MD8251A/B

6850 ASYNCHRON COMM INTERFACE ADAPTER $8.75

PC16550DN Universal Asynchronous Receiver $9.85

XR16M770IL24TR-F IC UART FIFO 64B 24QFN $1.3

ST16C654CJ68TR-F IC UART FIFO 64B QUAD 68PLCC $13.55

ST16C654CJ68-F IC UART FIFO 64B QUAD 68PLCC $5.91

SC16C550BIBS,128 SC16C550 $1.87

V62/03626-01XE ENHANCED PRODUCT 3.3 V DUAL UART $12.18

V62/03626-02XE ENHANCED PRODUCT 3.3 V DUAL UART $12.18

IS82C55A-596 82C55 - CMOS PROGRAMMABLE PERIPH $9.46

LD8251A LD8251A - SERIAL I/O CONTROLLER, $75.15