PI74FCT16245ATVEX Equivalent & Substitute Parts

Part Overview

The PI74FCT16245ATVEX is a non-inverting transceiver logic IC manufactured by Diodes Incorporated, featuring 2 elements with 8 bits per element and 3-state output capability. Designed for 5.5V operation in a 48-SSOP package, this component is classified as obsolete. Due to its discontinued status, identifying functionally equivalent substitute parts from active manufacturers ensures design continuity and supply chain reliability for applications requiring this transceiver topology.

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-BSSOP (0.295", 7.50mm Width)
Series	74FCT

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict alignment with the following electrical and mechanical parameters:

Critical Matching 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 Considerations: Substitute parts are grouped into two package categories: 48-BSSOP (0.295", 7.50mm Width) and 48-TFSOP (0.240", 6.10mm Width). Both packages are surface-mount compatible and mechanically interchangeable in most PCB layouts, though pin pitch and body width differ slightly.

Output Current Variations: The main part specifies 32mA (High) and 64mA (Low) output current. Some substitutes specify 24mA (High) and 24mA (Low). These variations remain within the 74FCT logic family specifications and are functionally compatible for standard transceiver applications.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Product Status	Package / Case	Current - Output High, Low	Inventory (Pcs)
PI74FCT16245ATVEX	Diodes Incorporated	Obsolete	48-BSSOP (0.295", 7.50mm)	32mA, 64mA	1007
74FCT16245ATPVG	IDT	Active	48-BSSOP (0.295", 7.50mm)	32mA, 64mA	1310
74FCT162245ATPACT	Texas Instruments	Obsolete	48-TFSOP (0.240", 6.10mm)	24mA, 24mA	3200
74FCT162245ATPAG	Renesas Electronics	Obsolete	48-TFSOP (0.240", 6.10mm)	24mA, 24mA	1114
74FCT162245ATPVCT	Cypress Semiconductor	Active	48-BSSOP (0.295", 7.50mm)	24mA, 24mA	2060
74FCT162245ATPVG	Renesas Electronics	Obsolete	48-BSSOP (0.295", 7.50mm)	24mA, 24mA	1214
74FCT162245CTPACT	Texas Instruments	Obsolete	48-TFSOP (0.240", 6.10mm)	24mA, 24mA	873
74FCT162245CTPAG	IDT	Active	48-TFSOP (0.240", 6.10mm)	24mA, 24mA	2527
74FCT162245CTPAG8	IDT	Active	48-TFSOP (0.240", 6.10mm)	24mA, 24mA	2175
74FCT16245ATPAG	IDT	Active	48-TFSOP (0.240", 6.10mm)	32mA, 64mA	6679
74FCT16245ATPAG8	Renesas Electronics	Active	48-TFSOP (0.240", 6.10mm)	32mA, 64mA	6497

Engineering Selection Recommendations

For Direct Package Compatibility (48-BSSOP): The 74FCT16245ATPVG (IDT, Active status) provides the closest electrical match with identical output current specifications (32mA, 64mA) and maintains the original 48-BSSOP package footprint. Active product status ensures ongoing availability and manufacturer support.

For Active Product Status with Package Flexibility: The 74FCT16245ATPAG (IDT, Active) and 74FCT16245ATPAG8 (Renesas, Active) both maintain the original output current specifications (32mA, 64mA) and active product status. These parts use the 48-TFSOP package, which requires PCB layout verification due to reduced body width (0.240" vs. 0.295").

For Maximum Inventory Availability: The 74FCT16245ATPAG (IDT) offers the highest inventory level (6679 pcs) with active status and matching output current specifications, supporting high-volume production requirements.

For RoHS3 Compliance: All active substitute parts listed maintain ROHS3 compliance and REACH unaffected status, consistent with the original part's regulatory certifications.

Frequently Asked Questions (FAQ)

Q: Can I substitute the PI74FCT16245ATVEX with any 74FCT16245 variant? A: No. Substitutes must maintain the 2-element, 8-bit-per-element, non-inverting transceiver topology with 3-state output and 4.5V–5.5V supply voltage. Output current specifications (32mA/64mA vs. 24mA/24mA) and package type (48-BSSOP vs. 48-TFSOP) are secondary considerations but must be evaluated against your circuit requirements.

Q: What is the difference between 48-BSSOP and 48-TFSOP packages? A: Both are 48-pin surface-mount packages. The 48-BSSOP has a body width of 0.295" (7.50mm), while the 48-TFSOP has a body width of 0.240" (6.10mm). Pin pitch and electrical characteristics are identical. PCB layout and footprint compatibility must be verified before substitution.

Q: Are parts with 24mA output current compatible with designs requiring 32mA/64mA? A: Output current specifications define the maximum current the IC can source or sink. Parts rated at 24mA/24mA will operate in circuits designed for 32mA/64mA, but may not meet performance requirements if the application demands the higher current capability. Circuit analysis is required.

Q: Why should I choose an active product over an obsolete substitute? A: Active products ensure long-term availability, manufacturer support, and continued compliance certifications. Obsolete parts carry supply risk and may become unavailable without notice.

Q: Are all listed substitutes ROHS3 compliant? A: All active substitutes (74FCT16245ATPVG, 74FCT162245ATPVCT, 74FCT162245CTPAG, 74FCT162245CTPAG8, 74FCT16245ATPAG, 74FCT16245ATPAG8) maintain ROHS3 compliance and REACH unaffected status.

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