CD74ACT245EE4 Equivalent & Substitute Parts

Part Overview

The CD74ACT245EE4 is an octal non-inverting bus transceiver manufactured by Texas Instruments, designed for bidirectional data transfer applications requiring 3-state output control. This device operates within the 74ACT logic family and is housed in a 20-pin DIP package suitable for through-hole mounting.

The CD74ACT245EE4 maintains Active product status with full RoHS3 compliance and REACH unaffected classification. Identifying equivalent substitute parts is necessary when the primary part becomes unavailable, when alternative sourcing is required for cost optimization, or when inventory constraints necessitate component alternatives that maintain identical electrical and mechanical specifications.

Substiute Parts

CD74ACT245EE4

Texas InstrumentsIn Stock: 913CD74ACT245EE4 Datasheet

Current PartRFQ

CD74ACT245E

Harris CorporationIn Stock: 1883CD74ACT245E Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the CD74ACT245EE4 are identified based on strict parametric equivalence within the following critical criteria:

Electrical Equivalence Requirements:

• Logic type: Transceiver, Non-Inverting
• Number of elements: 1
• Number of bits per element: 8
• Output type: 3-State
• Output current capability: 24mA (both high and low)
• Supply voltage range: 4.5V ~ 5.5V
• Operating temperature range: -55°C ~ 125°C

Mechanical Equivalence Requirements:

• Package type: 20-DIP (0.300", 7.62mm)
• Mounting type: Through Hole
• Series classification: 74ACT

Compliance Considerations:

• RoHS and REACH compliance status
• Product lifecycle status (Active vs. Obsolete)

Only parts matching all electrical and mechanical parameters are classified as parametric equivalents. Differences in manufacturer, product status, or compliance certifications do not disqualify a part from functional substitution but require engineering review based on application requirements.

Parameter Comparison

Engineering Selection Recommendations

The CD74ACT245E manufactured by Harris Corporation is a parametric equivalent to the CD74ACT245EE4. Both parts share identical electrical specifications, output current ratings, supply voltage requirements, operating temperature range, and physical package dimensions.

Selection Considerations Based on Provided Data:

The CD74ACT245EE4 (Texas Instruments) is the preferred selection for new designs and applications requiring active product support. This part maintains Active product status and full RoHS3 compliance, ensuring alignment with current regulatory requirements and long-term availability.

The CD74ACT245E (Harris Corporation) is classified as Obsolete and does not meet RoHS compliance standards. This part should be selected only when existing inventory constraints or legacy system requirements necessitate its use. Applications subject to RoHS regulations or requiring compliance documentation should not utilize this substitute.

Both parts are electrically and mechanically interchangeable within circuits designed for 74ACT transceiver operation. Pin configuration, signal timing, and functional behavior are identical across both devices.

Frequently Asked Questions (FAQ)

Q: Can the CD74ACT245E be used as a direct replacement for the CD74ACT245EE4?

A: The CD74ACT245E is electrically and mechanically equivalent to the CD74ACT245EE4. Both devices share identical logic type, bit configuration, output current capability, supply voltage range, operating temperature range, and 20-DIP package specifications. Direct substitution is possible from a functional standpoint. However, the CD74ACT245E is Obsolete and RoHS non-compliant, which may restrict its use in applications subject to regulatory requirements or requiring long-term support.

Q: What are the key parameters that determine substitution eligibility?

A: Substitution eligibility is determined by matching the following parameters: logic type (Transceiver, Non-Inverting), number of elements (1), bits per element (8), output type (3-State), output current ratings (24mA high and low), supply voltage range (4.5V ~ 5.5V), operating temperature range (-55°C ~ 125°C), package type (20-DIP), and mounting type (Through Hole). All substitute parts must match these specifications exactly.

Q: Are there any differences in pin configuration between the CD74ACT245EE4 and CD74ACT245E?

A: No. Both parts use the identical 20-DIP package with 0.300" (7.62mm) spacing. Pin configuration, signal assignments, and physical layout are identical. No PCB modifications are required for substitution.

Q: Why is the CD74ACT245E listed as Obsolete?

A: The CD74ACT245E is a Harris Corporation product that has reached end-of-life status. Obsolete classification indicates that the manufacturer no longer actively produces or supports this part. Existing inventory may be available through secondary sources, but new production is not available.

Q: What is the impact of RoHS compliance differences?

A: The CD74ACT245EE4 is RoHS3 compliant, meeting current environmental and hazardous substance restrictions. The CD74ACT245E is RoHS non-compliant, meaning it may contain restricted substances. Applications subject to RoHS regulations, export restrictions, or customer compliance requirements must use the RoHS3 compliant CD74ACT245EE4.

Q: Can both parts be used interchangeably in the same circuit?

A: From an electrical and mechanical standpoint, yes. Both parts operate identically within the specified voltage and temperature ranges and deliver the same output current. However, compliance and regulatory considerations may restrict the use of the Obsolete, RoHS non-compliant CD74ACT245E in certain applications.

Q: What is the base product number for these parts?

A: The base product number is 74ACT245, which identifies the core logic function and family. The CD74ACT245EE4 and CD74ACT245E are manufacturer-specific variants of this base product.