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Diodes Incorporated PI4GTL2014LE
- Part No.:
- PI4GTL2014LE
- Manufacturer:
- Diodes Incorporated
- Category:
- Translators, Level Shifters
- Package:
- Datasheet:
-
PI4GTL2014LE.pdf
- Description:
- IC TRANSLATOR UNIDIR 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,441
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Product details
Overview
PI4GTL2014LE from Diodes Incorporated is a 4-bit LVTTL-to-GTL translating transceiver in TSSOP-14 package, supporting bidirectional voltage-level translation between 3.3 V LVTTL and GTL−/GTL/GTL+ buses (Vref adjustable 0.5 V to VCC/2). It operates from 2.3 V to 3.6 V, features 5.5 V-tolerant LVTTL inputs, 3.6 V-tolerant GTL I/O, and enables high-speed bus interfacing in server memory subsystems and CPU-bridge interconnects.
For engineers reviewing the PI4GTL2014LE datasheet, PI4GTL2014LE pinout, PI4GTL2014LE application, or PI4GTL2014LE equivalent, key selection criteria include direction-controlled bidirectional translation, Vref programmability for GTL threshold alignment, 5.5 V-tolerant A-port inputs, propagation delays as low as 2.0 ns (An→Bn), and compatibility with GTL− (0.75 V VTT), GTL (1.2 V), and GTL+ (1.5 V) standards.
Technical Context
The PI4GTL2014LE implements a dual-voltage domain architecture: LVTTL-side (A0–A3, DIR) operates at 2.3–3.6 V with 5.5 V input tolerance, while GTL-side (B0–B3) interfaces at 0.75–1.5 V VTT with 3.6 V I/O tolerance. Direction control (DIR) selects signal flow-LOW enables LVTTL→GTL drive; HIGH enables GTL→LVTTL sampling.
Vref pin sets GTL input threshold (Vref ±50 mV), configurable across 0.5 V to VCC/2 to match GTL−, GTL, or GTL+ bus voltages. Partial power-down is supported via VCC biasing, and ESD robustness meets 2000 V HBM and 1000 V CDM per JESD22.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2.3 V to 3.6 V - Enables operation in 2.5 V and 3.3 V LVTTL systems without level-shifting rails. |
| LVTTL Input Tolerance | Up to 5.5 V - Allows direct connection to legacy 5 V TTL or CMOS logic without external clamping. |
| GTL I/O Tolerance | 3.6 V - Supports higher-voltage open-drain GTL bus termination schemes and robust noise margin. |
| Vref Range | 0.5 V to VCC/2 - Matches GTL− (0.75 V), GTL (1.2 V), and GTL+ (1.5 V) reference standards via external resistor divider. |
| Propagation Delay (An→Bn) | 2.0 ns (min) at VCC = 3.3 V - Meets timing budgets for high-speed CPU-to-memory address/data bus translation. |
| Output Drive (B port) | 40 mA sink - Sufficient for driving multiple GTL loads with ≤50 Ω termination resistance. |
| ESD Rating | 2000 V HBM, 1000 V CDM - Ensures reliability during board handling and system integration in industrial environments. |
Pinout & Package
TSSOP-14 (173 mil wide, Pb-free/Green, tape-and-reel) with exposed pad not present; thermal performance rated per Diodes Inc. packaging documentation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| DIR (Pin 1) | Direction control input | LVTTL-level signal selecting data flow: LOW = A→B (LVTTL driver), HIGH = B→A (GTL sampler). |
| A0–A3 (Pins 9,10,12,13) | LVTTL I/O port | 5.5 V-tolerant inputs when receiving; 3.3 V outputs when driving; connected to CPU/memory controller side. |
| B0–B3 (Pins 2,3,5,6) | GTL I/O port | 3.6 V-tolerant bidirectional interface to GTL bus; thresholds set by Vref; connected to bus stubs or backplane. |
| VREF (Pin 4) | Reference voltage input | Analog input setting GTL receiver threshold; requires stable low-noise source (e.g., resistor divider from VTT). |
| GND (Pins 7,8,11) | Ground reference | Three dedicated ground pins minimize switching noise coupling between LVTTL and GTL domains. |
