NXP Semiconductors 74ALVCH162827DGG118

Overview

74ALVCH162827DGG118 from Nexperia is a 20-bit non-inverting CMOS buffer/line driver with integrated 30 Ω termination resistors, dual 10-bit 3-state control (nOE1/nOE2), bus hold inputs, and IOFF partial power-down protection. It operates from 2.3 V to 3.6 V and delivers ±12 mA output drive at 3.0 V, enabling high-speed parallel bus interfacing in industrial backplanes and memory subsystems.

For engineers reviewing the 74ALVCH162827DGG118 datasheet, 74ALVCH162827DGG118 pinout, 74ALVCH162827DGG118 application, or 74ALVCH162827DGG118 equivalent, this page provides verified pin functions, JEDEC-compliant voltage thresholds (VIH/VIL), propagation delay (1.5–4.2 ns), bus hold current specs, and TSSOP56 package mechanical data - all critical for signal integrity validation and PCB layout verification.

Technical Context

This device implements two independent 10-bit buffered paths, each controlled by dedicated active-low output enables (nOE1, nOE2). Its MULTIBYTE™ flow-through pinout minimizes trace skew across bit lanes, while low-inductance multiple VCC/GND pins suppress ground bounce during simultaneous switching.

The integrated 30 Ω series termination resistors match typical PCB trace impedances, reducing reflections without external components. Bus hold circuitry maintains valid logic states on floating inputs, eliminating need for external pull-ups/downs in hot-swap or undriven bus scenarios.

Key Specifications

Pinout & Package

TSSOP56 (SOT364-1) package: plastic thin shrink small outline, 56 leads, 6.1 mm body width, 0.5 mm pitch. Features 4× VCC and 8× GND pins for low-noise power distribution.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar buffer/line driver applications.

Compared with SN74ALVCH162827DGGR, the 74ALVCH162827DGG118 offers superior partial-power-down robustness; versus 74LVC162244ADGG, it delivers system-level simplification through integrated termination and bus hold - reducing design risk and validation effort in high-reliability industrial applications.

Availability

74ALVCH162827DGG118 is available at Aetrix Electronics and suitable for industrial backplane interfaces, memory subsystem buffering, test equipment signal conditioning, and legacy bus extension requiring stable component supply and long-term lifecycle support.

Supply support for 74ALVCH162827DGG118 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

Nexperia is a global semiconductor expert focused on high-volume, high-reliability logic, analog, and MOSFET solutions for industrial, automotive, and computing markets.

The 74ALVCH162827DGG118 belongs to Nexperia's advanced ALVCH logic family, engineered for low-noise, high-speed parallel bus applications demanding integrated termination, bus hold, and robust power-down behavior.

FAQ

What is the maximum operating frequency supported by the 74ALVCH162827DGG118?

The 74ALVCH162827DGG118 supports bus operation up to approximately 200 MHz, based on its worst-case propagation delay of 4.2 ns (VCC = 3.0–3.6 V, CL = 50 pF). This enables use in DDR2 memory interfaces and high-speed industrial backplanes where timing margins must accommodate trace delays and load variations. The 74ALVCH162827DGG118 achieves this performance while maintaining signal integrity via integrated 30 Ω termination.

Does the 74ALVCH162827DGG118 require external pull-up or pull-down resistors on its inputs?

No, the 74ALVCH162827DGG118 does not require external pull-up or pull-down resistors because it features bus hold circuitry on all 20 input pins. This internal circuit actively maintains the last-valid logic state when inputs float, preventing metastability during power-up, hot-swap events, or bus contention. The 74ALVCH162827DGG118 thus eliminates the need for 20 discrete biasing components in systems with undriven or intermittently connected buses.

How does the IOFF feature of the 74ALVCH162827DGG118 protect the device during partial power-down?

The IOFF circuitry in the 74ALVCH162827DGG118 disables all outputs and blocks current flow when VCC drops below a threshold, even if input or output pins are driven by other active devices. This prevents damaging backflow current that could occur in mixed-rail systems - for example, when a 74ALVCH162827DGG118-powered board is hot-plugged into a live backplane. The 74ALVCH162827DGG118 meets JEDEC JESD78 requirements for powered-off protection.

Can the 74ALVCH162827DGG118 be used as a single 20-bit buffer or only as two independent 10-bit buffers?

The 74ALVCH162827DGG118 supports both configurations: it can operate as one unified 20-bit buffer (by tying nOE1 and nOE2 together) or as two independent 10-bit buffers (using separate nOE1/nOE2 controls). This flexibility enables use in systems requiring either full-bus isolation or granular control - such as selectively disabling half a memory address bus during refresh. The 74ALVCH162827DGG118 pinout and functional diagram confirm this dual-mode capability.

What is the purpose of the multiple VCC and GND pins on the 74ALVCH162827DGG118 TSSOP56 package?

The 74ALVCH162827DGG118 uses four VCC and eight GND pins to minimize power distribution inductance and reduce ground bounce during high-speed switching of all 20 outputs. This layout lowers simultaneous switching noise (SSN), improves power supply rejection ratio (PSRR), and ensures stable voltage references across the die - critical for maintaining timing accuracy and signal integrity in dense PCB layouts. The 74ALVCH162827DGG118 datasheet specifies these pins are distributed to balance current paths and thermal dissipation.