Texas Instruments SN74AVCH24T245NMUR

Overview

SN74AVCH24T245NMUR from Texas Instruments is a 24-bit dual-supply bus transceiver with configurable voltage translation, 3-state outputs, and full 1.2-V to 3.6-V dual-rail operation on both A and B ports. It supports bidirectional level-shifting between 1.2 V, 1.5 V, 1.8 V, 2.5 V, and 3.3 V domains, delivers up to 380 Mbps (1.8-V→3.3-V), and features VCC isolation, I_off, and bus-hold for robust low-voltage interconnect in mixed-supply SoC interfaces.

For engineers reviewing the SN74AVCH24T245NMUR datasheet, SN74AVCH24T245NMUR pinout, SN74AVCH24T245NMUR application, or SN74AVCH24T245NMUR equivalent, key selection criteria include its 83-pin nFBGA package, per-channel DIR/OE control architecture, 4.6-V I/O tolerance, 100 mA latch-up rating, and guaranteed operation down to 1.2 V on both rails - critical for power-aware FPGA-to-ASIC, memory subsystem, and multi-voltage processor bus bridging.

Technical Context

The SN74AVCH24T245NMUR implements six independent 4-bit transceiver channels, each with dedicated DIR and OE inputs referenced to VCCA. Its dual-rail design isolates A-port logic (VCCA-referenced) from B-port logic (VCCB-referenced), enabling asynchronous bidirectional data flow without internal level-shifting circuitry.

VCC isolation ensures high-impedance outputs when either VCCA or VCCB is at GND, while I_off protection disables outputs during partial power-down to prevent back-current. Bus-hold circuitry actively maintains valid logic states on undriven A/B port inputs, eliminating external pull resistors.

Key Specifications

Pinout & Package

The SN74AVCH24T245NMUR is housed in an 83-pin nFBGA package (10.00 mm × 4.50 mm, 0.5-mm pitch) with exposed thermal pad. Pin assignments follow JEDEC MO-277, supporting automated optical inspection and fine-pitch reflow.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74AVCH16T245DGGR and TXB0304RUT, the SN74AVCH24T245NMUR uniquely delivers 24-bit width, per-channel DIR/OE control, bus-hold, and true 1.2-V operation - making it the only option for high-density, low-voltage parallel bus translation requiring deterministic direction control and power sequencing safety.

Availability

SN74AVCH24T245NMUR is available at Aetrix Electronics and suitable for processor-FPGA interconnect, multi-voltage memory subsystems, and industrial PLC backplanes requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for SN74AVCH24T245NMUR 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 delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and consumer markets.

The SN74AVCH24T245NMUR belongs to TI's AVC family of advanced voltage-translating transceivers, engineered specifically for reliable, low-latency, multi-rail communication in power-sensitive, high-density digital systems.

FAQ

What is the minimum operating voltage for SN74AVCH24T245NMUR on both VCCA and VCCB rails?

The SN74AVCH24T245NMUR operates down to 1.2 V on both VCCA and VCCB rails, as confirmed in Section 6.3 "Recommended Operating Conditions" of the official datasheet. This enables compatibility with ultra-low-power cores and memory devices, and distinguishes it from older transceivers limited to 1.65-V minimum.

Does SN74AVCH24T245NMUR support automatic direction sensing like the TXB series?

No, the SN74AVCH24T245NMUR does not support automatic direction sensing. It requires explicit DIR and OE control signals per channel, as documented in the functional description and pin table. This provides deterministic, low-latency direction control essential for synchronous parallel buses - unlike auto-sensing devices optimized for I²C or UART.

Can SN74AVCH24T245NMUR be used with VCCA = 1.2 V and VCCB = 3.3 V simultaneously?

Yes, the SN74AVCH24T245NMUR fully supports asymmetric rail operation including VCCA = 1.2 V and VCCB = 3.3 V. Its datasheet specifies this configuration explicitly in the Description section and lists 100 Mbps maximum data rate for 1.2-V translation, validated across temperature and process corners.

How many ground pins does the SN74AVCH24T245NMUR nFBGA package have?

The SN74AVCH24T245NMUR in the 83-pin nFBGA package has 16 dedicated GND pins, distributed across the perimeter and center rows (e.g., C3/C4, E3/E4, F3/F4, G4, J3/J4, K3/K4, L3, M3/M4, N3). This layout minimizes ground inductance and supports clean signal return paths for high-speed 24-bit buses.

Is bus-hold functionality enabled by default on SN74AVCH24T245NMUR, and does it require external components?

Yes, bus-hold is integrated and always active on all A/B port inputs of the SN74AVCH24T245NMUR - no configuration or external components required. As specified in Section 1 "Features", it eliminates the need for external pullup/pulldown resistors, reducing BOM cost and PCB footprint while maintaining valid logic states on undriven lines.