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NXP Semiconductors GTL2012DC,125
- Part No.:
- GTL2012DC,125
- Manufacturer:
- NXP Semiconductors
- Category:
- Translators, Level Shifters
- Package:
- Datasheet:
-
GTL2012DC,125.pdf
- Description:
- IC TRANSLTR BIDIRECTIONAL 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,194
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Product details
Overview
GTL2012DC,125 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 configurable direction control via DIR pin, tolerates 5.5 V on LVTTL inputs, and operates with adjustable VREF (0.5 V to 0.5×VCC) for GTL bus compatibility - used in high-speed backplane and motherboard address/data bus translation.
For engineers reviewing the GTL2012DC,125 datasheet, GTL2012DC,125 pinout, GTL2012DC,125 application, or GTL2012DC,125 equivalent, key selection criteria include 5 V-tolerant LVTTL inputs, GTL-side 3.6 V tolerance, sub-8 ns propagation delays (An↔Bn), partial power-down capability, and VSSOP8 package suitability for space-constrained PCB layouts.
Technical Context
The GTL2012DC,125 implements dual-channel bidirectional level translation using separate A-side (LVTTL) and B-side (GTL) I/O structures. Direction is controlled by a single LVTTL-compatible DIR input, selecting either LVTTL-to-GTL drive or GTL-to-LVTTL sampling mode per channel.
Its GTL interface supports three GTL variants (GTL−, GTL, GTL+) via programmable VREF (0.6 V to 1.0 V) and VTT (0.9 V to 1.65 V), while maintaining 3.6 V tolerance on B-side pins and 5.5 V tolerance on A-side inputs - critical for mixed-voltage system interconnects with legacy TTL components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC range | 3.0 V to 3.6 V - ensures stable operation across industrial-grade 3.3 V supply tolerances. |
| LVTTL input voltage max | 5.5 V - allows direct connection to 5 V TTL or CMOS without external level-shifting circuitry. |
| GTL-side voltage tolerance | 3.6 V - protects B-side pins against overvoltage during GTL bus transients or termination faults. |
| tPHL / tPLH (An→Bn) | 3.4 ns / 2.8 ns typical - enables >200 MHz data rates on GTL buses with tight timing margins. |
| VREF adjust range | 0.5 V to 0.5×VCC - matches GTL− (0.6 V), GTL (0.8 V), and GTL+ (1.0 V) reference requirements. |
| Input capacitance (control) | 2.5 pF max - minimizes loading on clock or control lines driving DIR and enable signals. |
| ESD rating (HBM) | 2000 V - meets JEDEC JESD22-A114 for robust handling in automated assembly environments. |
Pinout & Package
VSSOP8 package: plastic very thin shrink small outline, 8-lead, 2.3 mm body width, 0.5 mm pitch - optimized for high-density routing and thermal performance in compact computing modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | LVTTL data I/O (channel 0) | Bidirectional A-side terminal; 5.5 V tolerant when input, drives LVTTL levels when output. |
| A1 | LVTTL data I/O (channel 1) | Second LVTTL channel with identical voltage tolerance and drive strength as A0. |
| DIR | Direction control input | LVTTL-compatible logic input: HIGH enables A→B translation; LOW enables B→A sampling. |
| GND | Ground reference | 0 V return path for both LVTTL and GTL domains; must be low-impedance for signal integrity. |
| B1 | GTL data I/O (channel 1) | B-side terminal compliant with GTL−/GTL/GTL+ standards; 3.6 V tolerant, referenced to VREF/VTT. |
| B0 | GTL data I/O (channel 0) | Primary GTL bus interface channel with matched impedance and slew rate to GTL specifications. |
| VREF | GTL reference voltage input | Analog input setting GTL switching threshold; externally biased to 0.6–1.0 V depending on GTL variant. |
| VCC | Positive supply | 3.0–3.6 V power rail for internal logic and LVTTL output drivers; decoupling required near pin. |
Key Features
| Feature | Design Value |
|---|---|
| Configurable translation direction | Single DIR pin selects real-time LVTTL→GTL drive or GTL→LVTTL sampling per channel - eliminates need for separate transmit/receive ICs. |
