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CBT3245APW,112 Equivalent & Substitute Parts
Part Overview
The CBT3245APW,112 is an 8x1:1 bus switch logic IC manufactured by Nexperia USA Inc., housed in a 20-pin TSSOP package. This component functions as a high-speed multiplexer for digital signal routing in logic applications. The part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | CBT3245APW,112 |
| Manufacturer | Nexperia USA Inc. |
| Type | Bus Switch |
| Circuit Configuration | 8 x 1:1 |
| Independent Circuits | 1 |
| Voltage Supply | 4V ~ 5.5V (Single Supply) |
| Operating Temperature Range | -40°C ~ 85°C |
| Package / Case | 20-TSSOP (0.173", 4.40mm 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 CBT3245APW,112 is determined by the following critical parameters:
Primary Substitution Criteria:
- Circuit configuration: 8 x 1:1 bus switch topology
- Voltage supply range: 4V ~ 5.5V (or compatible subset)
- Operating temperature: -40°C ~ 85°C
- Mounting type: Surface Mount
- RoHS3 compliance
- MSL rating: 1 (Unlimited) or equivalent
Package Compatibility Considerations: Substitutes are grouped into two categories based on package type:
- TSSOP variants (20-TSSOP, 0.173" width): Direct pin-compatible replacements
- SSOP/QSOP variants (20-SSOP, 20-QSOP): Functionally equivalent but require PCB layout adjustment
Substitutes with voltage supply ranges of 4.75V ~ 5.25V are compatible within the original specification window and do not represent a functional limitation.
Parameter Comparison
| Part Number | Manufacturer | Circuit | Voltage Supply | Operating Temp | Package | MSL | Product Status |
|---|---|---|---|---|---|---|---|
| CBT3245APW,112 | Nexperia USA Inc. | 8 x 1:1 | 4V ~ 5.5V | -40°C ~ 85°C | 20-TSSOP (0.173") | 1 | Obsolete |
| FST3245MTCX | onsemi | 8 x 1:1 | 4V ~ 5.5V | -40°C ~ 85°C | 20-TSSOP (0.173") | 1 | Obsolete |
| PI5C3245LE | Diodes Incorporated | 8 x 1:1 | 4.75V ~ 5.25V | -40°C ~ 85°C | 20-TSSOP (0.173") | 1 | Last Time Buy |
| PI5C3245LEX | Diodes Incorporated | 8 x 1:1 | 4.75V ~ 5.25V | -40°C ~ 85°C | 20-TSSOP (0.173") | 1 | Last Time Buy |
| PI5C3245QEX | Diodes Incorporated | 8 x 1:1 | 4.75V ~ 5.25V | -40°C ~ 85°C | 20-QSOP (0.154") | 1 | Last Time Buy |
| SN74CBT3245ADBQR | Texas Instruments | 8 x 1:1 | 4V ~ 5.5V | -40°C ~ 85°C | 20-SSOP (0.154") | 2 | Last Time Buy |
| SN74CBT3245ADBR | Texas Instruments | 8 x 1:1 | 4V ~ 5.5V | -40°C ~ 85°C | 20-SSOP (0.209") | 1 | Last Time Buy |
| SN74CBT3245ADGVR | Texas Instruments | 8 x 1:1 | 4V ~ 5.5V | -40°C ~ 85°C | 20-TVSOP (0.173") | 1 | Last Time Buy |
| SN74CBT3245APWR | Texas Instruments | 8 x 1:1 | 4V ~ 5.5V | -40°C ~ 85°C | 20-TSSOP (0.173") | 1 | Last Time Buy |
| SN74CBT3245CDBQR | Texas Instruments | 8 x 1:1 | 4V ~ 5.5V | -40°C ~ 85°C | 20-SSOP (0.154") | 2 | Active |
| SN74CBT3245CDBR | Texas Instruments | 8 x 1:1 | 4V ~ 5.5V | -40°C ~ 85°C | 20-SSOP (0.209") | 1 | Active |
Engineering Selection Recommendations
Direct Pin-Compatible Replacements (No PCB Modification Required):
Parts with 20-TSSOP packaging (0.173" width) provide direct footprint compatibility:
- SN74CBT3245APWR (Texas Instruments, Last Time Buy, MSL 1)
- FST3245MTCX (onsemi, Obsolete, MSL 1)
- PI5C3245LE (Diodes Incorporated, Last Time Buy, MSL 1)
