Equivalent & Substitute Parts for 7M16000035 16 MHz Crystal

Part Overview

The TXC CORPORATION 7M16000035 is a 16 MHz surface mount crystal oscillator in 4-SMD, No Lead package configuration. This active product operates across the -20°C to 70°C temperature range with ±10ppm frequency stability and 15pF load capacitance. The component is RoHS Compliant with MSL 1 rating, indicating unlimited moisture sensitivity protection. Substitute parts are identified based on matching frequency, stability, temperature range, and surface mount package compatibility while accommodating variations in load capacitance and ESR specifications.

Key Parameters

Parameter	Value	Significance for Substitution
Frequency	16 MHz	Critical - must match exactly
Frequency Stability	±10ppm	Critical - determines timing accuracy
Load Capacitance	15pF	Important - affects circuit tuning
Operating Temperature Range	-20°C ~ 70°C	Critical - defines operational limits
Mounting Type	Surface Mount	Critical - determines PCB assembly compatibility
Package / Case	4-SMD, No Lead	Critical - physical footprint requirement
RoHS Status	RoHS Compliant	Important - regulatory compliance
MSL Rating	1 (Unlimited)	Important - moisture protection level

Substitute Part Grouping Explanation

Substitution eligibility for the 7M16000035 is determined by the following mandatory parameters:

Critical Matching Parameters:

Frequency: 16 MHz (exact match required)
Frequency Stability: ±10ppm (exact match required)
Operating Temperature Range: -20°C ~ 70°C (exact match required)
Mounting Type: Surface Mount (exact match required)
Package / Case: 4-SMD, No Lead (exact match required)

Allowable Variation Parameters:

Load Capacitance: 15pF (main part) to 12pF or 16pF (substitute parts) - acceptable within circuit design tolerance
ESR (Equivalent Series Resistance): Not specified in main part; substitute parts range from 50 Ohms to 120 Ohms
Physical Dimensions: Minor variations permitted within SMD package class
Packaging Format: Original part unspecified; substitutes supplied in Tape & Reel (TR)

All four substitute parts meet the critical matching parameters. Load capacitance variations of ±1pF to ±4pF from the original 15pF specification remain within acceptable substitution tolerance for 16 MHz crystal applications.

Parameter Comparison

Parameter	7M16000035 (TXC)	ECS-160-16-33B-CKM-TR (ECS Inc.)	Q 16,0-JXS21-12-10/10-WA-LF (Jauch)	Q 16,0-JXS22-12-10/10-WA-LF (Jauch)	Q 16,0-JXS32-12-10/10-WA-LF (Jauch)
Manufacturer	TXC CORPORATION	ECS Inc.	Jauch Quartz	Jauch Quartz	Jauch Quartz
Frequency	16 MHz	16 MHz	16 MHz	16 MHz	16 MHz
Frequency Stability	±10ppm	±10ppm	±10ppm	±10ppm	±10ppm
Frequency Tolerance	±10ppm	±10ppm	±10ppm	±10ppm	±10ppm
Load Capacitance	15pF	16pF	12pF	12pF	12pF
ESR (Equivalent Series Resistance)	Not specified	60 Ohms	120 Ohms	80 Ohms	50 Ohms
Operating Temperature Range	-20°C ~ 70°C	-20°C ~ 70°C	-20°C ~ 70°C	-20°C ~ 70°C	-20°C ~ 70°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	4-SMD, No Lead	4-SMD, No Lead	4-SMD, No Lead	4-SMD, No Lead	4-SMD, No Lead
Size / Dimension (L x W)	3.20mm x 2.50mm	3.20mm x 2.50mm	2.00mm x 1.60mm	2.50mm x 2.00mm	3.20mm x 2.50mm
Height - Seated (Max)	0.80mm	0.80mm	0.55mm	0.60mm	0.70mm
RoHS Status	RoHS Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Active	Active	Active	Active	Active

Engineering Selection Recommendations

All four substitute parts are active products with current manufacturing status and full regulatory compliance. Selection among substitutes is based on the following engineering criteria:

ECS-160-16-33B-CKM-TR (ECS Inc.): Load capacitance of 16pF provides closest match to the original 15pF specification, with only 1pF deviation. Identical physical dimensions (3.20mm x 2.50mm) and maximum height (0.80mm) ensure direct PCB footprint compatibility. ESR of 60 Ohms falls within typical crystal specifications. ROHS3 Compliant status meets regulatory requirements.

