XR88C92/192
DUAL UNIVERSAL ASYNCHRONOUS
RECEIVER AND TRANSMITTER
June 2003
DESCRIPTION
TheXR88C92/192isaDualUniversalAsynchronousReceiverandTransmitterwith8(XR88C92)/16(XR88C192)
bytes transmit and receive FIFO. The XR88C92/192 is a pin and functional replacement for the SC26C92 and an
improvedversionofthePhilipsSCC2692UARTwithfasterdataaccessandotheradditionalfeatures.Theoperating
speed of the receiver and transmitter can be selected independently from a table of eighteen fixed baud rates, a
16Xclockderivedfromaprogrammablecounter/timer,oranexternal1Xor16Xclock.Thebaudrategeneratorand
counter/timercanoperatedirectlyfromacrystalorfromexternalclockinput. TheXR88C92/192providesapower-
downmodeinwhichtheoscillatorisstoppedbuttheregistercontentsareretained.TheXR88C92/192isfabricated
in an advanced CMOS process to achieve low power and high speed requirements.
FEATURES
PLCC Package
Addedfeaturesindeviceswithtopmarkingof"D2"and
newer:
• 5 volt tolerant inputs
• Pin to pin and functional compatible to SC26C92
• Enhanced Multidrop mode operation with separate
storage for address and data tags (9th bit)
• 8 Bytes transmit/receive FIFO (XR88C92)
•16 Bytes transmit/receive FIFO (XR88C192)
• Standard baud rates from 50bps to 230.4kbps
• Non-standard baud rate of up to 1Mbps
• TransmitandReceivetriggerlevels
• Watch dog timer
• Programmable clock source for receiver and trans-
mitter of each channel
• Singleinterruptoutput
• 7 Multipurpose inputs, 8 Multipurpose outputs
• 2.97 to 5.5 volt operation
• Programmable character lengths (5, 6, 7, 8)
• Parity, framing, andoverrunerrordetection
• Programmable16-bittimer/counter
• On-chip crystal oscillator
A3
IP0
7
39
38
37
36
35
34
33
32
31
30
29
-C S
R ESET
XTAL2
XTAL1
R XA
8
-IO W
-IO R
R XB
N .C.
TXB
O P1
O P3
O P5
O P7
9
10
11
12
13
14
15
16
17
XR88C92
XR88C192
N .C.
TXA
O P0
O P2
O P4
O P6
• Powerdownmode
ORDERING INFORMATION
Part number Package
Operating temperature Device Status
XR88C92CP 40-Lead PDIP
XR88C92CJ 44-Lead PLCC
XR88C92CV 44-Lead TQFP
0° C to + 70° C
0° C to + 70° C
0° C to + 70° C
-40° C to + 85° C
Discontinued. See the XR88C92CV for a replacement.
Active
Active
Discontinued. See the XR88C92IV for a replacement.
Active
Active
XR88C92IP
XR88C92IJ
XR88C92IV
40-Lead PDIP
44-Lead PLCC -40° C to + 85° C
44-Lead TQFP -40° C to + 85° C
XR88C192CP 40-Lead PDIP
XR88C192CJ 44-Lead PLCC
XR88C192CV 44-Lead TQFP
XR88C192IP 40-Lead PDIP
0° C to + 70° C
0° C to + 70° C
0° C to + 70° C
-40° C to + 85° C
Discontinued. See the XR88C192CV for a replacement.
Active
Active
Discontinued. See the XR88C192IV for a replacement.
XR88C192IJ 44-Lead PLCC -40° C to + 85° C
XR88C192IV 44-Lead TQFP -40° C to + 85° C
Active
Active
Rev.1.31
EXAR Corporation, 48720 Kato Road, Fremont, CA 94538 • (510) 668-7000 • FAX (510) 668-7017