ST16C450 Exar Corporation, ST16C450 Datasheet
ST16C450
Manufacturer Part Number
ST16C450
Description
UNIVERSAL ASYNCHRONOUS RECEIVER/TRANSMITTER (UART)
Manufacturer
Exar Corporation
Datasheet
1.ST16C450.pdf
(28 pages)
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The ST16C450 is a universal asynchronous receiver
and transmitter. The ST16C450 is an improved ver-
sion of the NS16450 UART with higher operating
speed and lower access time. A programmable baud
rate generator is provided to select transmit and
receive clock rates from 50 Bps to 1.5 Mbps.
The ST16C450 on board status registers provides the
error
operation being performed. Included is complete
MODEM control capability, and a processor interrupt
system that may be software tailored to the user’s
requirements. The ST16C450 provides internal loop-
back capability for on board diagnostic testing.
The ST16C450 is available in 40 pin PDIP, 44 pin
PLCC, and 48 pin TQFP packages. It is fabricated in
an advanced CMOS process to achieve low drain
power and high speed requirements.
ST16C450IP40
ST16C450IJ44
ST16C450IQ48
Part number
ST16C450CP40
ST16C450CJ44
ST16C450CQ48
GENERAL DESCRIPTION
FEATURES
Pin to pin and functionally compatible to the Indus-
try Standard 16450
2.97 to 5.5 volt operation
1.5 Mbps transmit/receive operation (24MHz)
Programmable word lengths (5, 6, 7, 8)
Even, odd, force, or no parity generation and
detection
Independent transmit and receive control
Standard modem interface
Low operating current ( 1.2mA typ.)
ORDERING INFORMATION
Rev. 4.20
EXAR Corporation, 48720 Kato Road, Fremont, CA 94538 (510) 668-7000 FAX (510) 668-7017
conditions, type and status of the transfer
Package
40-Lead PDIP
44-Lead PLCC
48-Lead TQFP
40-Lead PDIP
44-Lead PLCC
48-Lead 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
-BAUDOUT
Device Status
Active. See the ST16C450CQ48 for new designs.
Active
Active
Active
Active
Active. See the ST16C450IQ48 for new designs.
RCLK
-CS2
N.C.
CS0
CS1
RX
D5
D6
D7
TX
RECEIVER/TRANSMITTER (UART)
10
11
12
13
14
15
16
17
7
8
9
UNIVERSAL ASYNCHRONOUS
PLCC Package
ST16C450CJ44
ST16C450
September 2003
39
38
37
36
35
34
33
32
31
30
29
RESET
-OP1
-DTR
-RTS
-OP2
N.C.
INT
N.C.
A0
A1
A2
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