Equivalent & Substitute Parts for G83270021 32.768 kHz Crystal

Part Overview

The Diodes Incorporated G83270021 is a 32.768 kHz tuning fork crystal with 12.5pF load capacitance, designed for surface mount applications in timing and real-time clock circuits. This part carries an obsolete product status, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. The G83270021 operates across the -40°C to 85°C temperature range with ±20ppm frequency tolerance and 70 kOhms equivalent series resistance.

Key Parameters

Parameter	Value
Frequency	32.768 kHz
Load Capacitance	12.5pF
Frequency Tolerance	±20ppm
ESR (Equivalent Series Resistance)	70 kOhms
Operating Temperature Range	-40°C to 85°C
Package / Case	2-SMD, No Lead
Mounting Type	Surface Mount
Operating Mode	Fundamental
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the G83270021 is determined by strict alignment of electrical and mechanical parameters. The critical substitution criteria are:

Primary Electrical Parameters: Frequency (32.768 kHz), load capacitance (12.5pF), frequency tolerance (±20ppm), and ESR (70 kOhms) must match or remain within compatible operating margins for the host circuit.

Mechanical Parameters: Package type (2-SMD, No Lead), mounting configuration (surface mount), and physical dimensions must accommodate existing PCB layouts.

Environmental & Compliance: Operating temperature range (-40°C to 85°C), RoHS compliance status, and moisture sensitivity level (MSL 1) must be maintained.

Substitute parts are grouped into two categories:

Category A - Direct Electrical & Mechanical Equivalents: Parts matching all primary electrical parameters (32.768 kHz, 12.5pF, ±20ppm, 70 kOhms) with identical or compatible package dimensions.

Category B - Compatible Alternatives: Parts with 32.768 kHz frequency and ±20ppm tolerance but differing load capacitance (9pF or 12pF) or ESR (90 kOhms). These require circuit validation to confirm compatibility with the original design's capacitive loading and impedance characteristics.

Parameter Comparison

Manufacturer	Part Number	Frequency	Load Capacitance	Frequency Tolerance	ESR	Package Dimensions (L x W)	Height (Max)	Product Status
Diodes Incorporated	G83270021	32.768 kHz	12.5pF	±20ppm	70 kOhms	3.20mm x 1.50mm	0.80mm	Obsolete
Diodes Incorporated	G8327A038	32.768 kHz	Not specified	Not specified	Not specified	Not specified	Not specified	Active
Diodes Incorporated	G8327A058	32.768 kHz	12pF	Not specified	70 kOhms	3.20mm x 1.50mm	0.90mm	Active
Micro Crystal	CM7V-T1A-32.768KHZ-12.5PF-20PPM-TA-QC	32.768 kHz	12.5pF	±20ppm	70 kOhms	3.20mm x 1.50mm	0.65mm	Active
TXC CORPORATION	9H03200010	32.768 kHz	9pF	±20ppm	90 kOhms	2.00mm x 1.20mm	0.60mm	Active
TXC CORPORATION	9H03200012	32.768 kHz	12.5pF	±20ppm	90 kOhms	2.00mm x 1.20mm	0.60mm	Active
TXC CORPORATION	9H03200030	32.768 kHz	12.5pF	±20ppm	90 kOhms	1.60mm x 1.00mm	0.50mm	Active
TXC CORPORATION	9H03270022	32.768 kHz	12.5pF	±20ppm	90 kOhms	2.00mm x 1.20mm	0.60mm	Active
TXC CORPORATION	9H03270030	32.768 kHz	12.5pF	±20ppm	90 kOhms	2.00mm x 1.20mm	0.60mm	Active
TXC CORPORATION	9H03270033	32.768 kHz	9pF	±20ppm	90 kOhms	2.00mm x 1.20mm	0.60mm	Active
TXC CORPORATION	9H03270047	32.768 kHz	12.5pF	±20ppm	90 kOhms	1.60mm x 1.00mm	0.50mm	Active

Engineering Selection Recommendations

Primary Substitute - Micro Crystal CM7V-T1A-32.768KHZ-12.5PF-20PPM-TA-QC

This part provides the closest electrical match to the G83270021, with identical frequency (32.768 kHz), load capacitance (12.5pF), frequency tolerance (±20ppm), and ESR (70 kOhms). Physical dimensions are identical (3.20mm x 1.50mm), with a lower seated height (0.65mm vs. 0.80mm), which is compatible with existing PCB layouts. Active product status ensures long-term availability. RoHS3 compliance and MSL 1 rating match the original specification.

