Texas Instruments 74FCT162240CTPACT

Overview

74FCT162240CTPACT from Texas Instruments is a 16-bit non-inverting three-state buffer/line driver with balanced 24-mA output drivers, designed for high-speed transmission-line driving in industrial bus interfaces. It operates at 5V ±10%, supports –40°C to +85°C ambient, delivers <0.6V ground bounce (VOLP), and achieves 4.3 ns max propagation delay.

For engineers reviewing the 74FCT162240CTPACT datasheet, 74FCT162240CTPACT pinout, 74FCT162240CTPACT application, or 74FCT162240CTPACT equivalent, key selection criteria include Ioff-enabled partial-power-down operation, flow-through pinout for PCB layout simplification, TSSOP-48 package compatibility, and low-noise drive capability for backplane and memory interface designs.

Technical Context

The 74FCT162240CTPACT implements dual 8-bit sections with independent active-low three-state enables (1OE, 2OE, 3OE, 4OE), enabling flexible 4-/8-/16-bit bus control. Its balanced 24-mA sink/source outputs incorporate integrated current-limiting resistors to suppress undershoot and reduce reliance on external termination.

Designed for noise-sensitive systems, it features edge-rate control circuitry, typical output skew <250 ps, and Ioff protection that disables outputs and blocks reverse current when VCC = 0 V - critical for hot-swap and mixed-voltage board architectures.

Key Specifications

Pinout & Package

74FCT162240CTPACT is housed in a 48-pin Thin Shrunk Small Outline Package (TSSOP), JEDEC MO-153 compliant, with 0.4 mm pitch (19.6-mil), body dimensions 12.5 mm × 6.1 mm × 1.2 mm max, and moisture sensitivity level (MSL) 1 (unlimited floor life at ≤30°C/60% RH).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-bit buffer applications.

Compared with CY74FCT162240TPVC, 74FCT162240CTPACT saves board space via TSSOP packaging; versus SN74FCT162240ATPACT, it trades 0.3 ns speed for cost optimization while retaining full functional and pin compatibility.

Availability

74FCT162240CTPACT is available at Aetrix Electronics and suitable for industrial control systems, programmable logic interfaces, memory subsystems, and high-reliability backplane applications requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74FCT162240CTPACT includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor leader delivering analog, embedded processing, and logic solutions for industrial, automotive, and communications markets.

The FCT logic family - including 74FCT162240CTPACT - was engineered for high-speed, low-noise bus interfacing in industrial and telecom infrastructure, emphasizing robustness, timing precision, and mixed-voltage interoperability.

FAQ

What is the maximum operating frequency supported by the 74FCT162240CTPACT?

The 74FCT162240CTPACT does not specify a maximum operating frequency directly, but its 4.3 ns maximum propagation delay supports reliable operation in bus systems with clock periods ≥8.6 ns - corresponding to effective data rates up to ~116 MHz for single-data-rate interfaces. System-level timing must account for board trace delays, loading, and setup/hold margins; actual usable frequency depends on layout and termination.

Does the 74FCT162240CTPACT support mixed-voltage operation between 3.3 V and 5 V logic domains?

No, the 74FCT162240CTPACT is a 5-V-only device specified for VCC = 5 V ±10% and TTL/CMOS input thresholds (VIH = 2.0 V min, VIL = 0.8 V max). It accepts 3.3-V logic-level inputs safely due to its 2.0-V VIH minimum, but its outputs swing rail-to-rail at 5 V and require level translation to interface with 3.3-V receivers. It is not designed for dual-supply or voltage-tolerant I/O operation.

How does the Ioff feature function in the 74FCT162240CTPACT during power-down sequences?

In the 74FCT162240CTPACT, the Ioff circuitry actively disables all outputs when VCC = 0 V, presenting high-impedance states regardless of input or enable pin voltages. This prevents current from flowing backward into the powered-down device from live buses - protecting both the 74FCT162240CTPACT and upstream drivers during partial power-down, hot-swap, or staggered supply sequencing in complex systems.

Can the 74FCT162240CTPACT be used as a level shifter between 5 V and 3.3 V systems?

The 74FCT162240CTPACT is not a bidirectional level shifter. It can accept 3.3-V inputs (since VIH min = 2.0 V), but its outputs swing to 5 V levels and may damage 3.3-V receivers. For safe 5 V → 3.3 V translation, external series resistors or dedicated level translators are required. The 74FCT162240CTPACT is intended for 5-V bus driving, not voltage domain bridging.

What is the thermal performance and power dissipation limit of the 74FCT162240CTPACT in continuous operation?

The 74FCT162240CTPACT has a maximum power dissipation rating of 1.0 W and a junction-to-ambient thermal resistance (θJA) of approximately 110°C/W in typical TSSOP-48 PCB mounting. At full 16-bit switching with 24-mA loads, quiescent + dynamic current draws under 5 mA total, resulting in <25 mW static power - well within thermal limits. No heatsink is required for industrial ambient conditions (≤85°C) with standard copper pour.