NXP Semiconductors 74ALVCH16952DGG118

Overview

74ALVCH16952DGG118 from Nexperia is a 16-bit dual-octal registered transceiver with 3-state outputs, designed for bidirectional data flow between two parallel buses. It features two independent sections (Section 1 and Section 2), each with eight A-to-B and B-to-A registered paths, clocked on rising edges of nCPAB/nCPBA, enabled by active-low nCEAB/nCEBA and nOEAB/nOEBA, and operates across -40 °C to +85 °C for industrial bus interfacing.

For engineers reviewing the 74ALVCH16952DGG118 datasheet, 74ALVCH16952DGG118 pinout, 74ALVCH16952DGG118 application, or 74ALVCH16952DGG118 equivalent, this device supports high-speed synchronous bus bridging in memory expansion, FPGA I/O expansion, and backplane interconnects where low-noise TSSOP packaging, JEDEC JESD8-B compliance, and 3.6 V max supply tolerance are required.

Technical Context

The 74ALVCH16952DGG118 implements two independent dual-octal register stages - each section contains mirrored A→B and B→A paths with separate clock (nCPAB/nCPBA), clock enable (nCEAB/nCEBA), and output enable (nOEAB/nOEBA) controls. Data latching occurs on the LOW-to-HIGH transition of respective clocks when corresponding clock enables are LOW.

All 32 data terminals (1A0–1A7, 1B0–1B7, 2A0–2A7, 2B0–2B7) support bidirectional flow with bus-hold circuitry, while the TSSOP56 package integrates eight GND and four VCC pins to minimize ground bounce and supply noise - critical for stable operation at up to 350 MHz clock frequency under 3.6 V supply.

Key Specifications

Pinout & Package

TSSOP56 package (SOT364-1), 6.1 mm body width, 56-pin plastic thin shrink small outline with 0.5 mm pitch; features 8 GND pins (pins 4, 11, 18, 25, 32, 39, 46, 53) and 4 VCC pins (pins 7, 22, 35, 50) for low-inductance power delivery.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74ALVCH16952GR and 74LVC16952PW, the 74ALVCH16952DGG118 offers superior noise immunity via its MULTIBYTE™ pinout and tighter 2.3–3.6 V operating window optimized for 2.5 V/3.3 V mixed-signal systems, making it preferred for industrial backplanes where signal integrity outweighs thermal density needs.

Availability

74ALVCH16952DGG118 is available at Aetrix Electronics and suitable for memory expansion interfaces, FPGA I/O expansion, backplane interconnects, and industrial control bus isolation requiring stable component supply across extended temperature ranges and high-speed synchronous operation.

Supply support for 74ALVCH16952DGG118 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 delivering high-performance logic, analog, and MOSFET solutions with emphasis on efficiency, reliability, and miniaturization for industrial, computing, and communications markets.

The 74ALVCH16952DGG118 belongs to Nexperia's advanced ALVCH logic family, engineered specifically for high-speed, low-noise bidirectional bus interfacing in space-constrained industrial and telecom equipment where signal fidelity and thermal stability are critical.

FAQ

What is the maximum clock frequency supported by the 74ALVCH16952DGG118?

The 74ALVCH16952DGG118 supports a maximum clock frequency of 350 MHz under recommended operating conditions (VCC = 3.0–3.6 V, CL = 50 pF). This value is confirmed in Table 7 of the datasheet and applies to both nCPAB and nCPBA inputs. The device achieves this performance while maintaining propagation delay (tpd) as low as 1.0 ns and pulse width (tw) ≥ 3.3 ns, ensuring reliable edge-triggered operation in high-speed synchronous systems.

Does the 74ALVCH16952DGG118 include bus-hold functionality?

Yes, the 74ALVCH16952DGG118 integrates bus-hold circuitry on all 32 data I/O pins (1A0–1A7, 1B0–1B7, 2A0–2A7, 2B0–2B7). As specified in Table 6, IBHL (bus hold LOW sustaining current) is 75–150 μA at VCC = 3.0 V and VI = 0.8 V, and IBHH (bus hold HIGH sustaining current) is -75 to -175 μA at VI = 2.0 V. This eliminates the need for external pull-up or pull-down resistors on unused or floating data lines.

What are the key differences between the 74ALVCH16952DGG118 and the 74LVC16952PW?

The 74ALVCH16952DGG118 operates from 2.3 V to 3.6 V and is optimized for 2.5 V/3.3 V systems, whereas the 74LVC16952PW supports 1.65–3.6 V - enabling 1.8 V logic compatibility. Both share TSSOP56 packaging and functional equivalence, but the 74ALVCH16952DGG118 delivers tighter timing (tpd down to 1.0 ns) and higher noise immunity via MULTIBYTE™ pinout and enhanced ground/power pin distribution, making it preferable for industrial backplane use.

Can the 74ALVCH16952DGG118 be used in automotive applications?

No, the 74ALVCH16952DGG118 is not automotive-qualified. Per Nexperia's legal disclaimers (Section 14), unless explicitly stated as automotive qualified in the datasheet, the device is intended for industrial and commercial applications only. It is not tested or warranted for AEC-Q100 qualification, extended temperature ranges beyond -40 °C to +85 °C, or safety-critical automotive functions.

How many independent clock domains does the 74ALVCH16952DGG118 support?

The 74ALVCH16952DGG118 supports four independent clock domains: nCPAB and nCPBA for Section 1 (pins 2 and 55), and nCPAB and nCPBA for Section 2 (pins 27 and 30). Each clock input controls data latching in one direction (A→B or B→A) within its respective section, allowing fully asynchronous operation between sections and directions when clock enables (nCEAB/nCEBA) are asserted independently.