DM7447AN Equivalent & Substitute Parts

Part Overview

The DM7447AN is a 7-segment LED driver IC manufactured by onsemi, designed to decode BCD (Binary Coded Decimal) input signals and drive 7-segment LED displays. This device operates as a logic decoder with integrated output drivers for direct LED segment control. The DM7447AN is classified as obsolete, making equivalent and substitute parts necessary for new designs, maintenance applications, and inventory replenishment where original stock is unavailable.

Substiute Parts

DM7447AN

onsemiIn Stock: 849DM7447AN Datasheet

Current PartRFQ

SN7447AN

Texas InstrumentsIn Stock: 9286SN7447AN Datasheet

DirectRFQ

CD74HCT4511E

Harris CorporationIn Stock: 10591CD74HCT4511E Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the DM7447AN is determined by the following critical parameters:

Electrical Compatibility:

• Voltage supply range: 4.75V ~ 5.25V (standard 5V logic supply)
• BCD input interface for 7-segment display decoding
• 16-pin DIP package footprint compatibility
• Through-hole mounting requirement

Mechanical Compatibility:

• Package type: 16-DIP (0.300", 7.62mm)
• Pin count and pinout alignment with original DM7447AN

Functional Requirements:

• 7-segment LED display driver capability
• BCD-to-7-segment decoder functionality
• LED segment output drive capability

Parts meeting these criteria are classified as direct substitutes. Parts with extended operating temperature ranges or different supply current specifications remain compatible if voltage supply and package requirements are satisfied.

Parameter Comparison

Engineering Selection Recommendations

SN7447AN (Texas Instruments) is the primary direct substitute for the DM7447AN. Both devices share identical voltage supply specifications (4.75V ~ 5.25V), operating temperature range (0°C ~ 70°C), and 16-PDIP package configuration. The SN7447AN is currently in active production status, ensuring long-term availability and supply chain reliability. This part carries ROHS3 compliance, meeting modern environmental and regulatory requirements where applicable.

CD74HCT4511E (Harris Corporation) functions as a compatible alternative with extended operating temperature range (-55°C ~ 125°C) and wider supply voltage tolerance (4.5V ~ 5.5V). The significantly lower supply current specification (8 µA versus 60 mA) indicates different internal architecture. This part is obsolete, similar to the DM7447AN, and carries RoHS non-compliance status. Selection of this part is appropriate only when extended temperature operation is required and supply current reduction is beneficial.

For new designs and applications requiring long-term component availability, the SN7447AN is the recommended choice due to active product status and regulatory compliance.

Frequently Asked Questions (FAQ)

Q: Can the SN7447AN directly replace the DM7447AN without PCB modifications?

A: Yes. Both devices use identical 16-PDIP package dimensions (0.300", 7.62mm) and pinout configuration. No PCB layout changes are required for direct substitution.

Q: What is the primary difference between the DM7447AN and SN7447AN?

A: Both parts are functionally equivalent 7-segment BCD decoders with identical electrical specifications. The primary difference is manufacturer (onsemi versus Texas Instruments) and product status (obsolete versus active). The SN7447AN is recommended for new applications due to active production and ROHS3 compliance.

Q: Is the CD74HCT4511E suitable as a substitute in all applications?

A: The CD74HCT4511E is electrically compatible within its specified parameters. However, the significantly lower supply current (8 µA versus 60 mA) reflects different output drive capability. Verify that output drive requirements are met before substitution. The extended operating temperature range (-55°C ~ 125°C) makes this part suitable for applications requiring operation outside the standard 0°C ~ 70°C range.

Q: Are there any compliance considerations when substituting these parts?

A: The DM7447AN and CD74HCT4511E are RoHS non-compliant. The SN7447AN is ROHS3 compliant. For applications subject to RoHS regulations, the SN7447AN is the appropriate choice.

Q: What supply voltage range is acceptable for all three parts?

A: The overlapping supply voltage range common to all three parts is 4.75V ~ 5.25V. The CD74HCT4511E accepts 4.5V ~ 5.5V, providing wider tolerance. For guaranteed compatibility across all parts, maintain supply voltage within 4.75V ~ 5.25V.

Q: Can these parts be used interchangeably in existing designs?

A: Yes, provided the application operates within the common electrical specifications (4.75V ~ 5.25V supply, 0°C ~ 70°C operating temperature, and 16-PDIP through-hole mounting). Verify PCB footprint compatibility before assembly.