ASFLMB-50.000MHZ-LR-T Equivalent & Substitute Parts

Part Overview

The ASFLMB-50.000MHZ-LR-T is a 50 MHz MEMS oscillator manufactured by Abracon LLC, featuring LVCMOS output with standby power-down capability. This XO (Standard) oscillator operates across 1.8V to 3.3V supply voltage range and is housed in a compact 4-SMD, No Lead package. The part maintains Active product status and is RoHS3 compliant with MSL 1 rating, indicating unlimited moisture sensitivity protection.

Substitute parts are identified when equivalent electrical performance and mechanical compatibility are maintained within the ASFLMB series, allowing direct replacement in applications where frequency stability and power consumption parameters align with design requirements.

Key Parameters

Parameter	Value
Manufacturer Part Number	ASFLMB-50.000MHZ-LR-T
Manufacturer	Abracon LLC
Series	ASFLMB, Pure Silicon™
Base Resonator	MEMS
Type	XO (Standard)
Frequency	50 MHz
Output	LVCMOS
Voltage - Supply	1.8V ~ 3.3V
Frequency Stability	±25ppm
Operating Temperature	-40°C ~ 85°C
Current - Supply (Max)	16mA
Current - Supply (Disable) (Max)	15µA
Mounting Type	Surface Mount
Package / Case	4-SMD, No Lead
Size / Dimension	0.197" L x 0.126" W (5.00mm x 3.20mm)
Height - Seated (Max)	0.035" (0.90mm)
Packaging	Tape & Reel (TR)
Product Status	Active
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
REACH Status	REACH Unaffected

Substitute Part Grouping Explanation

Substitution eligibility for the ASFLMB-50.000MHZ-LR-T is determined by strict equivalence across the following critical parameters:

Frequency: 50 MHz (exact match required)
Output Type: LVCMOS (exact match required)
Supply Voltage Range: 1.8V ~ 3.3V (exact match required)
Package / Case: 4-SMD, No Lead (exact match required)
Mounting Type: Surface Mount (exact match required)
Physical Dimensions: 5.00mm x 3.20mm (exact match required)
Base Resonator: MEMS (exact match required)
Series: ASFLMB (exact match required)

Substitute parts within the ASFLMB series maintain identical mechanical and electrical interfaces, allowing direct PCB-level replacement. Variations in frequency stability (±ppm tolerance) and maximum supply current do not preclude substitution when the application's timing accuracy and power budget accommodate the specified ranges.

Parameter Comparison

Parameter	ASFLMB-50.000MHZ-LR-T	ASFLMB-50.000MHZ-LY-T	ASFLMB-50.000MHZ-LC-T
Manufacturer	Abracon LLC	Abracon LLC	Abracon LLC
Series	ASFLMB, Pure Silicon™	ASFLMB, Pure Silicon™	ASFLMB, Pure Silicon™
Frequency	50 MHz	50 MHz	50 MHz
Output	LVCMOS	LVCMOS	LVCMOS
Voltage - Supply	1.8V ~ 3.3V	1.8V ~ 3.3V	1.8V ~ 3.3V
Frequency Stability	±25ppm	±10ppm	±50ppm
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Current - Supply (Max)	16mA	16mA	16mA
Current - Supply (Disable) (Max)	15µA	15µA	15µA
Package / Case	4-SMD, No Lead	4-SMD, No Lead	4-SMD, No Lead
Size / Dimension	5.00mm x 3.20mm	5.00mm x 3.20mm	5.00mm x 3.20mm
Height - Seated (Max)	0.035" (0.90mm)	0.035" (0.90mm)	0.035" (0.90mm)
Packaging	Tape & Reel (TR)	Tape & Reel (TR)	Tape & Reel (TR)
Product Status	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

All three parts maintain Active product status and identical compliance certifications (RoHS3, REACH Unaffected, MSL 1). Selection between ASFLMB-50.000MHZ-LR-T, ASFLMB-50.000MHZ-LY-T, and ASFLMB-50.000MHZ-LC-T is determined by frequency stability requirements:

ASFLMB-50.000MHZ-LY-T provides the tightest frequency stability at ±10ppm, suitable for applications requiring enhanced timing precision.

ASFLMB-50.000MHZ-LR-T offers mid-range stability at ±25ppm, balancing cost and performance for general-purpose timing applications.

ASFLMB-50.000MHZ-LC-T provides the widest tolerance at ±50ppm, appropriate for applications with relaxed frequency accuracy requirements.

All parts are mechanically and electrically interchangeable at the PCB level, with identical power consumption, supply voltage range, and thermal operating range.

Frequently Asked Questions (FAQ)

Q: Can ASFLMB-50.000MHZ-LY-T directly replace ASFLMB-50.000MHZ-LR-T on the PCB?

A: Yes. Both parts share identical package geometry (4-SMD, No Lead, 5.00mm x 3.20mm), pinout, supply voltage range (1.8V ~ 3.3V), and output type (LVCMOS). Direct PCB-level substitution is supported without layout modifications.

Q: What is the primary difference between these substitute parts?

A: Frequency stability tolerance differs across the three parts. ASFLMB-50.000MHZ-LY-T specifies ±10ppm, ASFLMB-50.000MHZ-LR-T specifies ±25ppm, and ASFLMB-50.000MHZ-LC-T specifies ±50ppm. All other electrical and mechanical parameters remain identical.

Q: Are all three parts RoHS3 compliant?

A: Yes. ASFLMB-50.000MHZ-LR-T, ASFLMB-50.000MHZ-LY-T, and ASFLMB-50.000MHZ-LC-T are all RoHS3 compliant with MSL 1 rating and REACH Unaffected status.

Q: What is the maximum supply current for these oscillators?

A: All three parts specify a maximum supply current of 16mA during normal operation and 15µA during disable (standby) mode.

Q: Can these parts operate across the full -40°C to 85°C temperature range?

A: Yes. All three substitute parts maintain specified performance across the -40°C to 85°C operating temperature range.

Q: Is the packaging format identical across all three parts?

A: Yes. All parts are supplied in Tape & Reel (TR) packaging format with identical 4-SMD, No Lead case configuration.

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