TE Connectivity 1-390261-9 DIP Socket 28-Position Equivalent & Substitute Parts

Part Overview

The TE Connectivity 1-390261-9 is a 28-position DIP socket with 0.3" (7.62mm) row spacing, tin-plated phosphor bronze contacts, and through-hole solder termination. This component is classified as obsolete, necessitating identification of active equivalent and substitute parts for ongoing design and procurement requirements. The socket accommodates standard 28-pin DIP integrated circuits with 0.100" (2.54mm) pitch contact spacing.

Key Parameters

Parameter	Value
Number of Positions	28 (2 x 14)
Row Spacing	0.3" (7.62mm)
Pitch - Mating	0.100" (2.54mm)
Contact Finish - Mating	Tin
Contact Material - Mating	Phosphor Bronze
Mounting Type	Through Hole
Termination	Solder
Operating Temperature Range	-40°C ~ 105°C
Contact Resistance	30mOhm
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the TE Connectivity 1-390261-9 is determined by the following critical parameters: 28-position pin count, 0.100" (2.54mm) mating pitch, through-hole mounting type, and solder termination. The row spacing of 0.3" (7.62mm) is a primary mechanical constraint for PCB layout compatibility.

Substitute parts are grouped into two categories:

Direct Equivalents (Identical Row Spacing - 0.3"): Parts maintaining the 0.3" (7.62mm) row spacing with tin contact finish and through-hole mounting. These parts are mechanically and electrically interchangeable with the original component for PCB designs utilizing standard 28-pin DIP footprints.

Functional Alternatives (Different Row Spacing - 0.6"): Parts with modified row spacing that accommodate the same 28-pin DIP package but require PCB footprint adjustment. These are suitable only for new designs or PCB revisions.

All substitute parts listed maintain ROHS3 compliance, 0.100" (2.54mm) mating pitch, and solder termination as specified in the original component.

Parameter Comparison

Parameter	1-390261-9 (Main)	1-2199298-9 (TE Connectivity)	ED281DT (On Shore)	ICS-328-T (Adam Tech)	BU280Z-178-HT (On Shore)
Manufacturer	TE Connectivity	TE Connectivity	On Shore Technology	Adam Tech	On Shore Technology
Product Status	Obsolete	Active	Active	Active	Active
Number of Positions	28 (2 x 14)	28 (2 x 14)	28 (2 x 14)	28 (2 x 14)	28 (2 x 14)
Row Spacing	0.3" (7.62mm)	0.3" (7.62mm)	0.3" (7.62mm)	0.3" (7.62mm)	0.6" (15.24mm)
Pitch - Mating	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)
Contact Finish - Mating	Tin	Tin	Tin	Tin	Gold
Contact Material - Mating	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Phosphor Bronze	Beryllium Copper
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Surface Mount
Termination	Solder	Solder	Solder	Solder	Solder
Operating Temperature Range	-40°C ~ 105°C	-40°C ~ 105°C	-55°C ~ 110°C	-55°C ~ 105°C	-55°C ~ 125°C
Contact Resistance	30mOhm	20mOhm	20mOhm	20mOhm	7mOhm
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

For Direct PCB Replacement (0.3" Row Spacing Required):

The TE Connectivity 1-2199298-9 is the primary direct equivalent. This part maintains identical mechanical and electrical specifications with the original 1-390261-9, including 0.3" (7.62mm) row spacing, tin contact finish, and through-hole mounting. The 1-2199298-9 is active in production with established supply availability and carries ROHS3 compliance certification. Contact resistance is improved at 20mOhm compared to the original 30mOhm specification.

The On Shore Technology ED281DT and Adam Tech ICS-328-T are functionally equivalent alternatives with identical row spacing and mounting configuration. Both parts are active in production status and ROHS3 compliant. The ED281DT provides extended operating temperature range (-55°C ~ 110°C) and improved contact resistance (20mOhm). The ICS-328-T offers the highest inventory availability among active substitutes and maintains the same operating temperature floor as the original part (-40°C minimum).

For New Designs with Modified Footprint (0.6" Row Spacing):

The On Shore Technology BU280Z-178-HT accommodates the same 28-pin DIP package with modified 0.6" (15.24mm) row spacing and surface-mount termination. This part is suitable only for new PCB designs or existing designs undergoing footprint revision. The BU280Z-178-HT features gold contact finish, beryllium copper contact material, and superior contact resistance (7mOhm). Extended operating temperature range (-55°C ~ 125°C) and ROHS3 compliance are provided.

All recommended substitutes maintain ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1), consistent with the original component's environmental specifications.

Frequently Asked Questions (FAQ)

Q: Can the 1-2199298-9 be used as a direct replacement for the 1-390261-9 in existing PCB designs?

A: Yes. The 1-2199298-9 maintains identical row spacing (0.3"), mating pitch (0.100"), mounting type (through-hole), and termination method (solder). No PCB modification is required for substitution.

Q: What is the primary difference between the ED281DT and ICS-328-T substitutes?

A: Both parts share identical mechanical specifications (0.3" row spacing, through-hole mounting) and contact material (phosphor bronze with tin finish). The ED281DT provides extended upper operating temperature limit (110°C vs. 105°C). The ICS-328-T offers higher inventory availability and slightly longer termination post length (0.124" vs. unspecified for ED281DT).

Q: Why is the BU280Z-178-HT listed as a functional alternative rather than a direct equivalent?

A: The BU280Z-178-HT uses 0.6" (15.24mm) row spacing compared to the original 0.3" (7.62mm) specification. This dimensional difference requires PCB footprint modification and is not suitable for direct replacement in existing designs. Additionally, this part uses surface-mount termination rather than through-hole, requiring different assembly processes.

Q: Are all listed substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed (1-2199298-9, ED281DT, ICS-328-T, and BU280Z-178-HT) carry ROHS3 compliance certification, matching the environmental compliance status of the original 1-390261-9.

Q: What is the significance of contact resistance differences among the substitute parts?

A: Contact resistance values (ranging from 7mOhm to 30mOhm) indicate electrical performance characteristics. Lower contact resistance values (7mOhm for BU280Z-178-HT, 20mOhm for 1-2199298-9, ED281DT, and ICS-328-T) provide improved signal integrity and reduced voltage drop compared to the original 30mOhm specification. All values remain within acceptable ranges for standard DIP socket applications.

Q: Can the 1-2199298-9 be used in applications requiring the full -40°C to 105°C temperature range of the original part?

A: Yes. The 1-2199298-9 maintains the identical operating temperature range (-40°C ~ 105°C) as the original 1-390261-9. The ED281DT and ICS-328-T provide extended lower temperature capability (-55°C minimum) and are suitable for applications requiring the original temperature specification.

Q: What packaging format is used for the substitute parts?

A: All substitute parts are supplied in tube packaging, consistent with standard DIP socket distribution methods. The original 1-390261-9 packaging format is not specified in available documentation.

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