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74FCT166244ATPVG Equivalent & Substitute Parts
Part Overview
The 74FCT166244ATPVG is a non-inverting buffer IC manufactured by IDT (Integrated Device Technology Inc) in the 74FCT logic series. This component functions as a 4-element, 4-bit per element buffer with 3-state output capability, housed in a 48-SSOP package. The part is classified as obsolete, making equivalent and substitute parts necessary for ongoing system support and new design implementations where this logic function is required.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | 74FCT166244ATPVG |
| Manufacturer | IDT, Integrated Device Technology Inc |
| 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) |
| Package / Case | 48-BSSOP (0.295", 7.50mm Width) |
| Mounting Type | Surface Mount |
| Product Status | Obsolete |
| RoHS Status | ROHS3 Compliant |
Substitute Part Grouping Explanation
Substitution of the 74FCT166244ATPVG is determined by the following critical parameters that must remain consistent:
- Logic Type: Buffer, Non-Inverting
- Number of Elements: 4
- Number of Bits per Element: 4
- Output Type: 3-State
- Voltage Supply Range: 4.5V ~ 5.5V
- Operating Temperature Range: -40°C ~ 85°C (TA)
- Mounting Type: Surface Mount
- Series: 74FCT
Substitute parts are grouped into two package categories:
Group 1 - 48-BSSOP Package (0.295", 7.50mm Width): Direct mechanical and electrical equivalents with identical package footprint. These parts maintain the same output current specifications as the original or provide enhanced current capability (24mA vs 8mA).
Group 2 - 48-TFSOP Package (0.240", 6.10mm Width): Functionally equivalent parts with different package geometry. These require PCB layout modification but maintain all electrical specifications and operating parameters.
Parameter Comparison
| Part Number | Manufacturer | Logic Type | Elements | Bits/Element | Output Type | Current (mA) | Voltage Supply | Temp Range | Package | Product Status |
|---|---|---|---|---|---|---|---|---|---|---|
| 74FCT166244ATPVG | IDT | Buffer, Non-Inverting | 4 | 4 | 3-State | 8, 8 | 4.5V ~ 5.5V | -40°C ~ 85°C | 48-BSSOP | Obsolete |
| 74FCT162244ATPVCT | Texas Instruments | Buffer, Non-Inverting | 4 | 4 | 3-State | 24, 24 | 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 |
| 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 |
| 74FCT162H244ATPACT | Texas Instruments | Buffer, Non-Inverting | 4 | 4 | 3-State | 24, 24 | 4.5V ~ 5.5V | -40°C ~ 85°C | 48-TFSOP | 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
For Direct Package Replacement (48-BSSOP):
Parts 74FCT162244CTPVCT, CY74FCT162244TPVC, and CY74FCT162244TPVCT are active products from Cypress Semiconductor with identical package geometry to the original 74FCT166244ATPVG. These provide the most straightforward substitution path without PCB modification. All three maintain ROHS3 compliance and operate within the specified voltage and temperature ranges. The enhanced output current (24mA vs 8mA) provides improved drive capability for downstream logic circuits.
For Package-Compatible Alternatives (48-TFSOP):
Parts 74FCT162244ATPACT and 74FCT162244CTPACT from Cypress Semiconductor are active products in the narrower 48-TFSOP package. These require PCB layout modification due to different package footprint dimensions (0.240" vs 0.295" width) but deliver identical electrical functionality and enhanced current output. Both maintain ROHS3 compliance and full operating parameter compatibility.
Obsolete Part Alternatives:
Texas Instruments parts 74FCT162244ATPVCT, CY74FCT162244ATPVC, CY74FCT162244CTPVC, 74FCT162H244ATPACT, and CY74FCT162244TPACT are classified as obsolete. While electrically compatible, these should be considered only when active alternatives are unavailable or for legacy system maintenance where existing inventory exists.
Frequently Asked Questions (FAQ)
Q: Can 74FCT162244 series parts directly replace the 74FCT166244ATPVG?
A: Yes, 74FCT162244 series parts are functionally equivalent. All maintain the same logic type (non-inverting buffer), element count (4 elements, 4 bits per element), output type (3-state), voltage supply range (4.5V ~ 5.5V), and operating temperature range (-40°C ~ 85°C). The primary difference is enhanced output current capability (24mA vs 8mA).
Q: What is the difference between 48-BSSOP and 48-TFSOP packages?
A: Both are surface-mount packages with 48 pins, but differ in physical dimensions. The 48-BSSOP measures 0.295" (7.50mm) in width, while the 48-TFSOP measures 0.240" (6.10mm) in width. The 48-BSSOP is a direct footprint match for the original part; the 48-TFSOP requires PCB layout modification.
Q: Are all substitute parts RoHS compliant?
A: All substitute parts listed maintain ROHS3 compliance, consistent with the original 74FCT166244ATPVG specification.
Q: Which substitute offers the best long-term availability?
A: Cypress Semiconductor parts 74FCT162244CTPVCT, CY74FCT162244TPVC, CY74FCT162244TPVCT, 74FCT162244ATPACT, and 74FCT162244CTPACT are classified as active products, indicating ongoing manufacturing and availability. These are preferred over obsolete alternatives for new designs and long-term system support.
Q: Does the increased output current (24mA vs 8mA) affect circuit compatibility?
A: The increased output current is backward compatible. Circuits designed for 8mA output will function correctly with 24mA-capable parts. The higher current capability provides improved noise margin and faster signal transitions without requiring circuit modifications.
Q: Can I use CY74FCT162244 variants as direct substitutes?
A: Yes, CY74FCT162244 variants (Cypress Semiconductor prefix) are functionally equivalent to 74FCT162244 parts. Both maintain identical electrical specifications, logic function, and package options. The CY prefix indicates Cypress Semiconductor manufacture rather than a functional difference.
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