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CBT3244ADB,112 Equivalent & Substitute Parts
Part Overview
The CBT3244ADB,112 is a 4 x 1:1 bus switch logic IC manufactured by Nexperia USA Inc. in a 20-SSOP package. This component functions as a high-speed multiplexer for digital signal routing in logic applications. The part is currently classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | CBT3244ADB,112 |
| Manufacturer | Nexperia USA Inc. |
| Product Category | Logic - Bus Switch |
| Circuit Configuration | 4 x 1:1 |
| Independent Circuits | 2 |
| Package Type | 20-SSOP (0.209", 5.30mm Width) |
| Voltage Supply Range | 4.5V ~ 5.5V |
| Operating Temperature Range | -40°C ~ 85°C |
| Mounting Type | Surface Mount |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level | 1 (Unlimited) |
| Product Status | Obsolete |
Substitute Part Grouping Explanation
Substitution for the CBT3244ADB,112 is determined by the following critical parameters:
Functional Equivalence: All substitute parts maintain the 4 x 1:1 bus switch configuration with 2 independent circuits, ensuring identical signal routing capability.
Electrical Compatibility: Substitute parts operate within overlapping voltage supply ranges (4V ~ 5.5V or 4.5V ~ 5.5V) and maintain the same operating temperature range (-40°C ~ 85°C), ensuring functional interchangeability in the same application environment.
Package Compatibility: Substitutes are available in three package variants—20-SSOP, 20-TSSOP, and 20-TVSOP—all surface-mount configurations with compatible pinouts. Package selection depends on PCB layout constraints and manufacturing capabilities.
Compliance & Certification: All substitute parts maintain ROHS3 compliance and REACH unaffected status, meeting the same regulatory requirements as the original part.
Manufacturer & Product Status: Texas Instruments manufactures all substitute variants. Product status ranges from Active to Last Time Buy, providing options for immediate availability or planned obsolescence management.
Parameter Comparison
| Part Number | Manufacturer | Package Type | Voltage Supply | Operating Temp | Product Status | MSL Rating | Inventory (Pcs) |
|---|---|---|---|---|---|---|---|
| CBT3244ADB,112 | Nexperia USA Inc. | 20-SSOP (5.30mm) | 4.5V ~ 5.5V | -40°C ~ 85°C | Obsolete | 1 (Unlimited) | 760 |
| SN74CBT3244CDBQR | Texas Instruments | 20-SSOP (3.90mm) | 4V ~ 5.5V | -40°C ~ 85°C | Active | 2 (1 Year) | 3406 |
| SN74CBT3244CDGVR | Texas Instruments | 20-TVSOP (4.40mm) | 4V ~ 5.5V | -40°C ~ 85°C | Active | 1 (Unlimited) | 2766 |
| SN74CBT3244CPW | Texas Instruments | 20-TSSOP (4.40mm) | 4V ~ 5.5V | -40°C ~ 85°C | Active | 1 (Unlimited) | 1336 |
| SN74CBT3244CPWR | Texas Instruments | 20-TSSOP (4.40mm) | 4V ~ 5.5V | -40°C ~ 85°C | Active | 1 (Unlimited) | 2215 |
| SN74CBT3244DBQR | Texas Instruments | 20-SSOP (3.90mm) | 4.5V ~ 5.5V | -40°C ~ 85°C | Last Time Buy | 2 (1 Year) | 3297 |
| SN74CBT3244DBR | Texas Instruments | 20-SSOP (5.30mm) | 4.5V ~ 5.5V | -40°C ~ 85°C | Last Time Buy | 1 (Unlimited) | 2377 |
| SN74CBT3244DGVR | Texas Instruments | 20-TVSOP (4.40mm) | 4.5V ~ 5.5V | -40°C ~ 85°C | Last Time Buy | 1 (Unlimited) | 4906 |
| SN74CBT3244PW | Texas Instruments | 20-TSSOP (4.40mm) | 4.5V ~ 5.5V | -40°C ~ 85°C | Last Time Buy | 1 (Unlimited) | 2100 |
| SN74CBT3244PWR | Texas Instruments | 20-TSSOP (4.40mm) | 4.5V ~ 5.5V | -40°C ~ 85°C | Obsolete | 1 (Unlimited) | 22400 |
Engineering Selection Recommendations
For Direct Package Replacement (20-SSOP, 5.30mm width): SN74CBT3244DBR provides the closest physical and electrical match with identical voltage supply range (4.5V ~ 5.5V) and MSL rating. This part is classified as Last Time Buy, indicating limited future availability.
