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

STMicroelectronics 74LVTH16244TTR

Name: 74LVTH16244TTR
Brand: STMicroelectronics
SKU: 74LVTH16244TTR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 74LVTH16244TTR

Manufacturer:: STMicroelectronics

Category:: Buffers, Drivers, Receivers, Transceivers

Package:: 48-TFSOP (0.240", 6.10mm Width)

Datasheet:: 74LVTH16244TTR.pdf

Description:: IC BUF NON-INVERT 3.6V 48TSSOP

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Product details

Overview

74LVTH16244TTR from STMicroelectronics is a 16-bit non-inverting bus buffer with bus hold and power-up/down 3-state logic, designed for hot-insertion in 3.3V systems. It features 3.2ns max propagation delay at 3.0V/85°C, ±64mA output drive (low), 2.7–3.6V operating range, and pin/function compatibility with 74-series H16244.

For engineers reviewing the 74LVTH16244TTR datasheet, 74LVTH16244TTR pinout, 74LVTH16244TTR application, or 74LVTH16244TTR equivalent, this device supports high-speed 3.3V bus interfacing with integrated bus-hold, power-ramp-safe 3-state control, and ESD-protected I/O-critical for backplane, memory expansion, and hot-swap peripheral interfaces.

Technical Context

The 74LVTH16244TTR implements four independent 4-bit non-inverting buffers, each controlled by a dedicated active-low Output Enable (nG) input. Its BiCMOS architecture enables balanced tPLH/tPHL delays (≤3.2ns) and low ICC quiescent current (190µA max at 85°C).

Power-up/down 3-state circuitry guarantees high-impedance outputs when VCC is between 0–1.5V, preventing bus contention during supply ramping. Bus-hold inputs eliminate external pull resistors, maintaining valid logic states on floating data lines without additional components.

Key Specifications

Parameter	Value and Actual Design Meaning
Propagation Delay (tPD)	3.2ns max at VCC = 3.0V, TA = 85°C - ensures sub-4ns timing margin for 250MHz bus cycles
Supply Voltage Range	2.7V to 3.6V - compatible with standard 3.3V ±10% rail and tolerant of brown-out conditions
Output Drive (IOL)	64mA min at VCC = 3.0V - drives 10+ LVTTL loads or 50Ω transmission lines directly
Bus-Hold Current	±135µA at VI = 0.8V/2.0V - maintains stable logic state on un-driven inputs without external bias
Power-Up 3-State Threshold	Outputs enter Hi-Z when VCC ∈ [0V, 1.5V] - prevents conflict during hot-plug insertion before full power stabilization
ESD Protection	≥500mA latch-up immunity (JESD17) - withstands system-level ESD events in industrial environments
Input Compatibility	TTL-level VIH ≥ 2.0V, VIL ≤ 0.8V at 2.7–3.6V - interoperable with legacy 5V TTL outputs via level-shifting-free interface

Pinout & Package

TSSOP48 package: 48-pin thin shrink small outline package with 0.5mm pitch, body size 12.5 × 8.1 mm, lead coplanarity ≤0.1mm, RoHS-compliant matte tin finish.

Pin/Terminal	Circuit Role	Design Meaning
1, 24, 25, 48	1G, 2G, 3G, 4G	Active-low Output Enable controls four 4-bit buffer groups independently
2–23, 26–47	1A1–4, 2A1–4, 3A1–4, 4A1–4 / 1Y1–4, 2Y1–4, 3Y1–4, 4Y1–4	16 data inputs and 16 non-inverting buffered outputs; bus-hold enabled on all A pins
4, 10, 15, 21, 28, 34, 39, 45	GND	Eight ground connections distributed across package for low-inductance return paths and noise suppression
7, 18, 31, 42	VCC	Four VCC pins placed near I/O banks to minimize supply droop during simultaneous switching
27–30, 32, 33, 35–38, 40, 41, 43, 44, 46, 47	NC	No-connect pins (TFBGA-only); not bonded in TSSOP48 variant - electrically isolated

Key Features

Feature	Design Value
Power-Up/Down 3-State	Guaranteed Hi-Z when VCC ∈ [0V, 1.5V], eliminating bus contention during hot-swap or power sequencing
Integrated Bus Hold	Eliminates need for 10kΩ external pull-up/down resistors on data inputs, reducing BOM count and board area
High-Speed BiCMOS Logic	3.2ns max tPD at 3.0V enables reliable operation in >200MHz address/data buses with tight skew control (≤0.5ns)
TTL-Compatible Inputs	Accepts 5V-tolerant TTL signals (VIH ≥ 2.0V, VIL ≤ 0.8V) without level shifters - simplifies mixed-voltage system design
ESD & Latch-Up Robustness	Exceeds JESD17 latch-up immunity (≥500mA) and includes on-chip protection diodes for ±4.6V absolute max I/O voltage

Applications

Backplane Data Buffering

Hot-Swappable Module Interface

Use Scenario: Isolating and driving parallel data/address buses between plug-in cards and motherboard in telecom chassis.

IC Role / Device Role / Timing Role: Non-inverting 16-bit buffer with bus-hold and power-ramp-safe 3-state, synchronizing signal integrity across hot-plug events.

Use Value: Prevents bus contention during card insertion/removal and maintains valid logic states on floating lines without external biasing.

Use Scenario: Enabling safe insertion and removal of PCIe or CompactPCI peripheral modules while main system remains powered.

IC Role / Device Role / Timing Role: Directional bus isolator with guaranteed Hi-Z during VCC ramp (0–1.5V), acting as a power-sequencing gatekeeper.

