NXP Semiconductors 74LVT2952PW,112

Overview

74LVT2952PW,112 from NXP Semiconductors is a 3.3 V octal registered transceiver with independent A/B bus registers, 3-state outputs, ±64 mA/−32 mA drive capability, and bus-hold inputs. It operates across −40 °C to +85 °C in a TSSOP24 package and is used in bidirectional data buffering between 3.3 V logic domains and 5 V legacy buses.

For engineers reviewing the 74LVT2952PW,112 datasheet, 74LVT2952PW,112 pinout, 74LVT2952PW,112 application, or 74LVT2952PW,112 equivalent, key selection criteria include clocked register synchronization, dual-directional 3-state control (OEAB/OEBA), 3.3 V supply compatibility with 5 V-tolerant I/O, and bus-hold functionality eliminating external pull-ups.

Technical Context

The 74LVT2952PW,112 implements two independent 8-bit edge-triggered D-type registers-one for A→B and one for B→A data flow-each controlled by dedicated clock (CPAB/CPBA) and clock enable (CEAB/CEBA) inputs. Its BiCMOS architecture enables TTL-compatible switching levels while maintaining low static power at 3.3 V.

Each register loads data on the rising edge of its respective clock when its clock enable is LOW; outputs are enabled only when the corresponding output enable (OEAB or OEBA) is LOW. The device supports live insertion/extraction and features power-up 3-state and reset behavior to prevent bus contention during power sequencing.

Key Specifications

Pinout & Package

TSSOP24 package (SOT355-1): plastic thin shrink small outline, 24 leads, 4.4 mm body width, 0.65 mm pitch, lead-free and RoHS compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVT8984PWR and 74ALVCH162244DLR, the 74LVT2952PW,112 uniquely provides independent dual-clock register control and 5 V-tolerant I/O in a compact TSSOP24, making it optimal for deterministic bidirectional buffering in mixed-voltage industrial systems.

Availability

74LVT2952PW,112 is available at Aetrix Electronics and suitable for industrial backplane interfaces, memory expansion modules, telecom line cards, and automated test equipment requiring stable component supply and long-term lifecycle support.

Supply support for 74LVT2952PW,112 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 company specializing in secure connectivity solutions for automotive, industrial, and IoT applications, with leadership in high-performance logic and interface ICs.

The 74LVT2952PW,112 belongs to NXP's LVT (Low-Voltage TTL) logic family, designed specifically for high-speed, low-power bidirectional data transfer between mixed-voltage systems in industrial and communications infrastructure.

FAQ

What is the maximum clock frequency supported by the 74LVT2952PW,112?

The 74LVT2952PW,112 supports a maximum clock frequency of 200 MHz at VCC = 3.3 V ± 0.3 V under recommended operating conditions. This is derived from its minimum pulse width (tW) of 3.3 ns and verified dynamic characterization in Table 8 of the NXP datasheet Rev. 4. System-level timing must account for setup/hold times and propagation delays to maintain reliable register loading.

Does the 74LVT2952PW,112 support live insertion and hot-swap operations?

Yes, the 74LVT2952PW,112 explicitly supports live insertion and extraction as stated in Section 2 ("Features and benefits"). Its power-up 3-state behavior, bus-hold inputs, and latch-up protection (>500 mA per JESD78 Class II Level A) ensure safe operation during hot-plug events in modular backplane systems without damaging the device or corrupting bus states.

Can the 74LVT2952PW,112 interface directly with 5 V logic without external level shifters?

Yes, the 74LVT2952PW,112 accepts input voltages up to 5.5 V and drives outputs compatible with 5 V TTL thresholds while operating from a 3.3 V supply. Its 5 V-tolerant I/O eliminates the need for external level shifters when connecting to legacy 5 V buses, as confirmed in Table 6 (Recommended Operating Conditions) and Section 2 of the NXP datasheet.

How does the bus-hold feature work on the 74LVT2952PW,112?

The 74LVT2952PW,112 integrates bus-hold circuitry on all data I/O pins (A0–A7, B0–B7), drawing ±75 µA to ±150 µA to retain the last-valid logic state when inputs float. This eliminates external pull-up/pull-down resistors, reduces PCB complexity, and improves reliability in systems with unused or intermittently connected lines, as specified in Table 7 (Static Characteristics).

What are the thermal limitations for continuous operation of the 74LVT2952PW,112?

The 74LVT2952PW,112 has a maximum junction temperature of +150 °C and a total power dissipation limit of 500 mW at ambient temperatures from −40 °C to +85 °C. For TSSOP24 (SOT355-1), derating begins above +60 °C at 5.5 mW/K, requiring thermal design consideration in high-density or high-ambient environments per Table 5 (Limiting Values).