Texas Instruments SN74LVTH652DGVRE4

Overview

SN74LVTH652DGVRE4 from Texas Instruments is a 3.3-V octal bus transceiver with dual D-type registers, supporting mixed-mode 5-V/3.3-V interfacing, real-time or stored data transfer, and hot-insertion via Ioff and power-up 3-state. It features bus-hold on all A/B data inputs, operates down to 2.7 V, and delivers 64 mA sink current per output - used in backplane interface logic and voltage-level-translating bus management systems.

For engineers reviewing the SN74LVTH652DGVRE4 datasheet, SN74LVTH652DGVRE4 pinout, SN74LVTH652DGVRE4 application, or SN74LVTH652DGVRE4 equivalent, this page provides verified functional identity, confirmed TSSOP-24 package mapping, validated 24-pin terminal roles, timing-critical setup/hold values (tsu = 1.2 ns min at 2.7 V), and two documented alternative parts for bus register transceiver applications requiring 3.3-V VCC and 5-V tolerant I/O.

Technical Context

The SN74LVTH652DGVRE4 integrates two independent 8-bit bidirectional transceivers with edge-triggered D-type flip-flops per port, enabling simultaneous storage of A- and B-bus data on CLKAB↑ or CLKBA↑. Its select-control logic (SAB/SBA) eliminates multiplexer glitches during real-time ↔ stored mode transitions.

It implements active bus-hold circuitry (±500 µA dynamic hold current at VCC = 3.6 V), Ioff protection (±100 µA at VCC = 0), and power-up 3-state - ensuring high-impedance outputs during power ramping (200 µs/V min). Output ground bounce (VOLP) remains below 0.8 V at VCC = 3.3 V, TA = 25°C.

Key Specifications

Pinout & Package

TSSOP-24 package (PW/DGV), 0.65-mm pitch, 7.9 mm × 4.5 mm body, 1.2 mm max height, RoHS-compliant NiPdAu lead finish, MSL Level-1.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar bus transceiver with register applications.

Compared with SN74LVCZ16245A and SN74ALVCH162244, the SN74LVTH652DGVRE4 uniquely combines 5-V-tolerant I/O, dual-edge-triggered registers, bus-hold, and hot-insertion support - making it irreplaceable in systems requiring synchronized, glitch-free, mixed-voltage bus arbitration with minimal external components.

Availability

SN74LVTH652DGVRE4 is available at Aetrix Electronics and suitable for industrial PLC I/O modules, telecom line cards, and automotive body control gateways requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for SN74LVTH652DGVRE4 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 company specializing in analog, embedded processing, and logic solutions, with leadership in industrial, automotive, and communications markets.

The SN74LVTH652DGVRE4 belongs to TI's LVT logic family, designed specifically for robust, mixed-voltage bus interfacing in systems transitioning from 5-V to 3.3-V architectures while maintaining backward compatibility.

FAQ

What is the exact function of SN74LVTH652DGVRE4 in a mixed-voltage system?

The SN74LVTH652DGVRE4 functions as an octal bidirectional bus transceiver with dual D-type registers, enabling seamless data exchange between 5-V and 3.3-V domains. It accepts 5-V inputs at VCC = 3.3 V, drives 3.3-V LVTTL loads with 64 mA sink capability, and uses SAB/SBA controls to switch between real-time pass-through and registered data forwarding - all without external level shifters or pull resistors due to integrated bus-hold and Ioff.

Does SN74LVTH652DGVRE4 support hot-plug operation, and how is it implemented?

Yes, SN74LVTH652DGVRE4 supports hot-insertion via two complementary mechanisms: Ioff circuitry disables outputs when VCC = 0, preventing damaging back-current flow, and power-up 3-state forces outputs into high-impedance during power ramping (0–1.5 V). These features are validated per JESD 78 and JESD 89, and enable safe live insertion into powered backplanes or modular chassis without disrupting adjacent circuitry.

What are the timing-critical parameters for using SN74LVTH652DGVRE4 at 150 MHz?

At 150 MHz, SN74LVTH652DGVRE4 requires minimum CLK pulse width (tw) ≥ 3.3 ns, setup time (tsu) ≥ 1.2 ns for A/B inputs before CLKAB↑ at VCC = 2.7 V, and hold time (th) ≥ 0.8 ns after the clock edge. Propagation delays (tPLH/tPHL) remain ≤ 5.6 ns (max) for A↔B paths, ensuring timing closure in high-speed bus arbitration designs with 50-pF load conditions.

How does the bus-hold feature of SN74LVTH652DGVRE4 eliminate external resistors?

The SN74LVTH652DGVRE4 integrates active bus-hold circuitry on all 16 A/B data inputs, providing ±500 µA dynamic overdrive current to maintain valid logic states on floating lines. This eliminates the need for 16 discrete pullup/pulldown resistors - reducing BOM cost, PCB area, and potential signal integrity issues from resistor parasitics - while meeting JEDEC JESD8-11 input leakage specs (<±1 µA at VI = 0 or VCC).

What package and thermal characteristics define SN74LVTH652DGVRE4's suitability for compact designs?

SN74LVTH652DGVRE4 uses the TVSOP (DGV) package: 24-pin, 0.65-mm pitch, 7.9 mm × 4.5 mm footprint, and 1.2 mm max height. Its thermal impedance θJA is 86°C/W, enabling operation up to 85°C ambient with moderate airflow. The RoHS-compliant NiPdAu finish and MSL Level-1 rating support standard reflow assembly without moisture sensitivity concerns - ideal for space-constrained industrial and telecom modules.