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

Texas Instruments SN74ALVCH162827DGGR

Name: SN74ALVCH162827DGGR
Brand: Texas Instruments
SKU: SN74ALVCH162827DGGR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SN74ALVCH162827DGGR

Manufacturer:: Texas Instruments

Category:: Buffers, Drivers, Receivers, Transceivers

Package:: -

Datasheet:: SN74ALVCH162827DGGR.pdf

Description:: BUS DRIVER, ALVC/VCX/A SERIES

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Product details

Overview

SN74ALVCH162827DGGR from Texas Instruments is a 20-bit noninverting buffer/driver with 3-state outputs, designed for 1.65-V to 3.6-V V_CC operation. It features two independent 10-bit sections (1A/1Y and 2A/2Y), dual output-enable inputs per section (1OE1/1OE2, 2OE1/2OE2), integrated bus-hold circuitry on all data inputs, and on-die 26-Ω series output resistors-enabling clean signal integrity in high-speed bus applications such as memory address/data buffering in industrial control backplanes.

For engineers reviewing the SN74ALVCH162827DGGR datasheet, SN74ALVCH162827DGGR pinout, SN74ALVCH162827DGGR application, or SN74ALVCH162827DGGR equivalent, key selection criteria include its dual-section 3-state control logic, bus-hold input stabilization, 12-mA sink capability, and TSSOP-56 (DGG) package compatibility with dense PCB layouts requiring low-voltage mixed-signal interfacing.

Technical Context

This device implements a dual 10-bit noninverting buffer architecture where each Y-output group activates only when both corresponding OE inputs are low-providing precise per-section output gating. The bus-hold circuitry maintains stable logic states on undriven A-inputs without external resistors, eliminating floating node risks in hot-swap or partial-connection scenarios.

Each output includes an integrated 26-Ω series resistor to suppress overshoot/undershoot during fast edge transitions, while maintaining full 3-state high-impedance behavior when disabled. Input thresholds scale with V_CC (e.g., VIH = 0.65×V_CC at 1.65 V), supporting robust level translation across 1.65–3.6 V domains.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CC Range	1.65 V to 3.6 V - Enables interoperability across 1.8-V, 2.5-V, and 3.3-V logic domains without level shifters.
Output Drive	±12 mA - Sinks up to 12 mA per Y-output, sufficient for driving 50-pF loads at ≤20-MHz toggle rates.
Propagation Delay	1.5 ns (min) at V_CC = 2.7 V - Supports sub-5-ns timing margins in high-speed address/data latching paths.
Bus-Hold Current	±45 µA at V_CC = 2.3 V - Actively holds unconnected A-inputs at valid logic levels, removing need for external pullups.
Input Capacitance	6 pF (data inputs) - Minimizes capacitive loading on upstream drivers, preserving signal rise/fall times.
Power Dissipation	16 pF (enabled outputs, CL = 50 pF, f = 10 MHz) - Low dynamic power enables use in thermally constrained modules.
ESD Rating	2000-V HBM - Meets industrial IEC 61000-4-2 system-level ESD immunity requirements.

Pinout & Package

TSSOP-56 (DGG) package: 14.0 mm × 6.1 mm × 1.2 mm body, 0.5-mm lead pitch, gull-wing leads, RoHS-compliant NiPdAu finish, MSL Level-1 (260°C peak reflow).

Pin/Terminal	Circuit Role	Design Meaning
1A1–1A10, 2A1–2A10	Data Inputs	20-bit parallel input bus; each has active bus-hold to prevent floating states during idle or disconnection.
1Y1–1Y10, 2Y1–2Y10	3-State Outputs	Corresponding noninverting buffered outputs; high-impedance when either OE pair is high.
1OE1, 1OE2, 2OE1, 2OE2	Output-Enable Controls	AND-gated enable logic per 10-bit section: both OE signals must be low to activate Y outputs.
V_CC (Pins 7, 26, 37, 56)	Supply	Four distributed V_CC pins reduce IR drop and improve noise immunity across wide bus structures.
GND (Pins 4, 17, 33, 46)	Ground	Four dedicated GND pins provide low-inductance return paths for switching currents from 20 outputs.

