74ACTQ16646SSCX Equivalent & Substitute Parts

Part Overview

The 74ACTQ16646SSCX is a non-inverting transceiver IC manufactured by onsemi, featuring 2 elements with 8 bits per element and 3-state output capability in a 56-SSOP package. This component operates within the 4.5V to 5.5V supply voltage range and is rated for -40°C to 85°C operating temperature. The part is currently classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Key Parameters

Parameter	Value
Manufacturer Part Number	74ACTQ16646SSCX
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)
Mounting Type	Surface Mount
Package / Case	56-BSSOP (0.295", 7.50mm Width)
Supplier Device Package	56-SSOP
Moisture Sensitivity Level (MSL)	1 (Unlimited)
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution for the 74ACTQ16646SSCX is determined by strict equivalence across the following critical parameters:

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: 56-BSSOP (0.295", 7.50mm Width)
Supplier Device Package: 56-SSOP

All substitute parts listed maintain identical electrical specifications and mechanical compatibility. Differences in product status, packaging format (tube vs. tape & reel), and manufacturer reflect availability and procurement options rather than functional divergence.

Parameter Comparison

Part Number	Manufacturer	Logic Type	Elements	Bits/Element	Output Type	Current (mA)	Supply Voltage	Temp Range	Package	Product Status	Packaging Format
74ACTQ16646SSCX	onsemi	Non-Inverting Transceiver	2	8	3-State	24/24	4.5V ~ 5.5V	-40°C ~ 85°C	56-BSSOP	Obsolete	-
74ACT16646DL	Texas Instruments	Non-Inverting Transceiver	2	8	3-State	24/24	4.5V ~ 5.5V	-40°C ~ 85°C	56-BSSOP	Last Time Buy	Tube
74ACT16543DLR	Texas Instruments	Non-Inverting Transceiver	2	8	3-State	24/24	4.5V ~ 5.5V	-40°C ~ 85°C	56-BSSOP	Active	Tape & Reel
74ACT16646DLR	Texas Instruments	Non-Inverting Transceiver	2	8	3-State	24/24	4.5V ~ 5.5V	-40°C ~ 85°C	56-BSSOP	Active	Tape & Reel
74ACT16652DLR	Texas Instruments	Non-Inverting Transceiver	2	8	3-State	24/24	4.5V ~ 5.5V	-40°C ~ 85°C	56-BSSOP	Active	Tape & Reel
74ACT16657DLR	Texas Instruments	Non-Inverting Transceiver	2	8	3-State	24/24	4.5V ~ 5.5V	-40°C ~ 85°C	56-BSSOP	Active	Tape & Reel
74FCT162652ATPVCT	Texas Instruments	Non-Inverting Transceiver	2	8	3-State	24/24	4.5V ~ 5.5V	-40°C ~ 85°C	56-BSSOP	Obsolete	-
CY74FCT162543TPVCT	Texas Instruments	Non-Inverting Transceiver	2	8	3-State	24/24	4.5V ~ 5.5V	-40°C ~ 85°C	56-BSSOP	Obsolete	-

Engineering Selection Recommendations

For new designs and long-term procurement, select from parts with Active product status: 74ACT16543DLR, 74ACT16646DLR, 74ACT16652DLR, or 74ACT16657DLR. All four are manufactured by Texas Instruments and supplied in Tape & Reel packaging, which is standard for production environments.

The 74ACT16646DLR provides the closest functional equivalence to the original 74ACTQ16646SSCX, maintaining the same base product number (74ACT16646) and identical electrical specifications. This part is currently in active production status with ROHS3 compliance.

For immediate replacement where existing inventory must be utilized, 74ACT16646DL (Last Time Buy status, Tube packaging) offers functional equivalence but represents a transitional option. The 74FCT162652ATPVCT and CY74FCT162543TPVCT are obsolete and should not be selected for new applications.

All substitute parts maintain REACH Unaffected status and identical MSL ratings, ensuring compatibility with standard manufacturing and storage protocols.

Frequently Asked Questions (FAQ)

Q: Can 74ACT16543DLR be used as a direct replacement for 74ACTQ16646SSCX?

A: Yes. Both parts share identical electrical parameters: 2-element, 8-bit non-inverting transceiver with 3-state output, 24mA output current, 4.5V to 5.5V supply voltage, -40°C to 85°C operating range, and 56-BSSOP package. The difference is in base product number and manufacturer (Texas Instruments vs. onsemi), but functional compatibility is complete.

Q: What is the difference between 74ACT16646DL and 74ACT16646DLR?

A: Both are identical in electrical specifications and package type (56-BSSOP). The primary difference is packaging format: 74ACT16646DL is supplied in Tube format, while 74ACT16646DLR is supplied in Tape & Reel format. Tape & Reel is standard for automated assembly environments. 74ACT16646DL carries Last Time Buy status, indicating limited future availability.

Q: Why are 74FCT162652ATPVCT and CY74FCT162543TPVCT listed if they are obsolete?

A: These parts are included for reference and inventory management purposes. They maintain full electrical and mechanical compatibility with the 74ACTQ16646SSCX but should not be selected for new designs. They are suitable only for replacement of existing units where current stock exists.

Q: Are all substitute parts ROHS3 compliant?

A: All Texas Instruments substitute parts (74ACT16646DL, 74ACT16543DLR, 74ACT16646DLR, 74ACT16652DLR, 74ACT16657DLR, 74FCT162652ATPVCT, CY74FCT162543TPVCT) are ROHS3 compliant. The original 74ACTQ16646SSCX does not specify ROHS status in the provided data.

Q: Can these parts be used interchangeably in existing PCB designs?

A: Yes, all substitute parts use the identical 56-BSSOP package with matching pinout and electrical characteristics. No PCB redesign is required for substitution.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message