TL16PNP100AFN

The TL16PNP100AFN is a standalone ISA Plug and Play controller from Texas Instruments, a device that brings a legacy ISA/AT add-in card into the PnP autoconfiguration process. It isolates the card, accepts a Card Select Number, reads the card's resource data from an external EEPROM, and then activates the card once the system assigns its resources, all without a local processor. It runs from a single 5V supply over 0°C to 70°C and is offered here in a 44-pin PLCC.

Key Features

• Standalone PnP autoconfiguration - handles the full ISA Plug and Play isolation, Card Select Number assignment, and activation sequence on its own.
• Two logical devices - supports two I/O-based logical devices on the card; DMA channels are not supported.
• 22 MHz clock - a 10 to 22 MHz external clock input drives the PnP logic and derives the internal 0.68 MHz SCLK.
• 8-bit host data bus - a bidirectional 8-bit bus and the standard PnP address, write-data, and read-data ports interface to the CPU.
• Programmable I/O decode - 10-bit I/O address decoding with selectable 1, 2, 4, 8, or 16-byte block sizes.
• EEPROM and interrupt support - a 3-wire interface to an ST93C56 or ST93C66 EEPROM and interrupt mapping to IRQ3 through IRQ7 and IRQ9.
• Shared EEPROM access - the three-state EEPROM interface lets another on-board controller reach the same EEPROM after configuration completes.

Typical Applications

• ISA Plug and Play add-in cards - adding PnP autoconfiguration to I/O cards for PC/AT systems.
• Industrial ISA hardware - long-life embedded and instrumentation boards on the ISA bus.
• Legacy system maintenance - sustaining PnP ISA designs still in service.

Unique Advantages

• No local CPU required - the controller runs the entire PnP handshake by itself, keeping simple cards simple.
• EEPROM-driven resources - storing the resource data structure in a small serial EEPROM makes card configuration easy to define and update.
• Socket-friendly PLCC - the 44-pin PLCC fits sockets and rework on prototype and service boards.
• Standards-based interface - the familiar PnP address, write-data, and relocatable read-data ports keep BIOS and driver support straightforward.

Why Choose TL16PNP100AFN?

The TL16PNP100AFN is the part to reach for when an ISA card needs standards-compliant Plug and Play without adding a microcontroller. Its self-contained autoconfiguration, EEPROM-based resource storage, and flexible I/O decoding make PnP straightforward, and the 44-pin PLCC keeps it practical for sockets and for servicing the ISA hardware that still depends on it. Supporting two logical devices with programmable block sizes and mapping to six common interrupt lines covers the needs of most simple I/O cards.

Contact us for pricing, availability, and lead time on the TL16PNP100AFN, and ask about the 48-pin TQFP version for surface-mount designs.