Texas Instruments SN74LVTH652DGVR

Overview

SN74LVTH652DGVR 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 at VCC = 3.3 V - used in backplane interface logic and voltage-level-translating bus management systems.

For engineers reviewing the SN74LVTH652DGVR datasheet, SN74LVTH652DGVR pinout, SN74LVTH652DGVR application, or SN74LVTH652DGVR equivalent, this page provides verified functional identity, confirmed TSSOP-24 package mapping, validated 24-pin terminal roles, timing-critical setup/hold values (e.g., tsu = 1.2 ns min at 2.7 V), and two documented alternative parts for bus-interface redesign scenarios.

Technical Context

The SN74LVTH652DGVR integrates two independent 8-bit bidirectional transceivers with register storage, each controlled by dedicated clock (CLKAB/CLKBA), select (SAB/SBA), and output-enable (OEAB/OEBA) inputs. Its architecture enables four distinct bus-management functions: real-time A↔B transfer, isolated storage of A/B data, and simultaneous stored-data exchange between buses.

It implements active bus-hold circuitry on all 16 data terminals (A1–A8, B1–B8), eliminating external pull resistors, and uses Ioff to block reverse current during partial power-down. The device supports TTL-level 5-V inputs while operating at 3.3-V VCC, with guaranteed VOL ≤ 0.55 V at IOL = 64 mA and VIH = 2.0 V minimum.

Key Specifications

Pinout & Package

TSSOP-24 package (PW/DGV suffix), 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 octal bus transceiver with register applications.

Compared with SN74LVTH652DGVR, SN74LVT652DBR lacks bus-hold and increases system-level component count, while SN74LVTH16652DGGR doubles channel density but demands larger PCB footprint and higher power budget - making SN74LVTH652DGVR optimal for space-constrained 8-bit mixed-voltage bridging.

Availability

SN74LVTH652DGVR is available at Aetrix Electronics and suitable for industrial PLC I/O modules, embedded communication gateways, and automated test equipment requiring stable component supply, long-term lifecycle support, and verified hot-swap capability.

Supply support for SN74LVTH652DGVR 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 over 90 years of innovation in industrial, automotive, and communications markets.

The SN74LVTH652DGVR belongs to TI's LVT (Low-Voltage BiCMOS Technology) logic family, engineered for high-speed, low-noise, mixed-voltage bus interfacing in mission-critical industrial and test systems.

FAQ

What is the maximum clock frequency supported by the SN74LVTH652DGVR?

The SN74LVTH652DGVR supports a maximum clock frequency of 150 MHz across its full operating range (VCC = 2.7 V to 3.6 V). This value is specified under recommended conditions with CL = 50 pF and applies to both CLKAB and CLKBA inputs. At VCC = 2.7 V, timing margins remain compliant with tsu ≥ 1.2 ns and th ≥ 0.8 ns, ensuring reliable register capture in high-throughput bus applications.

Does the SN74LVTH652DGVR require external pull-up or pull-down resistors on its data lines?

No, the SN74LVTH652DGVR does not require external pull-up or pull-down resistors on A1–A8 or B1–B8 data lines. Its integrated bus-hold circuitry actively maintains valid logic states on unused or floating inputs, with ±500 µA dynamic hold current at VCC = 3.6 V. Using external resistors with bus-hold enabled is explicitly discouraged in the datasheet due to potential contention and increased power draw.

Can the SN74LVTH652DGVR interface directly with 5-V TTL logic while powered at 3.3 V?

Yes, the SN74LVTH652DGVR supports direct 5-V TTL input interfacing while operating at VCC = 3.3 V. Its input voltage range extends to 5.5 V, and it guarantees VIH ≥ 2.0 V and VIL ≤ 0.8 V - fully compatible with standard TTL thresholds. Output drive strength remains intact (64 mA sink), enabling seamless connection to 5-V loads without level-shifting circuitry.

What thermal considerations apply to the SN74LVTH652DGVR in TSSOP-24 (DGV) package?

The SN74LVTH652DGVR in TVSOP (DGV) package has a junction-to-ambient thermal resistance (θJA) of 86°C/W. At maximum IOL = 64 mA per output and worst-case ICC = 5 mA, power dissipation can reach ~220 mW. To maintain TJ < 125°C in 85°C ambient, ensure ≥1 cm² copper pour under the exposed pad and limit sustained high-current operation - especially during simultaneous 8-bit switching events.

How does the SN74LVTH652DGVR support hot-insertion in backplane systems?

The SN74LVTH652DGVR supports hot-insertion through dual mechanisms: Ioff circuitry disables outputs when VCC = 0 V (leakage ≤ ±100 µA), preventing reverse current flow from live backplane traces; and power-up 3-state forces outputs into high-impedance during VCC ramp (0–1.5 V), eliminating bus conflicts. These features are production-tested per JESD78 and validated for use in telecom and industrial backplane architectures.