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PI5C3244QE Equivalent & Substitute Parts
Part Overview
The PI5C3244QE is a bus switch IC manufactured by Diodes Incorporated, configured as a 4 x 1:1 logic switch in a 20-QSOP package. This component functions as a multiplexer for digital signal routing in logic applications. The part is currently obsolete, making equivalent and substitute parts necessary for ongoing design support, maintenance, and new production requirements. Substitute parts maintain functional equivalence through identical circuit configuration, electrical specifications, and compatible packaging options.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | PI5C3244QE |
| Manufacturer | Diodes Incorporated |
| Type | Bus Switch |
| Circuit Configuration | 4 x 1:1 |
| Independent Circuits | 2 |
| Voltage Supply Source | Single Supply |
| Voltage - Supply Range | 4.75V ~ 5.25V |
| Operating Temperature Range | -40°C ~ 85°C |
| Mounting Type | Surface Mount |
| Package / Case | 20-SSOP (0.154", 3.90mm Width) |
| Supplier Device Package | 20-QSOP |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
| Product Status | Obsolete |
Substitute Part Grouping Explanation
Substitution of the PI5C3244QE is determined by strict equivalence across the following critical parameters:
Functional Requirements:
- Circuit type: Bus Switch
- Circuit configuration: 4 x 1:1
- Independent circuits: 2
- Voltage supply source: Single Supply
Electrical Compatibility:
- Voltage supply range must overlap or encompass the original specification (4.75V ~ 5.25V)
- Operating temperature range: -40°C ~ 85°C
Physical & Manufacturing Requirements:
- Mounting type: Surface Mount
- Package compatibility: 20-QSOP, 20-SSOP, or 20-TVSOP/20-TSSOP variants
- RoHS3 compliance required
- MSL rating acceptable for storage and handling
Substitute parts are grouped by package type and product status. Active parts are preferred for new designs; Last Time Buy and Obsolete parts are suitable for legacy system support and maintenance.
Parameter Comparison
| Part Number | Manufacturer | Circuit Config | Voltage Supply | Temp Range | Package Type | Product Status | RoHS3 | MSL |
|---|---|---|---|---|---|---|---|---|
| PI5C3244QE | Diodes Inc. | 4 x 1:1 | 4.75V ~ 5.25V | -40°C ~ 85°C | 20-QSOP | Obsolete | Yes | 1 |
| QS3244QG8 | Renesas Electronics | 4 x 1:1 | 4.75V ~ 5.25V | -40°C ~ 85°C | 20-QSOP | Active | Yes | 1 |
| SN74CBT3244CDBQR | Texas Instruments | 4 x 1:1 | 4V ~ 5.5V | -40°C ~ 85°C | 20-SSOP | Active | Yes | 2 |
| SN74CBT3244CDGVR | Texas Instruments | 4 x 1:1 | 4V ~ 5.5V | -40°C ~ 85°C | 20-TVSOP | Active | Yes | 1 |
| SN74CBT3244CPW | Texas Instruments | 4 x 1:1 | 4V ~ 5.5V | -40°C ~ 85°C | 20-TSSOP | Active | Yes | 1 |
| SN74CBT3244CPWR | Texas Instruments | 4 x 1:1 | 4V ~ 5.5V | -40°C ~ 85°C | 20-TSSOP | Active | Yes | 1 |
| SN74CBT3244DBQR | Texas Instruments | 4 x 1:1 | 4.5V ~ 5.5V | -40°C ~ 85°C | 20-SSOP | Last Time Buy | Yes | 2 |
| SN74CBT3244DBR | Texas Instruments | 4 x 1:1 | 4.5V ~ 5.5V | -40°C ~ 85°C | 20-SSOP | Last Time Buy | Yes | 1 |
| SN74CBT3244DGVR | Texas Instruments | 4 x 1:1 | 4.5V ~ 5.5V | -40°C ~ 85°C | 20-TVSOP | Last Time Buy | Yes | 1 |
| SN74CBT3244PW | Texas Instruments | 4 x 1:1 | 4.5V ~ 5.5V | -40°C ~ 85°C | 20-TSSOP | Last Time Buy | Yes | 1 |
| SN74CBT3244PWR | Texas Instruments | 4 x 1:1 | 4.5V ~ 5.5V | -40°C ~ 85°C | 20-TSSOP | Obsolete | Yes | 1 |
Engineering Selection Recommendations
For New Designs: Select QS3244QG8 (Renesas Electronics) or SN74CBT3244CDBQR / SN74CBT3244CDGVR / SN74CBT3244CPW / SN74CBT3244CPWR (Texas Instruments). These parts carry Active product status, ensuring long-term availability and manufacturing support. QS3244QG8 provides the closest electrical match to the original PI5C3244QE with identical voltage supply range (4.75V ~ 5.25V) and MSL rating. Texas Instruments parts offer broader voltage tolerance (4V ~ 5.5V) and multiple package options.
