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Home > Products > Integrated Circuits (ICs) > Logic > Buffers, Drivers, Receivers, Transceivers

Texas Instruments 74FCT162H244ATPAC

Name: 74FCT162H244ATPAC
Brand: Texas Instruments
SKU: 74FCT162H244ATPAC
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 74FCT162H244ATPAC

Manufacturer:: Texas Instruments

Category:: Buffers, Drivers, Receivers, Transceivers

Package:: -

Datasheet:: 74FCT162H244ATPAC.pdf

Description:: BUS DRIVER, 4-BIT,

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Product details

Overview

74FCT162H244ATPAC from Texas Instruments is a 16-bit non-inverting 3-state buffer/line driver with bus-hold inputs, designed for memory and bus interface applications requiring high-speed signal integrity and low-power operation. It delivers 24 mA balanced output drive, supports I_off partial-power-down mode, operates at 5 V ±10%, and features typical propagation delay of 4.8 ns and output skew <0.5 ns.

For engineers reviewing the 74FCT162H244ATPAC datasheet, 74FCT162H244ATPAC pinout, 74FCT162H244ATPAC application, or 74FCT162H244ATPAC equivalent, this device is critical for stable 16-bit data path buffering in industrial backplanes, memory subsystems, and hot-swap-capable logic interfaces where floating input prevention and ground-bounce reduction are essential.

Technical Context

This device implements dual 8-bit sections (A/B and C/D) with independent 3-state enable controls (1OE–4OE), enabling flexible 4-bit, 8-bit, or full 16-bit bus operation. Its bus-hold circuitry actively retains the last valid logic state on each input when driven high-impedance, eliminating external pull resistors without adding propagation delay.

The 74FCT162H244ATPAC uses FCT logic with edge-rate control to limit slew rate, reducing simultaneous switching noise (SSN) and ground bounce (typical V_OLP <0.6 V). It complies with industrial temperature range (–40°C to +85°C), supports 5-V supply only, and integrates I_off protection to block current flow during partial power-down.

Key Specifications

Parameter	Value and Actual Design Meaning
VCC Supply	5 V ±10% - Fixed single-supply operation; not compatible with 3.3-V or mixed-voltage systems.
Propagation Delay (t_PLH/t_PHL)	4.8 ns max - Enables reliable timing in 100-MHz+ address/data buses with margin for setup/hold.
Output Drive	±24 mA balanced - Sufficient to drive 50-Ω transmission lines or high-capacitance loads without external termination.
Bus-Hold Current (I_BBH/I_BBL)	±50 µA - Maintains stable logic level during input float; eliminates need for 4.7-kΩ pull-up/down resistors per line.
I_off Protection	±1 µA at V_CC = 0 V - Prevents backflow current from live buses into powered-down subsystems, supporting safe hot-insertion.
ESD Rating	>2000 V HBM - Robust handling during board assembly and field service without additional protection circuitry.
Operating Temperature	–40°C to +85°C - Qualified for industrial environments including factory automation and telecom infrastructure.

Pinout & Package

74FCT162H244ATPAC is housed in a 48-pin TSSOP (Thin Shrunk Small Outline Package) with 0.4-mm pitch (19.6-mil), JEDEC MO-153 compliant, body dimensions 12.6 × 6.2 mm, and 1.2-mm max height. Pin 1 marked by beveled corner; pins numbered counterclockwise.

Pin/Terminal	Circuit Role	Design Meaning
1A1–1A4, 2A1–2A4, 3A1–3A4, 4A1–4A4 (Pins 1–4, 7–10, 13–16, 19–22)	Data Inputs	All 16 inputs feature bus-hold; retain last logic state when un-driven - no external biasing required.
1Y1–1Y4, 2Y1–2Y4, 3Y1–3Y4, 4Y1–4Y4 (Pins 5–6, 11–12, 17–18, 23–24)	3-State Outputs	Non-inverting outputs; high-impedance when corresponding OE is HIGH - enables shared bus arbitration.
1OE–4OE (Pins 25, 27, 37, 39)	Active-Low Output Enables	Independent control per 4-bit group - supports granular bus partitioning and power-gating.
VCC (Pins 26, 38, 47)	Power Supply	Three dedicated VCC pins reduce IR drop and improve noise immunity across wide 16-bit output banks.
GND (Pins 28, 36, 45, 48)	Ground	Four GND pins provide low-inductance return paths - critical for minimizing ground bounce in high-speed switching.

