DSC1121DM2-007.3728 MEMS Oscillator Equivalent & Substitute Parts

Part Overview

The DSC1121DM2-007.3728 is a 7.3728 MHz MEMS-based XO (Standard) oscillator manufactured by Microchip Technology. This component operates as a CMOS output device with Enable/Disable functionality, designed for applications requiring precise frequency generation in the 7.3728 MHz range. The part is currently in Active product status with 1067 units available in inventory. Equivalent and substitute parts become necessary when addressing supply chain constraints, design revisions, or when transitioning from obsolete product lines to maintain system functionality.

Substiute Parts

DSC1121DM2-007.3728

Microchip TechnologyIn Stock: 1107DSC1121DM2-007.3728 Datasheet

Current PartRFQ

TD-7.3728MBD-T

TXC CORPORATIONIn Stock: 5732TD-7.3728MBD-T Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the DSC1121DM2-007.3728 is determined by the following critical parameters:

Mandatory Matching Parameters:

• Frequency: 7.3728 MHz (exact match required)
• Base Resonator: MEMS
• Oscillator Type: XO (Standard)
• Output Type: CMOS
• Function: Enable/Disable
• Frequency Stability: ±25ppm

Compatible Variation Parameters:

• Voltage Supply Range: Must encompass or be compatible with 2.25V ~ 3.6V
• Operating Temperature Range: Must support the required application temperature window
• Current Supply: Must not exceed system power budget constraints
• Package Type: Physical dimensions and pin configuration must accommodate PCB layout
• Mounting Type: Surface Mount compatibility required

The substitute part TD-7.3728MBD-T from TXC CORPORATION meets the mandatory frequency, resonator type, oscillator type, output type, function, and frequency stability requirements. However, differences exist in voltage supply range, operating temperature range, package configuration, and product status that must be evaluated for specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

DSC1121DM2-007.3728 (Primary Selection): The Microchip DSC1121DM2-007.3728 is the recommended primary component selection. This part maintains Active product status, ensuring long-term availability and supply chain stability. It provides the widest voltage supply range (2.25V ~ 3.6V) and extended operating temperature range (-55°C ~ 125°C), supporting diverse application requirements. ROHS3 compliance and AEC-Q100 ratings provide regulatory and automotive-grade assurance. Current inventory of 1067 units supports immediate procurement.

TD-7.3728MBD-T (Substitute with Constraints): The TXC TD-7.3728MBD-T may be considered as a substitute only when the following conditions are met: the application operates within the narrower voltage range of 3.3V, the operating temperature requirement does not exceed -40°C to 85°C, and the 4-SMD package configuration is compatible with existing PCB layouts. The Obsolete product status indicates this part is no longer in active production, presenting long-term supply risk. This substitute is suitable only for legacy system maintenance or when the DSC1121DM2-007.3728 is unavailable and application constraints align with the TD-7.3728MBD-T specifications.

Frequently Asked Questions (FAQ)

Q: Can the TD-7.3728MBD-T directly replace the DSC1121DM2-007.3728 in all applications?

A: No. While both parts share the same frequency, resonator type, oscillator type, output type, function, and frequency stability, critical differences exist. The TD-7.3728MBD-T operates at a fixed 3.3V supply voltage compared to the DSC1121DM2-007.3728's 2.25V ~ 3.6V range. The operating temperature range is narrower (-40°C ~ 85°C versus -55°C ~ 125°C). The package configuration differs (4-SMD versus 6-SMD). Substitution is valid only when application requirements fall within the TD-7.3728MBD-T's specifications.

Q: What are the key differences in package configuration between these parts?

A: The DSC1121DM2-007.3728 uses a 6-SMD, No Lead package with a maximum seated height of 0.90mm. The TD-7.3728MBD-T uses a 4-SMD, No Lead package with a maximum seated height of 0.80mm. Both maintain identical footprint dimensions (2.50mm L x 2.00mm W). The difference in SMD pin count and height may affect PCB layout compatibility and must be verified against specific board design constraints.

Q: Why is the TD-7.3728MBD-T listed as Obsolete?

A: Obsolete product status indicates the manufacturer has discontinued active production and support for the TD-7.3728MBD-T. This status presents supply chain risk for new designs or long-term production requirements. The DSC1121DM2-007.3728's Active status ensures continued availability and manufacturer support.

Q: Are there voltage supply compatibility concerns when substituting?

A: Yes. The DSC1121DM2-007.3728 accepts supply voltages from 2.25V to 3.6V, providing flexibility for various system architectures. The TD-7.3728MBD-T operates at a fixed 3.3V supply. If your application requires operation below 3.0V or above 3.6V, the TD-7.3728MBD-T is not compatible. Verify your system's voltage supply specification before considering substitution.

Q: What is the significance of the ±25ppm frequency stability specification?

A: Both parts maintain identical ±25ppm frequency stability, indicating equivalent frequency accuracy performance. This specification defines the maximum deviation from the nominal 7.3728 MHz frequency across the operating temperature and voltage ranges. Identical stability ratings confirm that frequency accuracy requirements are met by both components.

Q: How do the current supply specifications compare?

A: The DSC1121DM2-007.3728 draws a maximum of 35mA during normal operation and 22mA in Disable mode. The TD-7.3728MBD-T draws a maximum of 25mA during normal operation, with Disable mode current not specified. If your application has strict power consumption constraints, the TD-7.3728MBD-T's lower active current may be advantageous, but the absence of Disable mode current data requires verification with the manufacturer.

Q: Can these parts be used interchangeably in automotive applications?

A: The DSC1121DM2-007.3728 carries AEC-Q100 automotive-grade ratings, qualifying it for automotive applications. The TD-7.3728MBD-T's automotive qualification status is not specified in the provided data. For automotive applications, the DSC1121DM2-007.3728 is the appropriate selection.