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

Texas Instruments SN74ALVTH162827LR

Name: SN74ALVTH162827LR
Brand: Texas Instruments
SKU: SN74ALVTH162827LR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SN74ALVTH162827LR

Manufacturer:: Texas Instruments

Category:: Buffers, Drivers, Receivers, Transceivers

Package:: 56-BSSOP (0.295", 7.50mm Width)

Datasheet:: SN74ALVTH162827LR.pdf

Description:: IC BUFFER NON-INVERT 3.6V 56SSOP

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Product details

Overview

SN74ALVTH162827LR from Texas Instruments is a 20-bit noninverting buffer/driver with 3-state outputs, designed for 2.5-V/3.3-V V_CC operation and mixed-mode 5-V TTL interface compatibility. It features bus-hold circuitry on all data inputs, integrated 30-Ω output series resistors, and auto 3-state functionality that disables outputs when Y exceeds V_CC + 0.5 V - enabling robust signal integrity in high-speed backplane and memory interface applications.

For engineers reviewing the SN74ALVTH162827LR datasheet, SN74ALVTH162827LR pinout, SN74ALVTH162827LR application, or SN74ALVTH162827LR equivalent, this device supports live insertion, provides high-impedance state during power-up/down (V_CC ≤ 1.2 V), and delivers sub-4 ns propagation delay (t_PHL/t_PLH) at 3.3 V with 50-pF load - critical for timing-sensitive 20-bit parallel bus designs.

Technical Context

The SN74ALVTH162827LR implements a dual 10-bit architecture with independent OE control per section (1OE1/1OE2 and 2OE1/2OE2), requiring both enables low to activate corresponding Y outputs. Its Advanced BiCMOS Technology (ABT) ensures low static power dissipation while supporting 5-V-tolerant inputs and outputs across 2.3–3.6-V V_CC.

Each output incorporates an equivalent 30-Ω series resistor to suppress overshoot/undershoot without external components, and bus-hold circuitry maintains valid logic levels on floating inputs - eliminating need for external pullup/pulldown resistors. Power-off output disable and ground-bounce mitigation (V_OLP < 0.8 V at 3.3 V) further enhance system-level reliability.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CC Range	2.3 V to 3.6 V - supports dual-voltage system interfacing and stable operation across industrial temperature range (–40°C to 85°C).
Input Voltage Tolerance	–0.5 V to 7 V - enables direct connection to 5-V TTL buses without level-shifting circuitry.
Output Drive Strength	I_OL = 12 mA / I_OH = –12 mA at 3.3 V - sufficient to drive standard 50-Ω transmission lines and multiple CMOS loads.
Propagation Delay	t_PHL/t_PLH = 1.5 ns to 3.7 ns (max) at 3.3 V, CL = 50 pF - meets timing requirements for high-speed 20-bit parallel data paths.
Bus-Hold Current	I_BHL = 75 µA / I_BHH = –75 µA at 3 V - actively sustains valid logic states on unused inputs, preventing metastability.
Power-Up Behavior	High-impedance state guaranteed for V_CC ≤ 1.2 V - prevents bus contention during power sequencing.
ESD Protection	≥2000 V HBM, ≥200 V MM, ≥1000 V CDM - exceeds JEDEC standards for handling and board-level robustness.

Pinout & Package

SN74ALVTH162827LR is packaged in a 56-pin Thin Very Small-Outline Package (TVSOP, DGV), measuring 11.4 mm × 4.5 mm × 1.2 mm max height, with gull-wing leads and JEDEC MO-194 compliance.

Pin/Terminal	Circuit Role	Design Meaning
1A1–1A10, 2A1–2A10	Data Inputs (20 total)	Noninverting input channels grouped into two 10-bit sections; each has bus-hold circuitry to prevent floating states.
1Y1–1Y10, 2Y1–2Y10	3-State Outputs (20 total)	Buffered, series-resistor-equipped outputs; enter high-Z when any associated OE is high or V_CC ≤ 1.2 V.
1OE1, 1OE2, 2OE1, 2OE2	Output Enable Controls	Active-low enables per 10-bit section; both OE signals must be low to activate respective Y outputs.
V_CC (Pins 7, 20, 36, 49)	Supply Voltage	Distributed power pins minimize switching noise; supports 2.3–3.6 V operation with mixed-mode 5-V I/O tolerance.
GND (Pins 4, 11, 27, 33, 43, 50)	Ground Reference	Multiple GND pins provide low-inductance return paths and reduce ground bounce in high-speed switching.