For Active Product Status with Extended Support: SN74CBT3244CDBQR and SN74CBT3244CDGVR are both Active products from Texas Instruments. SN74CBT3244CDBQR maintains the 20-SSOP package format with reduced width (3.90mm), while SN74CBT3244CDGVR uses the 20-TVSOP package. Both support the extended voltage range (4V ~ 5.5V) and provide long-term availability.
For TSSOP Package Variants: SN74CBT3244CPW (Tube packaging) and SN74CBT3244CPWR (Tape & Reel) both use the 20-TSSOP package with 4.40mm width. SN74CBT3244CPWR is Active and recommended for new designs requiring this package format.
For High-Volume Procurement: SN74CBT3244PWR offers the largest inventory (22,400 pcs) in 20-TSSOP format, though it is classified as Obsolete. This part is suitable for immediate high-volume requirements but should not be selected for long-term production planning.
Compliance Consideration: All substitute parts maintain ROHS3 compliance and REACH unaffected status, meeting the regulatory requirements of the original CBT3244ADB,112.
Frequently Asked Questions (FAQ)
Q: Can SN74CBT3244CDBQR replace CBT3244ADB,112 directly on the PCB?
A: SN74CBT3244CDBQR is functionally equivalent with identical circuit configuration (4 x 1:1) and pinout compatibility. However, the package width differs (3.90mm vs. 5.30mm). PCB layout verification is required to confirm physical fit within the existing footprint.
Q: What is the difference between 20-SSOP, 20-TSSOP, and 20-TVSOP packages?
A: These are all surface-mount packages with 20 pins but differ in physical dimensions and thermal characteristics. 20-SSOP (Shrink Small Outline Package) has a 5.30mm or 3.90mm width depending on the variant. 20-TSSOP (Thin Shrink Small Outline Package) and 20-TVSOP (Thin Very Small Outline Package) both measure 4.40mm width. Package selection depends on PCB layout constraints and manufacturing equipment capabilities.
Q: Why do some substitutes support 4V ~ 5.5V while others support 4.5V ~ 5.5V?
A: The voltage supply range difference reflects manufacturer specifications. Parts supporting 4V ~ 5.5V (SN74CBT3244CDBQR, SN74CBT3244CDGVR, SN74CBT3244CPW, SN74CBT3244CPWR) provide broader voltage tolerance. For applications operating at 4V, these parts are required. For applications operating at 4.5V or higher, all substitutes are compatible.
Q: What does "Last Time Buy" product status mean?
A: Last Time Buy indicates the manufacturer has announced end-of-life for the part. Existing inventory is available for purchase, but no new production will occur after a specified date. Parts with this status should be used for current production runs but not selected for new long-term designs.
Q: Are there differences in moisture sensitivity between substitutes?
A: Yes. Parts with MSL 1 (Unlimited) have no moisture sensitivity restrictions and can be stored indefinitely. Parts with MSL 2 (1 Year) require controlled storage conditions and must be used within one year of the manufacturing date. SN74CBT3244CDBQR and SN74CBT3244DBQR have MSL 2 ratings; all other substitutes have MSL 1.
Q: Which substitute is recommended for new design implementations?
A: SN74CBT3244CPWR (Active status, 20-TSSOP package, Tape & Reel packaging) is recommended for new designs. It provides long-term manufacturer support, unlimited MSL rating, and broad voltage compatibility (4V ~ 5.5V).
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