Q 16,0-JXS32-12-10/10-WA-LF (Jauch Quartz): Identical physical dimensions (3.20mm x 2.50mm) to the original part with lowest ESR specification at 50 Ohms. Load capacitance of 12pF represents 3pF deviation from original specification. Highest inventory availability (17,835 pcs) among substitute options. ROHS3 Compliant status meets regulatory requirements.

Q 16,0-JXS22-12-10/10-WA-LF (Jauch Quartz): Load capacitance of 12pF with ESR of 80 Ohms. Physical dimensions of 2.50mm x 2.00mm with maximum height of 0.60mm provide compact form factor. ROHS3 Compliant status meets regulatory requirements.

Q 16,0-JXS21-12-10/10-WA-LF (Jauch Quartz): Smallest physical dimensions (2.00mm x 1.60mm) with lowest maximum height (0.55mm). Load capacitance of 12pF with highest ESR specification at 120 Ohms. ROHS3 Compliant status meets regulatory requirements. Suitable for space-constrained applications.

Frequently Asked Questions (FAQ)

Q: Can I substitute the 7M16000035 with any of these four parts?

A: Yes. All four substitute parts match the critical parameters: 16 MHz frequency, ±10ppm stability, -20°C to 70°C operating range, surface mount 4-SMD No Lead package, and RoHS/MSL compliance. Load capacitance variations (12pF to 16pF) are within acceptable tolerance for 16 MHz crystal circuit design.

Q: What is the significance of load capacitance differences?

A: Load capacitance affects the crystal's resonant frequency in the circuit. The original part specifies 15pF. Substitute parts offer 12pF (3pF lower) or 16pF (1pF higher). Circuit designers must verify that their oscillator circuit tuning capacitors can accommodate these variations. A 3pF to 4pF deviation typically requires minor circuit adjustment but remains within standard design practice for 16 MHz crystals.

Q: Why do substitute parts have different ESR values?

A: ESR (Equivalent Series Resistance) is not specified for the original 7M16000035. Substitute parts range from 50 Ohms to 120 Ohms. ESR affects crystal startup time and power consumption. Lower ESR (50-60 Ohms) provides faster startup; higher ESR (120 Ohms) may require stronger oscillator drive circuits. Selection depends on specific circuit requirements.

Q: Are there physical footprint compatibility concerns?

A: The ECS-160-16-33B-CKM-TR and Q 16,0-JXS32-12-10/10-WA-LF maintain identical dimensions (3.20mm x 2.50mm) and height (0.80mm and 0.70mm respectively) to the original part, ensuring direct PCB compatibility. The Jauch JXS21 and JXS22 variants offer smaller footprints (2.00mm x 1.60mm and 2.50mm x 2.00mm) and may require PCB layout verification for pad alignment.

Q: What is the difference between RoHS and ROHS3 compliance?

A: Both designations indicate lead-free, halogen-free compliance with EU environmental directives. ROHS3 represents the current regulatory standard. All parts listed meet current compliance requirements.

Q: Which substitute offers the best inventory availability?

A: The Q 16,0-JXS32-12-10/10-WA-LF (Jauch Quartz) provides the highest inventory with 17,835 pieces in stock, compared to 4,378 pieces for the ECS part and 3,948 to 6,397 pieces for other Jauch variants.

Q: Can I mix substitute parts in the same production batch?

A: All substitute parts meet identical frequency, stability, and temperature specifications. However, load capacitance variations (12pF vs. 16pF) may require separate circuit tuning verification. Mixing parts with different load capacitances in the same design is not recommended without circuit re-qualification.

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