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NXP Semiconductors GTL2018PW,118
- Part No.:
- GTL2018PW,118
- Manufacturer:
- NXP Semiconductors
- Category:
- Translators, Level Shifters
- Package:
- Datasheet:
-
GTL2018PW,118.pdf
- Description:
- IC TRANSLATOR BIDIR 24TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,444
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Product details
Overview
GTL2018PW,118 from NXP Semiconductors is an octal translating transceiver enabling bidirectional voltage-level translation between 3.3 V LVTTL systems and GTL−/GTL/GTL+ buses. It functions as either a GTL-to-LVTTL sampling receiver or LVTTL-to-GTL driver, 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 supply. It is used in high-speed bus interface applications such as CPU-to-cache or chipset-to-memory interconnects.
For engineers reviewing the GTL2018PW,118 datasheet, GTL2018PW,118 pinout, GTL2018PW,118 application, or GTL2018PW,118 equivalent, key selection considerations include bidirectional direction control via DIR pin, GTL-side 3.6 V tolerance, propagation delays under 8 ns (B→A), 5 V-tolerant A-side inputs, and TSSOP24 package compatibility with dense PCB layouts.
Technical Context
The GTL2018PW,118 implements dual-voltage domain translation using separate A-side (LVTTL) and B-side (GTL) I/O structures, with direction controlled by a single TTL-compatible DIR input. Its internal architecture supports partial power-down and includes clamp diodes for robust ESD and overvoltage protection on both sides.
It supports three GTL variants-GTL− (VTT = 0.9 V), GTL (VTT = 1.2 V), and GTL+ (VTT = 1.5 V)-with corresponding VREF settings (0.6 V, 0.8 V, and 1.0 V). Propagation delay asymmetry is intentional: An→Bn paths are faster (≤5 ns typ) than Bn→An paths (≤8 ns typ), reflecting optimized sampling-receiver behavior on the GTL side.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 3.0 V to 3.6 V - ensures compatibility with standard 3.3 V LVTTL logic rails while maintaining noise margin |
| LVTTL Input Tolerance | Up to 5.5 V - allows direct interfacing with legacy 5 V TTL or CMOS without level-shifting circuitry |
| GTL I/O Tolerance | 3.6 V - protects B-side pins against overvoltage during GTL bus termination or hot-swap events |
| VREF Range | 0.5 V to 0.5VCC - enables precise threshold setting for GTL signaling across all three GTL variants |
| Propagation Delay (An→Bn) | 2.8 ns to 5 ns typ - supports >200 MHz data rates on LVTTL-to-GTL paths with minimal timing skew |
| Propagation Delay (Bn→An) | 4.7 ns to 8 ns typ - optimized for reliable sampling of GTL bus signals into LVTTL domain |
| ESD Protection | 2000 V HBM / 1000 V CDM - meets industrial-grade reliability requirements per JESD22 standards |
| Latch-up Immunity | >100 mA per JESD78 - prevents destructive latch-up during transient overcurrent events |
Pinout & Package
TSSOP24 package (SOT355-1), plastic thin shrink small outline, 24-pin, body width 4.4 mm, lead pitch 0.65 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (pins 1, 7, 12, 19) | Ground reference | Four dedicated ground connections reduce ground bounce and improve signal integrity across 8-bit bus |
| VCC (pins 14, 24) | Positive supply | Dual VCC pins minimize supply impedance and support stable operation at high switching frequencies |
| A0–A7 (pins 15, 16, 17, 18, 20, 21, 22, 23) | LVTTL I/O port | 8-bit bidirectional LVTTL interface; inputs tolerate up to 5.5 V when configured as inputs (DIR = HIGH) |
| B0–B7 (pins 2, 3, 4, 5, 8, 9, 10, 11) | GTL I/O port | 8-bit GTL−/GTL/GTL+ interface; outputs drive terminated GTL bus with 40 mA sink capability |
| VREF (pin 6) | Reference voltage input | Adjustable threshold for GTL input receivers; sets switching point relative to VTT for noise-immune detection |
| DIR (pin 13) | Direction control | TTL-compatible input that selects data flow direction: HIGH = A→B (LVTTL→GTL), LOW = B→A (GTL→LVTTL) |
Key Features
| Feature | Design Value |
|---|---|