Key Features

Feature	Design Value
Auto 3-State	Outputs automatically enter high-impedance when output voltage exceeds V_CC + 0.5 V - eliminates external bus arbitration logic and prevents current loading during overvoltage events.
Integrated 30-Ω Series Resistors	Eliminates need for external termination resistors on PCB traces, reducing component count and layout complexity while controlling edge rates.
Live Insertion Support	Power-off output disable and high-Z behavior during power transitions allow safe hot-plug operation in modular backplane systems.
Flow-Through Pinout	Input-to-output signal path flows linearly across package (e.g., A1→Y1, A2→Y2), simplifying PCB routing and minimizing trace crossovers.
Mixed-Mode Signal Operation	Accepts 5-V inputs and drives 5-V loads while powered from 2.5 V or 3.3 V - enables seamless interconnection between legacy and modern voltage domains.

Applications

Memory Interface Buffering	Backplane Data Distribution
Use Scenario: Buffering address/data lines between a 3.3-V FPGA and 5-V SRAM or Flash memory in embedded control modules. IC Role / Device Role / Timing Role: Noninverting 20-bit buffer providing level translation, bus hold, and controlled edge rates to meet setup/hold timing margins. Use Value: Eliminates external pullups and series resistors while ensuring glitch-free operation during power sequencing and hot-swap events.	Use Scenario: Driving parallel control/status signals across a 20-bit backplane in modular test equipment with mixed-voltage card slots. IC Role / Device Role / Timing Role: High-speed 3-state driver enabling dynamic bus sharing among multiple plug-in modules via OE-controlled arbitration. Use Value: Sub-4 ns propagation delay and distributed V_CC/GND pins maintain signal integrity across long backplane traces at >50 MHz clock rates.
Industrial PLC I/O Expansion	Legacy System Interfacing
Use Scenario: Isolating and buffering 20-bit digital I/O from a 3.3-V microcontroller to 5-V industrial sensors and actuators in programmable logic controllers. IC Role / Device Role / Timing Role: Level-translating buffer with bus-hold protection against EMI-induced floating inputs in electrically noisy factory environments. Use Value: Prevents spurious toggling due to noise or open-circuit faults, improving system reliability without adding discrete protection components.	Use Scenario: Interfacing a modern 3.3-V SoC to legacy 5-V peripheral interfaces (e.g., ISA-style expansion buses) in medical diagnostic hardware. IC Role / Device Role / Timing Role: Bidirectional-capable buffer (with external direction control) supporting TTL-compatible signaling at full system speed. Use Value: Maintains backward compatibility without redesigning legacy PCBs or adding active level shifters - reduces time-to-market for upgrades.

Memory Interface Buffering

Backplane Data Distribution

Use Scenario: Buffering address/data lines between a 3.3-V FPGA and 5-V SRAM or Flash memory in embedded control modules.

IC Role / Device Role / Timing Role: Noninverting 20-bit buffer providing level translation, bus hold, and controlled edge rates to meet setup/hold timing margins.

Use Value: Eliminates external pullups and series resistors while ensuring glitch-free operation during power sequencing and hot-swap events.

Use Scenario: Driving parallel control/status signals across a 20-bit backplane in modular test equipment with mixed-voltage card slots.

IC Role / Device Role / Timing Role: High-speed 3-state driver enabling dynamic bus sharing among multiple plug-in modules via OE-controlled arbitration.

Use Value: Sub-4 ns propagation delay and distributed V_CC/GND pins maintain signal integrity across long backplane traces at >50 MHz clock rates.

Industrial PLC I/O Expansion

Legacy System Interfacing

Use Scenario: Isolating and buffering 20-bit digital I/O from a 3.3-V microcontroller to 5-V industrial sensors and actuators in programmable logic controllers.

IC Role / Device Role / Timing Role: Level-translating buffer with bus-hold protection against EMI-induced floating inputs in electrically noisy factory environments.

Use Value: Prevents spurious toggling due to noise or open-circuit faults, improving system reliability without adding discrete protection components.

Use Scenario: Interfacing a modern 3.3-V SoC to legacy 5-V peripheral interfaces (e.g., ISA-style expansion buses) in medical diagnostic hardware.

IC Role / Device Role / Timing Role: Bidirectional-capable buffer (with external direction control) supporting TTL-compatible signaling at full system speed.

Use Value: Maintains backward compatibility without redesigning legacy PCBs or adding active level shifters - reduces time-to-market for upgrades.

Equivalent & Alternatives

The following parts are listed as comparable options for similar 20-bit buffer/driver applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74ALVCH162827GR	Lower V_CC range (1.65–3.6 V); no 5-V input tolerance; lacks auto 3-state and bus-hold circuitry.	Suitable only for pure 3.3-V or lower-voltage systems without legacy 5-V interface requirements.	Select when cost reduction is prioritized over mixed-mode compatibility and bus stability features.
SN74LVC16244ADGGR	16-bit (not 20-bit); no bus-hold; 5-V tolerant inputs only (not outputs); no auto 3-state; higher I_OL (24 mA).	Requires external pullups for floating inputs and external series resistors for EMI control; limited to unidirectional 16-bit use cases.	Choose only if pin count and feature set align with simplified 16-bit subsystems lacking stringent live-insertion or noise immunity needs.

