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Texas Instruments SN74GTLPH306DW
- Part No.:
- SN74GTLPH306DW
- Manufacturer:
- Texas Instruments
- Category:
- Translators, Level Shifters
- Package:
- Datasheet:
-
SN74GTLPH306DW.pdf
- Description:
- IC TRANSLTR BIDIRECTIONAL 24SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,081
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Product details
Overview
SN74GTLPH306DW from Texas Instruments is an 8-bit LVTTL-to-GTLP bidirectional bus transceiver in SOIC-24 package, supporting hot insertion via Ioff and power-up 3-state, with medium-drive GTLP outputs (50 mA), LVTTL-compatible 5-V-tolerant 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 SN74GTLPH306DW datasheet, SN74GTLPH306DW pinout, SN74GTLPH306DW application, or SN74GTLPH306DW equivalent, this page delivers verified technical context, real-world switching performance into distributed loads, GTLP/LVTTL level translation constraints, bus-hold behavior on A-port inputs, and validated alternative options for backplane interface design.
Technical Context
The SN74GTLPH306DW implements asynchronous bidirectional data flow controlled by DIR and OE: low OE enables transmission, while DIR selects A→B (DIR = high) or B→A (DIR = low). Its GTLP B-port operates at VTT = 1.5 V and VREF = 1 V, with differential input thresholds optimized for noise margin in high-noise backplane environments.
TI-OPC circuitry actively limits overshoot during low-to-high transitions on unevenly loaded backplanes, and OEC improves signal integrity by reducing EMI. Bus-hold on all eight A-port inputs eliminates need for external pull resistors, and Ioff protection prevents current backflow when VCC = 0 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC supply | 3.15 V to 3.45 V - ensures stable operation across industrial temperature range without violating GTLP output swing or input threshold specs. |
| GTLP output drive | 50 mA sink per B-port - supports incident-wave switching on heavily loaded backplanes down to 19 Ω equivalent impedance. |
| LVTTL output drive | –24 mA / 24 mA - compatible with standard TTL/CMOS loads while maintaining 5-V tolerance on A-port inputs. |
| Propagation delay (A→B) | 7.5 ns typical - measured under GTLP conditions (VTT = 1.5 V, VREF = 1 V), enabling >100 MHz backplane data rates. |
| Rise/fall time (B outputs) | 2.2 ns / 2.1 ns (20%–80%) - optimized for minimal ringing and fast settling on distributed RLC backplane models. |
| Hot-insertion support | Ioff ≤ 10 µA at VCC = 0 V - prevents damaging back-current during live card insertion into powered backplane. |
| Bus-hold current | IBHL ≥ 75 µA / IBHH ≥ –75 µA - maintains valid logic state on undriven A-port inputs without external biasing. |
Pinout & Package
SN74GTLPH306DW uses a 24-pin SOIC (DW) package, 7.5 mm × 12.8 mm body, 1.27 mm pitch, with exposed thermal pad not present. Pin 1 index located at top-left corner of top view.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 6, 11, 14, 19, 22 | GND | Ground reference for both A- and B-port signal domains; six dedicated GND pins minimize ground bounce in high-speed switching. |
| 2, 23 | VCC | Main 3.3-V supply for internal logic and A-port drivers; dual VCC pins reduce IR drop and improve PSRR. |
| 3–10 | A1–A8 | LVTTL data inputs/outputs (5-V tolerant); bus-hold active when undriven; noninverting polarity. |
| 12 | DIR | Direction control: high = A→B, low = B→A; TTL-compatible input referenced to VCC. |
| 13 | VREF | B-port differential input reference voltage (typically 1.0 V); sets GTLP input threshold and noise margin. |
| 15–20 | B1–B8 | GTLP data I/Os; terminated to VTT = 1.5 V; require external 38-Ω or 70-Ω backplane termination per JEDEC JESD8-3. |
| 21 | OE | Output enable: low = active, high = high-Z; controls isolation of both A and B ports simultaneously. |
Key Features
| Feature | Design Value |
|---|---|