| Octal bidirectional translation | Enables full 8-bit parallel interface between mismatched LVTTL and GTL voltage domains without external logic |
| 5 V-tolerant LVTTL inputs | Eliminates need for external clamping or level-shifters when connecting to 5 V legacy logic or microcontrollers |
| Adjustable VREF (0.5 V to 0.5VCC) | Allows precise matching to GTL−, GTL, or GTL+ bus standards by setting optimal input threshold for each variant |
| Partial power-down capability | Permits selective disablement of unused sections to reduce system-level quiescent current without affecting active channels |
| GTL-side 3.6 V tolerance | Protects B-port pins against overvoltage during GTL bus initialization, termination faults, or hot-plug scenarios |
| AEC-Q100 compliance option | GTL2018PW/Q900 variant qualified for automotive applications; standard GTL2018PW,118 is industrial-grade |
Applications
| High-Speed CPU Cache Interface | Chipset-to-Memory Bus Bridge |
|---|---|
Use Scenario: Interfacing a 3.3 V LVTTL CPU address/data bus to a GTL+ cache subsystem operating at 1.5 V VTT. IC Role / Device Role / Timing Role: GTL2018PW,118 acts as a directional translator, converting CPU LVTTL outputs to GTL+ signals for cache access and sampling GTL+ responses back into LVTTL for CPU input. Use Value: Enables sub-5 ns LVTTL→GTL+ propagation with guaranteed setup/hold margins at >200 MHz clock rates, eliminating timing-critical discrete resistor networks. | Use Scenario: Connecting a northbridge chipset's LVTTL control bus to a GTL-based memory controller with VTT = 1.2 V. IC Role / Device Role / Timing Role: GTL2018PW,118 serves as a bidirectional bus transceiver, driving GTL signals onto the memory bus and receiving GTL status/control responses. Use Value: Provides 40 mA GTL sink current and 5.5 V-tolerant LVTTL inputs, allowing direct integration without additional buffering or voltage translation ICs. |
| Backplane Data Link Interface | Test Equipment Signal Conditioning |
Use Scenario: Level-shifting between LVTTL test logic and GTL− backplane signaling (VTT = 0.9 V) in modular instrumentation racks. IC Role / Device Role / Timing Role: GTL2018PW,118 operates as a sampling receiver on the GTL− side, capturing backplane data and presenting it as clean LVTTL signals to FPGA-based controllers. Use Value: Leverages low 3.4 pF B-port capacitance and 5.3 ns B→A tPLH to maintain signal fidelity across long traces with minimal added jitter. | Use Scenario: Adapting legacy 5 V TTL test fixtures to modern GTL-based DUTs in automated test equipment (ATE). IC Role / Device Role / Timing Role: GTL2018PW,118 functions as an LVTTL-to-GTL driver, accepting 5 V-tolerant control signals from fixture logic and generating compliant GTL outputs. Use Value: Eliminates need for discrete level shifters or custom ASICs, reducing fixture redesign time and improving test repeatability across multiple DUT families. |
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 GTL2000PW,118 | 4-bit version, identical electrical specs and pinout per channel, smaller TSSOP14 package | Suitable only for 4-bit interfaces; lacks 8-bit bus width required for full cache or memory links | Select GTL2000PW,118 only when space-constrained designs require half-width translation with identical performance per lane. |
| Texas Instruments SN74GTL16612DGGR | 16-bit, 3.3 V-only LVTTL side, no 5 V tolerance; requires external VREF generation | Designed for high-density memory modules where 5 V legacy compatibility is unnecessary | Choose SN74GTL16612DGGR for new 3.3 V-only systems needing wider bus width; avoid if interfacing to 5 V logic or requiring VREF flexibility. |
Compared with GTL2018PW,118, GTL2000PW,118 offers identical per-lane performance in a smaller footprint but halves bus capacity, while SN74GTL16612DGGR scales bus width at the cost of losing 5 V tolerance and integrated VREF adjustability-making GTL2018PW,118 the optimal choice for mixed-voltage, 8-bit, high-reliability interconnects.
