9HT7-32.768KBZC-T Equivalent & Substitute Parts

Part Overview

The 9HT7-32.768KBZC-T is a 32.768 kHz tuning fork crystal manufactured by TXC CORPORATION. This kHz crystal operates at a fundamental frequency of 32.768 kHz with a frequency tolerance of ±20ppm and a load capacitance of 9pF. The part is housed in a 4-SMD flat lead package with surface mount configuration, suitable for real-time clock (RTC) and timing applications in electronic devices. The component is Active in product status and RoHS Compliant, with unlimited moisture sensitivity level (MSL 1). Equivalent and substitute parts are identified based on matching electrical parameters, mechanical compatibility, and operational specifications to ensure direct component interchangeability in circuit designs.

Key Parameters

Parameter	Value	Substitution Relevance
Frequency	32.768 kHz	Critical - Must match exactly
Frequency Tolerance	±20ppm	Critical - Determines timing accuracy
Load Capacitance	9pF	Critical - Affects circuit tuning and stability
ESR (Equivalent Series Resistance)	65 kOhms	Critical - Determines oscillation characteristics
Operating Mode	Fundamental	Critical - Operating principle
Operating Temperature Range	-40°C ~ 85°C	Important - Environmental compatibility
Package / Case	4-SMD, Flat Leads	Critical - Physical and mechanical fit
Mounting Type	Surface Mount	Critical - Assembly compatibility
Size / Dimension	0.264" L x 0.055" W (6.70mm x 1.40mm)	Important - PCB layout compatibility
Height - Seated (Max)	0.055" (1.40mm)	Important - Clearance and assembly
RoHS Status	RoHS Compliant	Important - Regulatory compliance
MSL (Moisture Sensitivity Level)	1 (Unlimited)	Important - Storage and handling

Substitute Part Grouping Explanation

Substitute parts for the 9HT7-32.768KBZC-T are classified into two categories based on load capacitance compatibility:

Group 1: Direct Electrical Equivalents (9pF Load Capacitance) Parts with 9pF load capacitance provide direct electrical substitution without circuit modification. These parts maintain identical frequency, tolerance, ESR, and operating temperature specifications. Parts in this group include MC-146 32.7680KA-AC0 variants (PURE SN and ROHS versions) from EPSON, RSE-32.768-9-H14-TR from Raltron Electronics, and SSPT7F-9PF20-R from Seiko Instruments.

Group 2: Parametric Equivalents (7pF Load Capacitance) Parts with 7pF load capacitance are parametric equivalents that require circuit evaluation. These parts maintain frequency, tolerance, ESR, and operating temperature specifications but differ in load capacitance. The reduced load capacitance may affect circuit tuning and stability characteristics. Parts in this group include 9HT7-32.768KDZY-T from TXC CORPORATION, CM13032768DZYT from Citizen Finedevice Co Ltd, and MC-146 32.7680KA-AG0 from EPSON.

Substitution Criteria:

Frequency: 32.768 kHz (exact match required)
Frequency Tolerance: ±20ppm (exact match required)
ESR: 65 kOhms (exact match required)
Operating Mode: Fundamental (exact match required)
Operating Temperature: -40°C ~ 85°C (exact match required)
Package / Case: 4-SMD, Flat Leads (exact match required)
Mounting Type: Surface Mount (exact match required)
Load Capacitance: 9pF (Group 1) or 7pF (Group 2)

Parameter Comparison

Manufacturer Part Number	Manufacturer	Frequency	Frequency Tolerance	Load Capacitance	ESR	Operating Temperature	Package / Case	Size (mm)	Height (mm)	RoHS Status	Inventory (Pcs)
9HT7-32.768KBZC-T	TXC CORPORATION	32.768 kHz	±20ppm	9pF	65 kOhms	-40°C ~ 85°C	4-SMD, Flat Leads	6.70 x 1.40	1.40	RoHS Compliant	828
9HT7-32.768KDZY-T	TXC CORPORATION	32.768 kHz	±20ppm	7pF	65 kOhms	-40°C ~ 85°C	4-SMD, Flat Leads	6.70 x 1.40	1.40	ROHS3 Compliant	4897
CM13032768DZYT	Citizen Finedevice Co Ltd	32.768 kHz	±20ppm	7pF	65 kOhms	-40°C ~ 85°C	4-SMD, Flat Leads	6.70 x 1.40	1.40	ROHS3 Compliant	3884
MC-146 32.7680KA-AC0: ROHS	EPSON	32.768 kHz	±20ppm	9pF	65 kOhms	-40°C ~ 85°C	4-SMD, Flat Leads	6.70 x 1.50	1.40	ROHS3 Compliant	2023
MC-146 32.7680KA-AC0:PURE SN	EPSON	32.768 kHz	±20ppm	9pF	65 kOhms	-40°C ~ 85°C	4-SMD, Flat Leads	6.70 x 1.50	1.40	ROHS3 Compliant	2120
MC-146 32.7680KA-AC3:ROHS	EPSON	32.768 kHz	±20ppm	9pF	65 kOhms	-40°C ~ 85°C	4-SMD, Flat Leads	6.70 x 1.50	1.40	ROHS3 Compliant	136461
MC-146 32.7680KA-AG0: ROHS	EPSON	32.768 kHz	±20ppm	7pF	65 kOhms	-40°C ~ 85°C	4-SMD, Flat Leads	6.70 x 1.50	1.40	ROHS3 Compliant	20977
RSE-32.768-9-H14-TR	Raltron Electronics	32.768 kHz	±20ppm	9pF	65 kOhms	-40°C ~ 85°C	4-SMD, Flat Leads	6.70 x 1.40	1.40	ROHS3 Compliant	3763
SSPT7F-9PF20-R	Seiko Instruments	32.768 kHz	±20ppm	9pF	65 kOhms	-40°C ~ 85°C	4-SMD, Flat Leads	6.70 x 1.40	1.40	ROHS3 Compliant	13507

