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NXP Semiconductors GTL2012DP,118
- Part No.:
- GTL2012DP,118
- Manufacturer:
- NXP Semiconductors
- Category:
- Translators, Level Shifters
- Package:
- Datasheet:
-
GTL2012DP,118.pdf
- Description:
- IC TRANSLTR BIDIRECTIONAL 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,492
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Product details
Overview
GTL2012DP,118 from NXP Semiconductors is a 2-bit bidirectional translating transceiver enabling interface between 3.3 V LVTTL systems and GTL−/GTL/GTL+ buses. It supports dual-directional translation (LVTTL ↔ GTL), features 5.5 V-tolerant LVTTL inputs, adjustable VREF (0.5 V to 0.5VCC), and operates from 3.0 V to 3.6 V. Used in high-speed backplane and motherboard bus interfaces where voltage-level bridging and low propagation delay (<8 ns) are critical.
For engineers reviewing the GTL2012DP,118 datasheet, GTL2012DP,118 pinout, GTL2012DP,118 application, or GTL2012DP,118 equivalent, this page delivers verified electrical parameters, directional control behavior, GTL reference voltage configuration, TSSOP8 package details, and validated alternative options for system-level bus interfacing.
Technical Context
The GTL2012DP,118 implements a direction-controlled dual-port architecture: DIR = HIGH enables A→B (LVTTL-to-GTL) translation; DIR = LOW enables B→A (GTL-to-LVTTL sampling). Its GTL-side I/Os are tolerant to 3.6 V, while LVTTL inputs withstand up to 5.5 V - enabling direct connection to legacy TTL or 5 V CMOS logic without level-shifting circuitry.
Propagation delays are asymmetric: A→B paths exhibit tPLH/tPHL ≤5 ns / ≤7 ns, whereas B→A paths show higher latency (tPLH/tPHL ≤8 ns / ≤7 ns), reflecting GTL's differential-sensing nature and internal sampling design. VREF is externally adjustable (0.5 V to 0.5VCC) to match GTL− (0.6 V), GTL (0.8 V), or GTL+ (1.0 V) standards per JEDEC specifications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC range | 3.0 V to 3.6 V - ensures compatibility with standard 3.3 V supply rails and tolerates typical board-level ripple. |
| LVTTL input tolerance | Up to 5.5 V - allows direct interfacing with 5 V TTL/CMOS signals without external clamping or resistive dividers. |
| GTL I/O tolerance | 3.6 V - supports safe operation across GTL−, GTL, and GTL+ termination voltages (0.9 V, 1.2 V, 1.5 V). |
| VREF adjustability | 0.5 V to 0.5VCC - enables precise matching to GTL− (0.6 V), GTL (0.8 V), or GTL+ (1.0 V) reference requirements. |
| A→B propagation delay | 2.8 ns (typ), ≤5 ns (max) - meets timing budgets for high-speed address/data strobing on GTL buses. |
| B→A propagation delay | 4.9 ns (typ), ≤8 ns (max) - accommodates GTL receiver sampling window constraints in bidirectional mode. |
| ESD protection | 2000 V HBM, 200 V MM, 1000 V CDM - exceeds JEDEC standards for robustness in automated assembly and field operation. |
Pinout & Package
TSSOP8 (SOT505-1) package: plastic thin shrink small outline, 8-lead, 3 mm body width, 0.65 mm pitch, lead-free compatible.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | LVTTL data I/O (Port A) | Bi-directional signal path for LVTTL-side bit 0; driven or sampled depending on DIR state. |
| A1 | LVTTL data I/O (Port A) | Bi-directional signal path for LVTTL-side bit 1; shares same direction control as A0. |
| DIR | Direction control input | LVTTL-compatible control signal: HIGH = A→B translation; LOW = B→A sampling. |
| GND | Ground reference | 0 V return for all internal circuitry; must be low-impedance connection to minimize noise coupling. |
| B1 | GTL data I/O (Port B) | Bi-directional GTL-side signal for bit 1; referenced to VREF and terminated at VTT. |
| B0 | GTL data I/O (Port B) | Bi-directional GTL-side signal for bit 0; electrically identical to B1, sharing VREF and VTT. |
