Texas Instruments CLVCH16T245MDGGREP

Overview

CLVCH16T245MDGGREP from Texas Instruments is a 16-bit dual-supply bus transceiver with configurable voltage translation and 3-state outputs, supporting bidirectional level shifting between 1.65 V–5.5 V rails on both A and B ports. It features bus-hold circuitry, Ioff partial-power-down support, VCC isolation, and operates across –55°C to 125°C. It is used in mixed-voltage FPGA-to-ASIC interconnects requiring robust signal integrity and rail independence.

For engineers reviewing the CLVCH16T245MDGGREP datasheet, CLVCH16T245MDGGREP pinout, CLVCH16T245MDGGREP application, or CLVCH16T245MDGGREP equivalent, key selection criteria include dual-rail voltage flexibility (1.65–5.5 V per port), guaranteed 32 mA drive strength at 4.5 V, bus-hold elimination of external resistors, VCC isolation for fault-tolerant power sequencing, and TSSOP-48 packaging compatible with high-density PCB layouts.

Technical Context

This device implements two independent 8-bit transceiver sections (1A↔1B and 2A↔2B), each controlled by dedicated DIR and OE pins referenced to VCCA. Direction control is asynchronous and noninverting: DIR = L enables B→A data flow; DIR = H enables A→B flow; OE = H forces both ports into high-impedance state regardless of DIR.

The input circuitry remains active on both ports at all times, requiring defined logic levels to avoid excess ICC/ICCZ. Bus-hold circuitry sustains idle inputs at valid logic states without external biasing, and Ioff protection disables outputs during power-down to prevent backflow current when either VCCA or VCCB is at GND.

Key Specifications

Pinout & Package

TSSOP-48 package (DGG), 12.6 mm × 6.2 mm × 1.2 mm max height, 0.5 mm pitch, RoHS-compliant NiPdAu lead finish, MSL Level-1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74AVCH16T245 and TXB0108PWR, CLVCH16T245MDGGREP uniquely combines 16-bit width, explicit DIR/OE control, bus-hold, Ioff, VCC isolation, and –55°C to +125°C qualification - making it the sole option for high-reliability, mixed-voltage, high-pin-count industrial and defense systems requiring deterministic control and fault tolerance.

Availability

CLVCH16T245MDGGREP is available at Aetrix Electronics and suitable for industrial PLC backplanes, avionics data concentrators, and medical imaging sensor hubs requiring stable component supply under extended temperature and long-lifecycle conditions.

Supply support for CLVCH16T245MDGGREP 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, with decades of heritage in precision logic and interface solutions.

The SN74LVCH16T245 product line delivers robust, dual-rail bus transceivers engineered for mission-critical applications in defense, aerospace, and industrial automation where voltage translation, power sequencing resilience, and extended temperature operation are mandatory.

FAQ

What is the maximum allowable voltage on CLVCH16T245MDGGREP I/O pins when VCCA or VCCB is unpowered?

The absolute maximum rating allows VI up to 6.5 V on any I/O pin regardless of supply state. However, with either VCCA or VCCB at GND, the VCC isolation feature forces all outputs into high-impedance mode, preventing damage. Input clamp current is limited to ±50 mA, and Ioff leakage remains ≤±2 μA - ensuring safe operation during hot-insertion or asymmetric power cycling scenarios involving CLVCH16T245MDGGREP.

Does CLVCH16T245MDGGREP require external pullup resistors on its control inputs (1DIR, 2DIR, 1OE, 2OE)?

No. All control inputs of CLVCH16T245MDGGREP are referenced to VCCA and have standard CMOS thresholds (VIH min = VCCA × 0.7, VIL max = VCCA × 0.3). The device does not integrate internal pullups on these pins, but external resistors are unnecessary if driven actively by a compatible logic source. TI recommends tying OE to VCCA through a pullup only during power-up to guarantee Hi-Z state - not for steady-state operation - and CLVCH16T245MDGGREP's datasheet confirms no pull resistors are needed for normal DIR/OE control.

Can CLVCH16T245MDGGREP translate between 1.8 V and 5 V logic levels bidirectionally in a single device?

Yes. CLVCH16T245MDGGREP supports true bidirectional voltage translation between 1.8 V and 5 V: configure VCCA = 1.8 V and VCCB = 5 V for A→B translation, or VCCA = 5 V and VCCB = 1.8 V for B→A translation. Its overvoltage-tolerant I/Os accept up to 6.5 V, and the control inputs remain referenced to VCCA - allowing CLVCH16T245MDGGREP to operate reliably across this full range without level-shifting circuitry.

How does bus-hold functionality work on CLVCH16T245MDGGREP, and does it affect timing?

CLVCH16T245MDGGREP integrates active bus-hold on all 32 data I/Os, sustaining idle inputs at their last-valid logic state using ±15 μA to ±100 μA feedback current. This eliminates external pull resistors without adding propagation delay - timing parameters (e.g., tPLH, tPHL) in the datasheet are measured with bus-hold enabled. Bus-hold does not interfere with driven signals and automatically disengages when an input is actively driven, making CLVCH16T245MDGGREP timing-predictable in both driven and undriven states.

Is CLVCH16T245MDGGREP pin-compatible with standard commercial SN74LVCH16T245 variants?

Yes. CLVCH16T245MDGGREP uses the same TSSOP-48 (DGG) package outline, pin assignment, and electrical behavior as the commercial SN74LVCH16T245, including identical pinout, function mapping, and AC/DC specifications. The "EP" suffix denotes enhanced product qualification (–55°C to +125°C, controlled baseline, traceability), but CLVCH16T245MDGGREP maintains full mechanical and functional compatibility - enabling drop-in replacement in existing designs requiring extended temperature or defense-grade assurance.