chain reliability.

Q: What does ROHS3 compliance mean? A: ROHS3 compliance indicates the part meets Restriction of Hazardous Substances Directive requirements, restricting lead and other hazardous materials. This certification is relevant for applications subject to environmental regulations.

Q: Can I use 74FCT series parts as substitutes? A: 74FCT series parts (74FCT162245ATPACT, 74FCT162245CTPACT, 74FCT162H245ATPACT, 74FCT162H245CTPACT, CY74FCT162245TPACT) match electrical specifications but carry Obsolete status. They are not suitable for new designs or long-term production.

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