Equivalent & Substitute Parts for TXC CORPORATION 9B08070005

Part Overview

The TXC CORPORATION 9B08070005 is an 8 MHz through-hole crystal oscillator designed for fundamental mode operation. This component features a 22pF load capacitance, 80 Ohms equivalent series resistance, and operates across the -40°C to 85°C temperature range with ±30ppm frequency stability. The part is classified as obsolete, making identification of compatible substitute components essential for ongoing system support and new design implementations.

Substiute Parts

9B08070005

TXC CORPORATIONIn Stock: 10389B08070005 Datasheet

Current PartRFQ

HC49US-FF5F18-8.000MHZ

ILSIIn Stock: 1523HC49US-FF5F18-8.000MHZ Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 9B08070005 is determined by the following critical parameters:

Mandatory Matching Parameters:

• Frequency: 8 MHz
• Operating Mode: Fundamental
• Package / Case: HC-49/US
• Mounting Type: Through Hole
• Operating Temperature Range: -40°C to 85°C
• ESR: 80 Ohms

Allowable Variation Parameters:

• Load Capacitance: The substitute part HC49US-FF5F18-8.000MHZ operates at 18pF load capacitance, which differs from the main part's 22pF specification. This variation is within acceptable substitution criteria for crystal oscillators when circuit design accommodates the load capacitance difference.

The substitute part HC49US-FF5F18-8.000MHZ from ILSI meets all mandatory matching criteria and maintains electrical compatibility through identical frequency, stability, ESR, operating mode, temperature range, and package configuration.

Parameter Comparison

Engineering Selection Recommendations

The ILSI HC49US-FF5F18-8.000MHZ serves as a direct substitute for the obsolete TXC 9B08070005 based on the following engineering criteria:

Product Status Alignment: The substitute part maintains active product status, ensuring continued availability and supply chain reliability compared to the obsolete main part.

Compliance Certification: Both components maintain ROHS3 compliance, supporting environmental and regulatory requirements for electronic component deployment.

Electrical Compatibility: Identical frequency (8 MHz), frequency stability (±30ppm), ESR (80 Ohms), and operating temperature range (-40°C to 85°C) ensure functional equivalence in circuit applications.

Physical Compatibility: Both components utilize the HC-49/US package with through-hole mounting, enabling direct mechanical and electrical integration into existing PCB designs without layout modifications.

Load Capacitance Consideration: The substitute part operates at 18pF load capacitance versus the main part's 22pF. Circuit designs must accommodate this 4pF difference through appropriate load network adjustment or confirmation that the application circuit design supports variable load capacitance within this range.

Frequently Asked Questions (FAQ)

Q: Can the ILSI HC49US-FF5F18-8.000MHZ directly replace the TXC 9B08070005 without circuit modifications?

A: Direct replacement is possible for applications where the circuit design accommodates load capacitance variation between 18pF and 22pF. If the original circuit was specifically tuned for 22pF load capacitance, load network adjustment may be required.

Q: What is the significance of the load capacitance difference between 22pF and 18pF?

A: Load capacitance affects the crystal's operating frequency within its specified tolerance band. The ±30ppm stability specification for both parts encompasses this variation range. Circuit designers must confirm that the application's frequency tolerance requirements are met with the 18pF load capacitance.

Q: Are both parts physically identical in the HC-49/US package?

A: Both components use the HC-49/US package with through-hole mounting. Physical dimensions show minor variations: the main part measures 0.453" L x 0.197" W (11.50mm x 5.00mm) with 0.145" height, while the substitute measures 0.437" L x 0.185" W (11.10mm x 4.70mm) with 0.138" height. These dimensional differences remain within HC-49/US package specifications and do not affect PCB mounting compatibility.

Q: Why is the substitute part listed as active while the main part is obsolete?

A: The TXC 9B08070005 has been discontinued by the manufacturer. The ILSI HC49US-FF5F18-8.000MHZ remains in active production, providing long-term supply availability for applications requiring 8 MHz fundamental mode crystals in HC-49/US packaging.

Q: Are there any compliance differences between the two parts?

A: Both components are ROHS3 compliant. The main part is REACH Affected, while the substitute is REACH Unaffected. Both carry EAR99 ECCN classification and identical HTSUS codes (8541.60.0050).