CD74ACT541EE4 Equivalent & Substitute Parts

Part Overview

The CD74ACT541EE4 is an 8-channel, non-inverting buffer logic integrated circuit manufactured by Texas Instruments. This device operates within a 4.5V to 5.5V supply voltage range and features 3-state output capability, making it suitable for bus-driving and signal buffering applications in digital logic systems. The part is currently in active production status with 1137 units available in new original inventory.

The CD74ACT541E, manufactured by Harris Corporation, represents a parametric equivalent alternative. However, the Harris variant has reached obsolete product status, necessitating evaluation of substitute options for long-term design reliability and supply chain continuity.

Substiute Parts

CD74ACT541EE4

Texas InstrumentsIn Stock: 1233CD74ACT541EE4 Datasheet

Current PartRFQ

CD74ACT541E

Harris CorporationIn Stock: 15136CD74ACT541E Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CD74ACT541EE4 is determined by strict parametric matching across the following critical criteria:

Functional Parameters: The substitute must be a Buffer, Non-Inverting logic device with exactly 1 element and 8 bits per element, maintaining 3-state output capability.

Electrical Parameters: Supply voltage range must be 4.5V to 5.5V. Output current specifications must be 24mA for both high and low states. Operating temperature range must span -55°C to 125°C.

Physical Parameters: Package must be 20-DIP with 0.300" (7.62mm) pitch. Mounting type must be Through Hole to ensure PCB compatibility.

Logic Family: The part must belong to the 74ACT series to ensure timing characteristics and noise immunity specifications align with the original design.

The CD74ACT541E meets all parametric requirements for substitution. However, its obsolete product status and RoHS non-compliance status require consideration in long-term supply planning.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection: The CD74ACT541EE4 from Texas Instruments is the recommended choice for new designs and ongoing production. This part maintains active product status, ensuring long-term availability and supply chain stability. The device is ROHS3 compliant, meeting current environmental and regulatory requirements for commercial and industrial applications.

Substitute Consideration: The CD74ACT541E from Harris Corporation is parametrically equivalent and functionally interchangeable at the electrical and mechanical level. However, this part has reached obsolete status, indicating discontinued production and limited remaining inventory. Additionally, the Harris variant is RoHS non-compliant, which may conflict with procurement policies or end-product regulatory requirements.

Compliance Factors: If RoHS compliance is a design requirement, the CD74ACT541EE4 is the only suitable option. For applications where RoHS compliance is not mandated, the CD74ACT541E remains electrically and mechanically compatible, provided existing inventory is available and supply chain risk is acceptable.

Frequently Asked Questions (FAQ)

Q: Can the CD74ACT541E be used as a direct replacement for the CD74ACT541EE4?

A: Yes, from an electrical and mechanical standpoint. Both devices are 8-channel, non-inverting buffers with 3-state outputs, identical supply voltage ranges (4.5V to 5.5V), matching output current specifications (24mA), and the same 20-DIP package. However, the CD74ACT541E is obsolete and RoHS non-compliant, which may present supply and regulatory concerns.

Q: What does "3-State Output" mean, and why is it important for substitution?

A: 3-State output means the device can produce three output conditions: logic high, logic low, and high-impedance (disconnected). This capability is essential for bus-sharing applications where multiple devices drive a common signal line. Substitutes must maintain this functionality to ensure circuit operation.

Q: Are there any differences in pin configuration between these parts?

A: No. Both the CD74ACT541EE4 and CD74ACT541E use the 20-DIP package with 0.300" (7.62mm) pitch. Pin assignments and functionality are identical, allowing direct socket substitution without PCB modification.

Q: Why is product status relevant to substitution decisions?

A: Active product status indicates ongoing manufacturing, quality control, and availability. Obsolete parts have discontinued production, making future procurement difficult or impossible. For long-term designs, active parts are preferred to avoid supply chain disruption.

Q: What is the significance of RoHS compliance in this comparison?

A: RoHS (Restriction of Hazardous Substances) compliance indicates the device meets environmental standards by restricting lead and other hazardous materials. ROHS3 compliance is required for many commercial, industrial, and consumer applications. The CD74ACT541EE4 is ROHS3 compliant; the CD74ACT541E is not. This difference may determine suitability based on end-product requirements.

Q: Can these parts operate in the same temperature range?

A: Yes. Both devices operate across -55°C to 125°C (TA), making them suitable for identical thermal environments. No temperature-related derating or adjustment is necessary when substituting between these parts.

Q: Is the 74ACT series designation important for substitution?

A: Yes. The 74ACT designation specifies the logic family, which defines electrical characteristics including propagation delay, noise immunity, and power consumption. Substitutes must remain within the same logic family to ensure timing and signal integrity specifications are maintained.