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SN74CBT3305CPWRG4 Equivalent & Substitute Parts
Part Overview
The SN74CBT3305CPWRG4 is a bus switch logic IC manufactured by Texas Instruments, configured as a 1 x 1:1 circuit in an 8-TSSOP surface mount package. This part is currently discontinued at DiGi Electronics. Finding equivalent and substitute parts is necessary due to its discontinued status and to ensure design flexibility for procurement and long-term supply chain management.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Part Number | SN74CBT3305CPWRG4 |
| Type | Bus Switch |
| Circuit Configuration | 1 x 1:1 |
| Independent Circuits | 2 |
| Package / Case | 8-TSSOP (0.173", 4.40mm Width) |
| Mounting Type | Surface Mount |
| Voltage Supply | 4.5V ~ 5.5V |
| Operating Temperature | -40°C ~ 85°C |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitute parts for the SN74CBT3305CPWRG4 are qualified based on the following criteria:
Electrical Parameters: Voltage supply range (4.5V ~ 5.5V), operating temperature range (-40°C ~ 85°C), circuit configuration (1 x 1:1), and independent circuits count (2).
Mechanical Parameters: Package type (8-TSSOP), mounting type (Surface Mount), and physical dimensions (0.173", 4.40mm Width).
Compliance Parameters: RoHS3 compliance, MSL rating of 1 (Unlimited), and REACH unaffected status.
Substitutes are grouped into two categories:
-
MFR Recommended Substitutes: Parts directly recommended by Texas Instruments as functional replacements with identical electrical and mechanical specifications.
-
Parametric Equivalents: Parts from Texas Instruments and other manufacturers (Diodes Incorporated) that match all critical electrical and mechanical parameters but may differ in product status or packaging format.
Parameter Comparison
| Part Number | Manufacturer | Series | Voltage Supply | Operating Temp | Package | Product Status | Inventory (Pcs) |
|---|---|---|---|---|---|---|---|
| SN74CBT3305CPWRG4 | Texas Instruments | 74CBT | 4.5V ~ 5.5V | -40°C ~ 85°C | 8-TSSOP | Discontinued at DiGi Electronics | 2576 |
| SN74CBT3305CPWR | Texas Instruments | 74CBT | 4.5V ~ 5.5V | -40°C ~ 85°C | 8-TSSOP | Active | 3300 |
| SN74CBT3306CPWR | Texas Instruments | 74CBT | 4.5V ~ 5.5V | -40°C ~ 85°C | 8-TSSOP | Active | 9419 |
| SN74CBT3306PWR | Texas Instruments | 74CBT | 4.5V ~ 5.5V | -40°C ~ 85°C | 8-TSSOP | Last Time Buy | 2300 |
| SN74CBT3306PWRG4 | Texas Instruments | 74CBT | 4.5V ~ 5.5V | -40°C ~ 85°C | 8-TSSOP | Obsolete | 6496 |
| SN74CBTD3305CPWR | Texas Instruments | 74CBTD | 4.5V ~ 5.5V | -40°C ~ 85°C | 8-TSSOP | Active | 3473 |
| SN74CBTD3306CPWR | Texas Instruments | 74CBTD | 4.5V ~ 5.5V | -40°C ~ 85°C | 8-TSSOP | Active | 13216 |
| SN74CBTD3306CPWRG4 | Texas Instruments | 74CBTD | 4.5V ~ 5.5V | -40°C ~ 85°C | 8-TSSOP | Discontinued at DiGi Electronics | 2735 |
| SN74CBTD3306PWR | Texas Instruments | 74CBTD | 4.5V ~ 5.5V | -40°C ~ 85°C | 8-TSSOP | Last Time Buy | 2000 |
| SN74CBTS3306PWR | Texas Instruments | 74CBTS | 4.5V ~ 5.5V | -40°C ~ 85°C | 8-TSSOP | Last Time Buy | 4836 |
| PI5C3305LE | Diodes Incorporated | - | 4V ~ 5.5V | -40°C ~ 85°C | 8-TSSOP | Last Time Buy | 22980 |
Engineering Selection Recommendations
Primary Recommendation: SN74CBT3305CPWR (Texas Instruments, Active Status)
This part is the direct MFR-recommended substitute with identical electrical specifications, matching voltage supply range, operating temperature, and circuit configuration. Active product status ensures long-term availability and supply chain stability. Packaging is Tape & Reel (TR), suitable for automated assembly processes.
Secondary Recommendation: SN74CBTD3306CPWR (Texas Instruments, Active Status)
This parametric equivalent maintains all critical electrical and mechanical parameters. The 74CBTD series variant provides an alternative from the same manufacturer with confirmed active status and highest inventory availability (13,216 pcs). Suitable for applications where series variation is acceptable.
Alternative for High Inventory Requirement: PI5C3305LE (Diodes Incorporated, Last Time Buy)
This part meets all electrical and mechanical substitution criteria with voltage supply range of 4V ~ 5.5V (compatible with the 4.5V ~ 5.5V requirement). Highest inventory availability (22,980 pcs) supports large-volume procurement needs. Product status is Last Time Buy, requiring expedited procurement planning.
Avoid: Parts with Discontinued or Obsolete status (SN74CBT3306PWRG4, SN74CBTD3306CPWRG4) for new designs or long-term production commitments.
Frequently Asked Questions (FAQ)
Q: Can SN74CBT3305CPWR be used as a direct replacement for SN74CBT3305CPWRG4?
A: Yes. Both parts share identical electrical specifications (4.5V ~ 5.5V supply, -40°C ~ 85°C operating range), circuit configuration (1 x 1:1), and package type (8-TSSOP). The primary difference is packaging format: SN74CBT3305CPWR is supplied in Tape & Reel format, while the original is supplied without specified packaging. SN74CBT3305CPWR is the MFR-recommended substitute.
Q: What is the difference between 74CBT, 74CBTD, and 74CBTS series variants?
A: All three series maintain identical electrical parameters (voltage supply, operating temperature, circuit configuration) and package specifications (8-TSSOP). Series designation indicates internal design variants. Selection among these series depends on design requirements and availability. All are parametric equivalents for substitution purposes.
Q: Is PI5C3305LE from Diodes Incorporated compatible with the original part?
A: Yes. PI5C3305LE meets all critical substitution criteria: 1 x 1:1 circuit configuration, 8-TSSOP package, -40°C ~ 85°C operating temperature, and RoHS3 compliance. Voltage supply range is 4V ~ 5.5V, which encompasses the original 4.5V ~ 5.5V specification. This part is suitable for applications where cross-manufacturer substitution is acceptable.
Q: Why should I avoid parts marked as "Last Time Buy"?
A: Last Time Buy status indicates the manufacturer will discontinue production after current inventory is depleted. While these parts are currently available, they are not suitable for designs requiring long-term component availability or future production runs. Use only for legacy system maintenance or short-term projects.
Q: Does packaging format (Tape & Reel vs. Cut Tape) affect electrical compatibility?
A: No. Packaging format affects only procurement and assembly logistics, not electrical performance or compatibility. Both Tape & Reel and Cut Tape formats contain identical components. Selection should be based on manufacturing process requirements and volume needs.
Q: Are all substitute parts RoHS3 compliant?
A: Yes. All listed substitute parts maintain RoHS3 compliance and MSL rating of 1 (Unlimited), matching the original part's environmental and regulatory certifications.
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