74ACTQ16541MTDX Equivalent & Substitute Parts

Part Overview

The 74ACTQ16541MTDX is a non-inverting buffer IC manufactured by onsemi, featuring 2 elements with 8 bits per element and 3-state output capability. This component operates within a 4.5V to 5.5V supply voltage range and is housed in a 48-TSSOP package. The part is currently classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and production continuity.

Key Parameters

Parameter	Value
Manufacturer Part Number	74ACTQ16541MTDX
Manufacturer	onsemi
Logic Type	Buffer, 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)
Mounting Type	Surface Mount
Package / Case	48-TFSOP (0.240", 6.10mm Width)
Product Status	Obsolete
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the 74ACTQ16541MTDX is determined by the following critical parameters:

Logic Function: Buffer, Non-Inverting configuration with identical element and bit-per-element count (2 elements, 8 bits per element)
Output Architecture: 3-State output capability
Drive Capability: Output current specifications of 24mA high and 24mA low
Operating Temperature Range: -40°C to 85°C
Supply Voltage Compatibility: Parts must operate within or encompass the 4.5V to 5.5V range
Package Compatibility: Physical form factor and pin configuration must match or be mechanically compatible

The substitute parts identified below meet these core functional and electrical requirements while differing in packaging format, manufacturer, and product lifecycle status.

Parameter Comparison

Parameter	74ACTQ16541MTDX (onsemi)	74ACT16541DL (TI)	74ACT16541DLR (TI)	SN74LVCH16541ADGGR (TI)
Logic Type	Buffer, Non-Inverting	Buffer, Non-Inverting	Buffer, Non-Inverting	Buffer, Non-Inverting
Number of Elements	2	2	2	2
Number of Bits per Element	8	8	8	8
Output Type	3-State	3-State	3-State	3-State
Current - Output High, Low	24mA, 24mA	24mA, 24mA	24mA, 24mA	24mA, 24mA
Voltage - Supply	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V	1.65V ~ 3.6V
Operating Temperature	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	48-TFSOP (0.240", 6.10mm Width)	48-BSSOP (0.295", 7.50mm Width)	48-BSSOP (0.295", 7.50mm Width)	48-TFSOP (0.240", 6.10mm Width)
Product Status	Obsolete	Last Time Buy	Active	Active
RoHS Status	Not specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

74ACT16541DLR (Texas Instruments) is the primary substitute for new designs and production. This part maintains full electrical and functional equivalence with the original 74ACTQ16541MTDX, including identical supply voltage range (4.5V ~ 5.5V), output drive capability (24mA), and operating temperature specifications. The 74ACT16541DLR carries Active product status, ensuring long-term availability and supply chain stability. It is ROHS3 compliant and available in Tape & Reel packaging format with 3953 units in current inventory.

74ACT16541DL (Texas Instruments) serves as an alternative with equivalent electrical specifications but carries Last Time Buy status, indicating limited future availability. This part is suitable for legacy system maintenance where existing inventory exists.

SN74LVCH16541ADGGR (Texas Instruments) provides functional equivalence with a critical distinction: its supply voltage range is 1.65V to 3.6V, which does not encompass the original 4.5V to 5.5V specification. This part is suitable only for applications where the system voltage has been redesigned to operate within the lower voltage range. The SN74LVCH16541ADGGR maintains the same 48-TFSOP package format as the original part and carries Active product status with ROHS3 compliance.

Frequently Asked Questions (FAQ)

Q: Can 74ACT16541DL and 74ACT16541DLR be used interchangeably with 74ACTQ16541MTDX?

A: Yes, both parts are electrically and functionally equivalent. The primary difference is packaging format: 74ACT16541DL and 74ACT16541DLR use 48-BSSOP (0.295" width) versus the original 48-TFSOP (0.240" width). PCB layout modifications are required to accommodate the different package dimensions. 74ACT16541DLR is preferred for new applications due to its Active product status.

Q: What is the key limitation of SN74LVCH16541ADGGR as a substitute?

A: The SN74LVCH16541ADGGR operates at 1.65V to 3.6V supply voltage, which is incompatible with the original specification of 4.5V to 5.5V. This part is suitable only if the entire system has been redesigned for low-voltage operation. Direct substitution in existing 5V systems is not possible.

Q: Are there package compatibility concerns between the substitute parts?

A: Yes. The original 74ACTQ16541MTDX and SN74LVCH16541ADGGR both use 48-TFSOP packaging (0.240" width), allowing direct PCB footprint compatibility. The 74ACT16541DL and 74ACT16541DLR use 48-BSSOP packaging (0.295" width), requiring PCB layout redesign. Verify footprint compatibility before component selection.

Q: Which substitute part should be selected for new production?

A: 74ACT16541DLR is the recommended choice for new production. It maintains full electrical equivalence, carries Active product status ensuring long-term availability, is ROHS3 compliant, and has the highest current inventory (3953 units). PCB layout must be updated to accommodate the 48-BSSOP package format.

Q: Are all substitute parts ROHS3 compliant?

A: The Texas Instruments parts (74ACT16541DL, 74ACT16541DLR, and SN74LVCH16541ADGGR) are all ROHS3 compliant. The original onsemi part (74ACTQ16541MTDX) does not specify RoHS status in the provided data.

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