Key Features

Feature	Design Value
Integrated 26-Ω Output Series Resistors	Eliminates external termination components, reduces PCB area, and suppresses ringing on transmission lines >5 cm.
Bus-Hold on All Data Inputs	Maintains valid logic state on unused or disconnected A-inputs-no external pullup/pulldown resistors required.
Dual Independent 10-Bit Sections	Enables selective enabling of address vs. data buses or separate control of two memory banks without interdependence.
Low-Voltage Operation (1.65 V min)	Supports direct interface with modern low-power microcontrollers and FPGAs operating at 1.8 V core voltage.
Latch-Up Immunity >250 mA	Meets JESD17 Class II requirements, ensuring robustness against transient current faults in industrial environments.

Applications

Industrial Backplane Buffering	Memory Interface Expansion
Use Scenario: Interfacing a 32-bit microcontroller's address/data bus to multiple peripheral modules on a shared 20-line backplane. IC Role / Device Role / Timing Role: Noninverting 3-state buffer providing bidirectional bus isolation and drive strength enhancement for reliable multi-drop signaling. Use Value: Dual-section OE control allows independent gating of upper/lower address segments, reducing contention during DMA transfers.	Use Scenario: Expanding SRAM or Flash memory data bus width from 16-bit to 20-bit in embedded instrumentation systems. IC Role / Device Role / Timing Role: Data path repeater with controlled propagation delay (≤4.4 ns) and bus-hold protection during memory access arbitration. Use Value: On-die 26-Ω resistors ensure clean edges into 50-pF memory bus loads, eliminating need for discrete termination networks.
FPGA I/O Voltage Translation	Hot-Swappable Module Interface
Use Scenario: Level-shifting between a 2.5-V FPGA I/O bank and legacy 3.3-V peripheral logic in programmable logic controllers. IC Role / Device Role / Timing Role: Bidirectional voltage-tolerant buffer enabling safe 1.65–3.6-V domain bridging without direction control pins. Use Value: Input thresholds track V_CC, allowing stable recognition of 2.5-V logic highs even when powered from 3.3 V.	Use Scenario: Providing fault-isolated data connectivity between a main controller board and field-replaceable sensor modules. IC Role / Device Role / Timing Role: Bus-hold protected interface IC that prevents undefined states during module insertion/removal sequences. Use Value: Eliminates risk of metastability or latch-up during hot-plug events by holding inputs at last-valid state until firmware reinitializes.

Industrial Backplane Buffering

Memory Interface Expansion

Use Scenario: Interfacing a 32-bit microcontroller's address/data bus to multiple peripheral modules on a shared 20-line backplane.

IC Role / Device Role / Timing Role: Noninverting 3-state buffer providing bidirectional bus isolation and drive strength enhancement for reliable multi-drop signaling.

Use Value: Dual-section OE control allows independent gating of upper/lower address segments, reducing contention during DMA transfers.

Use Scenario: Expanding SRAM or Flash memory data bus width from 16-bit to 20-bit in embedded instrumentation systems.

IC Role / Device Role / Timing Role: Data path repeater with controlled propagation delay (≤4.4 ns) and bus-hold protection during memory access arbitration.

Use Value: On-die 26-Ω resistors ensure clean edges into 50-pF memory bus loads, eliminating need for discrete termination networks.

FPGA I/O Voltage Translation

Hot-Swappable Module Interface

Use Scenario: Level-shifting between a 2.5-V FPGA I/O bank and legacy 3.3-V peripheral logic in programmable logic controllers.

IC Role / Device Role / Timing Role: Bidirectional voltage-tolerant buffer enabling safe 1.65–3.6-V domain bridging without direction control pins.

Use Value: Input thresholds track V_CC, allowing stable recognition of 2.5-V logic highs even when powered from 3.3 V.

Use Scenario: Providing fault-isolated data connectivity between a main controller board and field-replaceable sensor modules.

IC Role / Device Role / Timing Role: Bus-hold protected interface IC that prevents undefined states during module insertion/removal sequences.

Use Value: Eliminates risk of metastability or latch-up during hot-plug events by holding inputs at last-valid state until firmware reinitializes.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74LVC16244ADGGR	No bus-hold; requires external pullups; 24-mA drive; 1.65–3.6-V V_CC.	Lacks input state retention-unsuitable for hot-swap or intermittent connection use cases.	Select when higher drive strength is needed and bus-hold is not required.
SN74AVC16T245DGGR	Bidirectional with direction control; no bus-hold; 12-mA drive; 1.2–3.6-V V_CC.	Requires additional direction-control signal routing; supports true bidirectional data flow.	Select for bidirectional data transfer (e.g., I²C expansion), not unidirectional buffering.

