NXP Semiconductors 74LVT652D,118

Overview

74LVT652D,118 from NXP Semiconductors (formerly Philips) is a 3.3V octal transceiver/register with non-inverting 3-State outputs, dual independent registers for A and B buses, real-time or stored data multiplexing, and bus-hold inputs eliminating external pull-ups. It supports 5V-tolerant I/O and delivers ±64mA/–32mA output drive for high-noise industrial backplanes.

For engineers reviewing the 74LVT652D,118 datasheet, 74LVT652D,118 pinout, 74LVT652D,118 application, or 74LVT652D,118 equivalent, key selection criteria include propagation delay (2.6–2.8 ns), 3-State output enable/disable timing (≤7.3 ns), bus-hold current (±75 µA), and compatibility with mixed-voltage 3.3V/5V system interconnects.

Technical Context

The 74LVT652D,118 implements dual-directional 8-bit data flow control using two independent clock inputs (CPAB/CPBA), two select inputs (SAB/SBA), and two active-polarity output enables (OEAB high-active, OEBA low-active). Its BiCMOS architecture enables simultaneous real-time transfer and register storage without bus contention.

It features power-up 3-State and reset behavior, latch-up protection >500 mA per JEDEC Std 17, and ESD robustness >2000 V HBM. Input and output voltage tolerances (VI up to 5.5 V, VOUT up to 7.0 V) allow direct interfacing with legacy 5V logic while operating at 3.3V supply.

Key Specifications

Pinout & Package

74LVT652D,118 is housed in a 24-pin plastic Small Outline (SOL) package per SOT137-1, 7.5 mm body width, surface-mount compatible with standard reflow profiles.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar octal transceiver/register applications.

Compared with SN74LVT652DBR and 74ALVT652D,118, the 74LVT652D,118 uniquely combines bus-hold functionality, 5V-tolerant I/O, and ±64mA drive in a standard SOL package-making it optimal for cost-sensitive, high-reliability industrial backplane designs requiring zero external bias components.

Availability

74LVT652D,118 is available at Aetrix Electronics and suitable for industrial backplane interfaces, legacy system bus bridges, modular rack-mount controllers, and high-density data acquisition hubs requiring stable component supply across extended product lifecycles.

Supply support for 74LVT652D,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 is a global semiconductor leader focused on secure connectivity solutions for automotive, industrial, and IoT applications, with roots in Philips' pioneering logic IC development.

The 74LVT652D,118 belongs to NXP's LVT (Low-Voltage TTL) logic family, engineered specifically for high-speed, mixed-voltage system interconnects where 3.3V core logic must reliably interface with 5V peripherals.

FAQ

What is the maximum clock frequency supported by the 74LVT652D,118?

The 74LVT652D,118 supports a maximum clock frequency of 150 MHz at VCC = 3.3 V and ambient temperature –40°C to +85°C. This rating is validated under AC test conditions with CL = 50 pF and tR/tF = 2.5 ns. The 74LVT652D,118 achieves this performance through its BiCMOS process, enabling fast edge rates while maintaining low power consumption.

Does the 74LVT652D,118 require external pull-up resistors on unused inputs?

No, the 74LVT652D,118 does not require external pull-up resistors on unused A-side inputs because it integrates bus-hold circuitry with ±75 µA overdrive current. This feature actively maintains the last-valid logic state on floating A0–A7 pins. The 74LVT652D,118 B-side inputs do not include bus-hold and must be terminated if left unconnected.

Can the 74LVT652D,118 safely interface with 5V logic systems?

Yes, the 74LVT652D,118 supports 5V-tolerant inputs and outputs: VI and VOUT ratings extend to 5.5 V and 7.0 V respectively, and it accepts TTL-level switching thresholds (VIL = 0.8 V, VIH = 2.0 V). The 74LVT652D,118 operates from a 3.3V supply while driving and receiving signals from 5V devices without level shifters.

What is the function of the OEBA pin on the 74LVT652D,118?

The OEBA (Output Enable B-to-A) pin on the 74LVT652D,118 is an active-low control that enables 3-State output drivers for the B→A data path (B0–B7 → A0–A7). When OEBA = Low, the A-side outputs reflect either real-time or registered B-bus data depending on SBA and CPBA states. When OEBA = High, all A-side outputs enter high-impedance mode - a critical feature for bus sharing in multi-master systems.

Is the 74LVT652D,118 suitable for hot-swap applications?

Yes, the 74LVT652D,118 is explicitly designed for live insertion/extraction: it features power-up 3-State behavior, latch-up immunity >500 mA, and robust ESD protection (>2000 V HBM). These characteristics prevent bus contention and damage during module replacement in powered-backplane systems - a key requirement verified in the 74LVT652D,118 product specification.