9B-13.560MBBK-B Crystal Equivalent & Substitute Parts

Part Overview

The 9B-13.560MBBK-B is a 13.56 MHz through-hole crystal manufactured by TXC CORPORATION, designed for fundamental mode operation with 20pF load capacitance and 40 Ohms equivalent series resistance. This component is classified as obsolete product status. Identification of equivalent and substitute parts is necessary to maintain design continuity and ensure component availability for production and field replacement applications.

Key Parameters

Parameter	Value
Frequency	13.56 MHz
Frequency Stability	±50ppm
Load Capacitance	20pF
ESR (Equivalent Series Resistance)	40 Ohms
Operating Mode	Fundamental
Operating Temperature Range	-20°C ~ 70°C
Mounting Type	Through Hole
Package / Case	HC-49/US
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the 9B-13.560MBBK-B is determined by the following critical parameters:

Primary Matching Criteria:

Frequency: 13.56 MHz (exact match required)
Frequency Stability: ±50ppm (exact match required)
Operating Mode: Fundamental (exact match required)
Package / Case: HC-49/US (exact match required)
Mounting Type: Through Hole (exact match required)
Operating Temperature Range: -20°C ~ 70°C (exact match required)

Secondary Compatibility Parameters:

Load Capacitance: 20pF (primary specification; deviations affect circuit performance)
ESR: 40 Ohms (primary specification; deviations affect circuit performance)

The substitute part HC-49/U-S13560000BQIB matches all primary criteria. However, it differs in load capacitance (16pF versus 20pF) and ESR (80 Ohms versus 40 Ohms), which represent functional deviations from the original specification.

Parameter Comparison

Parameter	9B-13.560MBBK-B (TXC)	HC-49/U-S13560000BQIB (Citizen Finedevice)	Match Status
Manufacturer	TXC CORPORATION	Citizen Finedevice Co Ltd	Different
Frequency	13.56 MHz	13.56 MHz	Match
Frequency Stability	±50ppm	±50ppm	Match
Frequency Tolerance	±50ppm	±50ppm	Match
Load Capacitance	20pF	16pF	Deviation
ESR	40 Ohms	80 Ohms	Deviation
Operating Mode	Fundamental	Fundamental	Match
Operating Temperature	-20°C ~ 70°C	-20°C ~ 70°C	Match
Mounting Type	Through Hole	Through Hole	Match
Package / Case	HC-49/US	HC-49/US	Match
Size / Dimension	0.453" L x 0.197" W (11.50mm x 5.00mm)	0.453" L x 0.183" W (11.50mm x 4.66mm)	Minor Variation
Height - Seated (Max)	0.145" (3.68mm)	0.138" (3.50mm)	Minor Variation
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Match
Product Status	Obsolete	Active	Different

Engineering Selection Recommendations

Compliance and Regulatory Status:

Both the 9B-13.560MBBK-B and HC-49/U-S13560000BQIB are ROHS3 compliant and classified under ECCN EAR99 with HTSUS code 8541.60.0050. The substitute part HC-49/U-S13560000BQIB carries active product status from Citizen Finedevice Co Ltd, whereas the original 9B-13.560MBBK-B is obsolete.

Functional Deviations:

The HC-49/U-S13560000BQIB substitute differs in load capacitance (16pF versus 20pF) and ESR (80 Ohms versus 40 Ohms). These deviations alter the electrical characteristics of the crystal oscillator circuit. Load capacitance affects the resonant frequency and circuit tuning requirements. ESR affects power dissipation and circuit Q-factor. Circuit-level validation is required to determine whether these deviations are acceptable for the intended application.

Availability and Inventory:

The substitute part HC-49/U-S13560000BQIB is available in active inventory (1034 Pcs) with active product status, whereas the original part is obsolete with limited remaining stock (803 Pcs).

Frequently Asked Questions (FAQ)

Q: Can HC-49/U-S13560000BQIB be used as a direct replacement for 9B-13.560MBBK-B?

A: Both parts share identical frequency (13.56 MHz), frequency stability (±50ppm), operating mode (Fundamental), package (HC-49/US), and temperature range (-20°C ~ 70°C). However, the substitute differs in load capacitance (16pF versus 20pF) and ESR (80 Ohms versus 40 Ohms). Direct substitution depends on circuit tolerance to these electrical parameter deviations.

Q: What is the significance of the load capacitance difference?

A: Load capacitance is a critical parameter that affects the crystal's resonant frequency in the oscillator circuit. The original part specifies 20pF, while the substitute specifies 16pF. This 4pF difference requires circuit-level analysis to confirm compatibility with the oscillator design.

Q: What is the significance of the ESR difference?

A: Equivalent Series Resistance (ESR) affects the crystal's power dissipation and the quality factor (Q) of the oscillator circuit. The original part specifies 40 Ohms, while the substitute specifies 80 Ohms. Higher ESR increases power consumption and may affect circuit stability.

Q: Are both parts physically compatible with HC-49/US footprints?

A: Both parts use the HC-49/US package. Minor dimensional variations exist: the substitute is slightly narrower (4.66mm versus 5.00mm) and shorter (3.50mm versus 3.68mm). These variations remain within HC-49/US package specifications and are compatible with standard through-hole footprints.

Q: What is the product status difference, and why does it matter?

A: The original 9B-13.560MBBK-B is classified as obsolete, indicating discontinued manufacturing. The substitute HC-49/U-S13560000BQIB is active product status, ensuring continued availability and manufacturing support from Citizen Finedevice Co Ltd.

Q: Are both parts RoHS compliant?

A: Yes, both parts are ROHS3 compliant and carry identical regulatory classifications (ECCN EAR99, HTSUS 8541.60.0050).

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