- PI5C3245LEX (Diodes Incorporated, Last Time Buy, MSL 1)
Functionally Equivalent Alternatives (PCB Layout Adjustment Required):
Parts with alternative SSOP or QSOP packaging require PCB footprint redesign but maintain full functional equivalence:
- SN74CBT3245CDBQR (Texas Instruments, Active status, 20-SSOP 0.154")
- SN74CBT3245CDBR (Texas Instruments, Active status, 20-SSOP 0.209")
- SN74CBT3245ADBQR (Texas Instruments, Last Time Buy, 20-SSOP 0.154")
- SN74CBT3245ADBR (Texas Instruments, Last Time Buy, 20-SSOP 0.209")
- SN74CBT3245ADGVR (Texas Instruments, Last Time Buy, 20-TVSOP)
- PI5C3245QEX (Diodes Incorporated, Last Time Buy, 20-QSOP)
Recommended Selection Priority:
For new designs or long-term production: SN74CBT3245CDBQR or SN74CBT3245CDBR (Active status, Texas Instruments, full voltage range 4V ~ 5.5V, RoHS3 compliant).
For immediate replacement with minimal redesign: SN74CBT3245APWR (Last Time Buy, Texas Instruments, identical TSSOP package, full voltage range).
All listed substitutes maintain RoHS3 compliance and are suitable for -40°C ~ 85°C operating environments.
Frequently Asked Questions (FAQ)
Q: Can I use PI5C3245LE as a direct replacement for CBT3245APW,112?
A: Yes. Both parts feature 8x1:1 bus switch topology, 20-TSSOP packaging (0.173" width), -40°C ~ 85°C operating range, and MSL 1 rating. The PI5C3245LE voltage supply range (4.75V ~ 5.25V) is a subset of the original specification (4V ~ 5.5V) and does not create functional incompatibility in standard 5V logic applications.
Q: What is the difference between SN74CBT3245CDBQR and SN74CBT3245CDBR?
A: Both are Texas Instruments 8x1:1 bus switches with identical electrical specifications. The primary difference is package width: CDBQR uses 20-SSOP (0.154" width), while CDBR uses 20-SSOP (0.209" width). This affects PCB footprint dimensions but not functional performance. CDBQR is the more compact option.
Q: Why is SN74CBT3245CDBQR recommended over other substitutes?
A: SN74CBT3245CDBQR holds Active product status, indicating ongoing manufacturer support and availability. It maintains the full voltage supply range (4V ~ 5.5V), RoHS3 compliance, and -40°C ~ 85°C operating temperature. Active status provides supply chain stability compared to Last Time Buy or Obsolete alternatives.
Q: Can I use parts with different package types interchangeably?
A: No. Parts with different package designations (TSSOP, SSOP, QSOP, TVSOP) have different physical footprints and pin layouts. Substitution requires PCB redesign and re-layout. Only parts with identical package specifications (e.g., 20-TSSOP 0.173") are pin-compatible without PCB modification.
Q: Are all substitutes RoHS3 compliant?
A: Yes. All listed substitute parts carry RoHS3 Compliant certification, matching the original CBT3245APW,112 specification.
Q: What does MSL 2 (1 Year) mean compared to MSL 1 (Unlimited)?
A: MSL (Moisture Sensitivity Level) indicates the maximum time a component can be stored in standard conditions before requiring baking before reflow soldering. MSL 1 (Unlimited) allows indefinite storage without baking. MSL 2 (1 Year) requires baking if storage exceeds one year. For most applications, this difference is not critical, but MSL 1 parts offer greater handling flexibility.
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