74F125PC Equivalent & Substitute Parts

Part Overview

The 74F125PC is a non-inverting buffer logic integrated circuit manufactured by onsemi, featuring 4 elements with 1 bit per element and 3-state output capability. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement. The 74F125PC operates within a 4.5V to 5.5V supply voltage range and is housed in a 14-DIP through-hole package. Identifying compatible alternatives ensures design continuity and component availability for applications requiring this buffer functionality.

Key Parameters

Parameter	Specification
Logic Type	Buffer, Non-Inverting
Number of Elements	4
Number of Bits per Element	1
Output Type	3-State
Current - Output High, Low	15mA, 64mA
Voltage - Supply	4.5V ~ 5.5V
Operating Temperature	0°C ~ 70°C (TA)
Mounting Type	Through Hole
Package / Case	14-DIP (0.300", 7.62mm)

Substitute Part Grouping Explanation

Substitute parts for the 74F125PC are qualified based on strict electrical and mechanical parameter matching. All substitute candidates maintain identical specifications across the following critical parameters: logic type (Buffer, Non-Inverting), element count (4), bits per element (1), output type (3-State), output current ratings (15mA high, 64mA low), supply voltage range (4.5V ~ 5.5V), operating temperature range (0°C ~ 70°C), mounting type (Through Hole), and package form factor (14-DIP, 0.300" pitch, 7.62mm).

Substitutes are grouped into two categories:

Direct Manufacturer Equivalent: SN74F125N maintains the identical 74F series designation and all electrical parameters, differing only in packaging format (Tube vs. standard) and product status (Active vs. Obsolete).

Parametric Equivalents: SN74BCT125AN, SN74BCT126AN, and SN74F126N share all critical electrical and mechanical parameters with the 74F125PC. These parts operate identically within the specified parameter ranges, with variations limited to series designation (74BCT vs. 74F) and product lifecycle status.

Parameter Comparison

Parameter	74F125PC (onsemi)	SN74F125N (TI)	SN74BCT125AN (TI)	SN74BCT126AN (TI)	SN74F126N (TI)
Logic Type	Buffer, Non-Inverting	Buffer, Non-Inverting	Buffer, Non-Inverting	Buffer, Non-Inverting	Buffer, Non-Inverting
Number of Elements	4	4	4	4	4
Number of Bits per Element	1	1	1	1	1
Output Type	3-State	3-State	3-State	3-State	3-State
Current - Output High, Low	15mA, 64mA	15mA, 64mA	15mA, 64mA	15mA, 64mA	15mA, 64mA
Voltage - Supply	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V
Operating Temperature	0°C ~ 70°C	0°C ~ 70°C	0°C ~ 70°C	0°C ~ 70°C	0°C ~ 70°C
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	14-DIP (0.300", 7.62mm)	14-DIP (0.300", 7.62mm)	14-DIP (0.300", 7.62mm)	14-DIP (0.300", 7.62mm)	14-DIP (0.300", 7.62mm)
Product Status	Obsolete	Active	Active	Discontinued at DiGi Electronics	Active
RoHS Status	Not specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

For applications currently using the 74F125PC, SN74F125N is the primary substitute choice. This part is manufactured by Texas Instruments, maintains active product status, and carries ROHS3 compliance certification. The SN74F125N is electrically and mechanically identical to the 74F125PC, with the primary distinction being packaging format and current availability.

SN74F126N serves as an alternative active substitute within the 74F series. This part maintains all critical electrical parameters and offers the highest current inventory level (5400 pcs), providing supply chain stability.

SN74BCT125AN represents a parametric equivalent from the 74BCT series, offering active product status and ROHS3 compliance. The 74BCT series provides functionally equivalent performance within the specified parameter envelope.

SN74BCT126AN is classified as discontinued at DiGi Electronics and should be considered only when other active alternatives are unavailable. While electrically and mechanically compatible, its discontinued status limits long-term procurement viability.

Frequently Asked Questions (FAQ)

Q: Can SN74F125N directly replace 74F125PC in existing designs? A: Yes. SN74F125N is a direct equivalent with identical electrical specifications, output current ratings, supply voltage range, operating temperature, and 14-DIP package form factor. No circuit modifications are required.

Q: What is the difference between 74F and 74BCT series substitutes? A: Both series maintain identical electrical parameters for this application: 4-element non-inverting buffers with 3-state outputs, 15mA/64mA output current, and 4.5V to 5.5V supply voltage operation. The series designation reflects internal circuit architecture differences that do not affect functional compatibility within the specified parameter range.

Q: Are all substitute parts RoHS compliant? A: SN74F125N, SN74BCT125AN, and SN74F126N are ROHS3 compliant. SN74BCT126AN is also ROHS3 compliant. The original 74F125PC RoHS status is not specified in available documentation.

Q: Does package format differ between substitutes? A: All parts use 14-DIP through-hole packaging with 0.300" (7.62mm) pitch. Packaging format variations (Tube vs. standard) relate to supplier delivery method only and do not affect electrical or mechanical compatibility.

Q: Which substitute offers the best supply availability? A: SN74F126N currently has the highest inventory level at 5400 pcs. SN74BCT125AN offers 3505 pcs, and SN74F125N provides 2200 pcs. Inventory levels are subject to change based on current market conditions.

Q: Can I use SN74BCT126AN as a substitute? A: SN74BCT126AN is electrically and mechanically compatible with all specified parameters. However, its discontinued status at DiGi Electronics may limit future procurement options. Active alternatives such as SN74F125N or SN74F126N are preferred for new designs.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message