| 5 V tolerant LVTTL inputs | Supports direct interfacing with legacy 5 V TTL/CMOS logic without external resistors or translators - reduces BOM count and layout area. |
| Adjustable VREF (0.5 V to 0.5×VCC) | Enables hardware-selectable compatibility with GTL− (0.6 V), GTL (0.8 V), and GTL+ (1.0 V) buses - one device supports multiple GTL standards. |
| Partial power-down capability | Allows disabling of unused channels or sections while retaining bias on active paths - lowers quiescent current in multi-channel systems. |
| Latch-up immunity & ESD protection | Exceeds 500 mA latch-up (JESD78) and 2000 V HBM (JESD22-A114) - ensures reliability in hot-plug and noisy industrial environments. |
Applications
| Backplane Address Bus Translation | Server Memory Controller Interface |
|---|---|
Use Scenario: Translating address signals between a 3.3 V LVTTL memory controller and a GTL+ backplane operating at 1.5 V VTT. IC Role / Device Role / Timing Role: Bidirectional level translator synchronizing control/address traffic across voltage domains with <8 ns propagation delay. Use Value: Eliminates timing skew between LVTTL and GTL domains while supporting 200+ MHz bus speeds without external termination tuning. |
Use Scenario: Interfacing a 3.3 V CPU northbridge to GTL−-based RDRAM or DDR SDRAM command/address buses. IC Role / Device Role / Timing Role: Direction-controlled transceiver managing write-enable, chip-select, and bank-address signals with precise VREF = 0.6 V alignment. Use Value: Maintains signal integrity under high fan-out loads while enabling seamless integration with legacy GTL− infrastructure. |
| Industrial PLC I/O Module Backplane | Test Equipment Signal Conditioning |
Use Scenario: Isolating and translating control signals between 3.3 V microcontroller peripherals and GTL-bus-based modular I/O expansion racks. IC Role / Device Role / Timing Role: Robust voltage translator providing 5.5 V-tolerant inputs for field-wire noise immunity and GTL-side transient protection. Use Value: Reduces system-level ESD filtering requirements and extends operational life in electrically harsh factory-floor environments. |
Use Scenario: Conditioning high-speed digital stimulus/response signals between LVTTL-pattern generators and GTL-bus test fixtures. IC Role / Device Role / Timing Role: Precision-delay transceiver ensuring deterministic setup/hold timing for automated test equipment synchronization. Use Value: Enables sub-nanosecond jitter margin compliance in ATE applications requiring repeatable edge placement accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional level translation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NXP GTL2002DC,125 | 1-bit version; identical VSSOP8 package, same VREF adjust range and 5.5 V LVTTL tolerance. | Suitable only for single-line translation; lacks channel density for dual-signal buses like address/data pairs. | Select when space or cost constraints require minimal channel count and full GTL compatibility is retained. |
| Texas Instruments SN74GTLP2201DCTR | 3.3 V-only GTL+ transceiver; no 5 V LVTTL tolerance; fixed 1.0 V VREF; higher ICC (12 mA typical). | Restricted to GTL+ systems with clean 3.3 V LVTTL sources; not interoperable with 5 V TTL or GTL−/GTL variants. | Choose only if existing design uses exclusively GTL+ and requires TI-qualified supply chain; verify VREF sourcing compatibility. |
Compared with GTL2012DC,125, the GTL2002DC,125 reduces channel count but preserves full voltage flexibility, while the SN74GTLP2201DCTR sacrifices 5 V tolerance and VREF adjustability for tighter GTL+ timing - making GTL2012DC,125 the sole option supporting mixed-voltage, multi-standard GTL translation in a single VSSOP8 device.
Availability
GTL2012DC,125 is available at Aetrix Electronics and suitable for high-speed backplane interfaces, server memory subsystems, industrial PLC backplanes, and automated test equipment requiring stable component supply and long-term obsolescence management.
