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74FCT16543ATPVG Equivalent & Substitute Parts
Part Overview
The 74FCT16543ATPVG is a non-inverting transceiver logic IC manufactured by Renesas Electronics Corporation, featuring 2 elements with 8 bits per element and 3-state output capability. Housed in a 56-BSSOP package, this component operates across a 4.5V to 5.5V supply range with an operating temperature range of -40°C to 85°C. The part is classified as obsolete, necessitating identification of functionally equivalent alternatives for ongoing design support and procurement continuity.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | 74FCT16543ATPVG |
| Manufacturer | Renesas Electronics Corporation |
| Logic Type | Transceiver, Non-Inverting |
| Number of Elements | 2 |
| Number of Bits per Element | 8 |
| Output Type | 3-State |
| Current - Output High, Low | 32mA, 64mA |
| Voltage - Supply | 4.5V ~ 5.5V |
| Operating Temperature | -40°C ~ 85°C (TA) |
| Package / Case | 56-BSSOP (0.295", 7.50mm Width) |
| Product Status | Obsolete |
| RoHS Status | RoHS non-compliant |
| Moisture Sensitivity Level (MSL) | 3 (168 Hours) |
Substitute Part Grouping Explanation
Substitution of the 74FCT16543ATPVG is determined by strict alignment of the following electrical and mechanical parameters:
Critical Substitution Parameters:
- Logic Type: Transceiver, Non-Inverting
- Number of Elements: 2
- Number of Bits per Element: 8
- Output Type: 3-State
- Voltage - Supply: 4.5V ~ 5.5V
- Operating Temperature: -40°C ~ 85°C (TA)
- Series: 74FCT
Package Compatibility:
- Primary: 56-BSSOP (0.295", 7.50mm Width) — direct mechanical and electrical compatibility
- Secondary: 56-TFSOP (0.240", 6.10mm Width) — functionally equivalent with different form factor
Current Output Specifications:
- Original part: 32mA (High), 64mA (Low)
- Substitute parts with matching current ratings: Direct electrical equivalents
- Substitute parts with reduced current ratings (24mA, 24mA): Parametric equivalents suitable where output current requirements do not exceed specified limits
Substitutes are categorized as:
- MFR Recommended — Texas Instruments parts with identical or superior electrical characteristics and improved compliance status
- Parametric Equivalent — Parts meeting all functional requirements with matching or reduced output current capabilities
Parameter Comparison
| Part Number | Manufacturer | Logic Type | Elements | Bits/Element | Output Type | Current High/Low (mA) | Supply Voltage | Temp Range (°C) | Package | RoHS Status | MSL |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 74FCT16543ATPVG | Renesas | Transceiver, Non-Inverting | 2 | 8 | 3-State | 32/64 | 4.5-5.5V | -40 to 85 | 56-BSSOP | Non-compliant | 3 |
| 74FCT162543ATPACT | Texas Instruments | Transceiver, Non-Inverting | 2 | 8 | 3-State | 24/24 | 4.5-5.5V | -40 to 85 | 56-TFSOP | ROHS3 Compliant | 1 |
| CY74FCT162543CTPVC | Texas Instruments | Transceiver, Non-Inverting | 2 | 8 | 3-State | 24/24 | 4.5-5.5V | -40 to 85 | 56-BSSOP | ROHS3 Compliant | 1 |
| CY74FCT162543TPVC | Texas Instruments | Transceiver, Non-Inverting | 2 | 8 | 3-State | 24/24 | 4.5-5.5V | -40 to 85 | 56-BSSOP | ROHS3 Compliant | 1 |
| CY74FCT162543TPVCT | Texas Instruments | Transceiver, Non-Inverting | 2 | 8 | 3-State | 24/24 | 4.5-5.5V | -40 to 85 | 56-BSSOP | ROHS3 Compliant | 1 |
| CY74FCT16543ATPACT | Texas Instruments | Transceiver, Non-Inverting | 2 | 8 | 3-State | 32/64 | 4.5-5.5V | -40 to 85 | 56-TFSOP | ROHS3 Compliant | 1 |
| CY74FCT16543CTPVCT | Texas Instruments | Transceiver, Non-Inverting | 2 | 8 | 3-State | 32/64 | 4.5-5.5V | -40 to 85 | 56-BSSOP | ROHS3 Compliant | 1 |
| CY74FCT16543CTPVC | Texas Instruments | Transceiver, Non-Inverting | 2 | 8 | 3-State | 32/64 | 4.5-5.5V | -40 to 85 | 56-BSSOP | ROHS3 Compliant | 1 |
