Texas Instruments CLVC8T245MRHLTEP

Overview

CLVC8T245MRHLTEP from Texas Instruments is an 8-bit dual-supply noninverting bus transceiver with configurable voltage translation and tri-state outputs. It supports bidirectional level shifting between 1.65 V and 5.5 V on both A and B ports, features VCC isolation, I_off protection, and operates across –55°C to 125°C. It enables reliable interface bridging in mixed-voltage industrial control and aerospace data buses.

For engineers reviewing the CLVC8T245MRHLTEP datasheet, CLVC8T245MRHLTEP pinout, CLVC8T245MRHLTEP application, or CLVC8T245MRHLTEP equivalent, key selection criteria include dual-rail supply flexibility (VCCA/VCCB = 1.65–5.5 V), guaranteed tri-state behavior during power sequencing, ±32 mA output drive at 5 V, and military-grade thermal performance (R_θJA = 36.2°C/W in RHL package).

Technical Context

The CLVC8T245MRHLTEP implements asynchronous bidirectional translation using separate VCCA- and VCCB-referenced I/O banks. Direction control (DIR) and output enable (OE) are referenced solely to VCCA, ensuring deterministic logic thresholds regardless of VCCB level. Its I_off circuitry actively disables outputs when either supply is at GND, preventing backflow current during partial power-down.

Functional modes are strictly defined by OE and DIR: OE = L + DIR = H enables A→B transmission; OE = L + DIR = L enables B→A transmission; OE = H forces both ports into high-impedance regardless of DIR state. Input circuits remain active at all times, requiring valid logic levels on all A/B pins to avoid excess ICCZ.

Key Specifications

Pinout & Package

VQFN-24 (RHL) package, 3.50 mm × 5.50 mm body, wettable flank terminals, 0.5 mm pitch, exposed thermal pad.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC8T245MDWREP and SN74LVC8T245MPWREP, the CLVC8T245MRHLTEP delivers superior thermal dissipation (36.2°C/W vs. ≥68.1°C/W) and smaller footprint (3.5×5.5 mm), making it optimal for thermally constrained, high-density aerospace and downhole modules where reliability under extreme temperature cycling is non-negotiable.

Availability

CLVC8T245MRHLTEP is available at Aetrix Electronics and suitable for industrial PLC backplanes, aerospace avionics data buses, and downhole oilfield instrumentation requiring stable component supply across extended product lifecycles.

Supply support for CLVC8T245MRHLTEP 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 ICs for industrial, automotive, and aerospace markets.

The SN74LVC8T245-EP product line delivers radiation-tolerant, extended-temperature bus transceivers designed specifically for mission-critical systems requiring guaranteed operation from –55°C to 125°C and robust power sequencing behavior.

FAQ

What voltage ranges does the CLVC8T245MRHLTEP support on its A and B ports?

The CLVC8T245MRHLTEP supports independent 1.65 V to 5.5 V operation on both the A port (VCCA-referenced) and B port (VCCB-referenced). This allows bidirectional translation between any combination of 1.8 V, 2.5 V, 3.3 V, and 5 V logic domains without external components. The CLVC8T245MRHLTEP datasheet specifies full functionality across this entire range at –55°C to 125°C.

How does the CLVC8T245MRHLTEP handle power sequencing when VCCA and VCCB are powered up at different times?

The CLVC8T245MRHLTEP incorporates VCC isolation: if either VCCA or VCCB is at GND, all outputs automatically enter high-impedance mode. This prevents bus contention during asymmetric power-up. For safe startup, TI recommends tying OE to VCCA via a pullup resistor - the CLVC8T245MRHLTEP remains in high-Z until both supplies stabilize and OE is actively driven low.

Does the CLVC8T245MRHLTEP provide protection against backflow current during partial power-down?

Yes. The CLVC8T245MRHLTEP integrates I_off circuitry that disables all I/O outputs when either VCCA or VCCB is at GND or floating, limiting reverse current to <±11 μA over temperature. This feature satisfies MIL-STD-1547 requirements and protects upstream drivers during controlled shutdown sequences in the CLVC8T245MRHLTEP's target applications.

What is the maximum data rate supported by the CLVC8T245MRHLTEP in a typical 3.3 V to 5 V translation setup?

In a 3.3 V (VCCA) to 5 V (VCCB) configuration, the CLVC8T245MRHLTEP achieves t_PLH/t_PHL ≤ 10.4 ns (max), supporting reliable operation up to 25 MHz for sustained data bursts. Timing margins must account for board trace capacitance and load; the CLVC8T245MRHLTEP's specified switching characteristics assume 15 pF load and 1 ns input rise/fall time per TI test conditions.

Is the CLVC8T245MRHLTEP pin-compatible with other packages in the SN74LVC8T245-EP family?

No. The CLVC8T245MRHLTEP uses the 24-pin VQFN (RHL) package with 0.5 mm pitch and an exposed thermal pad, differing mechanically and electrically from the SOIC (DW) and TSSOP (PW) variants. While functionally identical, PCB layout, thermal design, and soldering profiles must be validated separately for each package - the CLVC8T245MRHLTEP requires specific land pattern and reflow profile per JEDEC J-STD-020.