XR68C192 Datasheet, PDF (1/32 Pages) Exar Corporation – DUAL UNIVERSAL ASYNCHRONOUS RECEIVER AND TRANSMITTER

XR68C92/192
DUAL UNIVERSAL ASYNCHRONOUS
RECEIVER AND TRANSMITTER
DESCRIPTION
May 2000
The XR68C92/192 is a Dual Universal Asynchronous Receiver and Transmitter with 8 (XR68C92) or 16 (XR68C192)
bytes of transmit and receive FIFOs. The XR68C92/192 is pin-to-pin and functionally compatible to the XR68C681
and Philips SCC68681 UART with additional features. The operating speed of the receiver and transmitter can be
selected independently from a table of twenty four fixed baud rates, a 16X clock derived from a programmable counter/
timer, or an external 1X or 16X clock. The baud rate generator and counter/timer can operate directly from a crystal
or from external clock input. The XR68C92/192 provides a power down mode in which the oscillator is stopped but
the register contents are retained. The XR68C92/192 is fabricated in an advanced CMOS process to achieve low power
and high speed requirements.
FEATURES
•Pin to pin and functionally compatible to XR68C681
and SCC68692
•Full duplex transmit and receive operation
•8 bytes of transmit/receive FIFOs (XR68C92)
•16 bytes of transmit/receive FIFOs (XR68C192)
•Programmable character lengths (5, 6, 7, 8)
•Parity, framing, and over run error detection
•Programmable 16-bit timer/counter
•On-chip crystal oscillator
•Single interrupt output with eight selectable interrupt-
ing conditions
•External 1X or 16X clock
•Data rate up to 1Mbps
•Independent transmit and receive baud rates from
50bps to 230.4kbps
•6 General purpose inputs
•8 General purpose outputs
•TTL compatible inputs, outputs
•4 Transmit/receive trigger levels
•Watch dog timer
•Multi-drop mode compatible with 8051 nine bit mode
•3.3 or 5 volts operation
•Loopback modes
•Power down mode
A4 7
IP0 8
R/-W 9
-DTACK 10
RXB 11
N.C. 12
TXB 13
OP1 14
OP3 15
OP5 16
OP7 17
PLCC Package
XR68C92
XR68C192
39 -CS
38 -RESET
37 XTAL2
36 XTAL1
35 RXA
34 N.C.
33 TXA
32 OP0
31 OP2
30 OP4
29 OP6
ORDERING INFORMATION
Part number
XR68C92CP
XR68C92CJ
XR68C92CV
XR68C92IP
XR68C92IJ
XR68C92IV
Pins Package
40 PDIP
44 PLCC
44 TQFP
40 PDIP
44 PLCC
44 TQFP
Operating temperature
0° C to + 70° C
0° C to + 70° C
0° C to + 70° C
-40° C to + 85° C
-40° C to + 85° C
-40° C to + 85° C
Part number
XR68C192CP
XR68C192CJ
XR68C192CV
XR68C192IP
XR68C192IJ
XR68C192IV
Pins PackageOperating temperature
40 PDIP
0° C to + 70° C
44 PLCC
0° C to + 70° C
44 TQFP
0° C to + 70° C
40 PDIP
-40° C to + 85° C
44 PLCC
-40° C to + 85° C
44 TQFP
-40° C to + 85° C
Rev. P2.10
www.exar.com
EXAR Corporation, 48720 Kato Road, Fremont, CA 94538 • [phone] • FAX [phone]