| CY74FCT16646ATPVC | Texas Instruments | Transceiver, Non-Inverting | 2 | 8 | 3-State | 32/64 | 4.5-5.5V | -40 to 85 | 56-BSSOP | ROHS3 Compliant | 1 |
| CY74FCT16646CTPVC | Texas Instruments | Transceiver, Non-Inverting | 2 | 8 | 3-State | 32/64 | 4.5-5.5V | -40 to 85 | 56-BSSOP | ROHS3 Compliant | 1 |
| CY74FCT16652ATPVC | Texas Instruments | Transceiver, Non-Inverting | 2 | 8 | 3-State | 32/64 | 4.5-5.5V | -40 to 85 | 56-BSSOP | ROHS3 Compliant | 1 |
Engineering Selection Recommendations
For Direct Replacement (Same Package, Same Current Output):
Select CY74FCT16543CTPVC or CY74FCT16543CTPVCT when 56-BSSOP package and 32mA/64mA output current are required. Both parts are ROHS3 compliant with MSL 1 rating, providing superior moisture handling compared to the original part's MSL 3 specification.
For Package Form Factor Flexibility:
CY74FCT16543ATPACT offers 56-TFSOP packaging with matching 32mA/64mA output current specifications. This option accommodates space-constrained layouts while maintaining electrical equivalence.
For Reduced Output Current Applications:
CY74FCT162543CTPVC, CY74FCT162543TPVC, and CY74FCT162543TPVCT provide 24mA/24mA output current in 56-BSSOP packaging. These parts are suitable for applications where output current requirements do not exceed 24mA. All three are ROHS3 compliant with MSL 1 rating.
Compliance Advantage:
All recommended substitutes transition from RoHS non-compliant status to ROHS3 compliant status, with improved moisture sensitivity levels (MSL 1 vs. MSL 3). This addresses regulatory requirements and enhances reliability in humid storage and operational environments.
Frequently Asked Questions (FAQ)
Q: Can CY74FCT162543CTPVC replace 74FCT16543ATPVG directly?
A: CY74FCT162543CTPVC is electrically compatible in all functional parameters (logic type, element count, bit width, output type, supply voltage, temperature range). However, output current is reduced from 32mA/64mA to 24mA/24mA. Direct replacement is valid only if circuit design does not require output currents exceeding 24mA.
Q: What is the difference between 56-BSSOP and 56-TFSOP packages?
A: Both are surface-mount packages with 56 pins. The 56-BSSOP measures 0.295" (7.50mm) width, while 56-TFSOP measures 0.240" (6.10mm) width. Electrical functionality is identical; package selection depends on PCB layout constraints and available footprint space.
Q: Why do some substitutes have lower output current ratings?
A: CY74FCT162543 series parts specify 24mA/24mA output current versus the original 32mA/64mA. These are parametric equivalents suitable for applications where output current demands remain within the lower specification. Circuit analysis must confirm compatibility before selection.
Q: Are all recommended substitutes RoHS compliant?
A: Yes. All Texas Instruments substitutes listed are ROHS3 compliant, whereas the original 74FCT16543ATPVG is RoHS non-compliant. This compliance improvement supports modern procurement and environmental regulations.
Q: What does MSL 1 versus MSL 3 mean for component handling?
A: MSL (Moisture Sensitivity Level) 1 indicates unlimited shelf life without moisture control. MSL 3 requires controlled storage with maximum 168-hour exposure to ambient conditions before reflow. Substitutes with MSL 1 reduce handling complexity and storage costs.
Q: Can I use CY74FCT16646ATPVC or CY74FCT16652ATPVC as substitutes?
A: These parts are parametric equivalents with identical electrical specifications (32mA/64mA output, 56-BSSOP package, ROHS3 compliant, MSL 1). They differ in base product number (74FCT16646 and 74FCT16652 versus 74FCT16543), indicating different internal logic configurations. Use only if functional logic requirements align with these alternative part numbers.
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