Secondary Substitute - Diodes Incorporated G8327A058

This active Diodes part maintains the same manufacturer lineage as the obsolete G83270021. It shares identical frequency (32.768 kHz), ESR (70 kOhms), and package dimensions (3.20mm x 1.50mm). Load capacitance is specified as 12pF, which differs by 0.5pF from the original 12.5pF. This minor variance may be acceptable depending on circuit design margins. Frequency tolerance is not specified in available data. RoHS3 compliance and MSL 1 rating are maintained.

Alternative Substitutes - TXC CORPORATION 9HT11 and 9HT12 Series

TXC parts (9H03200012, 9H03270022, 9H03270030, 9H03270047) provide 32.768 kHz frequency with 12.5pF load capacitance and ±20ppm tolerance. However, ESR is specified as 90 kOhms, which is 20 kOhms higher than the original 70 kOhms specification. This higher impedance may affect circuit oscillation characteristics and startup behavior. Package dimensions are smaller (2.00mm x 1.20mm or 1.60mm x 1.00mm), which may require PCB layout modifications. These parts are suitable only if the original circuit design accommodates the higher ESR value.

Load Capacitance Variants - TXC 9pF Options

TXC parts 9H03200010, 9H03270033 feature 9pF load capacitance instead of 12.5pF. These parts are not direct substitutes and require circuit validation to confirm compatibility with the host oscillator circuit's capacitive loading network.

Frequently Asked Questions (FAQ)

Q: Can I use the TXC 9H03200012 as a direct replacement for the G83270021?

A: The TXC 9H03200012 matches frequency (32.768 kHz), load capacitance (12.5pF), and frequency tolerance (±20ppm). However, ESR is 90 kOhms versus the original 70 kOhms. This 20 kOhms difference may affect oscillator startup time and frequency stability. Circuit validation is required before substitution.

Q: What is the significance of load capacitance in crystal selection?

A: Load capacitance determines the capacitive loading the crystal expects from the oscillator circuit. The G83270021 specifies 12.5pF. Substitutes with different load capacitance values (such as 9pF or 12pF) may require adjustment of the external load capacitors in the oscillator circuit to maintain specified frequency tolerance and stability.

Q: Are all substitute parts RoHS compliant?

A: Yes. The Micro Crystal CM7V-T1A-32.768KHZ-12.5PF-20PPM-TA-QC and Diodes G8327A058 are RoHS3 compliant. TXC parts are RoHS compliant. All listed substitutes meet RoHS requirements.

Q: Does package size affect PCB layout compatibility?

A: Yes. The G83270021 measures 3.20mm x 1.50mm. The Micro Crystal substitute matches these dimensions exactly. TXC alternatives are smaller (2.00mm x 1.20mm or 1.60mm x 1.00mm), which may allow for tighter PCB layouts but may require footprint redesign if the original layout was optimized for the larger package.

Q: What is MSL 1 and why does it matter?

A: MSL (Moisture Sensitivity Level) 1 indicates unlimited shelf life without moisture control requirements. All listed substitutes maintain MSL 1 rating, ensuring no additional moisture handling or baking procedures are necessary during assembly.

Q: Can I substitute a 9pF crystal for the 12.5pF original?

A: No, without circuit modification. The 9pF load capacitance variants (TXC 9H03200010, 9H03270033) require different external load capacitor values in the oscillator circuit. Substitution requires oscillator circuit redesign and frequency stability validation.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message