NXP Semiconductors GTL2018PW/Q900,118

Overview

GTL2018PW/Q900 from NXP Semiconductors is an octal translating transceiver enabling bidirectional voltage-level translation between 3.3 V LVTTL and GTL/GTL+/GTL− bus systems. It features DIR-controlled directionality, 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. Used in high-speed backplane and motherboard interfaces requiring signal integrity across mixed-voltage domains.

For engineers reviewing the GTL2018PW/Q900 datasheet, GTL2018PW/Q900 pinout, GTL2018PW/Q900 application, or GTL2018PW/Q900 equivalent, this page delivers verified electrical parameters, AEC-Q100 compliance status, TSSOP24 package mapping, propagation delay values per GTL variant, and validated alternative options for LVTTL-to-GTL interface design.

Technical Context

The GTL2018PW/Q900 implements dual-port bidirectional translation using a DIR-controlled enable architecture: when DIR = HIGH, A-side LVTTL signals drive B-side GTL outputs; when DIR = LOW, B-side GTL signals drive A-side LVTTL outputs. Its GTL I/Os tolerate up to 3.6 V, while LVTTL inputs withstand 5.5 V-enabling direct interfacing with legacy TTL/5 V CMOS logic without level-shifting circuitry.

It supports three GTL standards (GTL−, GTL, GTL+) via programmable VREF and VTT, with specified propagation delays of 2.8–5.3 ns (A→B) and 4.7–5.3 ns (B→A) depending on configuration. Partial power-down capability and latch-up protection exceeding 100 mA per JESD78 ensure robust operation in industrial and automotive-qualified environments.

Key Specifications

Pinout & Package

TSSOP24 package (SOT355-1), plastic thin shrink small outline, 24-lead, body width 4.4 mm, lead pitch 0.65 mm.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar LVTTL-to-GTL interface applications.

Compared with GTL2018PW/Q900, the GTL2002PW offers reduced channel count and no automotive qualification, while the SN74GTL16212DGGR provides double the width but requires PCB redesign-making GTL2018PW/Q900 optimal for AEC-Q100-compliant 8-bit GTL interface consolidation.

Availability

GTL2018PW/Q900 is available at Aetrix Electronics and suitable for high-speed backplane interfaces, automotive domain controllers, industrial PLC I/O modules, and telecom line card designs requiring stable component supply and long-term lifecycle assurance.

Supply support for GTL2018PW/Q900 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 IoT applications.

The GTL2018PW/Q900 belongs to NXP's GTL family of high-speed interface transceivers, designed specifically to bridge legacy GTL bus architectures with modern 3.3 V LVTTL logic in mission-critical embedded systems.

FAQ

What is the AEC-Q100 qualification status of GTL2018PW/Q900?

GTL2018PW/Q900 is AEC-Q100 qualified per Grade 3 (−40 °C to +85 °C ambient). Documentation including PPAP files is available upon request via [email protected]. This qualification confirms reliability for automotive infotainment and body control module applications where GTL bus interfacing is required. The GTL2018PW/Q900 meets stress testing requirements for temperature cycling, humidity bias, and ESD per AEC-Q100 Rev H.

How does the DIR pin control signal flow direction in GTL2018PW/Q900?

In GTL2018PW/Q900, the DIR pin is an active-HIGH LVTTL input: when DIR = HIGH, signals pass from A-side (LVTTL) to B-side (GTL); when DIR = LOW, signals pass from B-side (GTL) to A-side (LVTTL). This enables single-wire control of bidirectional data flow without external logic. The GTL2018PW/Q900 function table explicitly defines these states, and propagation delays differ slightly between directions-2.8 ns (A→B) vs 4.7 ns (B→A) under GTL+ conditions.

What are the recommended VREF and VTT settings for GTL+ operation with GTL2018PW/Q900?

For GTL+ operation, GTL2018PW/Q900 requires VREF = 1.0 V and VTT = 1.5 V. These values are specified in Table 6 of the datasheet and align with GTL+ standard thresholds. VREF must be externally generated and stable within ±2% to maintain valid input switching margins. VTT is supplied to the GTL bus termination network and must be decoupled locally near the GTL2018PW/Q900 B-port pins to minimize noise-induced timing jitter.

Can GTL2018PW/Q900 interface directly with 5 V TTL logic without external components?

Yes-GTL2018PW/Q900 LVTTL inputs (A0–A7) tolerate up to 5.5 V, allowing direct connection to standard 5 V TTL outputs. No series resistors or clamping diodes are needed. However, outputs on the A-side remain 3.3 V LVTTL-compliant and cannot drive 5 V loads directly. This makes GTL2018PW/Q900 ideal for receiving 5 V signals into a 3.3 V system while maintaining clean GTL-side output levels.

What package type and dimensions does GTL2018PW/Q900 use?

GTL2018PW/Q900 uses the TSSOP24 package (SOT355-1): 24-lead plastic thin shrink small outline, 4.4 mm body width, 0.65 mm lead pitch, and maximum height of 1.1 mm. Pin 1 index is marked on the top surface, and the package complies with JEDEC MO-153. This compact, surface-mount package supports automated reflow assembly and is optimized for high-density PCB layouts in space-constrained applications like automotive ECUs and telecom modules.