SCAN18245TSSCX Equivalent & Substitute Parts

Part Overview

The SCAN18245TSSCX is a non-inverting transceiver logic IC manufactured by onsemi, configured as a 2-element, 9-bit per element device with 3-state output capability in a 56-SSOP surface mount package. This component operates across a 4.5V to 5.5V supply voltage range and is rated for -40°C to 85°C operating temperature.

The SCAN18245TSSCX is classified as obsolete. Equivalent substitute parts are available from Texas Instruments across multiple product series, offering identical or compatible electrical and mechanical specifications to support continued system design and production requirements.

Key Parameters

Parameter	Value
Logic Type	Transceiver, Non-Inverting
Number of Elements	2
Number of Bits per Element	9
Output Type	3-State
Current - Output High, Low	32mA, 64mA
Voltage - Supply	4.5V ~ 5.5V
Operating Temperature	-40°C ~ 85°C (TA)
Package / Case	56-BSSOP (0.295", 7.50mm Width)
Mounting Type	Surface Mount
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the SCAN18245TSSCX are classified into two functional groups based on bit-per-element configuration:

Group 1: Full Functional Equivalents (9-Bit per Element) Only SN74ABT16863DLR maintains the exact 9-bit per element configuration of the original part. This substitute provides direct functional equivalence with identical transceiver architecture and bit width.

Group 2: Parametric Equivalents (8-Bit per Element) The remaining substitute parts operate with 8 bits per element instead of 9 bits. These parts share all other critical parameters: non-inverting transceiver logic, 2-element configuration, 3-state output, identical output current ratings (32mA/64mA), matching supply voltage range (4.5V ~ 5.5V), equivalent operating temperature range (-40°C ~ 85°C), and identical 56-BSSOP package specifications.

Substitution eligibility is determined by:

Logic type (non-inverting transceiver)
Number of elements (2)
Output type (3-state)
Output current capability (32mA/64mA)
Supply voltage compatibility (4.5V ~ 5.5V)
Package form factor (56-BSSOP)
Operating temperature range (-40°C ~ 85°C)

Parameter Comparison

Part Number	Manufacturer	Series	Bits per Element	Product Status	RoHS Status	Inventory (Pcs)
SCAN18245TSSCX	onsemi	SCAN	9	Obsolete	REACH Unaffected	1725
SN74ABT16863DLR	Texas Instruments	74ABT	9	Active	ROHS3 Compliant	781
CY74FCT16543CTPVCT	Texas Instruments	74FCT	8	Obsolete	ROHS3 Compliant	1093
CY74FCT16646CTPVCT	Texas Instruments	74FCT	8	Obsolete	ROHS3 Compliant	1008
CY74FCT16652ATPVCT	Texas Instruments	74FCT	8	Obsolete	ROHS3 Compliant	2468
SN74ABT16470DLR	Texas Instruments	74ABT	8	Discontinued at DiGi Electronics	ROHS3 Compliant	897
SN74ABT16543DLR	Texas Instruments	74ABT	8	Active	ROHS3 Compliant	3200
SN74ABT16646DLR	Texas Instruments	74ABT	8	Active	ROHS3 Compliant	2300
SN74ABT16652DLR	Texas Instruments	74ABT	8	Active	ROHS3 Compliant	3400
SN74ABT16657DLR	Texas Instruments	74ABT	8	Active	ROHS3 Compliant	3300
SN74ABT16952DLR	Texas Instruments	74ABT	8	Active	ROHS3 Compliant	6100

Engineering Selection Recommendations

Primary Recommendation: SN74ABT16863DLR

The SN74ABT16863DLR is the preferred substitute for direct replacement of the SCAN18245TSSCX. This part maintains the exact 9-bit per element configuration and is currently in active production status. It carries ROHS3 compliance certification and demonstrates adequate inventory availability (781 units). The 74ABT series provides established reliability in high-speed transceiver applications.

Secondary Recommendations: 8-Bit Alternatives

For applications where 8-bit per element operation is acceptable, the following active-status parts are available:

SN74ABT16952DLR: Highest inventory availability (6100 units), active status, ROHS3 compliant
SN74ABT16652DLR: 3400 units in stock, active status, ROHS3 compliant
SN74ABT16657DLR: 3300 units in stock, active status, ROHS3 compliant
SN74ABT16543DLR: 3200 units in stock, active status, ROHS3 compliant
SN74ABT16646DLR: 2300 units in stock, active status, ROHS3 compliant

All 8-bit alternatives maintain identical electrical specifications for supply voltage, output current, operating temperature, and package form factor. Selection among these options should be based on application-specific bit-width requirements and inventory availability.

Obsolete Alternatives (Not Recommended for New Designs)

CY74FCT16543CTPVCT, CY74FCT16646CTPVCT, and CY74FCT16652ATPVCT are classified as obsolete. SN74ABT16470DLR is discontinued at DiGi Electronics. These parts should not be selected for new production designs.

Frequently Asked Questions (FAQ)

Q: Can I use an 8-bit substitute part in place of the 9-bit SCAN18245TSSCX?

A: Substitution depends on your application requirements. The 8-bit alternatives (SN74ABT16952DLR, SN74ABT16652DLR, SN74ABT16657DLR, SN74ABT16543DLR, SN74ABT16646DLR) share all electrical and mechanical specifications except bit width. If your circuit design requires 9-bit data handling, only SN74ABT16863DLR provides direct equivalence. If your application uses only 8 bits of the available 9-bit capacity, 8-bit alternatives are electrically compatible.

Q: Are all substitute parts in the same package?

A: Yes. All substitute parts use the 56-BSSOP package (0.295", 7.50mm width), identical to the SCAN18245TSSCX. Pin-to-pin compatibility is maintained for all listed alternatives.

Q: What is the difference between the 74ABT and 74FCT series substitutes?

A: Both series provide non-inverting transceiver logic with identical electrical specifications for this application. The 74ABT series parts are currently in active production status, while the 74FCT series parts are obsolete. For new designs, 74ABT series selection is recommended.

Q: Do all substitute parts meet RoHS compliance?

A: The SCAN18245TSSCX is REACH Unaffected. All Texas Instruments substitute parts listed carry ROHS3 Compliant certification, meeting current environmental compliance standards.

Q: Which substitute part has the best inventory availability?

A: SN74ABT16952DLR offers the highest inventory level at 6100 units in stock. This part is active status and ROHS3 compliant, making it suitable for high-volume production requirements.

Q: Are there any differences in output current specifications between the main part and substitutes?

A: No. All parts, including the SCAN18245TSSCX and all listed substitutes, maintain identical output current specifications: 32mA (output high) and 64mA (output low).

Q: What is the operating temperature range for all these parts?

A: All parts operate across the identical temperature range: -40°C to 85°C (TA). No thermal performance differences exist between the main part and any substitute.

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