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HC-05 - Bluetooth to Serial Port Module
CH348 - USB to 8-port serial chip
PEF20534 - DMA Supported Serial Communication Controller with 4 Channels
PEB20534 - DMA Supported Serial Communication Controller
ADM3315E - 2.7V to 3.6V Serial Port Transceivers
MAX3185 - RS-232 Serial Port
LMX9820A - Bluetooth Serial Port Module
LE24CBK23MC - Dual port EEPROM Two Wire Serial Interface
AD7249 - LC2MOS Dual 12-Bit Serial DACPORT
CAT24C208 - 8kb Dual Port Serial EEPROM
XRS10L240 - SERIAL ATA II: PORT MULTIPLIER / PORT SELECTOR
P82C150AHT - CAN Serial Linked I/O device SLIO with digital and analog port functions
ADM3312E - 2.7V to 3.6V Serial Port Transceivers
LMX9820 - Bluetooth Serial Port Module
MAX3186 - RS-232 Serial Port
AX78120 - USB 2.0 to Dual Serial Ports Controller
BR9010 - 1/ 2/ and 4k bit EEPROMs for direct connection to serial ports
ADM3311E - 2.7V to 3.6V Serial Port Transceivers
USBN9602 - USBN9602 (Universal Serial Bus) Full Speed Function Controller With DMA Support
KL5KUSB105 - USB to 4 Serial Ports