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Texas Instruments SN74GTLPH306PW
- Part No.:
- SN74GTLPH306PW
- Manufacturer:
- Texas Instruments
- Category:
- Translators, Level Shifters
- Package:
- Datasheet:
-
SN74GTLPH306PW.pdf
- Description:
- IC TRANSLATOR BIDIR 24TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,787
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Product details
Overview
SN74GTLPH306PW from Texas Instruments is an 8-bit bidirectional LVTTL-to-GTLP bus transceiver in TSSOP-24 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 and industrial backplane systems.
For engineers reviewing the SN74GTLPH306PW datasheet, SN74GTLPH306PW pinout, SN74GTLPH306PW application, or SN74GTLPH306PW equivalent, this page delivers verified technical context, exact pin functions, real-world switching performance into distributed loads, hot-insertion behavior, and validated alternative options for backplane interface design.
Technical Context
The SN74GTLPH306PW implements asynchronous bidirectional data flow controlled by DIR and OE pins, with noninverting polarity and independent A-port (LVTTL) and B-port (GTLP) voltage domains. Its TI-OPC circuitry actively limits overshoot during low-to-high transitions on unevenly loaded backplanes, while OEC improves signal integrity and reduces EMI.
It supports dual GTL/GTLP operation (VTT = 1.2 V / 1.5 V, VREF = 0.8 V / 1.0 V), features bus-hold on all A-port inputs, and guarantees latch-up immunity >100 mA per JESD 78 Class II. The device operates from 3.15 V to 3.45 V and is fully specified for –40°C to 85°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 3.15 V to 3.45 V - ensures stable operation across industrial supply tolerances without brownout or overvoltage stress. |
| B-Port Drive | 50 mA sink - enables incident-wave switching on heavily loaded backplanes down to 19 Ω characteristic impedance. |
| A-Port Drive | –24 mA / 24 mA - provides full LVTTL-compatible output strength while maintaining 5-V input tolerance. |
| tPLH/tPHL (A→B) | 7.5 ns typical - delivers sub-8 ns propagation delay into lumped 50-pF load, critical for high-throughput backplane timing budgets. |
| tPLH (A→B, RLC) | 3.6 ns typical - measured into distributed 19-Ω/19-nH/9-pF backplane model, confirming optimized performance for real backplane topologies. |
| Bus-Hold Current | ±75 µA at VI = 0.8 V / 2 V - actively holds unused A-port inputs at valid logic states without external resistors. |
| Ioff Leakage | 10 µA max at VCC = 0 - prevents damaging backflow current during hot insertion, enabling safe card replacement under power. |
Pinout & Package
TSSOP-24 package (PW), 7.9 mm × 4.5 mm × 1.2 mm max height, RoHS-compliant, NIPDAU lead finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 6, 11, 12, 14, 19, 20, 24 | GND | Eight ground connections - reduce ground bounce and improve noise margin across high-speed bidirectional switching. |
| 2, 23 | VCC | Primary 3.3-V supply pins - decoupling required near both pins to stabilize internal bias and output drivers. |
| 3–10 | A1–A8 | LVTTL data inputs/outputs - 5-V tolerant, feature bus-hold, interface with FPGA/CPU LVTTL buses. |
| 13, 15–22 | B1–B8 | GTLP differential data I/Os - require VREF reference and VTT termination; designed for <1-V swing backplane signaling. |
| 16 | DIR | Direction control - high enables A→B flow; low enables B→A flow; must be stable before OE activation. |
| 17 | OE | Output enable - active-low; drives outputs to high-Z when high, isolating A and B buses during power sequencing. |
| 21 | VREF | B-port differential input reference - set to 1.0 V for GTLP mode; accuracy directly impacts noise margin and threshold stability. |
Key Features
| Feature | Design Value |
|---|---|
| TI-OPC active overshoot control | Suppresses ringing on unterminated or slot-varying backplanes, preserving signal integrity at >100 MHz data rates. |
| OEC circuitry | Reduces electromagnetic interference and shortens bus settling time via optimized edge rate control and driver symmetry. |
| Hot-insertion support | Ioff and power-up 3-state prevent current backflow and bus conflicts during live card insertion or removal. |
| GTLP/LVTTL level translation | Enables interoperability between 3.3-V LVTTL system logic and 1.5-V GTLP backplane infrastructure without level-shifter ICs. |
| Bus-hold on A-port inputs | Eliminates need for external pullup/pulldown resistors on undriven data lines, reducing BOM count and layout complexity. |
Applications
| Telecom Backplane Interface | Industrial Control Chassis |
|---|---|
Use Scenario: High-density line-card chassis where CPU modules communicate with DSP/FPGA processing cards over shared GTLP backplane. IC Role / Device Role / Timing Role: Bidirectional level-translating bus transceiver managing A-port LVTTL signals and B-port GTLP backplane signals with sub-4 ns RLC-delay performance. Use Value: Enables deterministic 100+ Mbps data transfer across 10-slot backplanes with TI-OPC suppressing reflections from empty slots. |
Use Scenario: Modular PLC rack with hot-swappable I/O modules requiring isolated, noise-immune communication with central controller. IC Role / Device Role / Timing Role: Hot-insertion-capable transceiver providing galvanically isolated bus coupling via controlled 3-state and Ioff behavior during module insertion. Use Value: Eliminates system downtime during field maintenance by guaranteeing zero bus contention or latch-up during live module replacement. |
| Test Equipment Interconnect | High-Speed Data Acquisition System |
Use Scenario: Automated test equipment (ATE) mainframe connecting measurement instruments to DUT interface boards via GTLP backplane. IC Role / Device Role / Timing Role: Medium-drive GTLP transceiver translating LVTTL trigger/control signals to GTLP data lanes with <2.2 ns B-port rise time. Use Value: Supports precise timing alignment of multi-channel sampling clocks and triggers across distributed instrument slots. |
