Texas Instruments SN74ALVTH162245DL

Overview

SN74ALVTH162245DL from Texas Instruments is a 16-bit dual-octal noninverting bus transceiver with 3-state outputs, designed for 2.5-V/3.3-V V_CC operation and mixed-mode 5-V interface compatibility. It supports bidirectional data flow (A↔B), features integrated bus-hold circuitry, 30-Ω A-port series termination, and I_off/power-up 3-state for hot insertion in industrial backplane and memory subsystem applications.

For engineers reviewing the SN74ALVTH162245DL datasheet, SN74ALVTH162245DL pinout, SN74ALVTH162245DL application, or SN74ALVTH162245DL equivalent, key selection criteria include its 32/64 mA B-port drive strength at 3.3 V, 48-pin SSOP (DL) package thermal resistance (θ_JA = 63°C/W), bus-hold current specifications (±75 µA at 3 V), and guaranteed 3.1 ns max t_PHL (A→B) under 50-pF load.

Technical Context

This device implements a flow-through architecture with distributed V_CC/GND pins to minimize high-speed switching noise, and uses Advanced BiCMOS Technology (ABT) for low static power dissipation. Its dual 8-bit sections operate independently via dedicated DIR/OE controls, enabling flexible 8-bit or 16-bit bus isolation.

The transceiver supports true mixed-signal operation: inputs tolerate 5-V logic levels while operating from 2.3–3.6-V V_CC, and outputs drive TTL loads directly. Bus-hold circuitry eliminates external pull resistors on floating data lines, and A-port outputs integrate 30-Ω series resistors to suppress overshoot/undershoot without external components.

Key Specifications

Pinout & Package

SN74ALVTH162245DL is housed in a 48-pin Shrink Small-Outline Package (SSOP), DL variant, with 0.5-mm lead pitch, 12.6 mm × 7.9 mm body size, and 1.2-mm max height per JEDEC MO-153. The package features gull-wing leads, exposed thermal pad not present, and RoHS-compliant lead finish.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC162245DGGR and SN74AVC162245GR, SN74ALVTH162245DL uniquely delivers 5-V input tolerance, integrated bus-hold, and 64-mA B-port sink capability - making it the only option among the three qualified for industrial backplane hot insertion with legacy TTL peripherals.

Availability

SN74ALVTH162245DL is available at Aetrix Electronics and suitable for industrial backplane interface, FPGA-to-ASIC bridging, and memory subsystem isolation requiring stable component supply and long-term lifecycle continuity.

Supply support for SN74ALVTH162245DL 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 logic solutions, with decades of expertise in high-reliability interface ICs for industrial and automotive markets.

The ALVTH family was engineered specifically for robust mixed-voltage bus interfacing in harsh environments - emphasizing hot-swap resilience, noise immunity, and seamless 5-V legacy integration without external components.

FAQ

What is the maximum output drive capability of the SN74ALVTH162245DL at 3.3 V?

The SN74ALVTH162245DL provides up to 64 mA low-level output current (I_OL) on its B-port pins at V_CC = 3.3 V, and up to 32 mA high-level output current (I_OH). This enables direct driving of multiple TTL loads or high-capacitance backplane traces without external buffers. The A-port delivers ±12 mA, with integrated 30-Ω series resistors to dampen reflections.

Does the SN74ALVTH162245DL support hot insertion, and how is it implemented?

Yes, the SN74ALVTH162245DL supports hot insertion via two complementary features: I_off circuitry disables outputs when V_CC = 0 V (limiting leakage to ±100 µA), and power-up 3-state forces outputs into high-impedance during power ramp-up. These ensure no damaging current flows into or out of the device when inserted into a live system - a requirement verified per JESD78 Class II latch-up testing.

Can the SN74ALVTH162245DL interface between 3.3-V and 5-V logic systems?

Yes, the SN74ALVTH162245DL accepts 5-V input signals while operating from a 2.3–3.6-V V_CC, enabling direct connection to legacy TTL peripherals. Its inputs tolerate up to 5.5 V, and outputs drive standard TTL loads. However, outputs are not 5-V tolerant in the high state - they swing to V_CC (max 3.6 V) - so external level-shifting is required if driving true 5-V inputs.

What is the purpose of the bus-hold circuitry in the SN74ALVTH162245DL?

The bus-hold circuitry in the SN74ALVTH162245DL actively maintains unused or floating data inputs at valid logic levels (VIH ≥ 2.0 V or VIL ≤ 0.8 V at 3.3 V), eliminating the need for external pullup/pulldown resistors. It sources or sinks ±75 µA to sustain logic states, preventing metastability and EMI from indeterminate inputs - especially critical in unpopulated slots or during FPGA reconfiguration.

What package type and thermal characteristics does the SN74ALVTH162245DL use?

The SN74ALVTH162245DL uses a 48-pin SSOP (DL) package with 0.5-mm pitch, measuring 12.6 mm × 7.9 mm. Its thermal resistance is θ_JA = 63°C/W, measured per JESD 51-7. This value reflects typical PCB mounting with standard copper pour; actual junction temperature rise depends on board layout, airflow, and power dissipation - which remains below 5 mA ICC at 3.3 V with outputs disabled.