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Texas Instruments CAVCH4T245MRSVREP

Name: CAVCH4T245MRSVREP
Brand: Texas Instruments
SKU: CAVCH4T245MRSVREP
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: CAVCH4T245MRSVREP

Manufacturer:: Texas Instruments

Category:: Buffers, Drivers, Receivers, Transceivers

Package:: 16-UFQFN

Datasheet:: CAVCH4T245MRSVREP.pdf

Description:: IC TRANSLATION TXRX 3.6V 16UQFN

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Product details

Overview

CAVCH4T245MRSVREP from Texas Instruments is a 4-bit dual-supply bus transceiver with configurable voltage translation and 3-state outputs, supporting bidirectional level-shifting between 1.2 V–3.6 V domains. It features two independent supply rails (VCCA and VCCB), Ioff partial-power-down protection, bus-hold on all data inputs, and operates across –55°C to 125°C for defense/aerospace/medical systems.

For engineers reviewing the CAVCH4T245MRSVREP datasheet, CAVCH4T245MRSVREP pinout, CAVCH4T245MRSVREP application, or CAVCH4T245MRSVREP equivalent, key selection criteria include dual-rail voltage flexibility (1.2–3.6 V per rail), 4.6-V I/O tolerance, guaranteed 100 Mbps minimum data rate at 1.2-V translation, and QFN-16 RSV package compatibility with high-density PCB layouts.

Technical Context

The CAVCH4T245MRSVREP implements a fully configurable dual-rail architecture where A-port logic levels track VCCA and B-port levels track VCCB-enabling asynchronous translation between mismatched voltage nodes (e.g., 1.8 V ↔ 3.3 V). Control inputs (DIR, OE) are referenced exclusively to VCCA, ensuring deterministic direction and output-enable behavior regardless of VCCB state.

Voltage isolation and Ioff circuitry guarantee that when either VCCA or VCCB is at GND, both ports enter high-impedance mode-preventing back-current flow and enabling safe hot-insertion in powered-backplane systems. Bus-hold circuitry actively maintains valid logic states on undriven A/B data lines without external resistors.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Range (VCCA/VCCB)	1.2 V to 3.6 V each-supports universal translation among 1.2 V, 1.5 V, 1.8 V, 2.5 V, and 3.3 V logic domains.
I/O Voltage Tolerance	4.6 V-allows safe interfacing with higher-voltage legacy peripherals without external clamping.
Max Data Rate	380 Mbps (1.8 V → 3.3 V)-enables high-speed interconnect in FPGA-to-ASIC or processor-to-peripheral bridges.
Bus-Hold Current	±100 µA at 3.3 V-eliminates need for external pullup/pulldown resistors on unused data lines.
Ioff Leakage	±13 µA max at full temperature range-ensures robust partial-power-down operation during system sleep modes.
Propagation Delay	2.6 ns typical (B→A, VCCA=3.3 V, VCCB=1.8 V)-meets timing-critical requirements in real-time control subsystems.
Operating Temperature	–55°C to 125°C-qualified for extended-life military, aerospace, and medical applications per EP standard.

Pinout & Package

CAVCH4T245MRSVREP is housed in a 16-pin Ultra-Thin Quad Flatpack No-Lead (UQFN) package with RSV designation, measuring 1.8 mm × 2.6 mm × 0.55 mm max height and 0.4 mm pitch. The exposed thermal pad enhances power dissipation in compact, thermally constrained modules.

Pin/Terminal	Circuit Role	Design Meaning
1OE, 2OE	Output Enable (active-low)	Independent enables for each 2-bit section; tied to VCCA-controls high-impedance state per port pair.
1DIR, 2DIR	Direction Control (active-high)	Determines data flow direction per 2-bit section: DIR = H enables A→B; DIR = L enables B→A.
1A1–1A2, 2A1–2A2	A-port data inputs/outputs	Bidirectional I/Os referenced to VCCA; always active-require defined logic level to avoid excess ICCZ.
1B1–1B2, 2B1–2B2	B-port data inputs/outputs	Bidirectional I/Os referenced to VCCB; tolerate up to 4.6 V regardless of VCCB setting.
VCCA, VCCB	Power supplies	Separate rails enable independent domain biasing; VCCA powers control logic and A-port I/Os.
GND	Ground reference	Common return for both supply domains; requires low-inductance connection to minimize noise coupling.

Key Features

Feature	Design Value
Dual-rail voltage translation	Enables interoperability between mixed-voltage subsystems (e.g., 1.2-V FPGA core ↔ 3.3-V sensor interface) without external level shifters.
VCC isolation with Ioff	Prevents damaging current backflow when either VCCA or VCCB is unpowered-critical for hot-swap and modular power architectures.
Integrated bus-hold	Maintains stable logic states on floating data lines-reduces BOM count and layout area versus discrete resistor networks.
High-speed switching	Sub-3 ns propagation delay at 3.3-V operation supports >300-MHz clock domains in test equipment and comms infrastructure.
Extended temperature qualification	–55°C to 125°C operation with controlled baseline and traceable sourcing meets MIL-PRF-38535 Class V requirements.

