74FCT162646CTPACT Equivalent & Substitute Parts

Part Overview

The 74FCT162646CTPACT is a non-inverting transceiver IC with 2 elements, 8 bits per element, and 3-state output capability in a 56-TSSOP package. Manufactured by Texas Instruments, this component operates at 4.5V to 5.5V supply voltage with output current ratings of 24mA for both high and low states. The device is classified as obsolete, making identification of equivalent and substitute parts essential for ongoing system support and new design implementations.

Substiute Parts

74FCT162646CTPACT

Texas InstrumentsIn Stock: 117274FCT162646CTPACT Datasheet

Current PartRFQ

SN74LVC16646ADGGR

Texas InstrumentsIn Stock: 2415SN74LVC16646ADGGR Datasheet

MFR RecommendedRFQ

74ACT16543DGGR

Texas InstrumentsIn Stock: 215274ACT16543DGGR Datasheet

Parametric EquivalentRFQ

74FCT162543ATPACT

Texas InstrumentsIn Stock: 108174FCT162543ATPACT Datasheet

Parametric EquivalentRFQ

74FCT162652CTPACT

Texas InstrumentsIn Stock: 98574FCT162652CTPACT Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 74FCT162646CTPACT is determined by the following critical parameters:

Functional Equivalence: Logic type (Transceiver, Non-Inverting), number of elements (2), and bits per element (8) must remain constant.

Electrical Compatibility: Output type (3-State), output current ratings (24mA high/low), and operating temperature range (-40°C ~ 85°C) must be maintained.

Package Compatibility: All substitutes must use the 56-TFSOP package with identical physical dimensions (0.240", 6.10mm Width).

Supply Voltage Consideration: The original part operates at 4.5V ~ 5.5V. Substitutes may operate at different voltage ranges provided they support the 4.5V ~ 5.5V range or are compatible with system requirements.

Substitute parts are grouped into two categories:

1. MFR Recommended Substitute: SN74LVC16646ADGGR operates at a lower voltage range (1.65V ~ 3.6V) but maintains all functional and electrical parameters. This part is active status and suitable for new designs requiring lower power operation.

2. Parametric Equivalents: 74ACT16543DGGR, 74FCT162543ATPACT, and 74FCT162652CTPACT maintain identical voltage supply range (4.5V ~ 5.5V) and all other critical parameters. These parts provide direct functional replacement.

Parameter Comparison

Engineering Selection Recommendations

For New Designs: SN74LVC16646ADGGR is the recommended substitute. This part is active status, ensuring long-term availability and supply chain stability. It maintains all functional and electrical parameters while operating at a lower voltage range (1.65V ~ 3.6V), providing flexibility for modern low-power system designs. ROHS3 compliance and MSL 1 rating confirm environmental and handling compatibility.

For Legacy System Maintenance: 74ACT16543DGGR provides direct parametric equivalence with active product status. This part maintains the original 4.5V ~ 5.5V supply voltage range and all electrical specifications, ensuring seamless integration into existing 5V systems.

For Inventory Continuity: 74FCT162543ATPACT and 74FCT162652CTPACT are parametric equivalents within the same 74FCT series. While both are obsolete status, they maintain identical electrical and functional specifications. These parts are suitable only for immediate replacement needs where supply is available.

All substitute parts are ROHS3 compliant and carry MSL 1 rating, confirming compliance with environmental regulations and moisture handling requirements equivalent to the original part.

Frequently Asked Questions (FAQ)

Q: Can SN74LVC16646ADGGR replace 74FCT162646CTPACT in a 5V system?

A: SN74LVC16646ADGGR operates at 1.65V ~ 3.6V supply voltage. Direct substitution in a 5V system is not possible without voltage regulation. However, if your system can operate at 3.3V or lower, this part provides full functional replacement with improved power efficiency.

Q: What is the difference between the 74FCT and 74LVC series?

A: The 74FCT series operates at 4.5V ~ 5.5V (TTL-compatible voltage), while the 74LVC series operates at 1.65V ~ 3.6V (CMOS-compatible voltage). Both maintain identical logic function, output current ratings, and package specifications. Series selection depends on system supply voltage requirements.

Q: Are all substitute parts pin-compatible with the original 74FCT162646CTPACT?

A: Yes. All substitute parts use the 56-TFSOP package with identical physical dimensions (0.240", 6.10mm Width) and maintain the same functional pin configuration for non-inverting transceiver operation with 2 elements and 8 bits per element.

Q: Why is 74FCT162646CTPACT marked as obsolete?

A: Obsolete status indicates the part is no longer in active production. SN74LVC16646ADGGR is the manufacturer-recommended active substitute, ensuring continued availability and support for new designs and legacy system maintenance.

Q: Do all substitute parts meet the same environmental compliance standards?

A: Yes. All substitute parts listed are ROHS3 compliant and carry MSL 1 (Unlimited) rating, matching the environmental and moisture sensitivity specifications of the original 74FCT162646CTPACT.

Q: Can I use 74ACT16543DGGR as a direct drop-in replacement?

A: Yes. 74ACT16543DGGR maintains identical supply voltage (4.5V ~ 5.5V), output current ratings (24mA), operating temperature range (-40°C ~ 85°C), and 56-TFSOP package specifications. It provides direct functional and electrical equivalence for 5V systems.