TC9401EJD Equivalent & Substitute Parts

Part Overview

The TC9401EJD is a Volt to Frequency and Frequency to Volt Converter IC manufactured by Microchip Technology, designed for 100 kHz operation with ±0.02% linearity. This component is classified as obsolete, making substitute parts necessary for new designs and ongoing production requirements. The TC9401EJD operates in Through Hole mounting configuration with a 14-CDIP package format.

Substiute Parts

TC9401EJD

Microchip TechnologyIn Stock: 1207TC9401EJD Datasheet

Current PartRFQ

TC9400CPD

Microchip TechnologyIn Stock: 1550TC9400CPD Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TC9401EJD is determined by the following critical parameters:

• Frequency maximum rating: 100 kHz
• Converter type: Volt to Frequency and Frequency to Volt
• Mounting configuration: Through Hole
• Package footprint: 14-pin DIP format with 0.300" (7.62mm) spacing
• Temperature stability: ±40 ppm/°C full scale
• Regulatory compliance: ROHS3 and REACH requirements

The TC9400CPD qualifies as a substitute based on matching these core electrical and mechanical specifications. Both parts maintain identical frequency operation, temperature coefficient, mounting type, and pin spacing. Linearity specifications differ between the parts but remain within acceptable tolerance ranges for V/F and F/V conversion applications.

Parameter Comparison

Engineering Selection Recommendations

The TC9400CPD is the primary substitute for the obsolete TC9401EJD. Both parts are manufactured by Microchip Technology and maintain identical electrical performance specifications for frequency operation and temperature stability. The TC9400CPD holds Active product status, ensuring continued availability and manufacturing support.

Both components satisfy ROHS3 and REACH compliance requirements. The TC9400CPD is supplied in standard Tube packaging, whereas the TC9401EJD packaging format is not specified in available data. Pin configuration and footprint compatibility are maintained across both parts, supporting direct board-level substitution in Through Hole applications.

The linearity specification difference (±0.02% versus ±0.05%) reflects the distinction between CERDIP and PDIP package technologies. Selection between these parts should be based on application linearity requirements and package availability constraints.

Frequently Asked Questions (FAQ)

Q: Can TC9400CPD directly replace TC9401EJD in existing designs?

A: Yes. Both parts share identical pin counts (14-pin), spacing (0.300" / 7.62mm), frequency ratings (100 kHz), and temperature coefficients (±40 ppm/°C). Through Hole mounting compatibility is maintained. The primary difference is linearity specification and package technology (CERDIP versus PDIP).

Q: What is the significance of the linearity difference between these parts?

A: TC9401EJD specifies ±0.02% linearity while TC9400CPD specifies ±0.05% linearity. Both values define the accuracy of voltage-to-frequency and frequency-to-voltage conversion. Application requirements determine whether the ±0.05% specification of the TC9400CPD is acceptable for your circuit.

Q: Why is TC9401EJD marked as obsolete?

A: Obsolete status indicates that Microchip Technology has discontinued manufacturing this part. The TC9400CPD, maintained in Active status, represents the current production alternative for V/F and F/V conversion applications requiring 100 kHz operation.

Q: Are there package compatibility concerns between CERDIP and PDIP formats?

A: Both CERDIP and PDIP formats maintain the same 14-pin DIP footprint with 0.300" spacing. Board-level compatibility is preserved. PDIP (plastic DIP) is the standard Through Hole package format for current production parts.

Q: Do both parts meet current regulatory requirements?

A: Yes. Both TC9401EJD and TC9400CPD are ROHS3 Compliant and REACH Unaffected, satisfying current environmental and regulatory standards for electronic components.