Texas Instruments 74FCT162H244CTPVCT

Overview

74FCT162H244CTPVCT from Texas Instruments is a 16-bit non-inverting bus-hold buffer/line driver with three-state outputs, designed for high-speed memory and bus interface applications. It features 24 mA balanced output drive, bus-hold on all data inputs (eliminating external pull resistors), Ioff partial-power-down support, and operates at 5V ±10% over –40°C to +85°C. Typical propagation delay is 4.1 ns, output skew <0.5 ns, and it uses a 48-pin SSOP package.

For engineers reviewing the 74FCT162H244CTPVCT datasheet, 74FCT162H244CTPVCT pinout, 74FCT162H244CTPVCT application, or 74FCT162H244CTPVCT equivalent, key selection criteria include bus-hold functionality for floating-input immunity, industrial-temperature-rated 24-mA balanced drive capability, TSSOP/SSOP package compatibility, and Ioff-enabled system-level power sequencing in mixed-voltage or hot-swap environments.

Technical Context

This device implements dual 8-bit or quad 4-bit configurable three-state buffering via independent OE controls (1OE–4OE), enabling flexible bus segmentation. Its bus-hold circuitry actively retains the last logic state on each A-input when driven high-impedance, preventing metastability without external biasing.

The output stage uses current-limited 24-mA drivers with edge-rate control to minimize ground bounce (<0.6 V typical VOLP) and EMI, while Ioff protection disables outputs and blocks reverse current flow during VCC ramp-down - critical for partial-power-down systems.

Key Specifications

Pinout & Package

74FCT162H244CTPVCT is housed in a 48-pin SSOP (Shrink Small Outline Package), 300-mil body width, JEDEC MO-153 compliant, with 0.635 mm pitch and gull-wing leads. Pin 1 marked by notch or dot; pin count and layout match industry-standard 48-pin bus buffers.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74FCT162H244CTPVCT, the 74FCT162H244ATPACT trades 0.7 ns speed for smaller TSSOP packaging, while the 74FCT162244CTPVCT removes bus-hold to reduce cost and simplify input design - making the original part uniquely suited for floating-input resilience in uncontrolled environments.

Availability

74FCT162H244CTPVCT is available at Aetrix Electronics and suitable for industrial control systems, telecom backplane interfaces, and legacy bus upgrade projects requiring stable component supply and long-term lifecycle assurance.

Supply support for 74FCT162H244CTPVCT 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 specializing in analog, embedded processing, and logic solutions, with decades of experience in industrial-grade interface ICs.

The 74FCT family was engineered for high-speed, low-noise 5-V bus interfacing in mission-critical industrial and communications infrastructure - prioritizing signal integrity, power sequencing robustness, and long-term manufacturability.

FAQ

What is the primary function of the bus-hold feature in the 74FCT162H244CTPVCT?

The bus-hold feature in the 74FCT162H244CTPVCT actively retains the last valid logic state on each data input (1A1–4A4) when the driving source goes high-impedance - eliminating the need for external pull-up or pull-down resistors. This prevents floating inputs that could cause undefined logic states, excessive current draw, or system lockup during power transitions or unconnected bus segments. The 74FCT162H244CTPVCT sustains this state with ±50 µA current, ensuring stability across its full industrial temperature range.

Does the 74FCT162H244CTPVCT support partial-power-down operation, and how is it implemented?

Yes, the 74FCT162H244CTPVCT supports partial-power-down via its Ioff circuitry. When VCC = 0 V, the outputs are disabled and leakage current is limited to ±1 µA maximum, preventing damaging reverse current flow from live bus lines into the unpowered device. This allows safe integration into multi-rail systems where subsystems power up/down independently - a key requirement for hot-swap capable industrial modules. The 74FCT162H244CTPVCT meets this specification across –40°C to +85°C without derating.

What are the key timing parameters of the 74FCT162H244CTPVCT, and how do they impact system design?

The 74FCT162H244CTPVCT guarantees a maximum propagation delay of 4.1 ns (tPLH/tPHL), output enable/disable times of 5.8 ns and 5.2 ns respectively, and output skew of ≤0.5 ns across all 16 outputs. These values enable reliable operation in 100+ MHz synchronous bus systems, allow tight setup/hold margin allocation in FPGA-to-memory interfaces, and ensure deterministic parallel data capture. The 74FCT162H244CTPVCT's low skew also simplifies PCB routing by reducing need for length-matching on Y-output traces.

Can the 74FCT162H244CTPVCT be used in place of standard 74FCT16244 devices, and what design changes are needed?

No direct substitution is recommended: the 74FCT162H244CTPVCT includes bus-hold circuitry not present in base 74FCT16244 variants, altering input biasing behavior. Replacing a standard 74FCT16244 with the 74FCT162H244CTPVCT eliminates external pull resistors but may cause unintended latching if inputs are actively driven low then released. Conversely, replacing the 74FCT162H244CTPVCT with a non-bus-hold variant requires adding 10-kΩ resistors to all A-inputs. Always verify input transition behavior in the target application before interchanging.

What package and thermal specifications apply to the 74FCT162H244CTPVCT?

The 74FCT162H244CTPVCT uses a 48-pin SSOP (O48) package, 300-mil width, with 0.635 mm lead pitch and JEDEC MO-153 compliance. Its thermal resistance (θJA) is 90°C/W (typical, JEDEC JESD51-7), and maximum junction temperature is +125°C. The device is rated for continuous operation from –40°C to +85°C ambient, with storage temperature spanning –55°C to +125°C. The 74FCT162H244CTPVCT's four dedicated GND pins and dual VCC pins help distribute heat and reduce thermal gradients across the die.