NXP Semiconductors PX1012A-EL1/G,551

Overview

PX1012A-EL1/G from NXP Semiconductors (formerly Philips) is a single-lane, 2.5 Gbit/s PCI Express 1.1-compliant stand-alone physical layer (PHY) IC. It implements full SerDes functionality with 8b/10b encoding, clock and data recovery (CDR), elastic buffer, receiver detection, and loopback-designed for FPGA-to-PCIe interconnect in embedded computing and industrial control systems.

For engineers reviewing the PX1012A-EL1/G datasheet, PX1012A-EL1/G pinout, PX1012A-EL1/G application, or PX1012A-EL1/G equivalent, key selection criteria include its LFBGA81 package, SSTL_2 250 MHz PXPIPE interface, 100 MHz ±300 ppm reference clock support, industrial temperature range (−40 °C to +85 °C), and compliance with PCIe Base Spec 1.1.

Technical Context

The PX1012A-EL1/G integrates a full PCIe 1.1 PHY stack: CDR-based serial link recovery at 2.5 Gbit/s, 8-bit parallel PXPIPE interface with source-synchronous TXCLK/RXCLK, and hardware-accelerated 8b/10b encode/decode. Its elastic buffer compensates for ±600 ppm clock tolerance via SKP symbol insertion/removal, signaled through RXSTATUS.

Power management supports P0, P0s, and P1 states with dedicated PWRDWN[1:0] inputs and PHYSTATUS status reporting. JTAG (IEEE 1149.1) enables boundary scan and BIST of SerDes and I/O blocks at speed using 3.3 V CMOS signaling.

Key Specifications

Pinout & Package

LFBGA81 package (9 × 9 × 1.05 mm, SOT643-1); Pb-free SnAgCu solder ball compound; 81-ball fine-pitch array with standard ball grid layout.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar PCIe Gen1 PHY applications.

Compared with IDT8N3SV772 and TSB12LV26, the PX1012A-EL1/G delivers full PCIe 1.1 compliance with hardware-managed clock tolerance, industrial temperature qualification, and integrated JTAG BIST-reducing FPGA resource usage and system-level validation effort.

Availability

PX1012A-EL1/G is available at Aetrix Electronics and suitable for industrial PLC backplanes, FPGA-based PCIe endpoint bridges, and embedded computing module expansion requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for PX1012A-EL1/G 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 leader focused on secure connectivity solutions for automotive, industrial, and IoT applications.

The PX1012A-EL1/G belongs to NXP's legacy high-speed interface product line, designed specifically to enable FPGA- and ASIC-based PCIe Gen1 implementations in ruggedized industrial environments.

FAQ

What is the operating temperature range for the PX1012A-EL1/G?

The PX1012A-EL1/G is rated for industrial temperature operation from −40 °C to +85 °C. This specification is confirmed in the official Philips/NXP product data sheet (Rev. 02, May 2006), Table 1 and Ordering Information section. The "I" suffix in related part numbers (e.g., PX1012AI-EL1/G) explicitly denotes industrial grade, and PX1012A-EL1/G shares identical thermal qualification per package marking documentation.

Does the PX1012A-EL1/G support PCIe Gen2 or higher data rates?

No, the PX1012A-EL1/G supports only PCIe Gen1 at 2.5 Gbit/s. The datasheet explicitly states compliance with PCIe Base Specification Rev. 1.0a and Rev. 1.1, and all performance parameters-including CDR bandwidth, SerDes architecture, and timing margins-are specified for 2.5 Gbit/s operation. It does not meet the electrical or protocol requirements for 5.0 Gbit/s (Gen2) or beyond.

How does the PX1012A-EL1/G handle clock tolerance between link partners?

The PX1012A-EL1/G uses an elastic buffer with automatic SKP symbol insertion/removal to compensate for up to ±600 ppm frequency mismatch. As documented in Section 8.9, the PHY monitors the receive stream and signals SKP adjustments via RXSTATUS[2:0] during the COM symbol clock cycle-enabling the MAC to maintain data alignment without external FIFO management.

Is the PX1012A-EL1/G pin-compatible with the PX1011A-EL1/G?

Yes, the PX1012A-EL1/G and PX1011A-EL1/G share identical LFBGA81 pinout, power supply assignments, and signal definitions per Figures 2–3 and Tables 5–12 in the datasheet. Both devices use the same SOT643-1 package and ball mapping; functional differences (e.g., internal configuration) do not affect mechanical or electrical pin compatibility.

What reference voltage is required for the SSTL_2 interface on the PX1012A-EL1/G?

The PX1012A-EL1/G requires a 1.25 V reference voltage applied to the VREFS pin (J2), as specified in Table 10 of the datasheet. This voltage sets the switching threshold for all SSTL_2 I/O signals including TXDATA[7:0], RXDATA[7:0], and control/status lines-ensuring correct logic levels when interfacing with FPGA banks configured for SSTL_2 Class I.