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74FCT162646CTPVCG4 Equivalent & Substitute Parts
Part Overview
The 74FCT162646CTPVCG4 is a non-inverting transceiver logic integrated circuit manufactured by Texas Instruments. This device functions as a 2-element, 8-bit per element transceiver with 3-state output capability, housed in a 56-SSOP surface mount package. The part operates within a 4.5V to 5.5V supply voltage range and is rated for -40°C to 85°C operating temperature.
The 74FCT162646CTPVCG4 is currently discontinued at DiGi Electronics. Locating equivalent substitute parts is necessary to maintain design continuity and ensure component availability for production and repair applications. Substitute parts must maintain identical electrical specifications, output characteristics, and physical packaging to ensure direct replacement capability.
Substiute Parts
Key Parameters
| Parameter | Specification |
|---|---|
| Logic Type | Transceiver, Non-Inverting |
| Number of Elements | 2 |
| Number of Bits per Element | 8 |
| Output Type | 3-State |
| Current - Output High | 24mA |
| Current - Output Low | 24mA |
| Voltage - Supply | 4.5V ~ 5.5V |
| Operating Temperature | -40°C ~ 85°C (TA) |
| Mounting Type | Surface Mount |
| Package / Case | 56-BSSOP (0.295", 7.50mm Width) |
| Supplier Device Package | 56-SSOP |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
| REACH Status | REACH Unaffected |
Substitute Part Grouping Explanation
Substitute parts for the 74FCT162646CTPVCG4 are qualified based on strict parametric equivalence across the following critical criteria:
Electrical Equivalence Requirements:
- 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)
Mechanical Equivalence Requirements:
- Mounting Type: Surface Mount
- Package / Case: 56-BSSOP (0.295", 7.50mm Width)
- Supplier Device Package: 56-SSOP
Compliance Requirements:
- RoHS Status: ROHS3 Compliant
- Moisture Sensitivity Level (MSL): 1 (Unlimited)
- REACH Status: REACH Unaffected
All substitute parts listed meet these criteria without exception. Substitution is valid only when all parameters match exactly as specified above.
Parameter Comparison
| Part Number | Manufacturer | Series | Logic Type | Elements | Bits/Element | Output Type | I(out) High/Low | V Supply | Temp Range | Package | Product Status | Inventory |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 74FCT162646CTPVCG4 | Texas Instruments | 74FCT | Transceiver, Non-Inverting | 2 | 8 | 3-State | 24mA, 24mA | 4.5V ~ 5.5V | -40°C ~ 85°C | 56-BSSOP | Discontinued | 690 Pcs |
| 74ACT16652DL | Texas Instruments | 74ACT | Transceiver, Non-Inverting | 2 | 8 | 3-State | 24mA, 24mA | 4.5V ~ 5.5V | -40°C ~ 85°C | 56-BSSOP | Last Time Buy | 1048 Pcs |
| 74ACT16543DL | Texas Instruments | 74ACT | Transceiver, Non-Inverting | 2 | 8 | 3-State | 24mA, 24mA | 4.5V ~ 5.5V | -40°C ~ 85°C | 56-BSSOP | Last Time Buy | 1332 Pcs |
| 74ACT16646DL | Texas Instruments | 74ACT | Transceiver, Non-Inverting | 2 | 8 | 3-State | 24mA, 24mA | 4.5V ~ 5.5V | -40°C ~ 85°C | 56-BSSOP | Last Time Buy | 4802 Pcs |
| 74ACT16651DL | Texas Instruments | 74ACT | Transceiver, Non-Inverting | 2 | 8 | 3-State | 24mA, 24mA | 4.5V ~ 5.5V | -40°C ~ 85°C | 56-BSSOP | Active | 1048 Pcs |
| CY74FCT162543CTPVC | Texas Instruments | 74FCT | Transceiver, Non-Inverting | 2 | 8 | 3-State | 24mA, 24mA | 4.5V ~ 5.5V | -40°C ~ 85°C | 56-BSSOP | Obsolete | 821 Pcs |
| CY74FCT162543TPVC | Texas Instruments | 74FCT | Transceiver, Non-Inverting | 2 | 8 | 3-State | 24mA, 24mA | 4.5V ~ 5.5V | -40°C ~ 85°C | 56-BSSOP | Obsolete | 839 Pcs |
| CY74FCT162646ATPVC | Texas Instruments | 74FCT | Transceiver, Non-Inverting | 2 | 8 | 3-State | 24mA, 24mA | 4.5V ~ 5.5V | -40°C ~ 85°C | 56-BSSOP | Obsolete | 1202 Pcs |
| CY74FCT162646CTPVC | Texas Instruments | 74FCT | Transceiver, Non-Inverting | 2 | 8 | 3-State | 24mA, 24mA | 4.5V ~ 5.5V | -40°C ~ 85°C | 56-BSSOP | Obsolete | 1247 Pcs |
| CY74FCT162652ATPVC | Texas Instruments | 74FCT | Transceiver, Non-Inverting | 2 | 8 | 3-State | 24mA, 24mA | 4.5V ~ 5.5V | -40°C ~ 85°C | 56-BSSOP | Obsolete | 1095 Pcs |
| CY74FCT162952BTPVC | Texas Instruments | 74FCT | Transceiver, Non-Inverting | 2 | 8 | 3-State | 24mA, 24mA | 4.5V ~ 5.5V | -40°C ~ 85°C | 56-BSSOP | Obsolete | 1103 Pcs |
Engineering Selection Recommendations
Primary Recommendation: 74ACT16651DL
The 74ACT16651DL is the preferred substitute for the 74FCT162646CTPVCG4. This part maintains full parametric equivalence across all electrical and mechanical specifications. The 74ACT16651DL carries Active product status, ensuring long-term availability and continued manufacturing support. Current inventory of 1048 units provides immediate procurement capability. This part is ROHS3 compliant, REACH unaffected, and maintains MSL Level 1 rating identical to the original part.
