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CBT3245ADB,112 Equivalent & Substitute Parts
Part Overview
The CBT3245ADB,112 is an 8x1:1 bus switch logic IC manufactured by Nexperia USA Inc., housed in a 20-SSOP package. This component operates across a 4V to 5.5V supply range and supports operating temperatures from -40°C to 85°C. The part is classified as obsolete, making identification of functionally equivalent substitutes essential for ongoing design support and production continuity.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | CBT3245ADB,112 |
| Manufacturer | Nexperia USA Inc. |
| Type | Bus Switch |
| Circuit Configuration | 8 x 1:1 |
| Independent Circuits | 1 |
| Voltage Supply Range | 4V ~ 5.5V |
| Operating Temperature Range | -40°C ~ 85°C |
| Package Type | 20-SSOP (0.209", 5.30mm Width) |
| Mounting Type | Surface Mount |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level | 1 (Unlimited) |
| Product Status | Obsolete |
Substitute Part Grouping Explanation
Substitution eligibility for the CBT3245ADB,112 is determined by the following critical parameters:
Core Functional Requirements:
- Circuit type: 8 x 1:1 bus switch configuration
- Independent circuits: 1
- Voltage supply range compatibility: Minimum 4V, maximum 5.5V
- Operating temperature range: -40°C to 85°C
- Mounting type: Surface mount
Package Considerations: Substitutes are grouped by package type. The original CBT3245ADB,112 uses a 20-SSOP package (0.209" width). Functionally equivalent parts may use alternative 20-pin packages including 20-TSSOP, 20-QSOP, and 20-TVSOP, provided PCB layout accommodates the physical dimensions.
Compliance Requirements: All substitute parts maintain ROHS3 compliance and EAR99 classification, ensuring regulatory consistency.
Parameter Comparison
| Part Number | Manufacturer | Circuit Config | Voltage Supply | Temp Range | Package Type | Package Width | RoHS Status | Product Status | Inventory |
|---|---|---|---|---|---|---|---|---|---|
| CBT3245ADB,112 | Nexperia USA Inc. | 8 x 1:1 | 4V ~ 5.5V | -40°C ~ 85°C | 20-SSOP | 0.209" | ROHS3 | Obsolete | 785 Pcs |
| FST3245MTCX | onsemi | 8 x 1:1 | 4V ~ 5.5V | -40°C ~ 85°C | 20-TSSOP | 0.173" | ROHS3 | Obsolete | 20498 Pcs |
| PI5C3245LE | Diodes Incorporated | 8 x 1:1 | 4.75V ~ 5.25V | -40°C ~ 85°C | 20-TSSOP | 0.173" | ROHS3 | Last Time Buy | 1417 Pcs |
| PI5C3245LEX | Diodes Incorporated | 8 x 1:1 | 4.75V ~ 5.25V | -40°C ~ 85°C | 20-TSSOP | 0.173" | ROHS3 | Last Time Buy | 1498 Pcs |
| PI5C3245QEX | Diodes Incorporated | 8 x 1:1 | 4.75V ~ 5.25V | -40°C ~ 85°C | 20-QSOP | 0.154" | ROHS3 | Last Time Buy | 9262 Pcs |
| SN74CBT3245ADBQR | Texas Instruments | 8 x 1:1 | 4V ~ 5.5V | -40°C ~ 85°C | 20-SSOP | 0.154" | ROHS3 | Last Time Buy | 2400 Pcs |
| SN74CBT3245ADBR | Texas Instruments | 8 x 1:1 | 4V ~ 5.5V | -40°C ~ 85°C | 20-SSOP | 0.209" | ROHS3 | Last Time Buy | 2200 Pcs |
| SN74CBT3245ADGVR | Texas Instruments | 8 x 1:1 | 4V ~ 5.5V | -40°C ~ 85°C | 20-TVSOP | 0.173" | ROHS3 | Last Time Buy | 2708 Pcs |
| SN74CBT3245APW | Texas Instruments | 8 x 1:1 | 4V ~ 5.5V | -40°C ~ 85°C | 20-TSSOP | 0.173" | ROHS3 | Last Time Buy | 2152 Pcs |
| SN74CBT3245APWR | Texas Instruments | 8 x 1:1 | 4V ~ 5.5V | -40°C ~ 85°C | 20-TSSOP | 0.173" | ROHS3 | Last Time Buy | 6178 Pcs |
| SN74CBT3245CDBQR | Texas Instruments | 8 x 1:1 | 4V ~ 5.5V | -40°C ~ 85°C | 20-SSOP | 0.154" | ROHS3 | Active | 3643 Pcs |
Engineering Selection Recommendations
For Direct Pin-Compatible Replacement (Same Package Footprint): SN74CBT3245ADBR is the preferred substitute when maintaining the original 20-SSOP package (0.209" width) is required. This Texas Instruments part carries Last Time Buy status and maintains identical voltage supply range (4V ~ 5.5V) and operating temperature specifications (-40°C ~ 85°C). Both parts are ROHS3 compliant with MSL 1 rating.
