ST16C580
UART WITH 16-BYTE FIFO’s AND
INFRARED (IrDA) ENCODER/DECODER
September 2003
GENERAL DESCRIPTION
TheST16C5801 isauniversalasynchronousreceiverandtransmitter(UART)andispincompatiblewiththeST16C550
UART.The580isanenhancedUARTwith16byteFIFO’s,automatichardware/softwareflowcontrol,anddatarates
up to 1.5Mbps. Onboard status registers provide the user with error indications and operational status. Modem
interfacecontrolisincludedandcanbeoptionallyconfiguredtooperatewiththeInfrared(IrDA)encoder/decoder.The
system interrupts may be tailored to meet user requirements. An internal loop-back capability allows onboard
diagnostics. The 580 is available in 40 pin PDIP, 44 pin PLCC, and 48 pin TQFP packages. It is fabricated in an
advancedCMOSprocesstoachievelowdrainpowerandhighspeedrequirements.
FEATURES
PLCC Package
• PintopinandfunctionallycompatibletotheIndustry
Standard16550
• 2.97 to 5.5 volt operation
• 1.5Mbpstransmit/receiveoperation(24MHz)
• 16 byte transmit FIFO
7
39
38
37
36
35
34
33
32
31
30
29
D5
D6
RESET
-OP1
-DTR
-RTS
-OP2
N.C.
INT
8
• 16 byte receive FIFO with error flags
• Automatichardware/softwareflowcontrol
• ProgrammableXon/Xoffcharacters
• Independenttransmitandreceivecontrol
• Software selectable Baud Rate Generator pre-
scaleable clock rates of 1X or 4X
• Fourselectabletransmit/receiveFIFOinterrupttrig-
gerlevels
• StandardmodeminterfaceorInfraredIrDAencode/
decoderinterface
9
D7
10
11
12
13
14
15
16
17
RCLK
RX
N.C.
XR16C580CJ44
TX
CS0
-RXRDY
A0
CS1
-CS2
-BAUDOUT
A1
A2
• Sleep mode ( 200µA stand-by )
• Low operating current ( 1.2mA typ.)
ORDERING INFORMATION
Part number
Package
Operating temp
Device Status
ST16C580CP40
ST16C580CJ44
ST16C580CQ48
ST16C580IP40
ST16C580IJ44
ST16C580IQ48
40-Lead PDIP
44-Lead PLCC 0° C to + 70° C
48-Lead TQFP 0° C to + 70° C
40-Lead PDIP
44-Lead PLCC -40° C to + 85° C
48-Lead TQFP -40° C to + 85° C
0° C to + 70° C
Discontinued. See the ST16C580CQ48 for a replacement.
Discontinued. See the ST16C580CQ48 for a replacement.
Active
Discontinued. See the ST16C580IQ48 for a replacement.
Discontinued. See the ST16C580IQ48 for a replacement.
Active
-40° C to + 85° C
*Note 1 Covered by U.S. Patent #5,649,122.
Rev.1.20
EXAR Corporation, 48720 Kato Road, Fremont, CA 94538 • (510) 668-7000 • FAX (510) 668-7017