G53270004 32.768 kHz Crystal Equivalent & Substitute Parts

Part Overview

The Diodes Incorporated G53270004 is a 32.768 kHz tuning fork crystal in 4-SMD flat lead package with 12.5pF load capacitance and 65 kOhms ESR. This part is discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives from active manufacturers. Substitute parts must maintain identical electrical specifications and mechanical compatibility to ensure direct board-level replacement without circuit redesign.

Key Parameters

Parameter	Value
Frequency	32.768 kHz
Frequency Tolerance	±20ppm
Load Capacitance	12.5pF
ESR (Equivalent Series Resistance)	65 kOhms
Operating Mode	Fundamental
Operating Temperature Range	-40°C to 85°C
Package / Case	4-SMD, Flat Leads
Mounting Type	Surface Mount
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution is determined by strict equivalence across electrical and mechanical parameters. The primary substitution criteria are:

Critical Parameters (Must Match Exactly):

Frequency: 32.768 kHz
Frequency Tolerance: ±20ppm
Load Capacitance: 12.5pF
ESR: 65 kOhms
Operating Temperature: -40°C to 85°C
Package: 4-SMD, Flat Leads
Mounting: Surface Mount

Secondary Considerations:

Physical dimensions (length, width, height)
RoHS compliance status
Moisture sensitivity level
Product status (active vs. discontinued)

Substitute parts are grouped into two categories:

Group 1 - Direct Electrical Equivalents (12.5pF Load Capacitance):

TXC CORPORATION 9H03200413
TXC CORPORATION 9HT7-32.768KDZF-T
EPSON MC-146 32.7680KA-A0:PURE SN
EPSON MC-146 32.7680KA-A0:ROHS
EPSON MC-146 32.7680KA-A3:PURE SN
EPSON MC-146 32.7680KA-A3:ROHS
EPSON MC-146 32.7680KA-A5:PURE SN

Group 2 - Load Capacitance Variant (9pF Load Capacitance):

TXC CORPORATION 9HT7-32.768KAZC-T
TXC CORPORATION 9HT7-32.768KBZC-T
TXC CORPORATION 9HT7-32.768KDZC-T

Group 2 parts differ in load capacitance specification (9pF vs. 12.5pF) and require circuit evaluation before substitution.

Parameter Comparison

Manufacturer	Part Number	Frequency	Load Capacitance	ESR	Temp Range	Package	Product Status	RoHS
Diodes Inc.	G53270004	32.768 kHz	12.5pF	65 kOhms	-40 to 85°C	4-SMD, Flat Leads	Discontinued	ROHS3
TXC CORPORATION	9H03200413	32.768 kHz	12.5pF	65 kOhms	-40 to 85°C	4-SMD, Flat Leads	Active	RoHS
TXC CORPORATION	9HT7-32.768KDZF-T	32.768 kHz	12.5pF	65 kOhms	-40 to 85°C	4-SMD, Flat Leads	Active	ROHS3
EPSON	MC-146 32.7680KA-A0:PURE SN	32.768 kHz	12.5pF	65 kOhms	-40 to 85°C	4-SMD, Flat Leads	Active	ROHS3
EPSON	MC-146 32.7680KA-A0:ROHS	32.768 kHz	12.5pF	65 kOhms	-40 to 85°C	4-SMD, Flat Leads	Active	ROHS3
EPSON	MC-146 32.7680KA-A3:PURE SN	32.768 kHz	12.5pF	65 kOhms	-40 to 85°C	4-SMD, Flat Leads	Active	ROHS3
EPSON	MC-146 32.7680KA-A3:ROHS	32.768 kHz	12.5pF	65 kOhms	-40 to 85°C	4-SMD, Flat Leads	Active	ROHS3
EPSON	MC-146 32.7680KA-A5:PURE SN	32.768 kHz	12.5pF	65 kOhms	-40 to 85°C	4-SMD, Flat Leads	Active	ROHS3
TXC CORPORATION	9HT7-32.768KAZC-T	32.768 kHz	9pF	65 kOhms	-40 to 85°C	4-SMD, Flat Leads	Active	RoHS
TXC CORPORATION	9HT7-32.768KBZC-T	32.768 kHz	9pF	65 kOhms	-40 to 85°C	4-SMD, Flat Leads	Active	RoHS
TXC CORPORATION	9HT7-32.768KDZC-T	32.768 kHz	9pF	65 kOhms	-40 to 85°C	4-SMD, Flat Leads	Active	RoHS

Engineering Selection Recommendations

For Direct Replacement (No Circuit Modification Required):

Select from Group 1 parts with 12.5pF load capacitance. All Group 1 substitutes maintain electrical and mechanical equivalence to the G53270004. EPSON MC-146 series parts offer the highest inventory availability (1,217 to 66,791 units) and active product status. TXC CORPORATION 9H03200413 provides an alternative with 30,300 units in stock.

RoHS Compliance Consideration:

All substitute parts maintain ROHS3 compliance equivalent to the original G53270004. Selection between PURE SN and ROHS variants depends on existing supply chain requirements and soldering process specifications.

For Load Capacitance Variants (9pF):

Group 2 parts (TXC CORPORATION 9HT7 series with 9pF load capacitance) differ from the original specification. These parts are suitable only if circuit design permits load capacitance adjustment or if application requirements allow 9pF operation. Circuit evaluation is required before implementation.

Inventory and Lead Time:

EPSON MC-146 32.7680KA-A0:ROHS offers maximum availability (66,791 units) for high-volume applications. TXC CORPORATION 9HT7-32.768KDZF-T provides 64,953 units with ROHS3 compliance and tape & reel packaging for automated assembly.

Frequently Asked Questions (FAQ)

Q: Can I use a 9pF load capacitance crystal as a substitute for the 12.5pF original?

A: Load capacitance affects crystal oscillation frequency and circuit stability. The 9pF variants (Group 2) operate at different electrical characteristics than the 12.5pF specification. Substitution requires circuit analysis and may necessitate tuning capacitor adjustment. Direct replacement without circuit modification is not supported.

Q: What is the difference between PURE SN and ROHS variants in the EPSON MC-146 series?

A: Both variants meet ROHS3 compliance. The designation indicates solder finish specification. Selection depends on your manufacturing process and supply chain requirements. Electrical performance is identical.

Q: Are all Group 1 substitutes pin-compatible with the G53270004?

A: Yes. All Group 1 parts share identical package specification (4-SMD, Flat Leads) and physical dimensions compatible with the original footprint. Direct board-level substitution is supported without layout modification.

Q: Which substitute offers the best long-term availability?

A: EPSON MC-146 32.7680KA-A0:ROHS maintains active product status with 66,791 units in stock, indicating established production and supply continuity. TXC CORPORATION 9HT7-32.768KDZF-T also maintains active status with 64,953 units available.

Q: Does moisture sensitivity level differ between substitutes?

A: All parts, including the original G53270004, specify MSL 1 (Unlimited), indicating no moisture sensitivity restrictions. Storage and handling requirements are equivalent across all substitutes.

Q: Can I mix different substitute manufacturers on the same board?

A: Yes. All Group 1 substitutes meet identical electrical and mechanical specifications. Mixed sourcing from TXC CORPORATION and EPSON is supported if supply constraints require it.

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