Compared with SN74ALVCH162827GR and SN74LVC16244ADGGR, the SN74ALVTH162827LR uniquely combines 20-bit width, 5-V I/O tolerance, bus-hold, auto 3-state, and integrated 30-Ω resistors - making it the sole option for robust, drop-in replacement in mixed-voltage, high-reliability parallel bus designs.

Availability

SN74ALVTH162827LR is available at Aetrix Electronics and suitable for memory interface buffering, backplane data distribution, industrial PLC I/O expansion, and legacy system interfacing requiring stable component supply and long-term obsolescence management.

Supply support for SN74ALVTH162827LR 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 expertise in high-reliability interface ICs for industrial and communications infrastructure.

The SN74ALVTH162827LR belongs to TI's ALVTH advanced logic family, engineered specifically for mixed-voltage system interoperability, live insertion, and noise-immune parallel bus operation in mission-critical embedded platforms.

FAQ

What is the operating temperature range for the SN74ALVTH162827LR?

The SN74ALVTH162827LR is characterized for industrial operation from –40°C to +85°C. This range ensures reliable performance in demanding environments such as factory automation controllers, telecom line cards, and transportation electronics where ambient temperatures fluctuate significantly. The device maintains specified timing and drive strength across this full range without derating.

Does the SN74ALVTH162827LR support 5-V inputs while powered from 3.3 V?

Yes, the SN74ALVTH162827LR supports 5-V-tolerant inputs across its full V_CC range (2.3 V to 3.6 V). Input voltage can reach up to 7 V (absolute max), and functional operation is guaranteed for VI = 0 to 5.5 V. This allows direct connection to legacy 5-V TTL buses without external level shifters - a core design feature of the ALVTH family.

How does the auto 3-state function work on the SN74ALVTH162827LR?

The auto 3-state function on the SN74ALVTH162827LR disables outputs when the output voltage exceeds V_CC + 0.5 V - for example, during hot-swap events or bus contention. This eliminates bus current loading without requiring external control logic. The feature operates independently of OE signals and remains active even when V_CC is powered, enhancing system-level fault tolerance.

What package type is used for the SN74ALVTH162827LR?

The SN74ALVTH162827LR uses the TVSOP (DGV) package - a 56-pin, 11.4 mm × 4.5 mm, 1.2 mm maximum height thin shrink small-outline package with gull-wing leads. It complies with JEDEC MO-194 and is optimized for high-density PCB layouts with excellent thermal and electrical performance in automated SMT assembly.

Can the SN74ALVTH162827LR replace older 74-series buffers in existing designs?

Yes, the SN74ALVTH162827LR is pin-compatible with industry-standard 56-pin widebus packages and offers enhanced functionality over legacy 74ACT/74ALS devices - including bus-hold, auto 3-state, and 5-V I/O tolerance. However, designers must verify OE logic mapping and confirm that the flow-through pinout matches existing layout routing before drop-in replacement.

SN74ALVTH162827LR Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: 74ALVTH

Package/Case:: 56-BSSOP (0.295", 7.50mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Logic Type:: Buffer, Non-Inverting

Number of Elements:: 2

Number of Bits per Element:: 10

Input Type:: -

Output Type:: 3-State

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

Voltage - Supply:: 2.3V ~ 2.7V, 3V ~ 3.6V

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 56-SSOP

SN74ALVTH162827LR FAQ

1.How can I place an order for SN74ALVTH162827LR through Aetrix?

Please submit a Request for Quotation (RFQ) for SN74ALVTH162827LR 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 SN74ALVTH162827LR reliable?

The price and inventory of SN74ALVTH162827LR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ALVTH162827LR is usually 5 days.

3.What payment methods are accepted for SN74ALVTH162827LR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74ALVTH162827LR transactions.

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4.How is shipping managed for SN74ALVTH162827LR?

SN74ALVTH162827LR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SN74ALVTH162827LR 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 SN74ALVTH162827LR?

For technical support, including SN74ALVTH162827LR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ALVTH162827LR requirements.

6.How does Aetrix verify that SN74ALVTH162827LR is sourced from the original manufacturer or authorized distributors?

All SN74ALVTH162827LR 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 SN74ALVTH162827LR meets industry standards.

7.What is the process for return or replacement of SN74ALVTH162827LR?

All SN74ALVTH162827LR units undergo pre-shipment inspection (PSI). If there is an issue with SN74ALVTH162827LR, 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 SN74ALVTH162827LR part is unused and in its original packaging.

Return procedure for SN74ALVTH162827LR:

1.Submit a request within 90 days.

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

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