Texas Instruments CLXC8T245QDGSRQ1

Overview

CLXC8T245QDGSRQ1 from Texas Instruments is an AEC-Q100 qualified 8-bit dual-supply bus transceiver enabling bidirectional voltage level translation between 1.1 V and 5.5 V domains. It features configurable direction control (DIR), 3-state outputs (OE), Schmitt-trigger inputs, integrated dynamic pull-down resistors on I/Os, and static pull-downs on control inputs. Used in automotive infotainment head units and ADAS fusion systems for robust signal integrity across mixed-voltage subsystems.

For engineers reviewing the CLXC8T245QDGSRQ1 datasheet, CLXC8T245QDGSRQ1 pinout, CLXC8T245QDGSRQ1 application, or CLXC8T245QDGSRQ1 equivalent, key selection criteria include dual-rail supply flexibility (VCCA/VCCB = 1.1–5.5 V), guaranteed 420-Mbps up-translation (3.3 V → 5.0 V), Ioff-float isolation, and operation across –40°C to +125°C.

Technical Context

The CLXC8T245QDGSRQ1 implements a noninverting bidirectional translation architecture where A-port signals (Ax) and control logic (DIR, OE) are referenced to VCCA, while B-port signals (Bx) are referenced to VCCB. Each port supports independent supply voltages within 1.1 V to 5.5 V, enabling seamless interfacing between legacy 5-V microcontrollers and modern 1.2-V or 1.8-V sensors or FPGAs.

Its robust power sequencing handles VCCA/VCCB ramp-up/down order independence, and the VCC isolation feature forces all I/Os into high-impedance when either supply drops below 100 mV - critical for partial-power-down modes in automotive domain controllers. Schmitt-trigger inputs tolerate slow edges and noise up to ±0.4 V hysteresis.

Key Specifications

Pinout & Package

Packaged in a 24-pin TSSOP (PW) with 7.80 mm × 6.40 mm body size, the CLXC8T245QDGSRQ1 provides surface-mount compatibility for automotive PCBs requiring thermal reliability and reflow process stability.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74AVC8T245RHLR and TXS0108EPWR, the CLXC8T245QDGSRQ1 uniquely delivers AEC-Q100 Grade 1 qualification, full 1.1–5.5 V dual-rail flexibility, Ioff-float isolation, and 420-Mbps up-translation - making it the only drop-in solution for automotive domain controllers requiring mixed-voltage interoperability and functional safety compliance.

Availability

CLXC8T245QDGSRQ1 is available at Aetrix Electronics and suitable for automotive infotainment head units, ADAS sensor fusion hubs, body control modules, and powertrain communication gateways requiring stable component supply across extended lifecycle commitments.

Supply support for CLXC8T245QDGSRQ1 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 automotive ICs, with over 90 years of innovation in high-reliability electronic components.

The SN74LXC8T245-Q1 product line targets automotive domain controllers needing robust, configurable voltage translation across heterogeneous subsystems - designed specifically for ASIL-B compatible architectures with emphasis on power sequencing resilience and ESD hardening.

FAQ

What is the maximum supported data rate for CLXC8T245QDGSRQ1 in 3.3-V-to-5.0-V up-translation?

The CLXC8T245QDGSRQ1 supports up to 420 Mbps in 3.3 V → 5.0 V up-translation mode, as specified in Section 6.12 of the official datasheet. This performance is validated across the full automotive temperature range (–40°C to +125°C) and applies to single-channel operation with 50% duty cycle input signals meeting defined pulse width thresholds.

Does CLXC8T245QDGSRQ1 support partial power-down mode when one supply rail is disconnected?

Yes, CLXC8T245QDGSRQ1 supports partial power-down via its Ioff-float feature: if either VCCA or VCCB falls below 100 mV or becomes disconnected, all I/Os are first pulled low by internal dynamic resistors and then transition to high-impedance state - preventing backfeeding and ensuring system-level fault containment.

Can CLXC8T245QDGSRQ1 translate signals between 1.2-V and 5.0-V logic domains?

Yes, CLXC8T245QDGSRQ1 supports bidirectional translation between 1.2 V and 5.0 V domains. When VCCA = 1.2 V and VCCB = 5.0 V, it achieves up to 40 Mbps (Section 6.12); when VCCA = 5.0 V and VCCB = 1.2 V, down-translation supports up to 30 Mbps - both verified across –40°C to +125°C.

How does the Schmitt-trigger input functionality benefit CLXC8T245QDGSRQ1 in automotive applications?

The Schmitt-trigger inputs on CLXC8T245QDGSRQ1 provide hysteresis up to 1.06 V (at 5.5 V supply), enabling reliable detection of slow-rising mechanical switch signals and rejection of EMI-induced noise on long harnesses - eliminating need for external filtering and improving robustness in harsh automotive electromagnetic environments.

Is CLXC8T245QDGSRQ1 pin-compatible with standard SN74LVC8T245 variants?

No, CLXC8T245QDGSRQ1 is not pin-compatible with SN74LVC8T245. While both are 24-pin TSSOP transceivers, CLXC8T245QDGSRQ1 uses a distinct pinout: GND occupies pins 11, 12, and 13 (vs. single GND in LVC), and VCCB appears on pins 23 and 24 (vs. pin 24 only). Always verify against Figure 5-1 and Table 5-1 in the CLXC8T245QDGSRQ1 datasheet.