Engineering Selection Recommendations

Direct Substitution (9pF Load Capacitance - No Circuit Modification Required):

The following parts provide direct electrical substitution for the 9HT7-32.768KBZC-T:

MC-146 32.7680KA-AC3:ROHS (EPSON): Highest inventory availability (136,461 pcs). ROHS3 Compliant. REACH Affected. Suitable for applications requiring maximum stock availability.
SSPT7F-9PF20-R (Seiko Instruments): 13,507 pcs in stock. ROHS3 Compliant. REACH Unaffected. Suitable for applications with REACH compliance requirements.
RSE-32.768-9-H14-TR (Raltron Electronics): 3,763 pcs in stock. ROHS3 Compliant. REACH Unaffected. Suitable for applications with REACH compliance requirements.
MC-146 32.7680KA-AC0: ROHS (EPSON): 2,023 pcs in stock. ROHS3 Compliant. REACH Affected.
MC-146 32.7680KA-AC0:PURE SN (EPSON): 2,120 pcs in stock. ROHS3 Compliant. REACH Affected.

Parametric Equivalents (7pF Load Capacitance - Circuit Evaluation Required):

The following parts are parametric equivalents with reduced load capacitance (7pF). Circuit evaluation is required to confirm compatibility:

MC-146 32.7680KA-AG0: ROHS (EPSON): 20,977 pcs in stock. ROHS3 Compliant. REACH Affected. Highest inventory among 7pF variants.
9HT7-32.768KDZY-T (TXC CORPORATION): 4,897 pcs in stock. ROHS3 Compliant. Same manufacturer as main part.
CM13032768DZYT (Citizen Finedevice Co Ltd): 3,884 pcs in stock. ROHS3 Compliant. REACH Affected.

Compliance Considerations:

All substitute parts are ROHS3 Compliant and Active in product status. Parts designated as REACH Affected (EPSON MC-146 series and Citizen Finedevice) are subject to REACH regulations. Parts designated as REACH Unaffected (Raltron Electronics RSE-32.768-9-H14-TR and Seiko Instruments SSPT7F-9PF20-R) are not subject to REACH regulations.

Frequently Asked Questions (FAQ)

Q1: Can I substitute a 7pF load capacitance crystal for the 9pF main part without circuit modification?

A: No. The 7pF load capacitance variants (9HT7-32.768KDZY-T, CM13032768DZYT, MC-146 32.7680KA-AG0) differ from the main part in load capacitance specification. Circuit evaluation is required to confirm compatibility, as load capacitance affects the tuning network and oscillation characteristics. Direct substitution without circuit modification is only supported by 9pF variants.

Q2: What is the difference between MC-146 32.7680KA-AC0:PURE SN and MC-146 32.7680KA-AC0: ROHS?

A: Both parts are electrically identical with 9pF load capacitance, 32.768 kHz frequency, ±20ppm tolerance, and 65 kOhms ESR. The designation difference indicates different manufacturing or plating specifications. Both are ROHS3 Compliant and REACH Affected. Inventory levels differ (2,120 pcs vs. 2,023 pcs).

Q3: Are there physical dimension differences between substitute parts?

A: Most substitute parts maintain the same footprint (6.70mm L x 1.40mm W) and height (1.40mm max). However, EPSON MC-146 series parts have a slightly wider dimension (6.70mm L x 1.50mm W). This minor width difference does not affect PCB layout compatibility for standard 4-SMD flat lead packages, but should be confirmed in specific circuit designs.

Q4: Which substitute part has the highest inventory availability?

A: MC-146 32.7680KA-AC3:ROHS from EPSON has the highest inventory with 136,461 pcs in stock. This part is a direct 9pF equivalent requiring no circuit modification.

Q5: What is the difference between REACH Affected and REACH Unaffected designations?

A: REACH Affected parts are subject to European REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) regulations. REACH Unaffected parts are not subject to these regulations. Selection depends on application location and regulatory requirements. Raltron Electronics RSE-32.768-9-H14-TR and Seiko Instruments SSPT7F-9PF20-R are REACH Unaffected.

Q6: Can I use MC-146 32.7680KA-AC3:ROHS as a direct replacement for 9HT7-32.768KBZC-T?

A: Yes. MC-146 32.7680KA-AC3:ROHS is a direct electrical equivalent with matching 9pF load capacitance, 32.768 kHz frequency, ±20ppm tolerance, 65 kOhms ESR, and identical operating temperature range. No circuit modification is required. Physical dimensions are compatible with standard 4-SMD flat lead packages.

Q7: What packaging options are available for substitute parts?

A: All substitute parts are supplied in Tape & Reel (TR) packaging. RSE-32.768-9-H14-TR from Raltron Electronics is also available in Cut Tape (CT) & Digi-Reel® packaging. Packaging selection depends on assembly process requirements and order quantities.

Q8: Are all substitute parts RoHS Compliant?

A: Yes. All substitute parts listed are either RoHS Compliant or ROHS3 Compliant. The main part 9HT7-32.768KBZC-T is RoHS Compliant. All substitute parts meet or exceed RoHS compliance requirements.

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