| TI-OPC active overshoot control | Reduces signal ringing on unevenly loaded backplanes by dynamically limiting edge rate during low-to-high transitions. |
| OEC circuitry | Improves signal integrity and lowers radiated EMI through optimized output stage slew control and reduced crosstalk. |
| Medium-drive GTLP outputs | 50 mA sink capability enables incident-wave switching on backplanes with load impedance as low as 19 Ω. |
| Bus-hold on A-port inputs | Eliminates need for external pull-up/down resistors on A1–A8, simplifying PCB layout and reducing component count. |
| Hot-insertion support | Ioff ≤ 10 µA and power-up 3-state ensure safe insertion into live backplane without disrupting system operation. |
Applications
| Telecom Backplane Interface | Industrial Control Chassis |
|---|---|
|
Use Scenario: Interfacing LVTTL-based line cards with GTLP-terminated central backplane in carrier-grade switching systems. IC Role / Device Role / Timing Role: Bidirectional level translator and bus isolator, synchronizing data flow between card-local logic and shared backplane domain. Use Value: Enables >100 MHz data transfer with <7.5 ns propagation delay and TI-OPC–suppressed overshoot on mismatched stub lengths. |
Use Scenario: Connecting modular I/O processor boards to a GTLP-fabric backplane in programmable logic controller (PLC) chassis. IC Role / Device Role / Timing Role: Hot-pluggable bus transceiver providing galvanically isolated signal translation between 3.3-V LVTTL modules and 1.5-V GTLP infrastructure. Use Value: Maintains signal integrity across 10+ slot backplanes using distributed-load optimized rise/fall times (1.2–2.2 ns). |
| High-Density Data Acquisition Rack | Test Equipment Backplane |
|
Use Scenario: Aggregating sensor data from multiple LVTTL ADC/DAC modules onto a centralized GTLP data fabric in automated test systems. IC Role / Device Role / Timing Role: Asynchronous 8-bit transceiver managing burst-mode transfers with direction control per channel group. Use Value: Supports deterministic latency via fixed 7–8 ns enable/disable timing and bus-hold–stabilized idle states during reconfiguration. |
Use Scenario: Enabling modular instrument card interoperability in PXI-style test platforms where backplane signaling must meet JEDEC JESD8-3 GTLP compliance. IC Role / Device Role / Timing Role: Standardized GTLP interface IC ensuring signal-level compatibility across vendor-specific LVTTL instrument modules. Use Value: Delivers JESD8-3–aligned GTLP timing (VTT = 1.5 V, VREF = 1.0 V) with latch-up immunity >100 mA per JESD78 Class II. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74GTLPH16306DGGR | 16-bit version in TVSOP-48; identical GTLP/LVTTL translation architecture and TI-OPC/OEC features. | Requires PCB redesign for wider bus width and different pinout; suited for higher-bandwidth chassis with parallel 16-bit paths. | Select when system requires double data width and can accommodate larger footprint and higher pin count. |
| SN74GTL2003DW | 8-bit GTL-only (not GTLP) transceiver; VTT = 1.2 V, VREF = 0.8 V; lower noise margin; no TI-OPC circuitry. | Limited to legacy GTL backplanes; lacks overshoot suppression and distributed-load optimization of SN74GTLPH306DW. | Choose only for cost-sensitive GTL-only systems where TI-OPC and enhanced noise margin are unnecessary. |
Compared with SN74GTLPH16306DGGR and SN74GTL2003DW, the SN74GTLPH306DW uniquely balances 8-bit width, SOIC-24 compactness, full GTLP compliance (VTT = 1.5 V), and TI-OPC–enabled signal integrity-making it optimal for space-constrained, high-reliability backplane interfaces requiring hot insertion and distributed-load robustness.
Availability
SN74GTLPH306DW is available at Aetrix Electronics and suitable for telecom backplane interfaces, industrial PLC chassis, high-density data acquisition racks, and test equipment backplanes requiring stable component supply and long-term lifecycle continuity.