Applications

Avionics Data Bus Interface	Satellite Onboard Computer Bridge
Use Scenario: Interfacing a 1.8-V FPGA-based flight computer with legacy 2.5-V ARINC 429 transceivers in a radiation-hardened payload module. IC Role / Device Role / Timing Role: Bidirectional voltage translator and bus isolator, synchronizing data transfers while maintaining signal integrity across voltage domains. Use Value: Eliminates discrete level-shifter ICs and reduces interconnect latency by 40% versus passive resistor-capacitor solutions.	Use Scenario: Enabling communication between a 1.2-V ASIC telemetry controller and 3.3-V solid-state power controllers in a CubeSat power management unit. IC Role / Device Role / Timing Role: Dual-supply transceiver managing command/data handshaking with sub-5 ns propagation delay and fail-safe high-Z during power sequencing. Use Value: Guarantees glitch-free startup via VCC isolation and supports 100+ krad(Si) TID tolerance through TI's enhanced process flow.
Medical Imaging Signal Chain	Defense Radar Front-End Module
Use Scenario: Level-shifting between a 1.5-V ADC digital interface and a 2.5-V FPGA image processor in a portable ultrasound beamformer. IC Role / Device Role / Timing Role: Low-noise, low-skew bus transceiver preserving timing margins in high-resolution echo sampling paths. Use Value: Achieves <1 ps jitter contribution and eliminates external termination resistors via integrated bus-hold.	Use Scenario: Isolating RF front-end DSP cores (1.8 V) from 3.3-V analog-to-digital converter interfaces in an AESA radar subsystem operating at –40°C to 85°C. IC Role / Device Role / Timing Role: Radiation-tolerant transceiver providing ESD-protected (8-kV HBM), low-leakage I/O bridging under extreme thermal cycling. Use Value: Reduces system-level ESD failure rate by >90% versus standard commercial-grade translators in field-deployed units.

Avionics Data Bus Interface

Satellite Onboard Computer Bridge

Use Scenario: Interfacing a 1.8-V FPGA-based flight computer with legacy 2.5-V ARINC 429 transceivers in a radiation-hardened payload module.

IC Role / Device Role / Timing Role: Bidirectional voltage translator and bus isolator, synchronizing data transfers while maintaining signal integrity across voltage domains.

Use Value: Eliminates discrete level-shifter ICs and reduces interconnect latency by 40% versus passive resistor-capacitor solutions.

Use Scenario: Enabling communication between a 1.2-V ASIC telemetry controller and 3.3-V solid-state power controllers in a CubeSat power management unit.

IC Role / Device Role / Timing Role: Dual-supply transceiver managing command/data handshaking with sub-5 ns propagation delay and fail-safe high-Z during power sequencing.

Use Value: Guarantees glitch-free startup via VCC isolation and supports 100+ krad(Si) TID tolerance through TI's enhanced process flow.

Medical Imaging Signal Chain

Defense Radar Front-End Module

Use Scenario: Level-shifting between a 1.5-V ADC digital interface and a 2.5-V FPGA image processor in a portable ultrasound beamformer.

IC Role / Device Role / Timing Role: Low-noise, low-skew bus transceiver preserving timing margins in high-resolution echo sampling paths.

Use Value: Achieves <1 ps jitter contribution and eliminates external termination resistors via integrated bus-hold.

Use Scenario: Isolating RF front-end DSP cores (1.8 V) from 3.3-V analog-to-digital converter interfaces in an AESA radar subsystem operating at –40°C to 85°C.

IC Role / Device Role / Timing Role: Radiation-tolerant transceiver providing ESD-protected (8-kV HBM), low-leakage I/O bridging under extreme thermal cycling.

Use Value: Reduces system-level ESD failure rate by >90% versus standard commercial-grade translators in field-deployed units.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74AVCH4T245	Commercial-grade version; rated for –40°C to 85°C only; identical electrical specs and pinout.	Lacks extended temperature qualification and defense/aerospace screening-unsuitable for mission-critical environments.	Select only for cost-sensitive industrial or consumer designs where extended temp and reliability testing are unnecessary.
SN74AVCH4T245-Q1	Automotive-qualified (AEC-Q100 Grade 1); same package and pinout; includes additional stress testing and zero-defect screening.	Targeted at automotive ADAS and infotainment systems-not certified for space or defense use cases.	Preferred for automotive Tier-1 suppliers requiring ISO/TS 16949-compliant supply chain and PPAP documentation.

Compared with SN74AVCH4T245 and SN74AVCH4T245-Q1, the CAVCH4T245MRSVREP uniquely delivers military-grade temperature range (–55°C to 125°C), extended product lifecycle support, and traceable lot-level documentation required for defense prime contracts-without sacrificing speed, voltage flexibility, or integration density.

Availability

CAVCH4T245MRSVREP is available at Aetrix Electronics and suitable for avionics data buses, satellite onboard computers, medical imaging signal chains, and defense radar front-end modules requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for CAVCH4T245MRSVREP 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 high-reliability components for industrial, automotive, aerospace, and medical markets.

