Reliable PCI to 1 Serial and 1 Parallel Low Profile Card with 16C950 FIFO – W-952-1S1PL

Reliable Legacy Connectivity for Compact PCI Systems

W-952-1S1PL PCI to 1S/1P Card is a low-profile PCI expansion card designed to add one serial port and one parallel port to compatible desktop computers and industrial systems. It combines 16C950-class UART functionality, deep FIFO data buffering, flexible flow control, and IEEE 1284 EPP parallel-port support in a compact hardware format.

The card is suitable for computers that must continue communicating with established serial equipment, parallel peripherals, industrial controllers, testing instruments, printers, programmers, and other legacy devices. Its low-profile bracket design also makes it suitable for compact computer enclosures where installation space is limited.

Key Specifications of W-952-1S1PL PCI Card

128-Byte FIFO for Efficient Serial Data Management

Each transmitter and receiver includes a 128-byte-deep FIFO, helping the card manage larger amounts of serial data before processor intervention is required. This buffering capability can support smoother data transmission and reduce the risk of interruptions during demanding communication tasks.

Readable FIFO levels, programmable interrupt thresholds, and automatic flow-control thresholds give system integrators greater control over data movement. The serial function also provides Good-Data status and a flexible baud-rate clock prescaler for adapting communication parameters to different connected devices.

Flexible Software and Hardware Flow Control

W-952-1S1PL supports automated in-band flow control through programmable XON/XOFF commands in both communication directions. This allows connected devices to pause and resume data transmission through software-based commands when buffers reach configured levels.

Automated out-of-band flow control is also available through CTS#/RTS# and DSR#/DTR# signals. These hardware flow-control options help maintain reliable communication between devices operating at different speeds while reducing the need for continuous processor involvement.

High-Speed Serial Communication Performance

The serial controller supports asynchronous data rates of up to 15 Mbps, making the card suitable for applications that require faster communication than traditional basic serial interfaces. In isochronous mode, the controller supports rates of up to 60 Mbps when using an external x1 baud-rate clock.

Actual operating speed depends on the connected equipment, system configuration, cable quality, driver support, and communication protocol. Buyers should confirm the required baud rate and interface conditions before selecting the card for a specific integration project.

IEEE 1284 EPP Parallel-Port Support

In addition to the serial interface, W-952-1S1PL provides an IEEE 1284 EPP parallel port. This allows compatible computers to connect with established parallel printers, programmers, control equipment, testing devices, and specialized production machinery.

The combination of one serial port and one parallel port makes the card especially practical for legacy-system maintenance and controlled hardware migration. Businesses can continue using established equipment without replacing an entire computer system solely because native serial or parallel connections are unavailable.

Configurable PCI and Local Bus Architecture

The card controller complies with PCI Bus Specification 2.2 and Power Management Specification 1.0. Its pass-through function supports an 8-bit or 32-bit local bus that can operate asynchronously to the PCI clock.

UARTs, the local bus, and the parallel port can be configured with I/O or memory base addresses. The local bus provides up to four chip-select signals, which may be mapped to 4–256 bytes of I/O space and 4–16K of memory address space.

Twelve multi-purpose I/O pins can also be configured as interrupt inputs. Big Endian byte-lane conversion is supported for applicable system designs, while the multi-function PCI target controller facilitates the use of generic device drivers in combination-card applications.

Low-Profile Design for Compact Computer Installations

W-952-1S1PL uses a compact PCB and low-profile bracket configuration. The serial connector is positioned on the main card bracket, while the parallel connector is connected by ribbon cable to a separate low-profile bracket.

This two-bracket arrangement allows both interfaces to be installed in compact computer enclosures with restricted internal space. Before purchasing, buyers should confirm the available PCI slot, adjacent bracket position, internal cable clearance, connector orientation, operating-system compatibility, and driver requirements.

Recommended Application Scenarios

W-952-1S1PL can be considered for the following integration and maintenance applications:

• Industrial computers communicating with serial controllers or monitoring equipment

• Point-of-sale and service systems retaining established peripheral interfaces

• Laboratory, testing, and measurement systems using serial instruments

• Parallel printers, device programmers, and specialized production equipment

• Legacy-system maintenance and interface replacement projects

• Controlled migration from older computers to newer PCI-based systems

• Integration projects requiring one serial and one parallel connection

Why Choose W-952-1S1PL PCI to 1S/1P Card?

W-952-1S1PL combines legacy serial and parallel connectivity with advanced UART data management in a space-saving low-profile format. Its broad UART software compatibility, 128-byte transmit and receive FIFOs, flexible baud-rate control, automated flow control, configurable addressing, and IEEE 1284 EPP support make it practical for maintenance, integration, and equipment-upgrade projects.

For an accurate B2B quotation, buyers should provide the required quantity, destination market, operating system, motherboard PCI specification, intended serial and parallel devices, and expected delivery schedule.

Product availability may change. Please submit your application requirements to confirm current supply status, compatible replacement options, technical documentation, packaging information, lead time, and commercial terms.