Texas Instruments SN74AVC24T245NMUR

Overview

SN74AVC24T245 from Texas Instruments is a 24-bit dual-supply bus transceiver enabling bidirectional voltage translation between 1.2-V to 3.6-V domains, with independent A-port (VCCA-referenced) and B-port (VCCB-referenced) operation, 3-state outputs, and Ioff partial-power-down support - used in mixed-voltage SoC interconnects, FPGA-to-ASIC data buses, and low-power embedded memory interfaces.

For engineers reviewing the SN74AVC24T245 datasheet, SN74AVC24T245 pinout, SN74AVC24T245 application, or SN74AVC24T245 equivalent, key selection criteria include configurable dual-rail supply range (1.2–3.6 V per port), 380 Mbps max data rate (1.8-V→3.3-V), VCC isolation behavior, overvoltage-tolerant I/Os (4.6 V), and nFBGA-83 package compatibility with high-density PCB layouts.

Technical Context

The SN74AVC24T245 implements asynchronous bidirectional translation via six independent 4-bit channels, each with dedicated DIR and OE control inputs referenced to VCCA. Direction control is static: DIR high enables A→B transmission; DIR low enables B→A transmission.

Its dual-rail architecture isolates logic thresholds per port - VIH/VIL for DIR/OE are referenced solely to VCCA, while I/O voltage tolerances (±0.5 V beyond VCC, up to 4.6 V) and Ioff protection (±5 µA at 0 V supply) ensure robustness during power sequencing and mixed-voltage hot-swap scenarios.

Key Specifications

Pinout & Package

nFBGA-83 package, 10.00 mm × 4.50 mm body size, 0.5-mm ball pitch, bottom-side thermal pad not electrically connected.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74AVC24T245, SN74AVCH16T245DGGR offers smaller footprint but sacrifices 8-bit width and VCC isolation; TXB0304RUT reduces control complexity via auto-direction but caps bandwidth at 100 Mbps and lacks Ioff - making SN74AVC24T245 optimal for high-channel-count, high-speed, mixed-rail industrial and computing interconnects.

Availability

SN74AVC24T245 is available at Aetrix Electronics and suitable for mobile processor interconnects, industrial PLC backplanes, enterprise SSD controllers, and automotive ADAS camera links requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for SN74AVC24T245 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 company headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, personal electronics, and enterprise applications.

The SN74AVC24T245 belongs to TI's AVC (Advanced Very-low-voltage CMOS) logic family, designed specifically for high-speed, low-voltage bidirectional translation in multi-rail digital systems where power sequencing, voltage domain isolation, and signal integrity are critical.

FAQ

What is the maximum allowable voltage on SN74AVC24T245 I/O pins when VCCA = 1.2 V and VCCB = 0 V?

The SN74AVC24T245 I/O pins tolerate up to 4.6 V regardless of supply conditions. When VCCB = 0 V, the B-port I/Os remain overvoltage-tolerant per JESD78 Class II latch-up specs, and Ioff limits reverse current to ±5 µA - ensuring safe operation during B-port power-down while A-port remains active. This behavior is confirmed in Section 6.1 Absolute Maximum Ratings and Section 8.1 Overview of the datasheet.

How does SN74AVC24T245 handle power sequencing when VCCA ramps before VCCB?

SN74AVC24T245 uses VCC isolation: if either VCCA or VCCB is at GND, all outputs go high-impedance. During VCCA-first ramp-up, B-port outputs remain in high-Z until VCCB reaches valid operating range (≥1.2 V), preventing bus contention. This is explicitly guaranteed in Feature #2 and Section 8.1 Overview, and verified in Figure 8-1 functional timing diagrams.

Can SN74AVC24T245 translate between 1.2-V and 3.3-V domains at 200 Mbps reliably?

Yes. The datasheet specifies 200 Mbps for "<1.8-V to 3.3-V Translation" and "Translate to 2.5 V or 1.8 V" - confirming 1.2-V ↔ 3.3-V operation at 200 Mbps. Measured tPLH/tPHL values (e.g., 3.2 ns at VCCA=3.3 V, VCCB=1.2 V) support this rate with >1 ns timing margin at 5 ns period, validated in Table 6-10 Switching Characteristics.

Is SN74AVC24T245 pin-compatible with SN74AVC16T245?

No. SN74AVC24T245 uses an 83-ball nFBGA package with six DIR/OE pairs and 24 bidirectional I/Os arranged in a 10×5 grid plus corner balls. SN74AVC16T245 is a 48-pin TSSOP or 48-ball VFBGA with four DIR/OE pairs and 16 I/Os. Pin count, package type, ball/pad layout, and channel grouping differ fundamentally - no mechanical or electrical pin compatibility exists.

Does SN74AVC24T245 require external pull-up resistors on OE pins?

Yes, for reliable high-impedance state during power-up. The datasheet recommends tying OE to VCCA through a pull-up resistor to ensure outputs remain disabled until VCCA is stable. Minimum resistor value depends on driver sink strength; typical values range from 4.7 kΩ to 10 kΩ - specified in Section 3 Description under "To ensure the high-impedance state during power up or power down…"