Secondary Recommendations: 74ACT16646DL and 74ACT16652DL
The 74ACT16646DL and 74ACT16652DL are functionally equivalent alternatives. The 74ACT16646DL offers the highest inventory availability at 4802 units. Both parts carry Last Time Buy status, indicating limited future availability. These parts maintain full electrical and mechanical equivalence with identical compliance certifications.
Alternative Options: 74ACT16543DL
The 74ACT16543DL provides an additional substitute option with 1332 units in stock and Last Time Buy status. This part meets all parametric requirements for direct substitution.
Obsolete Series Alternatives: CY74FCT Series
Parts from the CY74FCT series (CY74FCT162543CTPVC, CY74FCT162543TPVC, CY74FCT162646ATPVC, CY74FCT162646CTPVC, CY74FCT162652ATPVC, CY74FCT162952BTPVC) are classified as Obsolete. These parts maintain full parametric equivalence but carry Obsolete product status. Selection of these parts should be limited to applications where existing inventory must be utilized or where design continuity with legacy systems is required.
Compliance Verification
All substitute parts listed are ROHS3 compliant, REACH unaffected, and carry MSL Level 1 rating. No additional environmental or regulatory considerations apply to substitution decisions.
Frequently Asked Questions (FAQ)
Q: Can the 74ACT16651DL directly replace the 74FCT162646CTPVCG4 without circuit modification?
A: Yes. The 74ACT16651DL maintains identical electrical specifications including supply voltage range (4.5V ~ 5.5V), output current ratings (24mA high and low), operating temperature range (-40°C ~ 85°C), and logic function (2-element, 8-bit per element, non-inverting transceiver with 3-state output). The 56-BSSOP package is mechanically identical. No circuit modifications are required.
Q: What is the difference between 74FCT and 74ACT series parts?
A: Both series are non-inverting transceiver logic families manufactured by Texas Instruments. The 74FCT series represents the original design, while the 74ACT series represents an alternative implementation. All parts listed maintain identical electrical parameters and are functionally interchangeable based on the specifications provided.
Q: Why is the 74ACT16651DL recommended over other substitutes?
A: The 74ACT16651DL carries Active product status, indicating ongoing manufacturing and long-term availability. Other 74ACT alternatives carry Last Time Buy status, indicating limited future production. The 74ACT16651DL provides the best assurance of continued component availability for future production runs and repairs.
Q: Are there any packaging differences between substitute parts?
A: All substitute parts use the 56-BSSOP (0.295", 7.50mm Width) surface mount package. Mechanical compatibility is guaranteed across all listed substitutes. Pin-to-pin compatibility is maintained for direct board-level replacement.
Q: What does "Last Time Buy" status mean?
A: Last Time Buy status indicates that the manufacturer has announced the end of production for that part number. Existing inventory may be available, but no new production runs are planned. Parts with this status should be selected only when inventory availability is confirmed and long-term supply is not critical.
Q: Can obsolete CY74FCT series parts be used as substitutes?
A: Yes, obsolete CY74FCT series parts maintain full parametric equivalence and are electrically and mechanically compatible. However, these parts carry Obsolete status, indicating no further manufacturing or support. Selection should be limited to applications where existing inventory is available or where design continuity with legacy systems is required.
Q: What compliance certifications apply to all substitute parts?
A: All substitute parts are ROHS3 compliant, REACH unaffected, and carry Moisture Sensitivity Level (MSL) 1 rating (Unlimited). These certifications match the original 74FCT162646CTPVCG4 part and ensure compatibility with current manufacturing and environmental standards.
Q: Is inventory availability a factor in substitution decisions?
A: Inventory availability is a practical consideration for procurement planning but does not affect electrical or mechanical compatibility. The 74ACT16646DL offers the highest inventory at 4802 units. However, Active status of the 74ACT16651DL provides better long-term supply assurance despite lower current inventory levels.
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