Use Value: Eliminates need for complex power-supply monitoring circuits or discrete MOSFET switches for hot-swap isolation.

Memory Expansion Subsystem

Industrial I/O Controller Bus Interface

Use Scenario: Extending SRAM or Flash memory data/address bus width in embedded controllers with limited native I/O drive capability.

IC Role / Device Role / Timing Role: High-current (64mA) non-inverting driver buffering memory bus signals to meet setup/hold timing under capacitive load.

Use Value: Supports longer trace routing and higher fan-out (≥10 loads) without signal degradation or timing violations.

Use Scenario: Interfacing programmable logic controllers (PLCs) to fieldbus networks requiring robust 3.3V logic translation and noise immunity.

IC Role / Device Role / Timing Role: Level-translating bus buffer with ESD-hardened I/O and bus-hold, bridging microcontroller GPIO to noisy industrial backplanes.

Use Value: Reduces susceptibility to transients and eliminates floating-input faults in unconnected I/O channels during maintenance.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74LVC16244ADGGR	Lower drive (24mA IOL), no bus-hold, 1.65–3.6V VCC range, CMOS-only process	Lacks power-up 3-state guarantee and bus-hold; requires external pull resistors and careful power sequencing	Preferred where cost sensitivity outweighs hot-swap robustness and board space allows external biasing
74ALVCH16244TTR	Higher speed (2.3ns tPD), same bus-hold and power-up 3-state, but 2.3–3.6V VCC range and lower noise margin	Better timing margin for ultra-high-speed designs but reduced voltage headroom for brown-out resilience	Selected when sub-2.5ns propagation is mandatory and system operates strictly within 2.5–3.3V rails

Compared with SN74LVC16244ADGGR and 74ALVCH16244TTR, the 74LVTH16244TTR uniquely balances 3.2ns speed, 64mA drive, full 2.7–3.6V operation, and guaranteed power-ramp-safe 3-state - making it optimal for industrial hot-swap and legacy-TTL-interfaced 3.3V systems.

Availability

74LVTH16244TTR is available at Aetrix Electronics and suitable for backplane data buffering, hot-swappable module interfaces, and memory expansion subsystems requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74LVTH16244TTR 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, delivering innovative silicon solutions for automotive, industrial, and power management applications since 1987.

The 74LVTH series targets high-reliability 3.3V digital interfacing, combining BiCMOS speed with TTL compatibility and robustness for mission-critical hot-plug and backplane systems.

FAQ

Is the 74LVTH16244TTR pin-compatible with standard 74HCT16244 devices?

Yes - it is functionally and physically pin-compatible with 74HCT16244 in TSSOP48 package, retaining identical pin numbering, signal mapping, and 4-group OE structure. However, its 2.7–3.6V VCC range and bus-hold inputs differ from 4.5–5.5V HCT operation, requiring voltage domain verification in mixed-supply systems.

Does the bus-hold feature require external configuration or enable signals?

No - bus-hold is always active on all data inputs (A pins) and requires no external components, configuration registers, or enable signals. It functions automatically across the full operating temperature range (−40°C to +85°C) and supply range (2.7–3.6V), drawing only ±135µA per input at defined voltage thresholds.

What is the maximum capacitive load this device can drive while maintaining 3.2ns propagation delay?

The 3.2ns tPD specification is guaranteed under CL = 50pF (including probe/jig capacitance) and RL = 500Ω, per AC test conditions in the datasheet. Driving >50pF increases delay linearly; for 100pF loads, measured tPD rises to ~4.1ns. Layout best practices (short traces, ground plane) are essential to maintain timing integrity.

Can the 74LVTH16244TTR safely interface with 5V logic outputs without level shifters?

Yes - its inputs tolerate VIH ≥ 2.0V and VIL ≤ 0.8V over 2.7–3.6V VCC, matching standard TTL thresholds. While not 5V-tolerant in absolute max rating (VI absolute max = VCC + 0.5V), it reliably accepts 5V TTL outputs (VOH ≈ 3.5V, VOL ≈ 0.4V) without damage or logic error due to internal clamping and BiCMOS input structure.

74LVTH16244TTR Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: 74LVTH

Package/Case:: 48-TFSOP (0.240", 6.10mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Logic Type:: Buffer, Non-Inverting

Number of Elements:: 4

Number of Bits per Element:: 4

Input Type:: -

Output Type:: 3-State

Current - Output High, Low:: 32mA, 64mA

Voltage - Supply:: 2.7V ~ 3.6V

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 48-TSSOP

74LVTH16244TTR FAQ

1.How can I place an order for 74LVTH16244TTR through Aetrix?

Please submit a Request for Quotation (RFQ) for 74LVTH16244TTR 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 74LVTH16244TTR reliable?

The price and inventory of 74LVTH16244TTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVTH16244TTR is usually 5 days.

3.What payment methods are accepted for 74LVTH16244TTR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LVTH16244TTR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 74LVTH16244TTR?

74LVTH16244TTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 74LVTH16244TTR order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for 74LVTH16244TTR?

For technical support, including 74LVTH16244TTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVTH16244TTR requirements.

6.How does Aetrix verify that 74LVTH16244TTR is sourced from the original manufacturer or authorized distributors?

All 74LVTH16244TTR 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 74LVTH16244TTR meets industry standards.

7.What is the process for return or replacement of 74LVTH16244TTR?

All 74LVTH16244TTR units undergo pre-shipment inspection (PSI). If there is an issue with 74LVTH16244TTR, 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 74LVTH16244TTR part is unused and in its original packaging.

Return procedure for 74LVTH16244TTR:

1.Submit a request within 90 days.

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

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