Supply support for SN74GTLPH306DW 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 decades of expertise in high-speed interface ICs and backplane technologies.
The SN74GTLPH306DW belongs to TI's GTLP logic family, designed specifically for robust, high-frequency communication between LVTTL logic subsystems and GTLP-terminated backplanes in telecom, industrial, and test equipment applications.
FAQ
What is the maximum recommended VTT voltage for SN74GTLPH306DW in GTLP mode?
The SN74GTLPH306DW supports GTLP mode with VTT = 1.35 V to 1.65 V (nominal 1.5 V) and VREF = 0.87 V to 1.1 V (nominal 1.0 V). Operating outside this range risks violating input threshold specifications or degrading TI-OPC effectiveness. The SN74GTLPH306DW datasheet specifies that VREF should be set within 0.6 V of VTT to minimize current drain and maintain optimal noise margin.
Does SN74GTLPH306DW support GTL mode (VTT = 1.2 V) in addition to GTLP?
Yes, the SN74GTLPH306DW supports both GTL (VTT = 1.2 V, VREF = 0.8 V) and GTLP (VTT = 1.5 V, VREF = 1.0 V) modes. However, ac specifications-including propagation delay and rise/fall times-are guaranteed only for GTLP conditions. The SN74GTLPH306DW retains full functionality in GTL mode but with reduced noise margin and no TI-OPC activation unless VTT exceeds VREF by >0.7 V.
How does bus-hold operate on the A-port inputs of SN74GTLPH306DW?
The SN74GTLPH306DW integrates active bus-hold circuitry on all eight A-port inputs (A1–A8), sustaining valid logic levels without external resistors. It sources ≥75 µA at VI = 0.8 V (low hold) and sinks ≥75 µA at VI = 2 V (high hold). Using pull-up/down resistors with bus-hold is explicitly discouraged in the SN74GTLPH306DW datasheet due to potential contention and increased power draw.
What is the minimum load impedance the SN74GTLPH306DW can drive on the B port?
The SN74GTLPH306DW is characterized for incident-wave switching on backplanes with equivalent load impedance down to 19 Ω, enabled by its 50 mA GTLP output drive strength. This value is validated using TI's medium-drive RLC backplane model (19 nH inductance, 9 pF capacitance, 19 Ω termination). Driving lower impedances may exceed IOL ratings or violate VOL specs under worst-case VCC and temperature conditions.
Is SN74GTLPH306DW pin-compatible with other packages in the same family?
No, SN74GTLPH306DW (SOIC-24) is not pin-compatible with SN74GTLPH306PWR (TSSOP-24) or SN74GTLPH306DGVR (TVSOP-24), despite identical pin functions. Mechanical dimensions, lead pitch (1.27 mm vs. 0.65 mm), and pin 1 location differ across DW, PW, and DGV packages. PCB layout must be redesigned for each package variant; the SN74GTLPH306DW requires SOIC-specific land pattern per TI's DW0024A outline.
SN74GTLPH306DW 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-SOIC (0.295", 7.50mm Width)
SN74GTLPH306DW FAQ
1.How can I place an order for SN74GTLPH306DW through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74GTLPH306DW 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 SN74GTLPH306DW reliable?
The price and inventory of SN74GTLPH306DW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74GTLPH306DW is usually 5 days.
3.What payment methods are accepted for SN74GTLPH306DW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74GTLPH306DW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74GTLPH306DW?
SN74GTLPH306DW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74GTLPH306DW 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 SN74GTLPH306DW?
For technical support, including SN74GTLPH306DW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74GTLPH306DW requirements.
6.How does Aetrix verify that SN74GTLPH306DW is sourced from the original manufacturer or authorized distributors?
All SN74GTLPH306DW 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 SN74GTLPH306DW meets industry standards.
7.What is the process for return or replacement of SN74GTLPH306DW?
All SN74GTLPH306DW units undergo pre-shipment inspection (PSI). If there is an issue with SN74GTLPH306DW, 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 SN74GTLPH306DW part is unused and in its original packaging.
Return procedure for SN74GTLPH306DW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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