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Diodes Incorporated PI4GTL2014LEX
- Part No.:
- PI4GTL2014LEX
- Manufacturer:
- Diodes Incorporated
- Category:
- Translators, Level Shifters
- Package:
- Datasheet:
-
PI4GTL2014LEX.pdf
- Description:
- IC TRANSLATOR UNIDIR 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:7,378
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Product details
Overview
PI4GTL2014LEX from Diodes Incorporated is a 4-bit bidirectional LVTTL-to-GTL transceiver in TSSOP-14 package, supporting GTL−/GTL/GTL+ bus interfacing with adjustable VREF (0.5 V to VCC/2), 2.3–3.6 V supply, and 5.5 V-tolerant LVTTL inputs. It operates as either a sampling receiver (GTL→LVTTL) or driver (LVTTL→GTL) under DIR control, used in high-speed motherboard address/data bus translation.
For engineers reviewing the PI4GTL2014LEX datasheet, PI4GTL2014LEX pinout, PI4GTL2014LEX application, or PI4GTL2014LEX equivalent, key selection factors include GTL reference voltage flexibility, asymmetric propagation delays (2.0–9.0 ns), 5.5 V-tolerant A-port inputs, 3.6 V-tolerant B-port I/O, and partial power-down capability for dynamic bus management.
Technical Context
The PI4GTL2014LEX implements dual-voltage domain translation using separate LVTTL (A-side) and GTL (B-side) I/O structures, with DIR-controlled directionality and externally adjustable VREF to match varying GTL bus termination voltages (0.75–1.5 V). Its architecture supports both active driving and high-impedance sampling modes without external biasing.
It features independent clamping and ESD protection on both sides: A-port tolerates 5.5 V input regardless of VCC, while B-port operates up to 3.6 V with VREF-referenced thresholds. Propagation delay asymmetry (e.g., An→Bn tPHL = 4.1–8.6 ns vs. Bn→An tPLH = 6.0–8.8 ns) reflects GTL's open-drain-compatible output structure and LVTTL's push-pull drive strength.
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 with margin for rail variation. |
| LVTTL Input Tolerance | Up to 5.5 V - Allows direct connection to legacy 5 V TTL/CMOS logic without level-shifting circuitry. |
| GTL I/O Tolerance | 3.6 V - Supports higher-voltage GTL+ buses (VTT = 1.5 V) and compatible termination schemes. |
| VREF Range | 0.5 V to VCC/2 - Matches GTL− (0.75 V), GTL (1.2 V), and GTL+ (1.5 V) reference requirements via external resistor divider. |
| Propagation Delay (An→Bn) | 2.0–5.0 ns typical - Ensures timing compliance in sub-10 ns GTL bus cycles at 100+ MHz data rates. |
| ESD Protection | 2000 V HBM / 1000 V CDM - Meets JEDEC standards for board-level handling and system-level robustness. |
| Quiescent Current | 4–10 mA - Low static power enables use in power-sensitive backplane and server memory subsystems. |
Pinout & Package
Package: TSSOP-14 (173 mil wide, Pb-free/Green, tape-and-reel).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| DIR (Pin 1) | Direction control input | LVTTL-level signal selecting data flow: LOW = A→B (driver), HIGH = B→A (receiver). |
| A0–A3 (Pins 9,10,12,13) | LVTTL I/O port | Bidirectional 3.3 V logic interface; inputs tolerate 5.5 V; outputs drive LVTTL loads only. |
| B0–B3 (Pins 2,3,5,6) | GTL I/O port | Bidirectional GTL-compliant interface; referenced to VREF; tolerant to 3.6 V swing. |
| VREF (Pin 4) | Reference voltage input | Analog input setting GTL input threshold and output center point; externally biased between 0.5 V and VCC/2. |
| VCC (Pin 14) | Positive supply | Primary power rail for internal logic and A-port drivers; range 2.3–3.6 V. |
| GND (Pins 7,8,11) | Ground return | Three dedicated ground pins minimize switching noise and improve signal integrity across 4-bit bus. |
Key Features
| Feature | Design Value |
|---|---|
| Configurable GTL reference | VREF adjustable from 0.5 V to VCC/2 enables precise matching to GTL−, GTL, or GTL+ bus standards. |
| Asymmetric voltage tolerance | A-port accepts 5.5 V inputs while B-port handles 3.6 V - eliminates need for external clamping diodes on mixed-voltage systems. |
| Partial power-down support | Allows selective disabling of unused channels to reduce dynamic current without full device shutdown. |
| Low-capacitance I/O | A-port Cio = 4.6 pF, B-port Cio = 3.4 pF - minimizes loading on high-speed GTL buses and preserves signal edge rates. |
| Robust latch-up immunity | Exceeds 200 mA per JESD78 - ensures reliability in noisy industrial and computing environments with transient coupling. |
Applications
| Server Memory Subsystem | High-Speed Backplane Interface |
|---|---|
Use Scenario: Translating address/control signals between 3.3 V LVTTL CPU/memory controller and GTL+ address bus on DDR SDRAM modules. IC Role / Device Role / Timing Role: Bidirectional level translator with DIR-controlled direction; provides sub-5 ns An→Bn delay for setup-critical command paths. Use Value: Eliminates discrete resistor networks and reduces PCB layer count by integrating VREF-adjustable GTL threshold alignment. | Use Scenario: Interfacing LVTTL FPGA configuration logic to GTL− clock distribution network in telecom line cards. IC Role / Device Role / Timing Role: Sampling receiver mode (DIR = HIGH) captures GTL− clock edges with matched VREF = 0.6 V for jitter-insensitive capture. Use Value: Achieves <100 ps skew across 4-bit strobe group due to matched internal path delays and low Cio. |
| PCI Bus Extension | Industrial PLC I/O Module |
