NXP Semiconductors 74ALVT16240DGG,118

Overview

74ALVT16240DGG,118 from NXP Semiconductors (formerly Philips) is a 16-bit inverting 3-state buffer/driver designed for bus interface applications at 2.5 V or 3.3 V VCC with 5 V I/O tolerance. It features four independent output-enable inputs (1OE–4OE), each controlling four outputs, and delivers ±64 mA/−32 mA drive capability. Used in high-speed digital backplanes and memory address/data buses.

For engineers reviewing the 74ALVT16240DGG,118 datasheet, 74ALVT16240DGG,118 pinout, 74ALVT16240DGG,118 application, or 74ALVT16240DGG,118 equivalent, this device supports live insertion, includes bus-hold on all data inputs to eliminate external pull-ups, and provides sub-3 ns propagation delay at 3.3 V - critical for timing-critical 16-bit parallel interfaces.

Technical Context

The 74ALVT16240DGG,118 implements a BiCMOS architecture enabling dual-supply operation (2.5 V/3.3 V core) while maintaining TTL-compatible input thresholds and 5 V-tolerant I/Os. Its four-group 3-state control enables selective bus segment isolation without full device disable.

Each of the four 4-bit sections operates independently: inputs pass through an inverting logic stage before driving push-pull outputs capable of sinking 64 mA or sourcing 32 mA. Power-up 3-state and latch-up protection (>500 mA per JESD78) ensure robust system-level reliability during hot-swap and power sequencing.

Key Specifications

Pinout & Package

TSSOP48 package (SOT362-1): plastic thin shrink small outline, 48-pin, 6.1 mm body width, 0.5 mm pitch, lead-free compatible.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-bit inverting buffer applications.

Compared with SN74ALVTH16240GR and 74LVT16240DGG,118, the 74ALVT16240DGG,118 delivers optimal balance of speed (3.0 ns max tPLH), low ICC (60 µA), and proven industrial temperature stability (−40 °C to +85 °C), making it preferred for timing-critical embedded bus interfaces.

Availability

74ALVT16240DGG,118 is available at Aetrix Electronics and suitable for memory subsystems, industrial backplanes, test equipment I/O modules, and legacy bus interface designs requiring stable component supply and long-term obsolescence management.

Supply support for 74ALVT16240DGG,118 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

NXP Semiconductors, formerly Philips Semiconductors, is a global leader in high-performance logic and interface ICs, with deep expertise in advanced BiCMOS processes and industrial-grade reliability validation.

The 74ALVT16240DGG,118 belongs to NXP's ALVT (Advanced Low-Voltage Technology) logic family, engineered specifically for high-speed, low-power 16-bit bus buffering in mixed-voltage embedded systems operating from 2.5 V or 3.3 V rails.

FAQ

What is the maximum clock frequency supported by the 74ALVT16240DGG,118 in a 16-bit bus application?

The 74ALVT16240DGG,118 does not operate on a clock; it is an asynchronous buffer. Its usable frequency depends on propagation delay and load. With 3.0 ns max tPLH/tPHL at 3.3 V and 50 pF load, it supports clean toggling up to ~160 MHz in point-to-point configurations. For heavily loaded or stubbed buses, derate based on measured rise/fall times and signal integrity analysis using the 74ALVT16240DGG,118's specified ∆t/∆V (10 ns/V) and output drive specs.

Does the 74ALVT16240DGG,118 require external pull-up resistors on its data inputs?

No. The 74ALVT16240DGG,118 includes integrated bus-hold circuitry on all data inputs (1A0–4A3), providing ±75 µA to ±140 µA holding current at 3 V. This actively maintains the last-valid logic state on floating inputs, eliminating the need for external pull-up or pull-down resistors and reducing BOM count and PCB space - a key design advantage confirmed in the 74ALVT16240DGG,118 datasheet Section 2 and Table 7.

Can the 74ALVT16240DGG,118 safely interface a 2.5 V FPGA to a 5 V peripheral without level shifters?

Yes. The 74ALVT16240DGG,118 supports 5 V-tolerant I/Os with VI and VO ratings up to 5.5 V, while operating from a 2.5 V or 3.3 V VCC supply. Inputs recognize TTL thresholds (VIH = 1.7 V min at 2.5 V), and outputs drive to valid HIGH/LOW levels into 5 V systems. This capability is explicitly verified in the 74ALVT16240DGG,118's Recommended Operating Conditions (Table 6) and Limiting Values (Table 5).

What is the thermal resistance (θJA) of the 74ALVT16240DGG,118 in its TSSOP48 package?

The 74ALVT16240DGG,118 datasheet does not specify θJA for the SOT362-1 (TSSOP48) package. Thermal performance depends on PCB layout - including copper area, via count, and airflow. For reliable operation at full drive (64 mA per output), design with ≥2 cm² of 2-oz copper connected to GND/VCC pins and verify junction temperature using the 74ALVT16240DGG,118's max Tj = +150 °C and power dissipation derived from ICC and IOL/IOH values in Tables 7 and 8.

Is the 74ALVT16240DGG,118 pin-compatible with the 74ALVT16244 or other ALVT buffer variants?

No. The 74ALVT16240DGG,118 is an inverting buffer (A→Y = NOT A), while the 74ALVT16244 is non-inverting. Their pinouts differ significantly: 74ALVT16240DGG,118 has four OE inputs (1OE–4OE) and interleaved A/Y assignments per group, whereas 74ALVT16244 uses two OEs controlling eight outputs each. Substituting either into a design built for the other will cause functional failure - always verify logic polarity and pin mapping against the 74ALVT16240DGG,118 datasheet Figure 3 and Table 3.