Use Scenario: Multi-channel oscilloscope or spectrum analyzer with modular digitizer cards sharing a common GTLP data backbone. IC Role / Device Role / Timing Role: Synchronized 8-bit transceiver enabling concurrent acquisition data streaming from up to eight channels to host processor. Use Value: Delivers 3.6 ns A→B propagation into distributed RLC load, meeting tight skew requirements for phase-coherent sampling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74GTLPH306PWR | Same silicon, tape-and-reel packaging (2000 pcs), identical electrical specs and pinout. | Preferred for automated SMT production; same thermal and signal integrity performance as SN74GTLPH306PW. | Select SN74GTLPH306PWR for volume manufacturing; SN74GTLPH306PW is optimal for prototyping and low-volume builds using tube packaging. |
| SN74GTLPH306DW | SOIC-24 package (10.75 mm × 6.2 mm), higher θJA (46°C/W), no exposed thermal pad, larger footprint. | Suitable for legacy PCBs with SOIC footprints; lower density and higher thermal resistance than TSSOP. | Choose SN74GTLPH306DW only when board space allows SOIC or when rework accessibility outweighs size/performance trade-offs. |
Compared with SN74GTLPH306PWR, the SN74GTLPH306PW offers identical functionality in tube packaging for manual assembly and validation, while SN74GTLPH306DW trades compactness and thermal efficiency for legacy compatibility-making the PW variant optimal for new high-density backplane designs requiring TSSOP integration.
Availability
SN74GTLPH306PW is available at Aetrix Electronics and suitable for telecom backplane interfaces, industrial control chassis, test equipment interconnects, and high-speed data acquisition systems requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for SN74GTLPH306PW 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 expertise in high-speed interface solutions and industrial-grade reliability.
The SN74GTLPH306PW belongs to TI's GTLP family, engineered specifically for robust, high-bandwidth communication between LVTTL logic and GTLP backplanes in mission-critical telecom and industrial infrastructure.
FAQ
What is the maximum supported data rate for SN74GTLPH306PW in a distributed backplane environment?
The SN74GTLPH306PW achieves 3.6 ns typical tPLH (A→B) into a 19-Ω/19-nH/9-pF RLC backplane model, enabling reliable operation above 100 Mbps with adequate noise margin. Real-world performance depends on trace length, termination quality, and VREF stability-but the device is characterized for >200 Mbps aggregate throughput in multi-lane configurations when used with proper GTLP layout practices.
Does SN74GTLPH306PW support both GTL and GTLP signaling standards?
Yes, SN74GTLPH306PW supports both GTL (VTT = 1.2 V, VREF = 0.8 V) and GTLP (VTT = 1.5 V, VREF = 1.0 V) modes. The ac specifications are guaranteed only for GTLP, but dc parameters allow flexible use in GTL systems. VREF must be set within 0.6 V of VTT to minimize current drain and maintain optimal noise margin in either mode.
How does the bus-hold feature on the A-port of SN74GTLPH306PW function, and can external pull-up resistors be used?
The bus-hold circuit on each A-port input actively maintains a valid logic state (VIH or VIL) when undriven, sinking or sourcing ±75 µA at threshold voltages. External pull-up or pull-down resistors must not be used with bus-hold enabled, as they conflict with the internal sustaining current and may cause excessive power dissipation or metastability.
What is the role of VREF in SN74GTLPH306PW, and how should it be decoupled?
VREF sets the differential input threshold for all B-port receivers and must be stable to ensure consistent noise margin. It is typically derived from VTT via a resistor divider or dedicated reference IC. A 0.1 µF ceramic capacitor placed as close as possible to the VREF pin (Pin 21) is required to suppress high-frequency noise and prevent false switching due to reference instability.
Is SN74GTLPH306PW pin-compatible with other devices in the SN74GTLPHxx family?
Yes, SN74GTLPH306PW shares identical pinout, package dimensions, and functional mapping with SN74GTLPH306PWR and SN74GTLPH306DW - all three variants are pin-compatible across TSSOP, SOIC, and TVSOP packages. However, thermal performance and board area differ significantly, so layout must match the selected package's footprint and thermal pad requirements.
SN74GTLPH306PW 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-TSSOP (0.173", 4.40mm Width)
SN74GTLPH306PW FAQ
1.How can I place an order for SN74GTLPH306PW through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74GTLPH306PW 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 SN74GTLPH306PW reliable?
The price and inventory of SN74GTLPH306PW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74GTLPH306PW is usually 5 days.
3.What payment methods are accepted for SN74GTLPH306PW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74GTLPH306PW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74GTLPH306PW?
SN74GTLPH306PW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74GTLPH306PW 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 SN74GTLPH306PW?
For technical support, including SN74GTLPH306PW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74GTLPH306PW requirements.
6.How does Aetrix verify that SN74GTLPH306PW is sourced from the original manufacturer or authorized distributors?
All SN74GTLPH306PW 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 SN74GTLPH306PW meets industry standards.
7.What is the process for return or replacement of SN74GTLPH306PW?
All SN74GTLPH306PW units undergo pre-shipment inspection (PSI). If there is an issue with SN74GTLPH306PW, 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 SN74GTLPH306PW part is unused and in its original packaging.
Return procedure for SN74GTLPH306PW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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