TZ2528C 32.768 kHz Crystal Equivalent & Substitute Parts

Part Overview

The TZ2528C is a 32.768 kHz tuning fork crystal manufactured by TST, designed for real-time clock (RTC) and timing applications requiring precise frequency stability. This surface-mount component operates at a fundamental frequency of 32.768 kHz with a tolerance of ±20ppm and is housed in a compact 2-SMD, No Lead package measuring 2.05mm × 1.20mm. The part is currently in active production status with RoHS3 compliance. Identifying equivalent and substitute parts is essential for supply chain continuity, inventory optimization, and design flexibility across manufacturing environments.

Substiute Parts

TZ2528C

TSTIn Stock: 1121TZ2528C Datasheet

Current PartRFQ

STDMUB1-32.768K

NDK America, Inc.In Stock: 100918STDMUB1-32.768K Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TZ2528C is determined by strict equivalence across all critical electrical and mechanical parameters. The following parameters must match identically for a part to function as a direct substitute:

Electrical Parameters (Non-Negotiable):

• Frequency: 32.768 kHz (exact match required)
• Frequency Tolerance: ±20ppm (exact match required)
• Load Capacitance: 12.5pF (exact match required)
• ESR: 80 kOhms (exact match required)
• Operating Mode: Fundamental (exact match required)

Mechanical Parameters (Non-Negotiable):

• Package Type: 2-SMD, No Lead (exact match required)
• Physical Dimensions: 2.05mm L × 1.20mm W (exact match required)
• Height - Seated (Max): 0.60mm (exact match required)
• Mounting Type: Surface Mount (exact match required)

Environmental Parameters (Non-Negotiable):

• Operating Temperature Range: -40°C to 85°C (must encompass or match exactly)

The STDMUB1-32.768K from NDK America, Inc. meets all substitution criteria and is classified as a parametric equivalent.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection: TZ2528C (TST)

The TZ2528C remains the primary component choice when available. It is in active production status with confirmed inventory of 1092 pieces and carries ROHS3 compliance certification, meeting current regulatory requirements for electronic components.

Substitute Selection: STDMUB1-32.768K (NDK America, Inc.)

The STDMUB1-32.768K is a direct parametric equivalent suitable for substitution when TZ2528C availability is constrained. This part demonstrates:

• Identical electrical specifications across all critical parameters
• Identical mechanical and dimensional specifications
• Active production status with substantial inventory availability (100,872 pieces)
• RoHS compliance certification
• Series designation: NX2012SA

Both components are suitable for applications requiring 32.768 kHz timing references in real-time clock circuits, microcontroller timing modules, and precision timing applications within the specified operating temperature range.

Frequently Asked Questions (FAQ)

Q: Can STDMUB1-32.768K be used as a direct replacement for TZ2528C without circuit modifications?

A: Yes. The STDMUB1-32.768K is a parametric equivalent with identical electrical and mechanical specifications. No circuit modifications are required. The component will function identically in the same PCB footprint and oscillator circuit configuration.

Q: Are there any differences in RoHS compliance between these parts?

A: The TZ2528C carries ROHS3 certification, while the STDMUB1-32.768K carries RoHS compliance. Both meet current regulatory requirements for lead-free and restricted substance compliance. ROHS3 represents the most current standard iteration.

Q: What is the significance of the 80 kOhms ESR specification?

A: The 80 kOhms ESR (Equivalent Series Resistance) is a critical parameter that determines the drive level and power consumption characteristics of the crystal oscillator circuit. Both parts share identical ESR values, ensuring equivalent circuit performance and power requirements.

Q: Can these crystals be used interchangeably in high-precision timing applications?

A: Yes. Both parts specify ±20ppm frequency tolerance and identical load capacitance of 12.5pF. They are suitable for applications requiring this level of timing accuracy. The frequency tolerance specification applies equally to both components.

Q: Are the physical dimensions identical between TZ2528C and STDMUB1-32.768K?

A: Yes. Both components measure 2.05mm length × 1.20mm width with a maximum seated height of 0.60mm. They share identical 2-SMD, No Lead package specifications and will occupy the same PCB footprint.

Q: What is the operating temperature range for both parts?

A: Both the TZ2528C and STDMUB1-32.768K operate across the identical temperature range of -40°C to 85°C, suitable for industrial and commercial applications.

Q: Is the STDMUB1-32.768K part of a specific crystal series?

A: Yes. The STDMUB1-32.768K is designated as part of the NX2012SA series from NDK America, Inc., which encompasses 32.768 kHz tuning fork crystals in compact surface-mount packages.