74FCT162240ATPACT Equivalent & Substitute Parts

Part Overview

The 74FCT162240ATPACT is a 4-element, 4-bit inverting buffer IC with 3-state output capability, designed for 5.5V logic applications. Manufactured by Texas Instruments in the 74FCT series, this component operates across a supply voltage range of 4.5V to 5.5V and is housed in a 48-TSSOP package. The device is classified as obsolete, making identification of compatible substitute parts essential for ongoing system support and new design implementations.

Substiute Parts

74FCT162240ATPACT

Texas InstrumentsIn Stock: 197974FCT162240ATPACT Datasheet

Current PartRFQ

SN74ALVCH16240DGGR

Texas InstrumentsIn Stock: 838SN74ALVCH16240DGGR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution compatibility for the 74FCT162240ATPACT is determined by the following critical parameters:

• Functional Architecture: 4-element, 4-bit inverting buffer with 3-state output configuration
• Output Drive Capability: 24mA output current (high and low)
• Package Compatibility: 48-TFSOP physical form factor
• Operating Temperature Range: -40°C to 85°C
• Electrical Interface: Pin-compatible 48-pin TSSOP package

The SN74ALVCH16240DGGR qualifies as a substitute based on identical functional topology, matching output drive specifications, compatible package geometry, and overlapping temperature operating range. The primary distinction lies in supply voltage specification: the substitute operates at 1.65V to 3.6V, representing a lower voltage variant suitable for modern low-power applications while maintaining electrical compatibility at the 3.3V interface level.

Parameter Comparison

Engineering Selection Recommendations

The SN74ALVCH16240DGGR is the manufacturer-recommended substitute for the obsolete 74FCT162240ATPACT. Selection of this substitute is supported by the following factors:

• Active Product Status: The substitute maintains active manufacturing status, ensuring long-term availability and supply chain continuity.
• Regulatory Compliance: Both components maintain ROHS3 compliance and REACH unaffected status, satisfying environmental and regulatory requirements.
• Functional Equivalence: Identical buffer architecture, element count, bit configuration, and output drive capability ensure direct functional replacement.
• Package Compatibility: Matching 48-TFSOP package dimensions enable direct PCB layout compatibility without redesign.
• Temperature Range Alignment: Identical operating temperature specifications (-40°C to 85°C) maintain thermal performance characteristics.

The voltage supply specification difference (4.5V–5.5V versus 1.65V–3.6V) reflects the substitute's design for lower-voltage logic systems. At 3.3V operation, the substitute provides full compatibility with modern digital systems while maintaining backward compatibility with 5V interfaces through appropriate level-shifting considerations in system design.

Frequently Asked Questions (FAQ)

Q: Can the SN74ALVCH16240DGGR directly replace the 74FCT162240ATPACT in a 5V system?

A: The SN74ALVCH16240DGGR operates at 1.65V to 3.6V supply voltage. Direct substitution in a 5V-only system requires verification that the system can tolerate 3.3V logic levels. The substitute is fully compatible with 3.3V systems and provides 5V tolerance at input stages in many applications.

Q: Are there any package differences between these parts?

A: Both components use the 48-TFSOP package with identical 0.240" (6.10mm) width specifications. Pin configuration and footprint are identical, enabling direct PCB replacement without layout modifications.

Q: What is the significance of the product status difference?

A: The 74FCT162240ATPACT is classified as obsolete, indicating discontinued manufacturing. The SN74ALVCH16240DGGR maintains active status, ensuring continued availability, technical support, and supply chain reliability for new designs and legacy system maintenance.

Q: Do both parts meet the same environmental and regulatory standards?

A: Yes. Both components are ROHS3 compliant, REACH unaffected, and carry identical moisture sensitivity level (MSL 1 - Unlimited) ratings, satisfying equivalent environmental and regulatory requirements.

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

A: Substitution is determined by functional architecture (4-element, 4-bit inverting buffer with 3-state output), output drive capability (24mA), package form factor (48-TFSOP), operating temperature range (-40°C to 85°C), and pin-compatible configuration. Supply voltage differences are secondary to these core compatibility criteria.