74ABT16952CSSCX Equivalent & Substitute Parts

Part Overview

The 74ABT16952CSSCX is a non-inverting transceiver logic IC manufactured by onsemi, featuring 2 elements with 8 bits per element and 3-state output capability in a 56-SSOP package. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

The 74ABT16952 series operates within the 4.5V to 5.5V supply voltage range with output drive capabilities of 32mA (high) and 64mA (low), suitable for bus transceiver applications requiring bidirectional signal buffering and isolation.

Key Parameters

Parameter	Value
Logic Type	Transceiver, Non-Inverting
Number of Elements	2
Number of Bits per Element	8
Output Type	3-State
Current - Output High	32mA
Current - Output Low	64mA
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)
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the 74ABT16952CSSCX 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: 32mA, 64mA
Voltage - Supply: 4.5V ~ 5.5V
Operating Temperature: -40°C ~ 85°C (TA)
Mounting Type: Surface Mount
Package / Case: 56-BSSOP or compatible 56-pin SSOP variants

Substitute parts are grouped into three categories:

Direct Manufacturer Equivalents (Same Base Part, Different Packaging): Parts sharing the identical 74ABT16952 base product number with all electrical parameters matching exactly. Packaging differences (Tape & Reel, Tube) do not affect functional compatibility.

Similar Manufacturer Variants (Same Base Series, Package Variation): Parts with the 74ABT16952 base number but alternative package designations (56-TSSOP vs. 56-BSSOP). Physical dimensions differ slightly; PCB layout verification is required.

Parametric Equivalents (Different Base Part, Identical Electrical Specifications): Parts from the 74ABT and 74FCT series with matching electrical parameters, element count, bit width, and output drive characteristics. These provide functional equivalence despite different part numbering.

Parameter Comparison

Part Number	Manufacturer	Series	Logic Type	Elements	Bits/Element	Output Type	I_out High/Low (mA)	V_supply (V)	Temp Range (°C)	Package	Product Status
74ABT16952CSSCX	onsemi	74ABT	Non-Inverting	2	8	3-State	32/64	4.5-5.5	-40 to 85	56-BSSOP	Obsolete
SN74ABT16952DLR	Texas Instruments	74ABT	Non-Inverting	2	8	3-State	32/64	4.5-5.5	-40 to 85	56-BSSOP	Active
SN74ABT16952DGGR	Texas Instruments	74ABT	Non-Inverting	2	8	3-State	32/64	4.5-5.5	-40 to 85	56-TFSOP	Active
SN74ABT16952DL	Texas Instruments	74ABT	Non-Inverting	2	8	3-State	32/64	4.5-5.5	-40 to 85	56-BSSOP	Active
SN74ABT16543DLR	Texas Instruments	74ABT	Non-Inverting	2	8	3-State	32/64	4.5-5.5	-40 to 85	56-BSSOP	Active
SN74ABT16646DLR	Texas Instruments	74ABT	Non-Inverting	2	8	3-State	32/64	4.5-5.5	-40 to 85	56-BSSOP	Active
SN74ABT16652DLR	Texas Instruments	74ABT	Non-Inverting	2	8	3-State	32/64	4.5-5.5	-40 to 85	56-BSSOP	Active
SN74ABT16470DLR	Texas Instruments	74ABT	Non-Inverting	2	8	3-State	32/64	4.5-5.5	-40 to 85	56-BSSOP	Discontinued
CY74FCT16543CTPVCT	Texas Instruments	74FCT	Non-Inverting	2	8	3-State	32/64	4.5-5.5	-40 to 85	56-BSSOP	Obsolete
CY74FCT16646CTPVCT	Texas Instruments	74FCT	Non-Inverting	2	8	3-State	32/64	4.5-5.5	-40 to 85	56-BSSOP	Obsolete
CY74FCT16652ATPVCT	Texas Instruments	74FCT	Non-Inverting	2	8	3-State	32/64	4.5-5.5	-40 to 85	56-BSSOP	Obsolete

Engineering Selection Recommendations

Primary Recommendation: SN74ABT16952DLR or SN74ABT16952DL (Texas Instruments)

These parts provide direct functional equivalence to the 74ABT16952CSSCX with active product status and ROHS3 compliance. Both maintain identical electrical specifications and 56-BSSOP packaging. SN74ABT16952DLR is supplied in Tape & Reel format suitable for automated assembly; SN74ABT16952DL is supplied in Tube format for manual handling.

Secondary Recommendations: SN74ABT16543DLR, SN74ABT16646DLR, SN74ABT16652DLR

These parametric equivalents share all critical electrical parameters and maintain active product status with ROHS3 compliance. Selection among these variants depends on specific application requirements beyond the scope of basic transceiver functionality, as documented in individual device datasheets.

Alternative for Package Flexibility: SN74ABT16952DGGR

This variant provides the same electrical performance in a 56-TFSOP package (0.240" width vs. 0.295" for BSSOP). Use only if PCB layout accommodates the narrower package footprint.

Not Recommended: CY74FCT16543CTPVCT, CY74FCT16646CTPVCT, CY74FCT16652ATPVCT, SN74ABT16470DLR

These parts are obsolete or discontinued. While electrically equivalent, they offer no procurement advantage over active alternatives and may face supply constraints.

Frequently Asked Questions (FAQ)

Q: Can SN74ABT16952DLR directly replace 74ABT16952CSSCX without PCB modification?

A: Yes. Both parts share identical electrical specifications, pin configuration, and 56-BSSOP package dimensions. No PCB layout changes are required.

Q: What is the difference between SN74ABT16952DLR and SN74ABT16952DGGR?

A: Both provide identical electrical performance. The primary difference is package type: DLR uses 56-BSSOP (0.295" width), while DGGR uses 56-TFSOP (0.240" width). TFSOP is narrower and requires verification that your PCB footprint accommodates this dimension.

Q: Are the parametric equivalents (SN74ABT16543DLR, SN74ABT16646DLR, SN74ABT16652DLR) pin-compatible with the original part?

A: These parts share identical electrical parameters and package type but may have different internal logic configurations. Pin compatibility must be verified against individual device datasheets before substitution.

Q: Why is the onsemi 74ABT16952CSSCX marked as obsolete?

A: Obsolescence indicates the manufacturer has discontinued production. Texas Instruments maintains active production of equivalent 74ABT16952 variants, making them the recommended source for ongoing procurement.

Q: Do all substitute parts meet ROHS3 compliance?

A: All active Texas Instruments alternatives (SN74ABT16952DLR, SN74ABT16952DL, SN74ABT16952DGGR, SN74ABT16543DLR, SN74ABT16646DLR, SN74ABT16652DLR) are ROHS3 compliant. Obsolete variants (74FCT series) are also ROHS3 compliant but are not recommended due to discontinued status.

Q: What is the moisture sensitivity level for substitute parts?

A: All substitute parts maintain MSL 1 (Unlimited), matching the original component. No special moisture handling procedures are required.

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