Key Features

Feature	Design Value
Bus-hold inputs	Eliminates 16 external pull resistors, reduces BOM cost and PCB area, prevents metastability from floating inputs.
I_off partial-power-down	Enables safe integration into modular systems where one board powers down while others remain active on shared bus.
Edge-rate controlled outputs	Reduces EMI and crosstalk by limiting dV/dt; measured ground bounce <0.6 V ensures signal integrity on dense backplanes.
Flow-through pinout	Input-to-output alignment simplifies PCB routing - A1→Y1 adjacent, minimizing trace length and stub effects.
Industrial temperature rating	Validated operation from –40°C to +85°C - suitable for uncontrolled environments like motor drives and outdoor base stations.

Applications

Memory Interface Buffering	Industrial Backplane Driver
Use Scenario: Driving 16-bit address/data lines between microcontroller and SRAM/Flash in programmable logic controllers. IC Role / Device Role / Timing Role: Non-inverting 3-state buffer with bus-hold - maintains valid address during CPU wait states and prevents bus contention during reset. Use Value: Eliminates need for 16 pull-up resistors; 4.8-ns delay supports >100-MHz burst transfers; I_off protects memory during firmware update power cycles.	Use Scenario: Interfacing multiple I/O modules to a central controller via shared 16-bit parallel backplane in factory automation racks. IC Role / Device Role / Timing Role: High-drive line driver with edge-rate control - ensures clean signal edges across 30-cm traces with multiple stubs. Use Value: ±24 mA drive sustains logic levels under 30-pF load per line; low ground bounce (<0.6 V) prevents false triggering in adjacent digital channels.
Hot-Swappable Module Interface	Legacy Bus Signal Conditioning
Use Scenario: Buffering control signals in modular telecom line cards that support live insertion/removal without system reboot. IC Role / Device Role / Timing Role: Isolation buffer with I_off and bus-hold - blocks backfeed current during card removal and holds last command state until reconnection. Use Value: I_off leakage <1 µA prevents damage to host backplane; bus-hold retains configuration bits (e.g., module ID) during disconnection.	Use Scenario: Adapting TTL-level peripherals (e.g., legacy printers, test equipment) to modern 5-V microcontroller GPIOs with noise immunity. IC Role / Device Role / Timing Role: Level-shifting and noise-filtering buffer - converts marginal input thresholds to robust CMOS-compatible levels. Use Value: Input hysteresis (100 mV) rejects line noise; 24-mA drive overcomes long cable capacitance; bus-hold prevents spurious resets from unterminated cables.

Memory Interface Buffering

Industrial Backplane Driver

Use Scenario: Driving 16-bit address/data lines between microcontroller and SRAM/Flash in programmable logic controllers.

IC Role / Device Role / Timing Role: Non-inverting 3-state buffer with bus-hold - maintains valid address during CPU wait states and prevents bus contention during reset.

Use Value: Eliminates need for 16 pull-up resistors; 4.8-ns delay supports >100-MHz burst transfers; I_off protects memory during firmware update power cycles.

Use Scenario: Interfacing multiple I/O modules to a central controller via shared 16-bit parallel backplane in factory automation racks.

IC Role / Device Role / Timing Role: High-drive line driver with edge-rate control - ensures clean signal edges across 30-cm traces with multiple stubs.

Use Value: ±24 mA drive sustains logic levels under 30-pF load per line; low ground bounce (<0.6 V) prevents false triggering in adjacent digital channels.

Hot-Swappable Module Interface

Legacy Bus Signal Conditioning

Use Scenario: Buffering control signals in modular telecom line cards that support live insertion/removal without system reboot.

IC Role / Device Role / Timing Role: Isolation buffer with I_off and bus-hold - blocks backfeed current during card removal and holds last command state until reconnection.

Use Value: I_off leakage <1 µA prevents damage to host backplane; bus-hold retains configuration bits (e.g., module ID) during disconnection.

Use Scenario: Adapting TTL-level peripherals (e.g., legacy printers, test equipment) to modern 5-V microcontroller GPIOs with noise immunity.

IC Role / Device Role / Timing Role: Level-shifting and noise-filtering buffer - converts marginal input thresholds to robust CMOS-compatible levels.

Use Value: Input hysteresis (100 mV) rejects line noise; 24-mA drive overcomes long cable capacitance; bus-hold prevents spurious resets from unterminated cables.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
74FCT162244ATPACT	No bus-hold; 24-mA balanced outputs; identical speed (4.8 ns) and package.	Requires external pull resistors on all 16 inputs; higher BOM count and layout complexity.	Select when bus-hold is unnecessary and cost-per-resistor matters more than design simplicity.
SN74LVCH16244ADGGR	3.3-V operation only; 32-mA drive; no I_off; LVCMOS input thresholds.	Not pin-compatible; incompatible with 5-V buses; requires level translation for legacy systems.	Select only for new 3.3-V designs prioritizing ultra-low static current (<10 µA) over 5-V interoperability.