| VREF | GTL reference voltage input | Analog input setting GTL switching threshold; externally biased to 0.6 V (GTL−), 0.8 V (GTL), or 1.0 V (GTL+). |
| VCC | Positive supply | 3.0–3.6 V power rail for internal logic and LVTTL output drivers; decoupling capacitor required near pin. |
Key Features
| Feature | Design Value |
|---|---|
| Configurable translation direction | Single DIR pin selects LVTTL→GTL drive or GTL→LVTTL sampling - eliminates need for separate transmit/receive ICs. |
| 5.5 V-tolerant LVTTL inputs | Enables interoperability with 5 V legacy logic without external level shifters or voltage translators. |
| GTL I/O 3.6 V tolerance | Supports full GTL family (GTL−/GTL/GTL+) under varying VTT conditions (0.9 V to 1.5 V) without damage. |
| Adjustable VREF (0.5 V to 0.5VCC) | Allows precise threshold alignment to GTL variants via single external resistor divider - no trimming required. |
| Partial power-down capability | Permits selective disable of unused ports to reduce quiescent current during low-power system states. |
Applications
| Backplane Bus Interface | Server Memory Subsystem |
|---|---|
|
Use Scenario: Interfacing 3.3 V CPU address/data lines to GTL+ backplane traces operating at 1.5 V VTT. IC Role / Device Role / Timing Role: Bidirectional voltage translator ensuring setup/hold compliance for GTL+ clocked receivers. Use Value: Eliminates discrete resistor networks and reduces trace skew by integrating matched A/B path delays (≤5 ns A→B, ≤8 ns B→A). |
Use Scenario: Connecting LVTTL-configured memory controller outputs to GTL-terminated DIMM slots in enterprise servers. IC Role / Device Role / Timing Role: Level-shifting transceiver enabling reliable command/address transmission across GTL− (0.9 V) bus. Use Value: 5.5 V-tolerant A-side inputs accept marginally overdriven control signals; VREF set to 0.6 V matches GTL− threshold. |
| Workstation Chipset Link | Industrial Control Backplane |
|
Use Scenario: Bridging LVTTL GPIOs from a chipset to a GTL-based expansion bus in high-end workstations. IC Role / Device Role / Timing Role: Direction-controlled translator supporting hot-plug-aware bidirectional signaling. Use Value: DIR pin synchronized with bus arbitration logic ensures glitch-free direction switching without metastability. |
Use Scenario: Enabling communication between 3.3 V FPGA I/O banks and legacy GTL instrumentation bus in factory automation systems. IC Role / Device Role / Timing Role: Robust interface IC with 2000 V HBM ESD rating for harsh industrial environments. Use Value: Latch-up immunity >500 mA and wide ambient range (−40 °C to +85 °C) ensure reliability in uncontrolled thermal conditions. |
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 |
|---|---|---|---|
| NXP GTL2002DP,118 | 1-bit version; identical VCC range, VREF adjustability, and GTL tolerance but half the channel count. | Suitable only for single-signal translation; requires two units for 2-bit bus use - increases PCB area and BOM count. | Select when only one signal line needs bridging and space constraints favor minimal footprint over integration. |
| Texas Instruments SN74GTL2002PW | Pin-compatible TSSOP8; same 2-bit function, 5.5 V-tolerant inputs, and GTL I/O tolerance, but fixed VREF = 0.8 V (GTL only). | Cannot support GTL− or GTL+ standards without external biasing; lacks adjustable VREF flexibility of GTL2012DP,118. | Choose when system uses only standard GTL (1.2 V VTT) and cost sensitivity outweighs configurability needs. |
Compared with GTL2012DP,118, GTL2002DP,118 halves channel density and increases component count for multi-bit buses, while SN74GTL2002PW sacrifices VREF adjustability - limiting interoperability across GTL variants without redesign.
Availability
GTL2012DP,118 is available at Aetrix Electronics and suitable for server backplanes, workstation chipsets, industrial control backplanes, and memory subsystems requiring stable component supply and long-term obsolescence management.
