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74ACT16646DL Equivalent & Substitute Parts
Part Overview
The 74ACT16646DL is a non-inverting transceiver logic IC manufactured by Texas Instruments, featuring 2 elements with 8 bits per element and 3-state output capability in a 56-SSOP package. This part is designated as Last Time Buy, indicating end-of-life status. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain flexibility, and support long-term product availability for applications requiring this transceiver functionality.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | 74ACT16646DL |
| Manufacturer | Texas Instruments |
| Series | 74ACT |
| Logic Type | Transceiver, Non-Inverting |
| Number of Elements | 2 |
| Number of Bits per Element | 8 |
| Output Type | 3-State |
| Current - Output High, Low | 24mA, 24mA |
| Voltage - Supply | 4.5V ~ 5.5V |
| Operating Temperature | -40°C ~ 85°C (TA) |
| Package / Case | 56-BSSOP (0.295", 7.50mm Width) |
| Mounting Type | Surface Mount |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
| Product Status | Last Time Buy |
Substitute Part Grouping Explanation
Substitute parts for the 74ACT16646DL are classified based on strict electrical and mechanical parameter alignment. The following criteria determine substitutability:
Primary Substitution Criteria:
- Logic Type: Transceiver, Non-Inverting
- Number of Elements: 2
- Number of Bits per Element: 8
- Output Type: 3-State
- Current - Output High, Low: 24mA, 24mA
- Voltage - Supply: 4.5V ~ 5.5V
- Operating Temperature: -40°C ~ 85°C (TA)
- Package / Case: 56-BSSOP (0.295", 7.50mm Width)
- Mounting Type: Surface Mount
- RoHS Status: ROHS3 Compliant
- Moisture Sensitivity Level (MSL): 1 (Unlimited)
Substitution Categories:
-
Manufacturer Recommended Equivalent (Packaging Variant): 74ACT16646DLR - Identical electrical specifications with Tape & Reel packaging and Active product status.
-
Parametric Equivalents (Same Series - 74ACT): 74ACT16652DL, 74ACT16543DL, 74ACT16651DL - All meet identical electrical and mechanical parameters within the 74ACT series.
-
Parametric Equivalents (Alternative Series - 74FCT): CY74FCT162543CTPVC, CY74FCT162543TPVC, CY74FCT162646ATPVC, CY74FCT162646CTPVC, CY74FCT162652ATPVC, CY74FCT162952BTPVC - Meet identical electrical and mechanical parameters but belong to the 74FCT series with Obsolete product status.
Parameter Comparison
| Part Number | Manufacturer | Series | Logic Type | Elements | Bits/Element | Output Type | I/O Current (mA) | Supply Voltage | Temp Range | Package | Packaging Type | Product Status | RoHS | MSL |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 74ACT16646DL | Texas Instruments | 74ACT | Transceiver, Non-Inverting | 2 | 8 | 3-State | 24/24 | 4.5V ~ 5.5V | -40°C ~ 85°C | 56-BSSOP | Tube | Last Time Buy | ROHS3 | 1 |
| 74ACT16646DLR | Texas Instruments | 74ACT | Transceiver, Non-Inverting | 2 | 8 | 3-State | 24/24 | 4.5V ~ 5.5V | -40°C ~ 85°C | 56-BSSOP | Tape & Reel | Active | ROHS3 | 1 |
| 74ACT16652DL | Texas Instruments | 74ACT | Transceiver, Non-Inverting | 2 | 8 | 3-State | 24/24 | 4.5V ~ 5.5V | -40°C ~ 85°C | 56-BSSOP | Tube | Last Time Buy | ROHS3 | 1 |
| 74ACT16543DL | Texas Instruments | 74ACT | Transceiver, Non-Inverting | 2 | 8 | 3-State | 24/24 | 4.5V ~ 5.5V | -40°C ~ 85°C | 56-BSSOP | Tube | Last Time Buy | ROHS3 | 1 |
| 74ACT16651DL | Texas Instruments | 74ACT | Transceiver, Non-Inverting | 2 | 8 | 3-State | 24/24 | 4.5V ~ 5.5V | -40°C ~ 85°C | 56-BSSOP | Tube | Active | ROHS3 | 1 |
| CY74FCT162543CTPVC | Texas Instruments | 74FCT | Transceiver, Non-Inverting | 2 | 8 | 3-State | 24/24 | 4.5V ~ 5.5V | -40°C ~ 85°C | 56-BSSOP | Tube | Obsolete | ROHS3 | 1 |
| CY74FCT162543TPVC | Texas Instruments | 74FCT | Transceiver, Non-Inverting | 2 | 8 | 3-State | 24/24 | 4.5V ~ 5.5V | -40°C ~ 85°C | 56-BSSOP | Not Specified | Obsolete | ROHS3 | 1 |
| CY74FCT162646ATPVC | Texas Instruments | 74FCT | Transceiver, Non-Inverting | 2 | 8 | 3-State | 24/24 | 4.5V ~ 5.5V | -40°C ~ 85°C | 56-BSSOP | Not Specified | ROHS3 | 1 | |
