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Texas Instruments 74GTLPH306DGVR
- Part No.:
- 74GTLPH306DGVR
- Manufacturer:
- Texas Instruments
- Category:
- Translators, Level Shifters
- Package:
- Datasheet:
-
74GTLPH306DGVR.pdf
- Description:
- IC TXRX NON-INVERT 3.45V 24TVSOP
- Quantity:
- Payment:
- Shipping:
Inventory:645
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Product details
Overview
74GTLPH306DGVR from Texas Instruments is an 8-bit LVTTL-to-GTLP bidirectional bus transceiver in a 24-pin TVSOP package, supporting hot insertion, bus-hold on A-port inputs, and TI-OPC/OEC circuitry for backplane signal integrity. It operates at 3.3 V supply with GTLP B-port outputs (50 mA drive), LVTTL A-port I/O (±24 mA), and VREF-referenced differential inputs - designed for high-speed communication between LVTTL cards and GTLP backplanes in telecom switching systems.
For engineers reviewing the 74GTLPH306DGVR datasheet, 74GTLPH306DGVR pinout, 74GTLPH306DGVR application, or 74GTLPH306DGVR equivalent, key selection criteria include GTLP/LVTTL level translation capability, medium-drive output performance (50 mA B-port sink), hot-insertion support via Ioff and power-up 3-state, bus-hold functionality, and compatibility with distributed-load backplanes down to 19 Ω impedance.
Technical Context
The 74GTLPH306DGVR implements asynchronous bidirectional data flow controlled by DIR and OE inputs: low OE enables transmission, while DIR selects A→B (DIR = high) or B→A (DIR = low). Its TI-OPC circuitry actively limits overshoot during low-to-high transitions on unevenly loaded backplanes, and OEC circuitry reduces EMI and improves settling time.
It features dual-voltage domain operation: A-port and control inputs tolerate 5 V and operate at LVTTL logic levels (VIH = 2 V, VIL = 0.8 V), while B-port uses GTLP signaling (VTT = 1.5 V, VREF = 1 V) with fast rise/fall times (tr/tf = 1.2/2.2 ns into RLC load). Bus-hold on A inputs eliminates need for external pull resistors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 3.15–3.45 V - ensures stable operation across industrial temperature range without rail collapse |
| B-port Output Drive | 50 mA sink - supports incident-wave switching on heavily loaded backplanes (ZLOAD ≥ 19 Ω) |
| A-port I/O Drive | ±24 mA - compatible with standard LVTTL/TTL loads and 5-V-tolerant input interfaces |
| Propagation Delay (A→B) | 3.6 ns typical into RLC load - optimized for distributed backplane timing budgets |
| Hot-Insertion Support | Ioff ≤ 10 µA at VCC = 0 - prevents backflow current during live card insertion |
| Bus-Hold Current | IBHL = 75 µA / IBHH = –75 µA - maintains valid logic state on undriven A-port inputs |
| VREF Input Range | 0.87–1.1 V - sets GTLP input threshold; must be within 0.6 V of VTT to minimize current drain |
Pinout & Package
74GTLPH306DGVR is housed in a 24-pin Thin Very Small Outline Package (TVSOP, DGV), 4.4 mm × 6.6 mm footprint, 1.2 mm max height, RoHS-compliant NIPDAU finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 6, 11, 14, 19, 22 | GND | Ground reference for both A- and B-port domains; six dedicated pins reduce ground bounce |
| 2, 23 | VCC | 3.3-V supply for internal logic and A-port drivers; dual connection improves PSRR |
| 3–10, 15–20 | A1–A8, B1–B8 | Bidirectional data channels; A-side LVTTL, B-side GTLP; pin-mapped 1:1 for trace routing |
| 12 | DIR | Direction control: high = A→B, low = B→A; TTL-compatible input with bus-hold |
| 13 | OE | Output enable: low = active, high = 3-state; controls isolation of both ports simultaneously |
| 21 | VREF | Differential reference voltage for B-port GTLP receivers; externally supplied at 1 V ±0.13 V |
Key Features
| Feature | Design Value |
|---|---|
| TI-OPC active overshoot control | Minimizes ringing on unevenly terminated backplanes during A→B transitions, preserving noise margin at >100 MHz |
| OEC signal integrity enhancement | Reduces bus settling time and EMI through optimized edge rate control and differential receiver design |
