onsemi 74ALVC16245MTDX

Overview

74ALVC16245MTDX from onsemi is a low-voltage 16-bit bidirectional transceiver with 3.6 V tolerant I/O, designed for bus interface applications between mixed-voltage domains. It features dual-byte 3-STATE control (OE1/OE2), independent transmit/receive direction control (T/R1/T/R2), and operates across 1.65 V to 3.6 V V_CC, supporting industrial temperature range (−40 °C to +85 °C) in TSSOP-48 package.

For engineers reviewing the 74ALVC16245MTDX datasheet, pinout, applications, or equivalent options, key selection criteria include 3.6 V I/O tolerance, sub-3.5 ns propagation delay at 3.3 V, dual-byte enable architecture, 3-STATE output leakage ≤ ±10 µA, and compatibility with live insertion/withdrawal protocols in backplane and hot-swap systems.

Technical Context

The 74ALVC16245MTDX implements two independent 8-bit bidirectional data paths (A0–A7/B0–B7 and A8–A15/B8–B15), each with dedicated OE and T/R inputs enabling granular bus control. Its advanced CMOS process delivers high-speed operation while maintaining low static current (I_CC ≤ 40 µA at V_CC = 3.6 V) and supports power-down high-impedance I/O states.

Direction control is synchronous with enable: when OE is LOW, data flows from A-to-B if T/R is LOW, or B-to-A if T/R is HIGH; both ports enter high-impedance state when OE is HIGH. Input thresholds scale with V_CC (VIH ≥ 0.65×V_CC), ensuring robust noise immunity across supply voltages.

Key Specifications

Pinout & Package

TSSOP-48 (Case 948BQ), 12.5 mm × 6.1 mm body, 0.5 mm pitch, lead-free and RoHS compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74ALVC16245DGGR and 74LVC16245APAG, the 74ALVC16245MTDX offers the fastest propagation delay (3.0 ns) at 3.3 V and is optimized for industrial hot-swap systems requiring guaranteed live-insertion behavior and JEDEC JED78 latch-up immunity.

Availability

74ALVC16245MTDX is available at Aetrix Electronics and suitable for industrial backplane interfaces, memory expansion subsystems, hot-swap PCIe carrier boards, and programmable logic I/O expansion requiring stable component supply and long-term lifecycle support.

Supply support for 74ALVC16245MTDX 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

onsemi (formerly ON Semiconductor) is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.

The ALVC logic family targets high-speed, low-voltage bus interface applications requiring robust noise immunity, live insertion capability, and mixed-voltage domain bridging - specifically engineered for industrial control and communications infrastructure.

FAQ

What is the maximum operating frequency supported by the 74ALVC16245MTDX?

The 74ALVC16245MTDX does not specify a maximum clock frequency directly, but its propagation delay (t_PD) of 3.0 ns max at V_CC = 3.3 V implies reliable operation up to approximately 300 MHz for simple bus toggling. Actual achievable frequency depends on system-level factors including trace length, load capacitance, and timing margins. For precise timing analysis, designers must use the 74ALVC16245MTDX's published AC characteristics in conjunction with their specific PCB layout and termination scheme.

Can the 74ALVC16245MTDX be used to interface a 1.8 V microcontroller with a 3.3 V peripheral?

Yes, the 74ALVC16245MTDX supports this exact use case: its 3.6 V tolerant inputs and outputs allow safe connection to 3.3 V peripherals while operating from a 1.8 V V_CC. The device maintains valid logic thresholds (VIH ≥ 0.65×V_CC) and drive strength across the full 1.65–3.6 V range. No external level-shifting components are required, making the 74ALVC16245MTDX ideal for mixed-voltage MCU peripheral expansion.

How should the OE and T/R pins be configured for unidirectional data flow from Port A to Port B?

To configure unidirectional A→B flow, assert OE1 (and/or OE2) LOW to enable the desired byte(s), then set T/R1 (and/or T/R2) LOW. This establishes A-to-B directionality per enabled byte group. When OE is HIGH, both ports enter high-impedance state regardless of T/R state. For full 16-bit operation, tie OE1/OE2 and T/R1/T/R2 together respectively. The 74ALVC16245MTDX's truth table explicitly defines these states in its datasheet.

Is the 74ALVC16245MTDX suitable for hot-plug applications?

Yes, the 74ALVC16245MTDX is explicitly designed for live insertion/withdrawal. Its power-down high-impedance inputs and outputs, combined with guaranteed high-Z behavior during power transitions (when OE is pulled up), prevent bus contention. The datasheet recommends tying OE to V_CC via a pull-up resistor to ensure safe startup. This makes the 74ALVC16245MTDX appropriate for hot-swap backplanes and modular computing systems.

What is the thermal performance of the 74ALVC16245MTDX in TSSOP-48 package?

The 74ALVC16245MTDX in TSSOP-48 (Case 948BQ) has a junction-to-ambient thermal resistance (θ_JA) of 110 °C/W under standard JEDEC conditions. At maximum recommended operating temperature (+85 °C ambient) and worst-case static power dissipation (I_CC = 40 µA at 3.6 V), junction temperature remains well below 100 °C. For high-density layouts, use multiple V_CC/GND pins and thermal vias to maintain reliability - the 74ALVC16245MTDX's thermal design supports continuous industrial operation.