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Texas Instruments SN74LVCR16245ADGG

Name: SN74LVCR16245ADGG
Brand: Texas Instruments
SKU: SN74LVCR16245ADGG
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SN74LVCR16245ADGG

Manufacturer:: Texas Instruments

Category:: Buffers, Drivers, Receivers, Transceivers

Package:: -

Datasheet:: SN74LVCR16245ADGG.pdf

Description:: IC BUS TRANSCVR 16BIT 48TSSOP

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Product details

Overview

SN74LVCR16245ADGG from Texas Instruments is a 16-bit dual-octal noninverting bus transceiver with 3-state outputs, designed for asynchronous bidirectional data transfer between 1.65–3.6-V buses. It features 5.5-V-tolerant inputs, 26-Ω integrated series output resistors, I_off support for live insertion, and a max propagation delay of 4.8 ns at 3.3 V. It enables mixed-voltage interfacing in server backplanes and telecom line cards.

For engineers reviewing the SN74LVCR16245ADGG datasheet, SN74LVCR16245ADGG pinout, SN74LVCR16245ADGG application, or SN74LVCR16245ADGG equivalent, this page delivers verified electrical specs, TSSOP-48 package mapping, functional mode truth table, real-world use cases in 3.3-V/5-V translation, and two validated alternative parts with documented technical differences.

Technical Context

The SN74LVCR16245ADGG implements two independent 8-bit bidirectional transceiver sections, each controlled by dedicated DIR and OE pins. Its logic-level translation capability stems from 5.5-V-tolerant inputs operating with V_CC as low as 1.65 V, enabling down-translation from 5-V peripherals to 3.3-V system buses.

Each I/O port includes integrated 26-Ω series resistors to dampen edge rates and suppress switching noise on long PCB traces or cables. The I_off circuitry actively disables outputs and blocks current flow when V_CC = 0 V, supporting partial-power-down and hot-swap operation without damaging backdrive currents.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CC Range	1.65 V to 3.6 V - Enables operation across LVTTL, LVCMOS, and mixed-supply systems.
Input Voltage Tolerance	Up to 5.5 V - Allows direct connection to 5-V logic without external level shifters.
Max Propagation Delay (t_pd)	4.8 ns at V_CC = 3.3 V - Supports high-speed data transfer up to ~200 MHz bus rates.
I_off Current	±10 µA at V_I/V_O = 5.5 V - Prevents destructive back-current during power sequencing or hot insertion.
Output Drive Strength	±12 mA at V_CC = 3.0 V - Sufficient to drive 50-Ω transmission lines or multiple CMOS loads.
Bus-Hold Circuitry	Integrated on all A/B ports - Eliminates need for external pull-up/down resistors on unused data lines.
ESD Rating	2000-V HBM - Meets industrial-grade robustness requirements per JESD22-A114.

Pinout & Package

TSSOP-48 package (DGG), 12.50 mm × 6.1 mm body size, 0.5-mm lead pitch, RoHS-compliant CU-NiPdAu finish, MSL Level-1.

Pin/Terminal	Circuit Role	Design Meaning
1DIR, 2DIR	Direction control input (active-high)	Selects data flow direction per 8-bit section: DIR = L → B-to-A; DIR = H → A-to-B.
1OE, 2OE	Output enable input (active-low)	Disables both A and B ports of respective section into high-impedance state when high.
A1–A8, B1–B8 (x2)	Bidirectional data I/O	16 total I/Os with 26-Ω series resistance; tolerate 5.5-V signals regardless of V_CC.
V_CC (Pins 7,18,31,42)	Power supply	Four distributed V_CC pins reduce IR drop and improve noise immunity across wide bus.
GND (Pins 4,10,15,21,28,34,39,45)	Ground reference	Eight GND pins provide low-inductance return paths for all 16 I/Os and internal logic.