For Legacy System Support: SN74CBT3244DBQR, SN74CBT3244DBR, SN74CBT3244DGVR, SN74CBT3244PW, and SN74CBT3244PWR are available with Last Time Buy or Obsolete status. These remain suitable for maintenance and repair applications where existing PCB layouts and supply chain constraints require compatibility with the original package footprint.
Package Selection Considerations:
- 20-QSOP (QS3244QG8): Maintains original package footprint; recommended for direct replacement
- 20-SSOP (SN74CBT3244CDBQR, SN74CBT3244DBQR, SN74CBT3244DBR): Compact footprint; verify PCB layout compatibility
- 20-TVSOP (SN74CBT3244CDGVR, SN74CBT3244DGVR): Thin profile; suitable for space-constrained applications
- 20-TSSOP (SN74CBT3244CPW, SN74CBT3244CPWR, SN74CBT3244PW, SN74CBT3244PWR): Standard thin shrink package; widely supported in manufacturing
All substitute parts maintain RoHS3 compliance and are suitable for applications requiring environmental and regulatory adherence.
Frequently Asked Questions (FAQ)
Q: Can QS3244QG8 be used as a direct replacement for PI5C3244QE? A: Yes. QS3244QG8 maintains identical circuit configuration (4 x 1:1), voltage supply range (4.75V ~ 5.25V), operating temperature range (-40°C ~ 85°C), and package type (20-QSOP). It is the preferred substitute for direct PCB replacement.
Q: What is the difference between Active and Last Time Buy product status? A: Active parts are in full production with guaranteed long-term availability. Last Time Buy parts are no longer manufactured but remain available from existing inventory; these are suitable for maintenance and legacy system support but not recommended for new designs. Obsolete parts have reached end-of-life and availability is limited.
Q: Are Texas Instruments SN74CBT3244 variants compatible with the PI5C3244QE? A: Yes, all SN74CBT3244 variants are functionally equivalent. They maintain the 4 x 1:1 circuit configuration and -40°C ~ 85°C operating range. Texas Instruments parts offer broader voltage tolerance (4V ~ 5.5V vs. 4.75V ~ 5.25V) and are available in multiple package options. Verify PCB footprint compatibility before selection.
Q: What does MSL rating mean, and why does it vary? A: Moisture Sensitivity Level (MSL) indicates the component's sensitivity to moisture absorption during storage and handling. MSL 1 (Unlimited) allows indefinite storage without special precautions. MSL 2 (1 Year) requires controlled storage conditions and has a one-year shelf life from the date of manufacture. Both ratings are acceptable; MSL 1 offers greater handling flexibility.
Q: Can I use SN74CBT3244PWR (Obsolete) in a new design? A: No. Obsolete parts should not be used in new designs due to limited availability and no manufacturing support. Use Active status parts (QS3244QG8 or active SN74CBT3244 variants) for new production.
Q: What is the difference between 20-QSOP and 20-SSOP packages? A: Both are 20-pin surface mount packages with similar pin pitch. 20-QSOP (0.154", 3.90mm width) and 20-SSOP (0.154", 3.90mm width) are mechanically compatible. However, some 20-SSOP variants (such as SN74CBT3244DBR at 0.209", 5.30mm width) have different body widths. Verify exact package dimensions against PCB footprint requirements.
Q: Are all substitute parts RoHS3 compliant? A: Yes. All listed substitute parts carry RoHS3 compliance certification, meeting environmental and regulatory requirements for lead-free manufacturing and restricted substance limits.
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