Availability
GTL2018PW,118 is available at Aetrix Electronics and suitable for high-speed CPU cache interfaces, chipset-to-memory bridges, backplane data links, and test equipment signal conditioning requiring stable component supply and long-term industrial lifecycle support.
Supply support for GTL2018PW,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 consumer applications.
The GTL2018PW,118 belongs to NXP's high-speed interface transceiver product line, designed specifically to solve voltage-domain bridging challenges in legacy and emerging GTL-based computing architectures.
FAQ
What is the maximum allowable VTT voltage for GTL2018PW,118 when operating in GTL mode?
The GTL2018PW,118 supports VTT up to 3.6 V on the B port, but the recommended operating condition for GTL mode is VTT = 1.14 V to 1.26 V. Exceeding 3.6 V violates absolute maximum ratings and risks permanent damage. For reliable GTL operation, maintain VTT within the 1.2 V ±6% range and size termination resistors to limit IOL to ≤40 mA per B-port pin.
Can GTL2018PW,118 be used with 5 V microcontrollers directly connected to its A-side inputs?
Yes, GTL2018PW,118 supports direct connection of 5 V microcontrollers to its A-side inputs (A0–A7) when DIR = HIGH (LVTTL-to-GTL mode), as these inputs are rated for up to 5.5 V. However, ensure VCC remains within 3.0 V–3.6 V, and do not apply 5 V to A-side pins when DIR = LOW (GTL-to-LVTTL mode), as output voltage limits then apply.
How does the DIR pin control data direction in GTL2018PW,118?
In GTL2018PW,118, the DIR pin is an active-HIGH control: when DIR = HIGH, data flows from A-side (LVTTL) to B-side (GTL); when DIR = LOW, data flows from B-side (GTL) to A-side (LVTTL). The function table confirms this behavior, and the DIR input is TTL-compatible with VIH ≥2 V and VIL ≤0.8 V referenced to GND.
Is GTL2018PW,118 pin-compatible with GTL2018PW/Q900?
Yes, GTL2018PW,118 and GTL2018PW/Q900 share identical pinout, package (TSSOP24), and electrical specifications. The /Q900 suffix denotes AEC-Q100 qualification for automotive use, while GTL2018PW,118 is rated for industrial temperature range (−40 °C to +85 °C) and is not AEC-Q100 qualified. Both are mechanically and electrically interchangeable in non-automotive designs.
What is the purpose of the VREF pin in GTL2018PW,118 and how should it be configured?
The VREF pin in GTL2018PW,118 sets the input threshold voltage for GTL receivers on the B port. It must be biased between 0.5 V and 0.5VCC (e.g., 0.8 V for standard GTL with VTT = 1.2 V). VREF is typically derived from a resistive divider between VTT and GND or via an active reference; improper VREF setting causes incorrect GTL signal interpretation and timing violations.
GTL2018PW,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:
- 8
- Voltage - VCCA:
- -
- Voltage - VCCB:
- -
- Input Signal:
- LVTTL
- Output Signal:
- GTL
- Output Type:
- Non-Inverted
- Data Rate:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Features:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-TSSOP (0.173", 4.40mm Width)
GTL2018PW,118 FAQ
1.How can I place an order for GTL2018PW,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for GTL2018PW,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 GTL2018PW,118 reliable?
The price and inventory of GTL2018PW,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for GTL2018PW,118 is usually 5 days.
3.What payment methods are accepted for GTL2018PW,118?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for GTL2018PW,118 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for GTL2018PW,118?
GTL2018PW,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your GTL2018PW,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 GTL2018PW,118?
For technical support, including GTL2018PW,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your GTL2018PW,118 requirements.
6.How does Aetrix verify that GTL2018PW,118 is sourced from the original manufacturer or authorized distributors?
All GTL2018PW,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 GTL2018PW,118 meets industry standards.
7.What is the process for return or replacement of GTL2018PW,118?
All GTL2018PW,118 units undergo pre-shipment inspection (PSI). If there is an issue with GTL2018PW,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 GTL2018PW,118 part is unused and in its original packaging.
Return procedure for GTL2018PW,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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