ST16C550


UART With 16-Byte FIFOs

Features

  • Pin to pin and functionally compatible to the Industry Standard 16C550
  • 24MHz clock operation at 5V
  • 16MHz clock operation at 3.3V
  • 16 byte transmit FIFO
  • 16 byte receive FIFO with error flags
  • Full duplex operation
  • Transmit and receive control
  • Four selectable receive FIFO interrupt trigger levels
  • Standard modem interface
  • Compatible with ST16C450
  • Low operating current ( 1.2mA typ.)
  • Pb-Free, RoHS Compliant Versions Offered
Applications

  • Battery Operated Electronics
  • Internet Appliances
  • Handheld Terminal
  • Personal Digital Assistants
  • Cellular Phones DataPort
Description
The ST16C550 is a universal asynchronous receiver and transmitter with 16 byte transmit and receive FIFO. A programmable baud rate generator is pro- vided to select transmit and receive clock rates from 50 bps to 1.5 Mbps.

The ST16C550 is an improved version of the NS16C550 UART with higher operating speed and lower access time. The ST16C550 on board status registers provides the error conditions, type and status of the transfer operation being performed. Included is complete MODEM control capability, and a processor interrupt system that may be software tailored to the user’s requirements. The ST16C550 provides internal loop-back capability for on board diagnostic testing.

The ST16C550 is available in 40-pin PDIP, 44-pin PLCC, and 48-pin TQFP packages. It is fabricated in an advanced 0.6m CMOS process to achieve low drain power and high speed requirements.

For UART technical support or to obtain an IBIS model for this product, please email Exar's UART Technical Support group.

Part NumberPkg CodeRoHSMin
Temp.
(°C)
Max
Temp.
(°C)
StatusBuy NowOrder Samples
ST16C550CJ44-FPLCC44PLCC44070Active
ST16C550CJ44TR-FPLCC44PLCC44070Active
ST16C550CQ48-FTQFP48TQFP48070Active
ST16C550CQ48TR-FTQFP48TQFP48070Active
ST16C550IJ44-FPLCC44PLCC44-4085Active
ST16C550IJ44TR-FPLCC44PLCC44-4085Active
ST16C550IQ48-FTQFP48TQFP48-4085Active
ST16C550IQ48TR-FTQFP48TQFP48-4085Active
ST16C550CP40-FPDIP40PDIP40070EOL
ST16C550IP40-FPDIP40PDIP40-4085EOL
ST16C550CP40PDIP40070OBS
ST16C550IP40PDIP40-4085OBS

Part Status Legend
Active - the part is released for sale, standard product.
EOL (End of Life) - the part is no longer being manufactured, there may or may not be inventory still in stock.
CF (Contact Factory) - the part is still active but customers should check with the factory for availability. Longer lead-times may apply.
PRE (Pre-introduction) - the part has not been introduced or the part number is an early version available for sample only.
OBS (Obsolete) - the part is no longer being manufactured and may not be ordered.
NRND (Not Recommended for New Designs) - the part is not recommended for new designs.