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74FCT166244CTPVG8 Equivalent & Substitute Parts
Part Overview
The 74FCT166244CTPVG8 is a non-inverting buffer logic IC manufactured by Renesas Electronics Corporation, featuring 4 elements with 4 bits per element and 3-state output capability. This component is classified as obsolete, which necessitates identification of functionally equivalent alternatives for ongoing design support and procurement continuity. The part operates within the 74FCT logic series and is housed in a 48-SSOP package format.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | 74FCT166244CTPVG8 |
| Manufacturer | Renesas Electronics Corporation |
| Logic Type | Buffer, Non-Inverting |
| Number of Elements | 4 |
| Number of Bits per Element | 4 |
| Output Type | 3-State |
| Current - Output High, Low | 8mA, 8mA |
| Voltage - Supply | 4.5V ~ 5.5V |
| Operating Temperature | -40°C ~ 85°C (TA) |
| Mounting Type | Surface Mount |
| Package / Case | 48-BSSOP (0.295", 7.50mm Width) |
| Product Status | Obsolete |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
| REACH Status | REACH Unaffected |
Substitute Part Grouping Explanation
Substitution eligibility for the 74FCT166244CTPVG8 is determined by the following critical parameters:
Core Functional Parameters:
- Logic Type: Buffer, Non-Inverting
- Number of Elements: 4
- Number of Bits per Element: 4
- Output Type: 3-State
- Voltage - Supply: 4.5V ~ 5.5V
- Operating Temperature: -40°C ~ 85°C (TA)
Package Compatibility Parameters:
- Mounting Type: Surface Mount
- Acceptable Package Formats: 48-BSSOP (0.295", 7.50mm Width) or 48-TFSOP (0.240", 6.10mm Width)
Performance Consideration:
- Output Current: The original part specifies 8mA output current. Substitute parts with 24mA output current provide enhanced drive capability and are functionally compatible for this application category.
All identified substitute parts maintain identical logic functionality, pin count, voltage supply range, and operating temperature specifications. Package variations between 48-BSSOP and 48-TFSOP formats are mechanically compatible within standard PCB assembly processes.
Parameter Comparison
| Manufacturer Part Number | Manufacturer | Logic Type | Elements | Bits/Element | Output Type | Current (mA) | Supply Voltage | Temp Range | Package | Product Status |
|---|---|---|---|---|---|---|---|---|---|---|
| 74FCT166244CTPVG8 | Renesas Electronics | Buffer, Non-Inverting | 4 | 4 | 3-State | 8, 8 | 4.5V ~ 5.5V | -40°C ~ 85°C | 48-BSSOP | Obsolete |
| 74FCT162244ATPACT | Cypress Semiconductor | Buffer, Non-Inverting | 4 | 4 | 3-State | 24, 24 | 4.5V ~ 5.5V | -40°C ~ 85°C | 48-TFSOP | Active |
| 74FCT162244ATPVCT | Texas Instruments | Buffer, Non-Inverting | 4 | 4 | 3-State | 24, 24 | 4.5V ~ 5.5V | -40°C ~ 85°C | 48-BSSOP | Obsolete |
| 74FCT162244CTPACT | Cypress Semiconductor | Buffer, Non-Inverting | 4 | 4 | 3-State | 24, 24 | 4.5V ~ 5.5V | -40°C ~ 85°C | 48-TFSOP | Active |
| 74FCT162244CTPVCT | Cypress Semiconductor | Buffer, Non-Inverting | 4 | 4 | 3-State | 24, 24 | 4.5V ~ 5.5V | -40°C ~ 85°C | 48-BSSOP | Active |
| 74FCT162H244CTPVC | Texas Instruments | Buffer, Non-Inverting | 4 | 4 | 3-State | 24, 24 | 4.5V ~ 5.5V | -40°C ~ 85°C | 48-BSSOP | Obsolete |
| CY74FCT162244ATPVC | Texas Instruments | Buffer, Non-Inverting | 4 | 4 | 3-State | 24, 24 | 4.5V ~ 5.5V | -40°C ~ 85°C | 48-BSSOP | Obsolete |
| CY74FCT162244CTPVC | Texas Instruments | Buffer, Non-Inverting | 4 | 4 | 3-State | 24, 24 | 4.5V ~ 5.5V | -40°C ~ 85°C | 48-BSSOP | Obsolete |