Supply support for GTL2012DP,118 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
NXP Semiconductors is a global semiconductor company headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and communications markets.
The GTL2012DP,118 belongs to NXP's GTL-family of bus interface transceivers, engineered specifically for high-speed, low-skew voltage translation between LVTTL and GTL domains in computing infrastructure.
FAQ
What is the maximum allowable VTT voltage for GTL2012DP,118 when operating in GTL+ mode?
The GTL2012DP,118 supports GTL+ with VTT = 1.5 V (typical), and its B-port output voltage rating extends to 3.6 V. Per Table 6, VTT max is 1.65 V for GTL+, and the device maintains specified VOL and VOH performance within that range. Exceeding 1.65 V violates recommended operating conditions and risks parametric degradation. Always verify VTT stability under load using the 25 Ω termination shown in Figure 7.
Can GTL2012DP,118 operate with VCC = 3.0 V while maintaining full 5.5 V input tolerance on the A port?
Yes - the GTL2012DP,118 retains 5.5 V tolerance on A0/A1 inputs across the full 3.0 V to 3.6 V VCC range, as confirmed in Table 5 (VI max = +7.0 V for A port) and Table 6 (VI max = 5.5 V for "except B port"). This tolerance is process-derived and independent of VCC level, enabling robust interfacing even at minimum supply.
How is VREF configured for GTL− operation, and what is the resulting switching threshold?
For GTL− mode, VREF must be set to 0.6 V (per Table 6). This is achieved using an external resistor divider from VCC to GND, with the tap connected to the VREF pin. The resulting GTL− switching threshold is VREF ±0.050 V (0.55 V to 0.65 V), ensuring compatibility with GTL− receivers operating at VTT = 0.9 V.
Does GTL2012DP,118 support hot-swapping or live insertion into a powered GTL bus?
The GTL2012DP,118 is not rated for hot-swap operation. Its absolute maximum ratings do not specify current limits during partial power-up, and the DIR pin has no power-on reset behavior. Applying VCC after VTT or VREF may cause undefined states or excessive current flow. System-level hot-swap requires external sequencing circuitry and is not guaranteed by the GTL2012DP,118 specification.
What is the thermal resistance (θJA) of the GTL2012DP,118 in its TSSOP8 package?
The GTL2012DP,118 datasheet does not publish θJA. However, based on NXP's SOT505-1 package characterization for similar 8-lead TSSOP devices, typical θJA is ~180 °C/W on 1-layer 1-oz copper. For thermal design, assume maximum junction temperature of 150 °C (Table 5) and calculate worst-case power dissipation using ICC = 10 mA (max) and IOL/IOH values from Table 7.
GTL2012DP,118 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Translator Type:
- Mixed Signal
- Channel Type:
- Bidirectional
- Number of Circuits:
- 1
- Channels per Circuit:
- 2
- Voltage - VCCA:
- -
- Voltage - VCCB:
- -
- Input Signal:
- LVTTL
- Output Signal:
- GTL
- Output Type:
- Non-Inverted
- Data Rate:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Features:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
GTL2012DP,118 FAQ
1.How can I place an order for GTL2012DP,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for GTL2012DP,118 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 GTL2012DP,118 reliable?
The price and inventory of GTL2012DP,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for GTL2012DP,118 is usually 5 days.
3.What payment methods are accepted for GTL2012DP,118?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for GTL2012DP,118 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for GTL2012DP,118?
GTL2012DP,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your GTL2012DP,118 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 GTL2012DP,118?
For technical support, including GTL2012DP,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your GTL2012DP,118 requirements.
6.How does Aetrix verify that GTL2012DP,118 is sourced from the original manufacturer or authorized distributors?
All GTL2012DP,118 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 GTL2012DP,118 meets industry standards.
7.What is the process for return or replacement of GTL2012DP,118?
All GTL2012DP,118 units undergo pre-shipment inspection (PSI). If there is an issue with GTL2012DP,118, 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 GTL2012DP,118 part is unused and in its original packaging.
Return procedure for GTL2012DP,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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