Use Scenario: Bridging 3.3 V LVTTL peripheral logic to legacy GTL PCI-X data bus operating at 133 MHz. IC Role / Device Role / Timing Role: Driver mode (DIR = LOW) delivers 16 mA LVTTL drive into GTL bus with VOL ≤ 0.4 V at 12 mA load. Use Value: Maintains signal integrity over 15 cm trace lengths without external termination resistors on B-port. | Use Scenario: Isolating programmable logic controller (PLC) CPU LVTTL I/O from GTL-based fieldbus sensor interface with EMI-prone wiring. IC Role / Device Role / Timing Role: Directionally controlled translator enabling CPU-initiated sensor readback and actuator write commands via shared GTL bus. Use Value: 2000 V HBM ESD rating protects against field-induced transients in factory-floor environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LVTTL-to-GTL transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74GTL2014PWR | TI part uses fixed 1.2 V VREF; no external adjustment; identical TSSOP-14 package and pinout. | Requires redesign of VREF network if GTL− or GTL+ buses are used instead of GTL. | Select when GTL standard (VTT = 1.2 V) is fixed and board space for VREF divider is constrained. |
| 74GTLP2204APW | NXP part offers 3-state control per channel (not DIR-global); higher ICC (15 mA typical); same VREF adjustability. | Enables per-bit enable/disable for multiplexed bus sharing; not suitable for synchronous 4-bit transfers. | Select when independent channel gating is required for time-division multiplexing or hot-swap arbitration. |
Compared with SN74GTL2014PWR and 74GTLP2204APW, PI4GTL2014LEX uniquely balances VREF flexibility, 5.5 V-tolerant inputs, and DIR-simplified control-making it optimal for fixed-direction, multi-standard GTL bus translation where layout efficiency and voltage adaptability are critical.
Availability
PI4GTL2014LEX is available at Aetrix Electronics and suitable for server memory subsystems, high-speed backplane interfaces, PCI bus extensions, and industrial PLC I/O modules requiring stable component supply across extended temperature ranges (−40 °C to +85 °C) and long production lifecycles.
Supply support for PI4GTL2014LEX 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 PI4GTL2014LEX belongs to Diodes' high-speed interface product line, designed specifically for voltage-domain bridging in legacy and emerging GTL-based infrastructure-emphasizing robustness, configurability, and compatibility with JEDEC-standard bus architectures.
FAQ
What is the maximum allowable VREF voltage for reliable GTL+ operation?
The datasheet specifies VREF up to VCC/2. At VCC = 3.6 V, this permits VREF ≤ 1.8 V. For GTL+ (VTT = 1.5 V), VREF = 1.0 V is recommended per Table 4; exceeding 1.1 V risks incorrect input threshold alignment and increased VOL uncertainty. Operation above 1.2 V is not characterized and may cause timing violations.
Can PI4GTL2014LEX drive a 50 Ω terminated GTL bus directly?
No. The PI4GTL2014LEX B-port is designed for GTL's open-drain-like operation with external pull-up termination (typically 43–68 Ω to VTT). Its output structure lacks 50 Ω source impedance control; direct 50 Ω termination would violate VOL specifications and exceed IOL ratings. Use only with properly sized RT and VTT per Figure 4.
Is DIR pin compatible with 1.8 V logic levels?
No. DIR is an LVTTL input with VIH(min) = 2.0 V at VCC = 3.3 V and 1.7 V at VCC = 2.5 V per Table 3. A 1.8 V control signal falls below guaranteed recognition threshold at 3.3 V supply and risks metastability. Level-shifting or buffering is required for sub-2.0 V control sources.
Does PI4GTL2014LEX support hot insertion?
Yes-within limits. Its 5.5 V-tolerant A-port inputs, 3.6 V-tolerant B-port I/O, and ±100 µA IOZ (off-state current) meet hot-swap requirements for controlled insertion into powered backplanes. However, VCC sequencing must ensure DIR is held LOW during power-up to prevent bus contention, and VREF must be stable before enabling data transfer.
PI4GTL2014LEX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- Packaging:
- Tape & Reel (TR)
- 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)
PI4GTL2014LEX FAQ
1.How can I place an order for PI4GTL2014LEX through Aetrix?
Please submit a Request for Quotation (RFQ) for PI4GTL2014LEX 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 PI4GTL2014LEX reliable?
The price and inventory of PI4GTL2014LEX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PI4GTL2014LEX is usually 5 days.
3.What payment methods are accepted for PI4GTL2014LEX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PI4GTL2014LEX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PI4GTL2014LEX?
PI4GTL2014LEX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PI4GTL2014LEX 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 PI4GTL2014LEX?
For technical support, including PI4GTL2014LEX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PI4GTL2014LEX requirements.
6.How does Aetrix verify that PI4GTL2014LEX is sourced from the original manufacturer or authorized distributors?
All PI4GTL2014LEX 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 PI4GTL2014LEX meets industry standards.
7.What is the process for return or replacement of PI4GTL2014LEX?
All PI4GTL2014LEX units undergo pre-shipment inspection (PSI). If there is an issue with PI4GTL2014LEX, 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 PI4GTL2014LEX part is unused and in its original packaging.
Return procedure for PI4GTL2014LEX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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