| CY74FCT162646CTPVC | Texas Instruments | 74FCT | Transceiver, Non-Inverting | 2 | 8 | 3-State | 24/24 | 4.5V ~ 5.5V | -40°C ~ 85°C | 56-BSSOP | Not Specified | ROHS3 | 1 | |
| CY74FCT162652ATPVC | Texas Instruments | 74FCT | Transceiver, Non-Inverting | 2 | 8 | 3-State | 24/24 | 4.5V ~ 5.5V | -40°C ~ 85°C | 56-BSSOP | Not Specified | ROHS3 | 1 | |
| CY74FCT162952BTPVC | Texas Instruments | 74FCT | Transceiver, Non-Inverting | 2 | 8 | 3-State | 24/24 | 4.5V ~ 5.5V | -40°C ~ 85°C | 56-BSSOP | Tube | Obsolete | ROHS3 | 1 |
Engineering Selection Recommendations
Primary Recommendation: 74ACT16646DLR is the manufacturer-recommended equivalent. It maintains identical electrical and mechanical specifications while offering Active product status and Tape & Reel packaging, providing superior long-term availability and supply chain stability compared to the Last Time Buy 74ACT16646DL.
Secondary Recommendations: 74ACT16651DL is an Active product within the 74ACT series, meeting all electrical and mechanical parameters. This part offers continued manufacturer support and availability.
Alternative Selections: 74ACT16652DL and 74ACT16543DL are parametric equivalents within the 74ACT series but carry Last Time Buy status. These parts are suitable for applications where immediate availability is not critical.
Legacy Alternatives: CY74FCT162543CTPVC, CY74FCT162543TPVC, CY74FCT162646ATPVC, CY74FCT162646CTPVC, CY74FCT162652ATPVC, and CY74FCT162952BTPVC are parametric equivalents from the 74FCT series. All are designated Obsolete and should be selected only when 74ACT series alternatives are unavailable. These parts meet identical electrical specifications and package requirements but carry end-of-life status.
All substitute parts maintain ROHS3 compliance and MSL Level 1 (Unlimited) moisture sensitivity rating, ensuring compatibility with standard manufacturing and storage protocols.
Frequently Asked Questions (FAQ)
Q: Can 74ACT16646DLR be used as a direct replacement for 74ACT16646DL? A: Yes. Both parts share identical electrical specifications, output current ratings (24mA), supply voltage range (4.5V ~ 5.5V), operating temperature range (-40°C ~ 85°C), and 56-BSSOP package. The primary difference is packaging format (Tape & Reel versus Tube) and product status (Active versus Last Time Buy). 74ACT16646DLR is the manufacturer-recommended equivalent.
Q: What is the difference between 74ACT and 74FCT series substitutes? A: Both series meet identical electrical and mechanical parameters for this application. The 74ACT series represents current or recently active products, while the 74FCT series parts are designated Obsolete. Selection between series should prioritize availability and supply chain continuity.
Q: Are all substitute parts ROHS3 compliant? A: Yes. All listed substitute parts maintain ROHS3 compliance and MSL Level 1 (Unlimited) rating, ensuring compatibility with standard manufacturing processes and environmental requirements.
Q: Does packaging type affect electrical performance? A: No. Tube and Tape & Reel packaging formats contain identical die and electrical specifications. Packaging selection is driven by manufacturing process requirements, volume needs, and supply chain logistics rather than functional performance.
Q: Why is 74ACT16651DL recommended over other Last Time Buy alternatives? A: 74ACT16651DL carries Active product status, indicating ongoing manufacturer support and availability. While other Last Time Buy parts meet identical specifications, Active status provides superior long-term supply assurance for new designs or production continuity.
Q: Can I substitute a 74FCT part for a 74ACT part in existing designs? A: Electrical substitution is valid based on identical parameters. However, 74FCT series parts are Obsolete. Substitution should occur only when 74ACT alternatives are exhausted, and long-term availability cannot be assured.
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