| Hot-insertion Ioff and power-up 3-state | Enables safe live insertion into powered backplanes without damaging current flow or bus contention |
| Bus-hold on all A-port inputs | Eliminates need for external pull resistors while maintaining valid logic states on floating or undriven lines |
| 5-V tolerant LVTTL interface | Allows direct connection to legacy 5-V TTL/CMOS logic without level-shifting components |
Applications
| Telecom Backplane Interfacing | High-Density Rack-Mounted Switching |
|---|---|
Use Scenario: Connecting LVTTL-based line-card processors to a GTLP-terminated central switch fabric backplane in carrier-grade routers. IC Role / Device Role / Timing Role: Bidirectional level translator and bus driver enabling synchronous data exchange between mismatched voltage domains. Use Value: Enables 3× faster backplane operation vs. LVTTL-only solutions while maintaining signal integrity across 10+ slot configurations. | Use Scenario: Hot-pluggable module interconnection in modular chassis where cards are inserted/removed without system shutdown. IC Role / Device Role / Timing Role: Isolation and translation element ensuring glitch-free bus arbitration during insertion/removal sequences. Use Value: Prevents bus contention and latch-up via Ioff and power-up 3-state, meeting JESD78 Class II latch-up immunity (>100 mA). |
| Industrial Control Backplane | Test Equipment Data Acquisition |
Use Scenario: Interfacing FPGA-based controller modules (LVTTL I/O) with GTLP-specified sensor aggregation backplanes in factory automation systems. IC Role / Device Role / Timing Role: Medium-drive transceiver providing deterministic propagation delay (3.6 ns A→B) for time-critical control loops. Use Value: Supports deterministic timing in distributed I/O architectures with up to 19 Ω characteristic impedance loading. | Use Scenario: High-speed digital pattern generation and capture between LVTTL test head controllers and GTLP-terminated DUT interface boards. IC Role / Device Role / Timing Role: Signal-level bridge enabling precise edge alignment between test controller and device-under-test logic families. Use Value: Delivers sub-5 ns propagation delay with <2.2 ns B-port fall time, critical for setup/hold compliance in 200+ Mbps test vectors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74GTLPH306DWR | SOIC-24 package (DW), same electrical specs, higher thermal resistance (θJA = 46°C/W vs. 86°C/W) | Better PCB heat dissipation in low-airflow environments; larger footprint limits high-density layouts | Select when thermal management prioritizes conduction over space constraints |
| SN74GTLPH306PWR | TSSOP-24 package (PW), identical pinout and specs, slightly wider body (4.4 mm vs. 4.3 mm) and different tape/reel packaging | Compatible with existing TSSOP assembly lines; marginally lower mechanical robustness than TVSOP in vibration-prone racks | Select when production line already supports PW package and board layout allows 0.1 mm extra width |
Compared with SN74GTLPH306DWR and SN74GTLPH306PWR, the 74GTLPH306DGVR offers the smallest PCB footprint (TVSOP), optimal for space-constrained telecom line cards, though with higher thermal resistance - making it ideal for applications where density outweighs steady-state power dissipation concerns.
Availability
74GTLPH306DGVR is available at Aetrix Electronics and suitable for telecom backplane interfacing, high-density rack-mounted switching, and industrial control backplane applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for 74GTLPH306DGVR 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 devices, with decades of expertise in high-speed interface solutions and signal integrity engineering.
The SN74GTLPH306 product line was developed specifically for GTLP-based backplane architectures in telecom infrastructure, addressing challenges of signal integrity, hot insertion, and mixed-voltage domain interoperability in multi-slot systems.
FAQ
What voltage levels does the 74GTLPH306DGVR support on its A-port and B-port?
