PI74FCT16245ATAEX Equivalent & Substitute Parts

Part Overview

The PI74FCT16245ATAEX is a non-inverting transceiver logic IC manufactured by Diodes Incorporated, featuring 2 elements with 8 bits per element and 3-state output capability. This 48-TSSOP surface mount device operates across a 4.5V to 5.5V supply voltage range and is rated for -40°C to 85°C operating temperature. The part is currently obsolete, making equivalent substitutes necessary for ongoing system support and new designs requiring compatible functionality.

Key Parameters

Parameter	Value
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)
Mounting Type	Surface Mount
Package / Case	48-TFSOP (0.240", 6.10mm Width)
Series	74FCT

Substitute Part Grouping Explanation

Substitution eligibility for the PI74FCT16245ATAEX is determined by the following critical parameters:

Primary Substitution Criteria:

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)
Mounting Type: Surface Mount
Base Product Number: 74FCT16245 or 74FCT162245

Secondary Compatibility Factors:

Package / Case: 48-TFSOP or 48-BSSOP (both acceptable for 48-pin TSSOP/SSOP footprints)
Current - Output High, Low: Must meet or exceed 32mA/64mA specifications

Substitute parts are grouped into two categories based on output current specifications: parts maintaining the original 32mA/64mA output current (direct equivalents) and parts with reduced 24mA/24mA output current (functional alternatives requiring application verification).

Parameter Comparison

Part Number	Manufacturer	Logic Type	Elements	Bits/Element	Output Type	Current High/Low (mA)	Supply Voltage	Temp Range	Package	Status
PI74FCT16245ATAEX	Diodes Incorporated	Transceiver, Non-Inverting	2	8	3-State	32/64	4.5V ~ 5.5V	-40°C ~ 85°C	48-TFSOP	Obsolete
74FCT16245ATPAG	IDT	Transceiver, Non-Inverting	2	8	3-State	32/64	4.5V ~ 5.5V	-40°C ~ 85°C	48-TFSOP	Active
74FCT162245ATPACT	Texas Instruments	Transceiver, Non-Inverting	2	8	3-State	24/24	4.5V ~ 5.5V	-40°C ~ 85°C	48-TFSOP	Obsolete
74FCT162245ATPAG	Renesas Electronics	Transceiver, Non-Inverting	2	8	3-State	24/24	4.5V ~ 5.5V	-40°C ~ 85°C	48-TFSOP	Obsolete
74FCT162245ATPVCT	Cypress Semiconductor	Transceiver, Non-Inverting	2	8	3-State	24/24	4.5V ~ 5.5V	-40°C ~ 85°C	48-BSSOP	Active
74FCT162245ATPVG	Renesas Electronics	Transceiver, Non-Inverting	2	8	3-State	24/24	4.5V ~ 5.5V	-40°C ~ 85°C	48-BSSOP	Obsolete
74FCT162245CTPACT	Texas Instruments	Transceiver, Non-Inverting	2	8	3-State	24/24	4.5V ~ 5.5V	-40°C ~ 85°C	48-TFSOP	Obsolete
74FCT162245CTPAG	IDT	Transceiver, Non-Inverting	2	8	3-State	24/24	4.5V ~ 5.5V	-40°C ~ 85°C	48-TFSOP	Active
74FCT162245CTPAG8	IDT	Transceiver, Non-Inverting	2	8	3-State	24/24	4.5V ~ 5.5V	-40°C ~ 85°C	48-TFSOP	Active
74FCT16245ATPVG	IDT	Transceiver, Non-Inverting	2	8	3-State	32/64	4.5V ~ 5.5V	-40°C ~ 85°C	48-BSSOP	Active
74FCT16245CTPAG	Renesas Electronics	Transceiver, Non-Inverting	2	8	3-State	32/64	4.5V ~ 5.5V	-40°C ~ 85°C	48-TFSOP	Active

Engineering Selection Recommendations

Direct Equivalent (Matching Output Current Specifications):

The 74FCT16245ATPAG (IDT, Active status) provides the most direct substitution with identical 32mA/64mA output current specifications and 48-TFSOP packaging. This part maintains full electrical compatibility with the original PI74FCT16245ATAEX and is currently in active production status, ensuring long-term availability.

The 74FCT16245ATPVG (IDT, Active status) offers equivalent electrical performance with 32mA/64mA output current but uses 48-BSSOP packaging (0.295" width versus 0.240" width). This part is suitable for applications where package footprint differences are accommodated in PCB layout.

The 74FCT16245CTPAG (Renesas Electronics, Active status) provides identical electrical specifications and 48-TFSOP packaging with active product status, supporting long-term design continuity.

Functional Alternatives (Reduced Output Current):

Parts with 24mA/24mA output current (74FCT162245 series) are functionally compatible for applications where reduced output drive capability is acceptable. These include:

74FCT162245CTPAG (IDT, Active status, 48-TFSOP)
74FCT162245CTPAG8 (IDT, Active status, 48-TFSOP)
74FCT162245ATPVCT (Cypress Semiconductor, Active status, 48-BSSOP)

All substitute parts maintain identical supply voltage range (4.5V ~ 5.5V), operating temperature range (-40°C ~ 85°C), and core transceiver functionality. Selection should prioritize active status parts for new designs and long-term production support.

Frequently Asked Questions (FAQ)

Q: Can I use a 74FCT162245 series part as a direct replacement for the PI74FCT16245ATAEX?

A: The 74FCT162245 series parts are functionally compatible but feature reduced output current specifications (24mA/24mA versus 32mA/64mA). These parts are suitable only if your application does not require the higher output drive current of the original device. Verify load impedance and signal integrity requirements before substitution.

Q: What is the difference between 48-TFSOP and 48-BSSOP packaging?

A: Both are 48-pin surface mount packages with different body widths. The 48-TFSOP is 0.240" (6.10mm) wide, while the 48-BSSOP is 0.295" (7.50mm) wide. These packages have different PCB footprints and cannot be used interchangeably without layout modification. Verify your PCB design accommodates the selected package before implementation.

Q: Why is the PI74FCT16245ATAEX marked as obsolete?

A: The original part is obsolete, but multiple active equivalent parts are available from manufacturers including IDT, Renesas Electronics, and Cypress Semiconductor. These active parts provide identical or compatible functionality and ensure continued supply for new designs and production support.

Q: Are all substitute parts RoHS3 compliant?

A: Not all substitute parts explicitly list RoHS3 compliance in the provided specifications. Verify compliance requirements for your specific application and confirm with the selected manufacturer or distributor before procurement.

Q: What should I consider when selecting between parts with different output current ratings?

A: Output current capability determines the maximum load that can be driven by each output pin. The original PI74FCT16245ATAEX supports 32mA high and 64mA low output current. If your circuit design relies on this drive capability, select substitute parts with matching or higher current ratings. If your loads are lighter, reduced current parts may be acceptable but require circuit analysis to confirm.

Q: Can I mix different substitute parts in the same design?

A: All substitute parts maintain identical logic functionality, supply voltage, and operating temperature specifications. However, output current differences between 32mA/64mA and 24mA/24mA variants should be consistent across a design to avoid unpredictable signal integrity issues. Use a single part number throughout a design unless load analysis specifically supports mixed usage.

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