Compared with 74FCT162H244ATPACT, the 74FCT162244ATPACT saves component cost but increases layout risk from floating inputs, while SN74LVCH16244ADGGR offers lower voltage operation but breaks compatibility with existing 5-V infrastructure - making 74FCT162H244ATPAC the optimal choice for industrial upgrades requiring zero-input-bias reliability.

Availability

74FCT162H244ATPAC is available at Aetrix Electronics and suitable for industrial backplane drivers, memory interface buffering, hot-swappable module interfaces, and legacy bus signal conditioning requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74FCT162H244ATPAC 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 heritage in high-reliability industrial and automotive ICs.

The 74FCT162H244ATPAC belongs to TI's FCT logic family, engineered specifically for noise-immune, high-speed 5-V bus interfacing in demanding industrial environments where signal integrity and power-down safety are non-negotiable.

FAQ

What is the function of bus-hold circuitry in the 74FCT162H244ATPAC?

The bus-hold circuitry in the 74FCT162H244ATPAC actively maintains the last valid logic state (HIGH or LOW) on each of its 16 input pins when the driving source becomes high-impedance. This eliminates the need for external pull-up or pull-down resistors, preventing undefined states and system glitches. The 74FCT162H244ATPAC achieves this with ±50 µA sustain current per input, ensuring stable operation during hot-swap events or processor reset sequences.

Does the 74FCT162H244ATPAC support mixed-voltage operation?

No, the 74FCT162H244ATPAC operates exclusively at 5 V ±10% and is not compatible with 3.3-V or other supply voltages. Its input thresholds (V_IL = 0.8 V, V_VIH = 2.0 V) and output drive characteristics are specified only for V_CC = 4.5 V to 5.5 V. Using the 74FCT162H244ATPAC outside this range may cause functional failure or accelerated wear.

How does I_off protection work in the 74FCT162H244ATPAC?

The I_off circuitry in the 74FCT162H244ATPAC disables all outputs and blocks current flow through the device when V_CC = 0 V, even if input or output pins are driven to valid logic levels by external sources. This prevents damaging back-current from live buses into a powered-down subsystem. Measured I_off leakage is ±1 µA, enabling safe hot-plug operation in modular 74FCT162H244ATPAC-based systems.

What is the maximum capacitive load the 74FCT162H244ATPAC can drive reliably?

The 74FCT162H244ATPAC is characterized to drive up to 30 pF per output while maintaining specified timing (4.8 ns max propagation delay) and noise performance (V_OLP <0.6 V). Its ±24 mA balanced output drive supports controlled-impedance transmission lines and mitigates ringing on longer traces. For loads exceeding 30 pF, derating of timing margins and verification of ground bounce in the 74FCT162H244ATPAC application is recommended.

Is the 74FCT162H244ATPAC RoHS-compliant and lead-free?

Yes, the 74FCT162H244ATPAC is RoHS-compliant and lead-free, meeting the "Green (RoHS & no Sb/Br)" eco-plan standard per TI's packaging documentation. It uses Cu-Ni-Pd-Au (Cu NIPDAU) lead finish and is rated MSL Level-1 (unlimited floor life at ≤30°C/60% RH), suitable for standard Pb-free reflow profiles up to 260°C peak temperature.

74FCT162H244ATPAC Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: *

Package/Case:: -

Packaging:: Bulk

Product Status:: Active

Logic Type:: -

Number of Elements:: -

Number of Bits per Element:: -

Input Type:: -

Output Type:: -

Current - Output High, Low:: -

Voltage - Supply:: -

Operating Temperature:: -

Grade:: -

Qualification:: -

Mounting Type:: -

Supplier Device Package:: -

74FCT162H244ATPAC FAQ

1.How can I place an order for 74FCT162H244ATPAC through Aetrix?

Please submit a Request for Quotation (RFQ) for 74FCT162H244ATPAC on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for 74FCT162H244ATPAC reliable?

The price and inventory of 74FCT162H244ATPAC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74FCT162H244ATPAC is usually 5 days.

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Once your 74FCT162H244ATPAC order is processed, you will receive an email with the shipment details and tracking number.

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5.How can I obtain technical support or documentation for 74FCT162H244ATPAC?

For technical support, including 74FCT162H244ATPAC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74FCT162H244ATPAC requirements.

6.How does Aetrix verify that 74FCT162H244ATPAC is sourced from the original manufacturer or authorized distributors?

All 74FCT162H244ATPAC products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that 74FCT162H244ATPAC meets industry standards.

7.What is the process for return or replacement of 74FCT162H244ATPAC?

All 74FCT162H244ATPAC units undergo pre-shipment inspection (PSI). If there is an issue with 74FCT162H244ATPAC, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The 74FCT162H244ATPAC part is unused and in its original packaging.

Return procedure for 74FCT162H244ATPAC:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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