| CY74FCT162244TPACT | Texas Instruments | Buffer, Non-Inverting | 4 | 4 | 3-State | 24, 24 | 4.5V ~ 5.5V | -40°C ~ 85°C | 48-TFSOP | Obsolete |
| CY74FCT162244TPVC | Cypress Semiconductor | Buffer, Non-Inverting | 4 | 4 | 3-State | 24, 24 | 4.5V ~ 5.5V | -40°C ~ 85°C | 48-BSSOP | Active |
| CY74FCT162244TPVCT | Cypress Semiconductor | Buffer, Non-Inverting | 4 | 4 | 3-State | 24, 24 | 4.5V ~ 5.5V | -40°C ~ 85°C | 48-BSSOP | Active |
Engineering Selection Recommendations
Primary Recommendation - Active Status Parts:
For new designs and long-term procurement, select from Cypress Semiconductor active-status alternatives: 74FCT162244ATPACT, 74FCT162244CTPACT, CY74FCT162244TPVC, or CY74FCT162244TPVCT. These parts provide current production availability and ongoing manufacturer support.
Package Selection Guidance:
-
48-BSSOP Package (0.295" width): Maintains identical footprint compatibility with the original 74FCT166244CTPVG8. Select 74FCT162244CTPVCT or CY74FCT162244TPVCT for direct PCB layout compatibility.
-
48-TFSOP Package (0.240" width): Provides a narrower package footprint. Select 74FCT162244ATPACT or 74FCT162244CTPACT for space-constrained applications. PCB layout modification is required.
Output Current Consideration:
The original part specifies 8mA output current. All substitute parts provide 24mA output current, representing a 3x increase in drive capability. This enhanced performance is functionally compatible and does not introduce incompatibility in standard logic applications.
Compliance Status:
All substitute parts maintain REACH Unaffected status and MSL 1 (Unlimited) moisture sensitivity classification, consistent with the original component specifications.
Frequently Asked Questions (FAQ)
Q: Can I use a substitute part with 24mA output current instead of the original 8mA specification?
A: Yes. The 24mA output current in substitute parts provides enhanced drive capability compared to the original 8mA specification. This increased current capacity is functionally compatible with standard 74FCT logic applications and does not create incompatibility issues.
Q: What is the difference between 48-BSSOP and 48-TFSOP packages?
A: Both packages contain 48 pins and are surface-mount formats. The 48-BSSOP package has a 0.295" width, while the 48-TFSOP package has a 0.240" width. The narrower TFSOP format requires PCB layout modification but provides space savings. Pin assignments and electrical function remain identical.
Q: Are obsolete-status substitute parts acceptable for new designs?
A: Obsolete-status parts carry procurement risk due to limited remaining inventory and no ongoing manufacturer support. For new designs, prioritize active-status alternatives from Cypress Semiconductor (74FCT162244ATPACT, 74FCT162244CTPACT, CY74FCT162244TPVC, CY74FCT162244TPVCT) to ensure long-term availability and design continuity.
Q: Do all substitute parts operate within the same voltage and temperature range?
A: Yes. All substitute parts maintain the identical supply voltage range of 4.5V to 5.5V and operating temperature range of -40°C to 85°C (TA), ensuring direct functional compatibility in existing circuit designs.
Q: Which substitute part provides the best long-term availability?
A: Cypress Semiconductor active-status parts (74FCT162244ATPACT, 74FCT162244CTPACT, CY74FCT162244TPVC, CY74FCT162244TPVCT) offer current production status with the highest inventory levels and ongoing manufacturer support, making them the preferred choice for designs requiring extended component lifecycle.
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