Key Features

Feature	Design Value
Mixed-mode signal operation	5-V inputs/outputs compatible with 3.3-V V_CC - eliminates discrete level translators in heterogeneous systems.
Integrated 26-Ω series resistors	On all A/B port I/Os - reduces EMI and overshoot/undershoot without requiring external termination components.
I_off partial-power-down protection	Active at V_CC = 0 V - prevents current backflow from powered buses into unpowered device, enabling hot-plug capability.
Bus-hold circuitry	On all A/B inputs - maintains valid logic state on floating or undriven data lines, improving system reliability.
Low ground bounce (V_OLP)	<0.8 V at V_CC = 3.3 V - minimizes noise coupling into shared ground planes during simultaneous switching.

Applications

Server Backplane Interfacing	PC Chipset Expansion Bus
Use Scenario: Isolating and translating control/data signals between 5-V legacy peripherals and 3.3-V CPU/memory subsystems in rack-mounted servers. IC Role / Device Role / Timing Role: Bidirectional voltage-translating bus transceiver managing address/data strobes and control lines across power domains. Use Value: Enables interoperability without external level shifters while maintaining sub-5-ns timing margins for PCIe Gen1 sideband signals.	Use Scenario: Buffering and isolating LPC or SMbus signals between southbridge and Super I/O or embedded controller in notebooks. IC Role / Device Role / Timing Role: 3-state-enabled bidirectional transceiver providing bus arbitration and voltage domain bridging. Use Value: Reduces board space and BOM count by integrating 16-channel translation with built-in bus-hold and I_off protection.
Network Switch ASIC Interface	Telecom Line Card Data Path
Use Scenario: Interfacing FPGA-based packet processors with 5-V PHY devices in enterprise Ethernet switches. IC Role / Device Role / Timing Role: High-speed, low-skew bus transceiver handling parallel control/status registers and configuration data. Use Value: Delivers 4.8-ns t_pd and <0.8-V ground bounce to preserve signal integrity across 100+ mm FR4 traces.	Use Scenario: Bridging DSPs and analog front-end ASICs operating at different supply voltages in VoIP gateway line cards. IC Role / Device Role / Timing Role: Dual-section transceiver managing time-division multiplexed data streams and control handshaking. Use Value: Supports live insertion via I_off and eliminates need for external series resistors due to integrated 26-Ω drivers.

Server Backplane Interfacing

PC Chipset Expansion Bus

Use Scenario: Isolating and translating control/data signals between 5-V legacy peripherals and 3.3-V CPU/memory subsystems in rack-mounted servers.

IC Role / Device Role / Timing Role: Bidirectional voltage-translating bus transceiver managing address/data strobes and control lines across power domains.

Use Value: Enables interoperability without external level shifters while maintaining sub-5-ns timing margins for PCIe Gen1 sideband signals.

Use Scenario: Buffering and isolating LPC or SMbus signals between southbridge and Super I/O or embedded controller in notebooks.

IC Role / Device Role / Timing Role: 3-state-enabled bidirectional transceiver providing bus arbitration and voltage domain bridging.

Use Value: Reduces board space and BOM count by integrating 16-channel translation with built-in bus-hold and I_off protection.

Network Switch ASIC Interface

Telecom Line Card Data Path

Use Scenario: Interfacing FPGA-based packet processors with 5-V PHY devices in enterprise Ethernet switches.

IC Role / Device Role / Timing Role: High-speed, low-skew bus transceiver handling parallel control/status registers and configuration data.

Use Value: Delivers 4.8-ns t_pd and <0.8-V ground bounce to preserve signal integrity across 100+ mm FR4 traces.

Use Scenario: Bridging DSPs and analog front-end ASICs operating at different supply voltages in VoIP gateway line cards.

IC Role / Device Role / Timing Role: Dual-section transceiver managing time-division multiplexed data streams and control handshaking.

Use Value: Supports live insertion via I_off and eliminates need for external series resistors due to integrated 26-Ω drivers.

Equivalent & Alternatives

The following parts are listed as comparable options for similar bus transceiver applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74LVC16245A	No 5.5-V input tolerance; max VI = V_CC + 0.3 V; lacks integrated 26-Ω resistors and I_off.	Suitable only for same-voltage-domain 3.3-V systems; requires external termination and power sequencing care.	Choose only if cost sensitivity outweighs mixed-voltage and hot-swap requirements.
SN74AVC16245	Wider V_CC range (1.2–3.6 V); supports 1.2-V core logic; no I_off; lower drive (±12 mA @ 1.8 V).	Better suited for ultra-low-voltage mobile SoC interfaces; not rated for 5-V tolerant operation.	Select when interfacing 1.2/1.5-V logic; avoid where 5-V peripheral compatibility or live insertion is required.

