Texas Instruments SN74LVTH2952PW

Overview

SN74LVTH2952PW from Texas Instruments is an octal bus transceiver and register IC designed for bidirectional 3.3-V VCC operation with 5-V tolerant inputs/outputs, supporting mixed-mode signal interfacing between 3.3-V logic and legacy 5-V systems. It features dual 8-bit back-to-back registers, bus-hold on all data inputs, Ioff and power-up 3-state for hot insertion, and operates down to 2.7 V supply voltage.

For engineers reviewing the SN74LVTH2952PW datasheet, SN74LVTH2952PW pinout, SN74LVTH2952PW application, or SN74LVTH2952PW equivalent, key selection criteria include its 24-pin TSSOP package, 150-MHz maximum clock frequency, ±100 µA Ioff specification at VCC = 0 V, bus-hold current of ±500 µA (VCC = 3.6 V), and guaranteed 2.7–3.6 V operating range with TTL-compatible input thresholds.

Technical Context

The SN74LVTH2952PW implements two independent 8-bit register paths (A↔B) with separate clock (CLKAB/CLKBA), clock-enable (CLKENAB/CLKENBA), and output-enable (OEAB/OEBA) controls. Data latching occurs on the low-to-high transition of CLKAB or CLKBA when the corresponding CLKEN is low, enabling synchronous bidirectional data flow control in high-speed digital buses.

Its mixed-signal interface capability stems from 5-V-tolerant inputs (VI up to 7 V) and outputs (VO up to 7 V in high-Z), combined with 3.3-V core logic and support for unregulated battery operation. The device integrates active bus-hold circuitry eliminating external pull resistors and meets JESD 17 latch-up (>500 mA) and JESD 22 ESD standards (2000-V HBM, 200-V MM).

Key Specifications

Pinout & Package

TSSOP-24 package (PW), 7.8 mm × 4.4 mm × 1.2 mm max height, 0.65 mm lead pitch, RoHS-compliant NiPdAu finish, MSL Level-1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC245APW and SN74LVCH16245ADGGR, the SN74LVTH2952PW uniquely combines synchronous dual-register architecture, 5-V-tolerant I/O, integrated bus-hold, and hot-insertion support - making it irreplaceable in applications requiring registered bidirectional data flow across mixed-voltage domains.

Availability

SN74LVTH2952PW is available at Aetrix Electronics and suitable for industrial backplane interfaces, automotive diagnostic gateways, legacy system bus bridges, and programmable logic interconnects requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for SN74LVTH2952PW 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

Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and connectivity technologies, with decades of experience in high-reliability logic and interface solutions.

The SN74LVTH2952PW belongs to TI's LVTH logic family, engineered specifically for mixed-voltage system interfacing where 3.3-V logic must coexist with legacy 5-V infrastructure - emphasizing robustness, hot-swap readiness, and minimal external component count.

FAQ

What is the maximum clock frequency supported by the SN74LVTH2952PW?

The SN74LVTH2952PW supports a maximum clock frequency of 150 MHz across its recommended operating range (VCC = 2.7 V to 3.6 V, TA = −40°C to 85°C). This rating is validated under CL = 50 pF load conditions and applies to both CLKAB and CLKBA inputs, enabling high-speed synchronous data transfer between A and B ports in the SN74LVTH2952PW.

Does the SN74LVTH2952PW require external pullup or pulldown resistors on its A/B data lines?

No, the SN74LVTH2952PW includes active bus-hold circuitry on all A and B data inputs, which maintains valid logic levels on floating or unused lines without external resistors. Using pullup or pulldown resistors with the SN74LVTH2952PW is explicitly discouraged in the datasheet, as it may interfere with bus-hold operation and increase power consumption.

Can the SN74LVTH2952PW be used in hot-insertion applications?

Yes, the SN74LVTH2952PW is fully specified for hot-insertion use via integrated Ioff and power-up 3-state circuitry. When VCC = 0 V, Ioff limits current to ±100 µA, preventing backflow; during power-up/down, outputs remain in high-impedance state until VCC exceeds 1.5 V - ensuring safe insertion into live backplanes without disrupting SN74LVTH2952PW operation.

What is the input voltage tolerance of the SN74LVTH2952PW?

The SN74LVTH2952PW accepts input voltages from −0.5 V to 7 V on all A/B data and control pins (OEAB, CLKAB, CLKENAB, OEBA, CLKBA, CLKENBA), regardless of VCC level. This 5-V-tolerant input capability allows direct connection to 5-V systems while operating from a 3.3-V supply - a defining feature of the SN74LVTH2952PW that eliminates external level-shifting components.

What package type and dimensions does the SN74LVTH2952PW use?

The SN74LVTH2952PW uses a 24-pin TSSOP (Thin Shrink Small Outline Package) with JEDEC MO-153 compliance, measuring 7.8 mm × 4.4 mm × 1.2 mm max height and 0.65 mm lead pitch. Its footprint matches standard TSSOP-24 land patterns, and it features NiPdAu lead finish with MSL Level-1 rating - confirming the physical identity and assembly compatibility of the SN74LVTH2952PW.