ST16C454_05 Datasheet, PDF (1/29 Pages) Exar Corporation – QUAD UNIVERSAL ASYNCHRONOUS RECEIVER/TRANSMITTER (UART)

ST16C454
QUAD UNIVERSAL ASYNCHRONOUS
RECEIVER/TRANSMITTER (UART)
DESCRIPTION
The ST16C454 is a universal asynchronous receiver
and transmitter (UART) with a dual foot print interface.
The 454 is an enhanced UART with data rates up to
1.5Mbps and software compatible to ST16C450.
Onboard status registers provide the user with error
indications, operational status, and modem interface
control. System interrupts may be tailored to meet user
requirements. An internal loop-back capability allows
onboard diagnostics. The ST16C454 offer an additional
68 mode which allows easy integration with Motorola,
and other popular microprocessors. The 454 combines
the package interface modes of the ST16C454 on a
single integrated chip with a selection pin.
-DSRA 10
-CTSA 11
-DTRA 12
VCC 13
-RTSA 14
INTA 15
-CSA 16
TXA 17
-IOW 18
TXB 19
-CSB 20
INTB 21
-RTSB 22
GND 23
-DTRB 24
-CTSB 25
-DSRB 26
PLCC Package
ST16C454CJ68
16 MODE
60 -DSRD
59 -CTSD
58 -DTRD
57 GND
56 -RTSD
55 INTD
54 -CSD
53 TXD
52 -IOR
51 TXC
50 -CSC
49 INTC
48 -RTSC
47 VCC
46 -DTRC
45 -CTSC
44 -DSRC
FEATURES
• Software compatibility with the Industry Standard
16C450
• 2.97 to 5.5 volt operation
• Intel or Motorola data bus interface select
• 1.5 Mbps transmit/receive operation (24MHz)
• Independent transmit and receive control
• Software selectable Baud Rate Generator
• Modem control signals (-CTS, -RTS, -DSR, -DTR,
-RI, -CD)
• Programmable character lengths (5, 6, 7, 8)
• Even, odd, or no parity bit generation and detection
• Internal loop-back diagnostics
• TTL compatible inputs, outputs
• Low power
-DSRA 10
-CTSA 11
-DTRA 12
VCC 13
-RTSA 14
-IRQ 15
-CS 16
TXA 17
R/-W 18
TXB 19
A3 20
N.C. 21
-RTSB 22
GND 23
-DTRB 24
-CTSB 25
-DSRB 26
ST16C454CJ68
68 MODE
60 -DSRD
59 -CTSD
58 -DTRD
57 GND
56 -RTSD
55 N.C.
54 N.C.
53 TXD
52 N.C.
51 TXC
50 A4
49 N.C.
48 -RTSC
47 VCC
46 -DTRC
45 -CTSC
44 -DSRC
ORDERING INFORMATION
Part number
Package
ST16C454CJ68 68-Lead PLCC
ST16C454IJ68 68-Lead PLCC
Operating temperature
0° C to + 70° C
-40° C to + 85° C
Device Status
Active
Active
Rev. 3.31
EXAR Corporation, 48720 Kato Road, Fremont, CA 94538 • [phone] • FAX [phone]