Compared with SN74LVC16245A and SN74AVC16245, the SN74LVCR16245ADGG uniquely combines 5.5-V input tolerance, integrated 26-Ω resistors, and I_off protection-making it the only option among the three qualified for mixed 3.3-V/5-V backplane designs requiring hot-swap resilience.

Availability

SN74LVCR16245ADGG is available at Aetrix Electronics and suitable for server backplanes, telecom line cards, and PC chipset expansion buses requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for SN74LVCR16245ADGG 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 50 years of innovation in high-reliability interface ICs.

The SN74LVCR16245ADGG belongs to TI's Widebus™ family of advanced bus interface devices, engineered specifically for robust, low-noise, mixed-voltage data communication in enterprise infrastructure equipment.

FAQ

What is the maximum input voltage the SN74LVCR16245ADGG can tolerate?

The SN74LVCR16245ADGG accepts input voltages up to 5.5 V on all A- and B-port pins, regardless of V_CC value within its 1.65–3.6-V operating range. This allows safe interfacing with 5-V TTL or LVTTL sources without external clamping or level-shifting circuitry, as confirmed in Section 7.1 Absolute Maximum Ratings and Feature Description.

Does the SN74LVCR16245ADGG support hot-swap or live-insertion applications?

Yes, the SN74LVCR16245ADGG supports live insertion via its I_off feature, which disables outputs and blocks current backflow when V_CC = 0 V. Per Section 9.3 and Absolute Maximum Ratings, I_off leakage remains ≤±10 µA at 5.5-V applied inputs, protecting powered downstream buses during card insertion/removal.

How many independent transceiver sections does the SN74LVCR16245ADGG contain?

The SN74LVCR16245ADGG contains two independent 8-bit bidirectional transceiver sections (Section 1 and Section 2), each with dedicated DIR and OE controls. As stated in the Functional Block Diagram and Function Table, this allows flexible configuration as either one 16-bit or two separate 8-bit transceivers.

What is the purpose of the 26-Ω resistors integrated on all I/O pins of the SN74LVCR16245ADGG?

The 26-Ω series resistors on all A- and B-port I/Os slow output edge rates to reduce switching noise and electromagnetic interference caused by long PCB traces or cables. As described in Section 3 Description and Section 9.1 Overview, they eliminate the need for external termination resistors while suppressing ground bounce (V_OLP <0.8 V) and VOH undershoot (VOHV >2 V).

What package type and dimensions does the SN74LVCR16245ADGG use?

The SN74LVCR16245ADGG uses a TSSOP-48 (DGG) package measuring 12.50 mm × 6.1 mm with 0.5-mm lead pitch. Mechanical data in the Package Option Addendum confirms body size, MSL Level-1 rating, and Cu-NiPdAu lead finish - consistent across all active orderable variants including SN74LVCR16245ADGGR.

SN74LVCR16245ADGG Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: 74LVCR

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:: -

SN74LVCR16245ADGG FAQ

1.How can I place an order for SN74LVCR16245ADGG through Aetrix?

Please submit a Request for Quotation (RFQ) for SN74LVCR16245ADGG on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

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The price and inventory of SN74LVCR16245ADGG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVCR16245ADGG is usually 5 days.

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5.How can I obtain technical support or documentation for SN74LVCR16245ADGG?

For technical support, including SN74LVCR16245ADGG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVCR16245ADGG requirements.

6.How does Aetrix verify that SN74LVCR16245ADGG is sourced from the original manufacturer or authorized distributors?

All SN74LVCR16245ADGG 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 SN74LVCR16245ADGG meets industry standards.

7.What is the process for return or replacement of SN74LVCR16245ADGG?

All SN74LVCR16245ADGG units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVCR16245ADGG, 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 SN74LVCR16245ADGG part is unused and in its original packaging.

Return procedure for SN74LVCR16245ADGG:

1.Submit a request within 90 days.

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

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