Compared with SN74ALVCH162827DGGR, SN74LVC16244ADGGR offers greater drive but no bus-hold, while SN74AVC16T245DGGR adds direction control at the cost of increased pin count and complexity-neither provides the same combination of dual-section 3-state gating and self-stabilizing inputs.

Availability

SN74ALVCH162827DGGR is available at Aetrix Electronics and suitable for industrial backplane buffering, memory interface expansion, FPGA I/O translation, and hot-swappable module interfaces requiring stable component supply across extended temperature ranges.

Supply support for SN74ALVCH162827DGGR 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 over 90 years of innovation in industrial, automotive, and communications electronics.

The SN74ALVCH162827DGGR belongs to TI's Widebus™ family of high-speed, low-voltage logic buffers-designed specifically for noise-immune, space-efficient bus interfacing in dense PCB environments.

FAQ

What is the minimum V_CC required for reliable operation of the SN74ALVCH162827DGGR?

The SN74ALVCH162827DGGR operates reliably from 1.65 V to 3.6 V. At 1.65 V, input thresholds are defined as VIH = 0.65×V_CC (≥1.07 V) and VIL = 0.35×V_CC (≤0.58 V), ensuring compatibility with 1.8-V logic families. Below 1.65 V, timing and drive performance are not guaranteed per datasheet specifications.

How does the bus-hold circuitry function on the SN74ALVCH162827DGGR inputs?

The SN74ALVCH162827DGGR integrates active bus-hold circuitry on all 20 A-inputs, drawing ±45 µA (at V_CC = 2.3 V) to maintain the last-valid logic state when inputs are floating or undriven. This eliminates external pullup/pulldown resistors and prevents metastability in partially connected or hot-swap scenarios.

Can the SN74ALVCH162827DGGR be used in bidirectional data paths?

No-the SN74ALVCH162827DGGR is a unidirectional noninverting buffer only. Its A inputs accept signals and Y outputs drive them; there is no direction-control pin or internal reverse path. For bidirectional applications, consider TI's SN74AVC16T245DGGR instead.

What is the recommended power-up sequence for the SN74ALVCH162827DGGR to ensure high-impedance outputs?

To guarantee high-impedance outputs during power-up, tie all OE inputs (1OE1, 1OE2, 2OE1, 2OE2) to V_CC via a pullup resistor. TI specifies a minimum resistance based on driver sink capability-typically ≥10 kΩ for standard CMOS drivers-to avoid contention while ensuring OE remains high until firmware asserts control.

Does the SN74ALVCH162827DGGR support hot-plug operation without external protection?

Yes-the SN74ALVCH162827DGGR's bus-hold inputs and latch-up immunity (>250 mA per JESD17) enable safe hot-plug operation in modular systems. However, OE pins must be held high (via pullup) during insertion to keep outputs in high-impedance state until host firmware initializes the interface.

SN74ALVCH162827DGGR 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:: -

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SN74ALVCH162827DGGR FAQ

1.How can I place an order for SN74ALVCH162827DGGR through Aetrix?

Please submit a Request for Quotation (RFQ) for SN74ALVCH162827DGGR 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 SN74ALVCH162827DGGR reliable?

The price and inventory of SN74ALVCH162827DGGR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ALVCH162827DGGR is usually 5 days.

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SN74ALVCH162827DGGR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SN74ALVCH162827DGGR 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 SN74ALVCH162827DGGR?

For technical support, including SN74ALVCH162827DGGR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ALVCH162827DGGR requirements.

6.How does Aetrix verify that SN74ALVCH162827DGGR is sourced from the original manufacturer or authorized distributors?

All SN74ALVCH162827DGGR 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 SN74ALVCH162827DGGR meets industry standards.

7.What is the process for return or replacement of SN74ALVCH162827DGGR?

All SN74ALVCH162827DGGR units undergo pre-shipment inspection (PSI). If there is an issue with SN74ALVCH162827DGGR, 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 SN74ALVCH162827DGGR part is unused and in its original packaging.

Return procedure for SN74ALVCH162827DGGR:

1.Submit a request within 90 days.

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

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