7B-16.000MBBK-T Equivalent & Substitute Parts

Part Overview

The 7B-16.000MBBK-T is a 16 MHz fundamental mode crystal oscillator manufactured by TXC CORPORATION, designed for surface mount applications in 4-SMD, No Lead package configuration. This part operates at ±50ppm frequency stability with 20pF load capacitance and 40 Ohms equivalent series resistance (ESR). The product is classified as Obsolete, necessitating identification of active equivalent alternatives that maintain electrical and mechanical compatibility for ongoing production and repair applications.

Key Parameters

Parameter	Value	Unit
Frequency	16.0000	MHz
Frequency Stability	±50	ppm
Load Capacitance	20	pF
ESR (Equivalent Series Resistance)	40	Ohms
Operating Mode	Fundamental	—
Operating Temperature Range	-20 to 70	°C
Mounting Type	Surface Mount	—
Package / Case	4-SMD, No Lead	—
Size / Dimension	5.00 × 3.20	mm
Height - Seated (Max)	1.05	mm
RoHS Status	RoHS Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the 7B-16.000MBBK-T is determined by strict alignment of the following critical parameters:

Mandatory Matching Parameters:

Frequency: 16.0000 MHz (exact match required)
Frequency Stability: ±50 ppm (exact match required)
Load Capacitance: 20 pF (exact match required)
Operating Mode: Fundamental (exact match required)
Operating Temperature Range: -20°C to 70°C (exact match required)
Package / Case: 4-SMD, No Lead (exact match required)
Mounting Type: Surface Mount (exact match required)

Allowable Variation Parameters:

ESR (Equivalent Series Resistance): Variation permitted within circuit design tolerance
Physical Dimensions: Variation permitted provided component fits within PCB footprint constraints
Packaging Format: Variation permitted (bulk to Tape & Reel conversion acceptable)
Product Status: Active status preferred for obsolete parts

All substitute parts listed below satisfy the mandatory matching parameters. Variations in ESR and physical dimensions are documented for circuit design verification.

Parameter Comparison

Parameter	7B-16.000MBBK-T	7M-16.000MBBK-T	7M16000348	ECS-160-20-33-TR	RH100-16.000-20-5050-TR
Manufacturer	TXC CORPORATION	TXC CORPORATION	TXC CORPORATION	ECS Inc.	Raltron Electronics
Frequency	16 MHz	16 MHz	16 MHz	16 MHz	16 MHz
Frequency Stability	±50 ppm	±50 ppm	±50 ppm	±50 ppm	±50 ppm
Load Capacitance	20 pF	20 pF	20 pF	20 pF	20 pF
ESR	40 Ohms	80 Ohms	Not Specified	80 Ohms	70 Ohms
Operating Mode	Fundamental	Fundamental	Not Specified	Fundamental	Fundamental
Operating Temperature	-20 to 70°C	-20 to 70°C	-20 to 70°C	-20 to 70°C	-20 to 70°C
Package / Case	4-SMD, No Lead	4-SMD, No Lead	4-SMD, No Lead	4-SMD, No Lead	4-SMD, No Lead
Size / Dimension	5.00 × 3.20 mm	3.20 × 2.50 mm	3.20 × 2.50 mm	3.20 × 2.50 mm	3.20 × 2.50 mm
Height - Seated (Max)	1.05 mm	0.80 mm	0.80 mm	0.80 mm	0.80 mm
Product Status	Obsolete	Active	Active	Active	Active
RoHS Status	RoHS Compliant	RoHS Compliant	RoHS Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Inventory Status	1128 Pcs	833 Pcs	1044 Pcs	43300 Pcs	1614 Pcs

Engineering Selection Recommendations

Primary Substitute (Recommended for New Designs): ECS-160-20-33-TR is the preferred substitute for the 7B-16.000MBBK-T. This part maintains all mandatory electrical parameters while offering Active product status, ROHS3 compliance, and the highest inventory availability (43,300 units). The ESR specification of 80 Ohms represents a 100% increase from the original 40 Ohms; circuit design verification is required to confirm compatibility with oscillator load impedance specifications.

Secondary Substitutes (Compatible Alternatives):

7M-16.000MBBK-T (TXC CORPORATION): Active status, same manufacturer as original part, ESR 80 Ohms, reduced physical dimensions (3.20 × 2.50 mm vs. 5.00 × 3.20 mm), suitable for space-constrained applications
RH100-16.000-20-5050-TR (Raltron Electronics): Active status, ROHS3 compliant, ESR 70 Ohms (closest to original 40 Ohms specification), compact dimensions
7M16000348 (TXC CORPORATION): Active status, same manufacturer, compact dimensions, ESR not specified in documentation

Dimensional Compatibility Consideration: The 7B-16.000MBBK-T measures 5.00 × 3.20 mm. All substitute parts measure 3.20 × 2.50 mm. PCB footprint redesign may be required if the original layout was optimized for the larger package dimensions. Height reduction from 1.05 mm to 0.80 mm is compatible with standard surface mount assembly processes.

Frequently Asked Questions (FAQ)

Q: Can the 7B-16.000MBBK-T be directly replaced with ECS-160-20-33-TR without circuit modification?

A: Direct replacement is possible if the circuit design accommodates the ESR variation from 40 Ohms to 80 Ohms. The oscillator circuit must be verified to function within the specified load capacitance of 20 pF with the higher ESR value. All other electrical parameters (frequency, stability, operating temperature, load capacitance) are identical.

Q: What is the impact of the physical dimension change from 5.00 × 3.20 mm to 3.20 × 2.50 mm?

A: The smaller substitute parts require PCB footprint modification. The reduced footprint may improve board layout efficiency but necessitates re-design of the component placement and associated trace routing. Height reduction from 1.05 mm to 0.80 mm is compatible with standard surface mount assembly equipment.

Q: Are all substitute parts RoHS compliant?

A: Yes. The original 7B-16.000MBBK-T is RoHS Compliant. All substitute parts are either RoHS Compliant or ROHS3 Compliant, meeting current environmental regulations.

Q: Which substitute part has the closest ESR specification to the original?

A: The RH100-16.000-20-5050-TR has an ESR of 70 Ohms, which is closest to the original 40 Ohms specification. The ECS-160-20-33-TR and 7M-16.000MBBK-T both specify 80 Ohms ESR. The 7M16000348 does not provide ESR specification in available documentation.

Q: What is the difference between Tape & Reel (TR) packaging and bulk packaging?

A: Tape & Reel packaging is standard for automated assembly processes and provides better component protection during storage and handling. The 7B-16.000MBBK-T is available in bulk format, while ECS-160-20-33-TR and RH100-16.000-20-5050-TR are supplied in Tape & Reel format. Both formats contain identical components; packaging format selection depends on assembly process requirements.

Q: Is the 7M-16.000MBBK-T a suitable substitute despite being from the same manufacturer?

A: Yes. The 7M-16.000MBBK-T is an active product from TXC CORPORATION with identical electrical specifications. The primary differences are ESR (80 Ohms vs. 40 Ohms) and physical dimensions (3.20 × 2.50 mm vs. 5.00 × 3.20 mm). This part is suitable for applications where the smaller footprint is advantageous.

Q: Can multiple substitute parts be used interchangeably in the same design?

A: All listed substitute parts meet the mandatory electrical parameters (16 MHz, ±50 ppm, 20 pF load capacitance, fundamental mode, -20°C to 70°C operating range). However, ESR variations (40 to 80 Ohms) require circuit verification. Once a substitute is selected and validated for a specific circuit design, that part should be used consistently unless circuit re-qualification is performed for alternative substitutes.

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