NXP Semiconductors PTN3311DP,118

Overview

PTN3311DP,118 from NXP Semiconductors (formerly Philips) is a high-speed serial logic translator IC that converts PECL-level differential inputs to LVDS-level differential outputs. It operates from a single +3.3 V supply, supports up to 800 Mbps data throughput, and is housed in an 8-pin TSSOP package (SOT505-1). It enables interoperability between optical transceiver modules and ASICs in telecom backplane interfaces.

For engineers reviewing the PTN3311DP,118 datasheet, PTN3311DP,118 pinout, PTN3311DP,118 application, or PTN3311DP,118 equivalent, key selection criteria include its PECL-to-LVDS translation direction, 800 Mbps max data rate, ±50 ps output pulse skew, 350 mV typical differential output voltage, and compatibility with SONET/SDH and ATM systems requiring low-jitter signal integrity.

Technical Context

The PTN3311DP,118 implements a unidirectional, fixed-function PECL-to-LVDS translation path with no internal termination or programmability. Its input stage accepts PECL-compatible differential signals (VIH = 2.135 V min, VIL = 1.825 V max at VCC = 3.3 V), while its LVDS output stage delivers compliant differential swing (VOD = 250–450 mV) into 100 Ω loads.

It features two independent ground pins (GND1, GND2) and dual supply pins (VCC1, VCC2) for noise isolation between input and output domains. Propagation delay is 1–3 ns, and output transition times are 500–650 ps (LOW-to-HIGH and HIGH-to-LOW) under RL = 100 Ω, CL = 5 pF conditions.

Key Specifications

Pinout & Package

PTN3311DP,118 is packaged in an 8-pin plastic thin shrink small outline package (TSSOP8) with 3 mm body width (SOT505-1), optimized for high-density optical module PCB layouts.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-speed differential logic translation applications.

Compared with SN65LVDS31DR and MAX9122ESA+, the PTN3311DP,118 delivers higher throughput (800 Mbps), lower skew (≤50 ps), and native PECL input compliance without external components - making it the optimal choice for telecom optical module interconnects demanding strict jitter and signal integrity control.

Availability

PTN3311DP,118 is available at Aetrix Electronics and suitable for SONET/SDH line cards, ATM switching fabric, and optical transceiver interoperability applications requiring stable component supply and long-term lifecycle support.

Supply support for PTN3311DP,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 formed from the spin-off of Philips Semiconductors in 2006, specializing in secure connectivity solutions for automotive, industrial, and communications markets.

The PTN3311DP,118 belongs to NXP's high-speed interface translator product line, designed specifically to resolve differential signaling incompatibilities between optical transceiver modules and host ASICs in telecom infrastructure.

FAQ

What is the primary function of the PTN3311DP,118?

The PTN3311DP,118 is a dedicated PECL-to-LVDS high-speed serial logic translator IC. It accepts differential PECL input signals (e.g., from optical transceivers) and outputs compliant LVDS signals (e.g., to SerDes or network processors). Unlike general-purpose level shifters, the PTN3311DP,118 is optimized for 800 Mbps operation with guaranteed skew and propagation delay, and requires no configuration or external biasing for PECL input compatibility.

Does the PTN3311DP,118 support bidirectional translation?

No, the PTN3311DP,118 supports unidirectional PECL-to-LVDS translation only. Its internal circuitry is hardwired for this specific direction, as confirmed by the block diagram and pinout in the official datasheet. For LVDS-to-PECL translation, the companion part PTN3310DP,118 must be used. The PTN3311DP,118 does not include internal termination resistors or direction-control logic, and cannot be reconfigured.

What are the supply voltage requirements for stable operation of the PTN3311DP,118?

The PTN3311DP,118 requires a single +3.3 V supply with a recommended operating range of 3.0 V to 3.6 V. It draws 12–20 mA typical supply current. Both VCC1 (input domain) and VCC2 (output domain) must be connected to the same 3.3 V rail unless isolated supplies are used for noise mitigation. Operation outside this range may cause failure to meet AC specifications such as 800 Mbps throughput or ≤50 ps pulse skew.

Can the PTN3311DP,118 be used in place of the PTN3311D in SO8 package?

Yes, the PTN3311DP,118 is the TSSOP8-packaged variant of the same silicon die as the PTN3311D in SO8. Pinout, electrical characteristics, and timing parameters are identical per the Philips/NXP datasheet. The only difference is the package: SOT505-1 (3 mm width) vs. SOT96-1 (3.9 mm width). Layout changes are required due to footprint and soldering profile differences, but no schematic or firmware modifications are needed for functional replacement.

Is the PTN3311DP,118 compliant with industry standards for LVDS and PECL interfaces?

Yes, the PTN3311DP,118 meets both EIA/TIA-644 for LVDS outputs (250–450 mV differential swing, 100 Ω load) and PECL-compatible input thresholds (VIH = 2.135 V min, VIL = 1.825 V max at VCC = 3.3 V). These specifications are explicitly validated in the "DC Electrical Characteristics" and "AC Electrical Characteristics" tables of the official NXP datasheet for PTN3311DP,118, confirming interoperability with standard-compliant PECL sources and LVDS receivers.