SN7445NG4 Equivalent & Substitute Parts

Part Overview

The SN7445NG4 is a logic decoder IC with 1 x 4:10 decoding configuration in a 16-DIP package, manufactured by Texas Instruments as part of the 7400 series. This part is discontinued at DiGi Electronics, making equivalent substitute parts necessary for ongoing design support and procurement. The SN7445NG4 operates as a single-supply decoder with standard TTL logic levels and through-hole mounting, suitable for applications requiring address decoding and logic signal distribution in legacy and modern systems.

Substiute Parts

SN7445NG4

Texas InstrumentsIn Stock: 961SN7445NG4 Datasheet

Current PartRFQ

SN7445N

Texas InstrumentsIn Stock: 4989SN7445N Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SN7445NG4 is determined by the following critical parameters that must remain constant:

• Decoder Configuration: 1 x 4:10 circuit topology
• Package Type: 16-DIP (0.300", 7.62mm) through-hole mounting
• Voltage Supply Range: 4.75V ~ 5.25V single supply
• Output Characteristics: 40µA output high current, 1.6mA output low current
• Operating Temperature Range: 0°C ~ 70°C
• Series Compatibility: 7400 series logic family
• Compliance: ROHS3 compliant, REACH unaffected

The SN7445N qualifies as a direct substitute because it maintains identical electrical specifications, circuit configuration, package dimensions, and compliance certifications. The primary distinction is product status and packaging format.

Parameter Comparison

Engineering Selection Recommendations

The SN7445N is the manufacturer-recommended substitute for the discontinued SN7445NG4. Both parts are manufactured by Texas Instruments and maintain identical electrical and mechanical specifications. The SN7445N carries active product status, ensuring continued availability and supply chain reliability. Both parts meet ROHS3 compliance and REACH requirements, making them suitable for applications with environmental and regulatory constraints. Selection between these parts should be based on packaging requirements: the SN7445N is supplied in tube packaging, whereas the SN7445NG4 was supplied in bulk format. For new designs or ongoing production requiring the 1 x 4:10 decoder configuration in 16-DIP through-hole package, the SN7445N is the appropriate choice.

Frequently Asked Questions (FAQ)

Q: Can the SN7445N directly replace the SN7445NG4 in existing designs?

A: Yes. The SN7445N is electrically and mechanically identical to the SN7445NG4. Both parts feature the same 16-DIP package, voltage supply range, output current specifications, and operating temperature range. Direct substitution is possible without circuit modification.

Q: What is the difference between SN7445NG4 and SN7445N?

A: The primary differences are product status and packaging format. The SN7445NG4 is discontinued at DiGi Electronics and was supplied in bulk packaging. The SN7445N is an active product supplied in tube packaging. All electrical and mechanical parameters are identical.

Q: Are there any compliance differences between these parts?

A: No. Both the SN7445NG4 and SN7445N are ROHS3 compliant and REACH unaffected. They meet identical environmental and regulatory standards.

Q: What does the 1 x 4:10 decoder configuration mean?

A: This indicates a single decoder circuit with 4 input lines and 10 output lines. The decoder converts a 4-bit binary input into one of 10 possible output states, commonly used for address decoding and logic signal distribution applications.

Q: Is the 16-DIP package suitable for modern PCB designs?

A: The 16-DIP through-hole package is compatible with standard PCB designs that support 0.300" (7.62mm) DIP spacing. While surface-mount alternatives exist in the 7400 series, the 16-DIP package remains widely used in legacy systems and applications requiring through-hole mounting.

Q: What is the operating temperature range for these decoders?

A: Both parts operate within the 0°C to 70°C temperature range, suitable for commercial and industrial applications. Extended temperature variants may be available under different part numbers if wider temperature ranges are required.