| VCC (Pin 14) | Positive supply | Single 2.3–3.6 V rail powering internal logic and LVTTL output drivers; powers GTL receiver bias circuitry. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional translation mode | Hardware-selectable via DIR pin - eliminates need for external control logic or dual unidirectional devices. |
| Vref-adjustable GTL threshold | 0.5 V to VCC/2 range - supports interoperability across GTL−, GTL, and GTL+ specifications without redesign. |
| 5.5 V-tolerant LVTTL inputs | Direct interface to 5 V legacy logic - removes level-shifters in mixed-voltage board designs. |
| Low propagation skew | ≤3 ns max difference between An→Bn paths - preserves signal integrity in parallel bus applications like address latching. |
| Partial power-down capability | VCC biasing maintains GTL I/O high-impedance state - reduces leakage current during idle cycles in power-sensitive systems. |
Applications
| Server Memory Subsystem Interface | CPU-to-PCI Bridge Interconnect |
|---|---|
Use Scenario: Translating address and control signals between a 3.3 V LVTTL CPU and a GTL+ memory bus operating at 1.5 V VTT. IC Role / Device Role / Timing Role: Bidirectional level translator enabling synchronous data capture with <9 ns Bn→An propagation delay and matched tPLH/tPHL skew. Use Value: Eliminates timing closure issues caused by voltage-domain mismatch while maintaining signal fidelity across 10+ inch PCB traces. |
Use Scenario: Isolating GTL− (0.75 V VTT) PCI-X bus signals from 2.5 V LVTTL host bridge logic in enterprise storage controllers. IC Role / Device Role / Timing Role: Direction-controlled transceiver providing 5.5 V-tolerant A-port inputs for legacy configuration registers and GTL−-compliant B-port outputs. Use Value: Prevents bus contention during hot-plug events via controlled enable/disable sequencing and robust 2000 V HBM ESD protection. |
| Backplane-Based Telecomm Switch Fabric | Industrial PLC I/O Module Backplane |
Use Scenario: Interfacing multi-slot backplane GTL bus (1.2 V VTT) with LVTTL FPGA-based line cards requiring precise voltage translation and low jitter. IC Role / Device Role / Timing Role: GTL sampling receiver (DIR = HIGH) capturing high-speed status signals with Vref set to 0.8 V for optimal noise immunity. Use Value: Achieves >30 dB common-mode rejection on noisy backplane environments due to tightly controlled GTL input thresholds. |
Use Scenario: Connecting isolated 3.3 V LVTTL microcontroller I/O to GTL-compatible fieldbus transceivers in modular I/O chassis. IC Role / Device Role / Timing Role: LVTTL-to-GTL driver (DIR = LOW) delivering 40 mA sink current to meet IEC 61000-4-2 surge immunity requirements. Use Value: Maintains deterministic bus arbitration timing under EFT/burst noise due to low-output-impedance B-port drivers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LVTTL-to-GTL translation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74GTL2014PWR | TI part uses fixed 1.2 V internal Vref; no external Vref adjustment; 3.3 V only supply (no 2.5 V support). | Restricted to GTL (1.2 V) buses only; incompatible with GTL− or GTL+ without external resistive scaling. | Select when GTL standard is fixed and board space precludes external Vref divider. |
| 74GTLP2204APW | NXP part offers 2.5 V/3.3 V dual-supply operation but lacks 5.5 V LVTTL input tolerance; requires external clamping for 5 V signals. | Not suitable for mixed 5 V/3.3 V legacy system integration; limited to clean 2.5 V–3.3 V environments. | Select when full 5 V tolerance is unnecessary and lower quiescent current (<3 mA) is prioritized. |
Compared with SN74GTL2014PWR and 74GTLP2204APW, the PI4GTL2014LE uniquely supports adjustable Vref across GTL−/GTL/GTL+, 2.5 V–3.3 V supply flexibility, and 5.5 V-tolerant inputs-making it the only option for heterogeneous voltage-domain bridging in upgradeable server platforms.
