ST16C554

ST16C554/554D ST68C554 QUAD UART WITH 16-BYTE FIFO’S DESCRIPTION The ST16C554D is a universal asynchronous receiver and transmitter (UART) with a dual foot print interface. The 554D is an enhanced UART with 16 byte FIFOs, receive trigger levels and data rates up to 1.5Mbps. Onboard status registers provide the user with error indications and operational status, modem interface control. System interrupts may be tailored to meet user requirements. An internal loopback capability allows onboard diagnostics. The 554D is available in 64 pin TQFP, and 68 pin PLCC packages. The 68 pin PLCC package offer an additional 68 mode which allows easy integration with Motorola, and other popular microprocessors. The ST16C554CQ64 (64 pin) offers three state interrupt control while the ST16C554DCQ64 provides constant active interrupt outputs. The 64 pin devices do not offer TXRDY/ RXRDY outputs. The 554D combines the package interface modes of the 16C554 and 68C554 series on a single integrated chip. PLCC Package INTSEL -CDD 61 60 59 58 57 56 55 54 -CDA GND VCC RXD 63 RXA -RID 62 -RIA D7 D6 D5 D4 D3 D2 D1 67 68 66 D0 65 -DSRA -CTSA -DTRA VCC -RTSA INTA -CSA TXA -IOW TXB -CSB INTB -RTSB GND -DTRB -CTSB -DSRB 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 64 9 8 7 6 5 4 3 2 1 -DSRD -CTSD -DTRD GND -RTSD INTD -CSD TXD -IOR TXC -CSC INTC -RTSC VCC -DTRC -CTSC -DSRC ST16C554DCJ68 16 MODE 53 52 51 50 49 48 47 46 45 44...