Texas Instruments SN74GTLPH306DGVR

Overview

SN74GTLPH306DGVR from Texas Instruments is an 8-bit bidirectional LVTTL-to-GTLP bus transceiver in a 24-pin TVSOP package, supporting hot insertion via Ioff and power-up 3-state, with medium-drive GTLP outputs (50 mA), 5-V-tolerant LVTTL inputs, and TI-OPC/OEC circuitry for backplane signal integrity. It enables high-speed communication between LVTTL logic cards and GTLP backplanes in telecom switching systems.

For engineers reviewing the SN74GTLPH306DGVR datasheet, SN74GTLPH306DGVR pinout, SN74GTLPH306DGVR application, or SN74GTLPH306DGVR equivalent, key selection considerations include GTLP/LVTTL level translation capability, distributed-load backplane timing (tPLH = 3.6 ns A→B), bus-hold on A-port inputs, VREF-referenced differential B-port interface, and TVSOP-24 thermal performance (θJA = 86°C/W).

Technical Context

The SN74GTLPH306DGVR implements asynchronous bidirectional data flow controlled by DIR and OE pins, with noninverting polarity and true transparent operation: when OE is low and DIR is high, A-port data drives B outputs; when OE is low and DIR is low, B-port data drives A outputs. The device supports both GTL (VTT = 1.2 V, VREF = 0.8 V) and GTLP (VTT = 1.5 V, VREF = 1 V) signaling standards.

TI-OPC circuitry actively limits overshoot during low-to-high transitions on unevenly loaded backplanes, while OEC circuitry enhances signal integrity and reduces EMI. Bus-hold on all eight A-port inputs eliminates need for external pull resistors, and Ioff protection prevents current backflow during hot insertion when VCC = 0 V.

Key Specifications

Pinout & Package

SN74GTLPH306DGVR uses a 24-pin Thin Very Small Outline Package (TVSOP-DGV) with 0.4 mm lead pitch, 6.6 mm × 4.4 mm body, and 1.2 mm max height per JEDEC MO-153. Pin 1 index area located at top-left corner (quadrant Q1 in tape).

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74GTLPH306DGVR, the 16-bit SN74GTLPH16306DGVR increases channel density but demands more board area and power, while the SOIC-packaged SN74GTLPH306DW trades compactness for superior thermal performance and assembly compatibility - selection depends on layout constraints, thermal budget, and manufacturing process.

Availability

SN74GTLPH306DGVR is available at Aetrix Electronics and suitable for telecom line cards, industrial backplane systems, and high-speed test equipment requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for SN74GTLPH306DGVR 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 logic solutions, with over 50 years of innovation in high-speed interface ICs and industrial-grade reliability.

The SN74GTLPH306DGVR belongs to TI's GTLP logic family, designed specifically for high-integrity, hot-pluggable communication between LVTTL logic subsystems and GTLP backplanes in telecom infrastructure and modular instrumentation.

FAQ

What is the maximum recommended operating temperature for SN74GTLPH306DGVR?

The SN74GTLPH306DGVR is rated for continuous operation from –40°C to +85°C ambient temperature. This industrial-grade range is validated across all electrical specifications including propagation delay, drive strength, and bus-hold performance. Thermal derating is not required within this range when mounted per TI's recommended land pattern for the DGV package.

Does SN74GTLPH306DGVR support GTL signaling in addition to GTLP?

Yes, SN74GTLPH306DGVR supports both GTL (VTT = 1.2 V, VREF = 0.8 V) and GTLP (VTT = 1.5 V, VREF = 1 V) signaling standards. The device's AC specifications are published for GTLP, but DC parameters remain valid for GTL operation. Users must adjust VTT and VREF accordingly and verify noise margins meet system requirements.

How does the bus-hold feature function on the A-port inputs of SN74GTLPH306DGVR?

The bus-hold circuit on each A-port input of SN74GTLPH306DGVR actively maintains the last-valid logic state when the input is floating or undriven, sinking or sourcing ±75 µA to hold VI at ≤0.8 V (low) or ≥2 V (high). This eliminates need for external pull-up/pull-down resistors and prevents metastability during hot-swap events.

What is the purpose of the VREF pin on SN74GTLPH306DGVR?

The VREF pin on SN74GTLPH306DGVR sets the differential input threshold voltage for the B-port GTLP receivers. For GTLP operation, VREF must be set to 1 V (±0.13 V); for GTL, it is 0.8 V (±0.06 V). VREF must be stable and low-noise, as deviations directly impact B-port noise margin and switching thresholds.

Can SN74GTLPH306DGVR be used in hot-insertion applications without additional protection circuitry?

Yes, SN74GTLPH306DGVR is fully specified for hot insertion using built-in Ioff and power-up 3-state circuitry. When VCC = 0 V, Ioff limits input/output leakage to <10 µA; during power ramp (0–1.5 V), outputs remain in high-impedance state. No external protection diodes or sequencing controllers are required for compliant hot-swap deployment.