9HT9-32.768KBZF-T Equivalent & Substitute Parts

Part Overview

The 9HT9-32.768KBZF-T is a 32.768 kHz tuning fork crystal manufactured by TXC CORPORATION, designed for real-time clock (RTC) and timing applications requiring fundamental mode operation. This component features a 12.5pF load capacitance, 65 kOhms equivalent series resistance (ESR), and operates across the -40°C to 85°C temperature range with ±50ppm frequency tolerance.

The 9HT9-32.768KBZF-T is classified as obsolete. Substitute parts are necessary to ensure continued design support, maintain supply chain reliability, and access components with active manufacturing status and improved availability.

Substiute Parts

9HT9-32.768KBZF-T

TXC CORPORATIONIn Stock: 9979HT9-32.768KBZF-T Datasheet

Current PartRFQ

9HT10-32.768KBZC-T

TXC CORPORATIONIn Stock: 136119HT10-32.768KBZC-T Datasheet

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9HT10-32.768KBZF-T

TXC CORPORATIONIn Stock: 24249HT10-32.768KBZF-T Datasheet

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AH-32.768KBZF-T

TXC CORPORATIONIn Stock: 826AH-32.768KBZF-T Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 9HT9-32.768KBZF-T is determined by the following critical parameters:

Mandatory Match Parameters:

• Frequency: 32.768 kHz (exact match required)
• Frequency Tolerance: ±50ppm (substitute must meet or exceed this specification)
• Operating Mode: Fundamental (circuit design dependent)
• Mounting Type: Surface Mount
• Package / Case: 2-SMD, No Lead

Flexible Parameters (within design limits):

• Load Capacitance: 12.5pF (primary specification); 9pF variants acceptable if oscillator circuit supports alternative load capacitance values
• ESR: 65 kOhms (primary); 70 kOhms acceptable within typical oscillator design margins
• Operating Temperature Range: -40°C to 85°C (minimum requirement; extended ranges acceptable)

Preferred Attributes:

• Active product status (ensures ongoing supply and support)
• RoHS compliance (regulatory alignment)
• AEC-Q200 certification (automotive-grade reliability, where applicable)

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: 9HT10-32.768KBZF-T

The 9HT10-32.768KBZF-T is the recommended direct substitute for the obsolete 9HT9-32.768KBZF-T. This part maintains identical electrical specifications (32.768 kHz, ±50ppm, 12.5pF load capacitance) and operating temperature range. The 9HT10 series features active product status, ensuring long-term supply availability. ESR increases from 65 kOhms to 70 kOhms, which remains within acceptable oscillator design margins for standard RTC applications. The component is RoHS compliant and available in Cut Tape and Digi-Reel packaging formats. Physical footprint is reduced (3.20mm x 1.50mm versus 4.10mm x 1.50mm), allowing for more compact PCB layouts while maintaining identical height and mounting compatibility.

Secondary Substitute: AH-32.768KBZF-T

The AH-32.768KBZF-T provides an alternative with identical electrical and thermal specifications to the 9HT10-32.768KBZF-T. This part carries AEC-Q200 automotive-grade certification, making it suitable for applications requiring enhanced reliability standards. The AH series is available in Tape & Reel packaging. Physical dimensions and ESR characteristics match the 9HT10 variant. Selection of this part is appropriate for automotive, industrial, or mission-critical timing applications.

Alternative Substitute: 9HT10-32.768KBZC-T

The 9HT10-32.768KBZC-T is a load capacitance variant (9pF) of the 9HT10 series. This part is suitable only if the oscillator circuit design supports alternative load capacitance values. Direct substitution requires circuit validation to confirm frequency accuracy and startup behavior. ESR and all other parameters remain consistent with the 9HT10-32.768KBZF-T. This variant offers the smallest physical footprint (3.20mm x 1.50mm) and is available in Tape & Reel packaging.

Selection Criteria Summary:

• Standard RTC Applications: Use 9HT10-32.768KBZF-T
• Automotive or High-Reliability Applications: Use AH-32.768KBZF-T
• Alternative Load Capacitance Designs: Use 9HT10-32.768KBZC-T (requires circuit validation)

Frequently Asked Questions (FAQ)

Q: Can the 9HT10-32.768KBZF-T be used as a direct drop-in replacement for the 9HT9-32.768KBZF-T?

A: Yes. Both parts share identical frequency (32.768 kHz), frequency tolerance (±50ppm), load capacitance (12.5pF), and operating temperature range (-40°C to 85°C). The ESR increase from 65 kOhms to 70 kOhms is within typical oscillator design tolerances. The reduced physical footprint (3.20mm x 1.50mm versus 4.10mm x 1.50mm) requires PCB layout verification but does not affect electrical compatibility.

Q: What is the difference between the 9HT10-32.768KBZF-T and 9HT10-32.768KBZC-T?

A: The primary difference is load capacitance: 9HT10-32.768KBZF-T operates at 12.5pF, while 9HT10-32.768KBZC-T operates at 9pF. Load capacitance directly affects oscillator frequency accuracy and startup behavior. Selection depends on oscillator circuit design. If the original design specifies 12.5pF, use the KBZF variant. The 9pF variant (KBZC) requires circuit validation before implementation.

Q: Why does the AH-32.768KBZF-T cost more than the 9HT10-32.768KBZF-T?

A: The AH series carries AEC-Q200 automotive-grade certification, indicating enhanced reliability testing and quality assurance. This certification is required for automotive and mission-critical applications. If AEC-Q200 certification is not required, the 9HT10-32.768KBZF-T provides equivalent electrical performance at lower cost.

Q: Are all substitute parts RoHS compliant?

A: The 9HT10-32.768KBZF-T and 9HT10-32.768KBZC-T are RoHS compliant. The AH-32.768KBZF-T is RoHS compliant. The original 9HT9-32.768KBZF-T RoHS status is not specified in available documentation.

Q: What packaging options are available for each substitute?

A: 9HT10-32.768KBZF-T is available in Cut Tape (CT) and Digi-Reel packaging. 9HT10-32.768KBZC-T is available in Tape & Reel (TR) packaging. AH-32.768KBZF-T is available in Tape & Reel (TR) packaging. Packaging selection depends on assembly process requirements and volume specifications.

Q: Can the 9HT10-32.768KBZC-T (9pF) be used in a circuit designed for 12.5pF load capacitance?

A: Direct substitution is not recommended without circuit validation. Load capacitance affects the oscillator's resonant frequency and startup characteristics. Using a 9pF crystal in a 12.5pF circuit may result in frequency drift or oscillation failure. Circuit redesign or oscillator tuning may be required. Consult oscillator IC documentation and perform frequency accuracy testing before implementation.

Q: What is the moisture sensitivity level (MSL) for all substitute parts?

A: All parts, including the original 9HT9-32.768KBZF-T and all substitutes, have MSL 1 (Unlimited), indicating no moisture sensitivity restrictions during storage or handling.

Q: Are there any size compatibility issues when switching from the 9HT9 to the 9HT10 series?

A: The 9HT10 series has a smaller footprint (3.20mm x 1.50mm) compared to the 9HT9 (4.10mm x 1.50mm). Height remains identical at 0.85mm. PCB layout must be verified to confirm the smaller footprint is compatible with existing pad spacing and component placement. In most cases, the smaller footprint allows for improved layout flexibility without requiring design changes.