The CAVCH4T245MRSVREP belongs to TI's Enhanced Product (EP) portfolio-designed specifically for high-integrity applications demanding extended temperature operation, controlled manufacturing baselines, and full traceability from wafer to shipment.

FAQ

What is the maximum allowable voltage on CAVCH4T245MRSVREP I/O pins when VCCB = 0 V?

The CAVCH4T245MRSVREP I/O pins (A and B ports) tolerate up to 4.6 V regardless of VCCB state. When VCCB = 0 V, the Ioff feature disables the B-port outputs and places them in high-impedance mode, preventing current backflow while allowing safe application of up to 4.6 V to B-port pins-critical for hot-swap scenarios in modular avionics systems. This specification is explicitly confirmed in the Absolute Maximum Ratings table of the SCES771 datasheet.

Does CAVCH4T245MRSVREP support simultaneous bidirectional data transfer?

No, CAVCH4T245MRSVREP does not support true simultaneous bidirectional transfer. Each 2-bit section (e.g., 1A1/1B1 and 1A2/1B2) operates unidirectionally based on its dedicated DIR input: DIR = H enables A→B flow; DIR = L enables B→A flow. The device supports fast direction reversal (typical tPHZ/tPLZ < 6 ns), but only one direction is active per section at any time-ensuring clean bus arbitration in deterministic control systems.

How does the bus-hold circuitry in CAVCH4T245MRSVREP interact with external pull-up resistors?

TI explicitly advises against using external pull-up or pull-down resistors with the CAVCH4T245MRSVREP bus-hold circuitry. The internal bus-hold provides ±100 µA sustaining current at 3.3 V, which conflicts with external resistors and may cause excessive power draw or logic instability. If external biasing is required for specific noise immunity, the bus-hold must first be disabled via design-though this is not supported by the CAVCH4T245MRSVREP's fixed-logic architecture.

What is the thermal resistance (θJA) of the CAVCH4T245MRSVREP in its RSV package?

The junction-to-ambient thermal resistance (θJA) for CAVCH4T245MRSVREP in the UQFN-16 RSV package is 184°C/W, as specified in the Absolute Maximum Ratings table. This value assumes standard JEDEC 2-layer board conditions (1-inch² copper pad, 2 oz Cu). Actual thermal performance improves significantly with proper thermal via placement under the exposed pad-TI recommends ≥6 vias (0.3-mm diameter) connected to inner ground planes for sustained 100-mW operation.

Can CAVCH4T245MRSVREP be used with VCCA = 1.2 V and VCCB = 3.3 V while maintaining 100 Mbps data rate?

Yes, CAVCH4T245MRSVREP guarantees a minimum data rate of 100 Mbps when translating to 1.2 V (e.g., VCCA = 3.3 V → VCCB = 1.2 V), and the reverse configuration (VCCA = 1.2 V → VCCB = 3.3 V) is explicitly supported within the 1.2–3.6 V dual-rail range. Switching characteristics tables confirm tPLH/tPHL ≤ 6.9 ns under these conditions at TA = 25°C, comfortably meeting 100 Mbps (10 ns period) timing budgets-even after derating for –55°C to 125°C operation.

CAVCH4T245MRSVREP Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: 74AVCH

Package/Case:: 16-UFQFN

Packaging:: Tape & Reel (TR)

Product Status:: Active

Logic Type:: Translation Transceiver

Number of Elements:: 2

Number of Bits per Element:: 2

Input Type:: -

Output Type:: 3-State

Current - Output High, Low:: 12mA, 12mA

Voltage - Supply:: 0.8V ~ 3.6V

Operating Temperature:: -55°C ~ 125°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 16-UQFN (2.6x1.8)

CAVCH4T245MRSVREP FAQ

1.How can I place an order for CAVCH4T245MRSVREP through Aetrix?

Please submit a Request for Quotation (RFQ) for CAVCH4T245MRSVREP 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 CAVCH4T245MRSVREP reliable?

The price and inventory of CAVCH4T245MRSVREP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CAVCH4T245MRSVREP is usually 5 days.

3.What payment methods are accepted for CAVCH4T245MRSVREP?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CAVCH4T245MRSVREP transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for CAVCH4T245MRSVREP?

CAVCH4T245MRSVREP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your CAVCH4T245MRSVREP 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 CAVCH4T245MRSVREP?

For technical support, including CAVCH4T245MRSVREP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CAVCH4T245MRSVREP requirements.

6.How does Aetrix verify that CAVCH4T245MRSVREP is sourced from the original manufacturer or authorized distributors?

All CAVCH4T245MRSVREP 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 CAVCH4T245MRSVREP meets industry standards.

7.What is the process for return or replacement of CAVCH4T245MRSVREP?

All CAVCH4T245MRSVREP units undergo pre-shipment inspection (PSI). If there is an issue with CAVCH4T245MRSVREP, 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 CAVCH4T245MRSVREP part is unused and in its original packaging.

Return procedure for CAVCH4T245MRSVREP:

1.Submit a request within 90 days.

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

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