For Active Product Status: SN74CBT3245CDBQR is the only active product among the substitutes, manufactured by Texas Instruments. While it uses a 20-SSOP package with narrower width (0.154"), it maintains full functional equivalence with identical electrical specifications. This part is recommended for new designs requiring long-term availability assurance.
For Alternative Package Formats: When PCB layout permits package variation, the following options provide extended inventory availability:
- SN74CBT3245APWR (20-TSSOP, 6178 Pcs available) offers the highest stock level among Texas Instruments alternatives
- PI5C3245QEX (20-QSOP, 9262 Pcs available) provides maximum inventory depth from Diodes Incorporated
- FST3245MTCX (20-TSSOP, 20498 Pcs available) from onsemi offers the largest available stock
Voltage Supply Consideration: PI5C3245LE, PI5C3245LEX, and PI5C3245QEX from Diodes Incorporated operate within a narrower voltage range (4.75V ~ 5.25V) compared to the original part (4V ~ 5.5V). These parts are suitable only for applications with regulated 5V supplies that remain within this tighter specification window.
Frequently Asked Questions (FAQ)
Q: Can I use SN74CBT3245CDBQR as a direct replacement for CBT3245ADB,112? A: SN74CBT3245CDBQR is functionally equivalent with identical electrical specifications. However, the package width differs (0.154" versus 0.209"), requiring PCB layout verification. If the original footprint cannot accommodate the narrower package, use SN74CBT3245ADBR instead.
Q: What is the difference between 20-SSOP, 20-TSSOP, 20-QSOP, and 20-TVSOP packages? A: All are 20-pin surface mount packages with different physical dimensions. SSOP (Shrink Small Outline Package) and TSSOP (Thin Shrink Small Outline Package) are the most common. QSOP (Quarter-size Small Outline Package) is more compact. TVSOP (Thin Very Small Outline Package) is the thinnest variant. Substitution requires PCB layout compatibility verification.
Q: Why do some substitutes have narrower voltage ranges? A: PI5C3245 series parts from Diodes Incorporated specify 4.75V ~ 5.25V, which is a subset of the original 4V ~ 5.5V range. These parts function correctly within their specified range but are not suitable for applications requiring operation below 4.75V or above 5.25V.
Q: Which substitute has the best long-term availability? A: SN74CBT3245CDBQR maintains Active product status from Texas Instruments, indicating ongoing production and support. All other substitutes carry Last Time Buy or Obsolete designations.
Q: Are all substitutes ROHS3 compliant? A: Yes. All listed substitutes maintain ROHS3 compliance and EAR99 classification, ensuring regulatory consistency with the original part.
Q: What is the significance of MSL (Moisture Sensitivity Level) differences? A: The original CBT3245ADB,112 and most substitutes carry MSL 1 (Unlimited), indicating no moisture sensitivity restrictions. SN74CBT3245ADBQR and SN74CBT3245CDBQR carry MSL 2 (1 Year), requiring storage in controlled humidity conditions and baking before reflow if shelf life exceeds one year.
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