Supply support for GTL2012DC,125 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 communication markets.
The GTL2012DC,125 belongs to NXP's legacy GTL interface product line, designed specifically for bridging 3.3 V LVTTL logic with high-speed GTL−/GTL/GTL+ backplane and memory bus architectures in enterprise and industrial computing platforms.
FAQ
What is the maximum input voltage rating for the LVTTL side of the GTL2012DC,125?
The GTL2012DC,125 supports up to 5.5 V on its A-side (A0, A1, DIR) LVTTL inputs, enabling direct interfacing with 5 V TTL or CMOS logic without external clamping or level-shifting components. This specification is confirmed in Table 5 (Limiting Values) and Section 1 (General Description) of the NXP GTL2012DC,125 datasheet, and applies regardless of VCC state.
Does the GTL2012DC,125 support GTL−, GTL, and GTL+ standards simultaneously?
The GTL2012DC,125 does not operate across all three GTL standards simultaneously, but supports each individually via external VREF and VTT configuration: VREF = 0.6 V / VTT = 0.9 V for GTL−, VREF = 0.8 V / VTT = 1.2 V for GTL, and VREF = 1.0 V / VTT = 1.5 V for GTL+. The GTL2012DC,125 datasheet Table 6 explicitly lists these triple-mode operating conditions.
What is the propagation delay asymmetry between A→B and B→A directions in the GTL2012DC,125?
The GTL2012DC,125 exhibits directional delay asymmetry: An→Bn propagation is faster (tPLH/tPHL typ. 2.8/3.4 ns) than Bn→An (tPLH/tPHL typ. 5.2/4.9 ns), due to differing driver strengths and GTL bus loading characteristics. These values are measured per Figure 4 and Figure 5 in the GTL2012DC,125 datasheet under GTL conditions (VREF = 0.8 V, VTT = 1.2 V).
Can the GTL2012DC,125 operate with VCC = 3.0 V while maintaining full GTL+ compatibility?
Yes - the GTL2012DC,125 maintains full GTL+ compatibility at VCC = 3.0 V, as confirmed by Table 6 (Recommended Operating Conditions), which specifies VREF = 1.0 V and VTT = 1.5 V as valid for GTL+ operation across the entire 3.0–3.6 V VCC range. Output drive strength and timing remain within spec per Table 7 and Table 8 at 3.0 V.
Is the VSSOP8 package of the GTL2012DC,125 RoHS-compliant and lead-free solder compatible?
Yes - the GTL2012DC,125 in VSSOP8 (SOT765-1) package is RoHS-compliant and qualified for lead-free reflow soldering per J-STD-020C, with a peak reflow temperature of 260 °C (Table 10). Its moisture sensitivity level (MSL) is defined in the NXP GTL2012DC,125 packaging documentation and aligns with standard surface-mount assembly practices.
GTL2012DC,125 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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-VFSOP (0.091", 2.30mm Width)
GTL2012DC,125 FAQ
1.How can I place an order for GTL2012DC,125 through Aetrix?
Please submit a Request for Quotation (RFQ) for GTL2012DC,125 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 GTL2012DC,125 reliable?
The price and inventory of GTL2012DC,125 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for GTL2012DC,125 is usually 5 days.
3.What payment methods are accepted for GTL2012DC,125?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for GTL2012DC,125 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for GTL2012DC,125?
GTL2012DC,125 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your GTL2012DC,125 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 GTL2012DC,125?
For technical support, including GTL2012DC,125 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your GTL2012DC,125 requirements.
6.How does Aetrix verify that GTL2012DC,125 is sourced from the original manufacturer or authorized distributors?
All GTL2012DC,125 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 GTL2012DC,125 meets industry standards.
7.What is the process for return or replacement of GTL2012DC,125?
All GTL2012DC,125 units undergo pre-shipment inspection (PSI). If there is an issue with GTL2012DC,125, 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 GTL2012DC,125 part is unused and in its original packaging.
Return procedure for GTL2012DC,125:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
GTL2012DC,125 Tags
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