Availability
PI4GTL2014LE is available at Aetrix Electronics and suitable for server memory subsystems, CPU-bridge interconnects, telecom switch fabrics, and industrial PLC backplanes requiring stable component supply across extended product lifecycles.
Supply support for PI4GTL2014LE 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-performance interface, power management, and signal integrity solutions for computing, industrial, and communications markets.
The PI4GTL2014LE belongs to Diodes' high-speed interface transceiver product line, engineered specifically for voltage-level translation in legacy and upgradeable server, storage, and networking infrastructure where GTL bus standards remain in use.
FAQ
What is the maximum allowable VTT voltage for GTL bus operation?
The PI4GTL2014LE supports GTL bus operation up to 3.6 V on B-port pins, but recommended VTT values are 0.75 V (GTL−), 1.2 V (GTL), or 1.5 V (GTL+) per specification. Exceeding 1.5 V VTT may degrade noise margin and is not validated for GTL+ compliance. VTT must be stable and low-noise to avoid false triggering at the Vref-based input threshold.
Can DIR be left floating during operation?
No. DIR must be actively driven HIGH or LOW; floating states cause undefined direction control and potential bus contention. Internal pull-up/pull-down resistors are not provided. Tie DIR to VCC via 10 kΩ resistor for default LVTTL→GTL mode or to GND for GTL→LVTTL mode if static configuration suffices.
Is the PI4GTL2014LE compatible with GTL+ signaling at 100 MHz?
Yes. With Vref = 1.0 V and VTT = 1.5 V, the device achieves 2.0 ns (min) tPLH and 7 ns (max) tPHL for An→Bn paths at 3.3 V VCC, supporting reliable 100 MHz data rates assuming proper PCB layout (controlled impedance, minimized stub length, and adequate decoupling).
Does the device support hot-swap or live-insertion on the GTL bus side?
The PI4GTL2014LE provides 3.6 V-tolerant B-port I/O and 2000 V HBM ESD protection, enabling robustness during hot-swap events. However, live insertion requires external circuitry (e.g., series resistors, slew-rate limiting) to limit inrush current and prevent GTL bus disturbance-no built-in hot-swap controller is integrated.
PI4GTL2014LE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- Packaging:
- Tube
- Product Status:
- Active
- Translator Type:
- Mixed Signal
- Channel Type:
- Bidirectional
- Number of Circuits:
- 1
- Channels per Circuit:
- 4
- Voltage - VCCA:
- -
- Voltage - VCCB:
- -
- Input Signal:
- GTL, LVTTL
- Output Signal:
- LVTTL, GTL
- Output Type:
- Open Drain
- Data Rate:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Features:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-TSSOP (0.173", 4.40mm Width)
PI4GTL2014LE FAQ
1.How can I place an order for PI4GTL2014LE through Aetrix?
Please submit a Request for Quotation (RFQ) for PI4GTL2014LE 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 PI4GTL2014LE reliable?
The price and inventory of PI4GTL2014LE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PI4GTL2014LE is usually 5 days.
3.What payment methods are accepted for PI4GTL2014LE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PI4GTL2014LE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PI4GTL2014LE?
PI4GTL2014LE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PI4GTL2014LE 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 PI4GTL2014LE?
For technical support, including PI4GTL2014LE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PI4GTL2014LE requirements.
6.How does Aetrix verify that PI4GTL2014LE is sourced from the original manufacturer or authorized distributors?
All PI4GTL2014LE 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 PI4GTL2014LE meets industry standards.
7.What is the process for return or replacement of PI4GTL2014LE?
All PI4GTL2014LE units undergo pre-shipment inspection (PSI). If there is an issue with PI4GTL2014LE, 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 PI4GTL2014LE part is unused and in its original packaging.
Return procedure for PI4GTL2014LE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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