The 74GTLPH306DGVR A-port and control inputs operate at LVTTL logic levels (VIH = 2 V, VIL = 0.8 V) and are 5-V tolerant, allowing direct interface with TTL and 5-V CMOS. The B-port operates at GTLP signal levels with VTT = 1.5 V and VREF = 1 V, enabling high-speed backplane communication. This dual-domain design is fundamental to the 74GTLPH306DGVR's role as a level-shifting transceiver in mixed-voltage systems.
Does the 74GTLPH306DGVR support hot insertion, and how is it implemented?
Yes, the 74GTLPH306DGVR fully supports hot insertion via two integrated features: Ioff circuitry disables outputs when VCC = 0, preventing damaging current backflow, and power-up 3-state places outputs in high-impedance during power ramp-up/down. These mechanisms are verified per JEDEC standards and ensure safe live insertion into powered backplanes - a core requirement addressed in the 74GTLPH306DGVR's design specification.
What is the function of the VREF pin on the 74GTLPH306DGVR, and what tolerance is required?
The VREF pin on the 74GTLPH306DGVR serves as the differential input reference voltage for the B-port GTLP receivers. It must be set to 1 V ±0.13 V (0.87–1.1 V) for GTLP operation and should remain within 0.6 V of VTT to minimize current drain. TI-OPC circuitry activates only when VTT exceeds VREF by >0.7 V, making precise VREF regulation essential for reliable 74GTLPH306DGVR operation in A→B mode.
How does the bus-hold feature work on the 74GTLPH306DGVR A-port inputs?
The 74GTLPH306DGVR integrates active bus-hold circuitry on all A-port inputs, sourcing or sinking up to ±75 µA to maintain a valid logic state (IBHH/IBHL) when inputs are floating or undriven. This eliminates the need for external pull-up/pull-down resistors and ensures deterministic behavior in partially populated backplane slots - a key reliability feature confirmed in the 74GTLPH306DGVR's functional description and electrical characteristics table.
What are the absolute maximum ratings for supply voltage and input voltage on the 74GTLPH306DGVR?
The 74GTLPH306DGVR has an absolute maximum VCC rating of –0.5 V to 4.6 V, and input voltage limits of –0.5 V to 7 V on A-port/control inputs and –0.5 V to 4.6 V on B-port/VREF pins. Exceeding these values risks permanent damage. These ratings are explicitly defined in the Absolute Maximum Ratings table of the official 74GTLPH306DGVR datasheet (SCES284E) and must be respected in all operating conditions.
74GTLPH306DGVR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74GTLPH
- Package/Case:
- Packaging:
- Bulk
- Product Status:
- Active
- Translator Type:
- Mixed Signal
- Channel Type:
- Bidirectional
- Number of Circuits:
- 1
- Channels per Circuit:
- 8
- Voltage - VCCA:
- -
- Voltage - VCCB:
- -
- Input Signal:
- LVTTL
- Output Signal:
- GTLP
- Output Type:
- Tri-State, Non-Inverted
- Data Rate:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Features:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-TFSOP (0.173", 4.40mm Width)
74GTLPH306DGVR FAQ
1.How can I place an order for 74GTLPH306DGVR through Aetrix?
Please submit a Request for Quotation (RFQ) for 74GTLPH306DGVR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for 74GTLPH306DGVR reliable?
The price and inventory of 74GTLPH306DGVR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74GTLPH306DGVR is usually 5 days.
3.What payment methods are accepted for 74GTLPH306DGVR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74GTLPH306DGVR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74GTLPH306DGVR?
74GTLPH306DGVR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74GTLPH306DGVR order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for 74GTLPH306DGVR?
For technical support, including 74GTLPH306DGVR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74GTLPH306DGVR requirements.
6.How does Aetrix verify that 74GTLPH306DGVR is sourced from the original manufacturer or authorized distributors?
All 74GTLPH306DGVR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that 74GTLPH306DGVR meets industry standards.
7.What is the process for return or replacement of 74GTLPH306DGVR?
All 74GTLPH306DGVR units undergo pre-shipment inspection (PSI). If there is an issue with 74GTLPH306DGVR, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The 74GTLPH306DGVR part is unused and in its original packaging.
Return procedure for 74GTLPH306DGVR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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