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ST16C454

Description
Quad UART with a Dual Foot Print Interface
Categorysemiconductor    Analog mixed-signal IC   
File Size180KB,29 Pages
ManufacturerExar [Exar Corporation]
Download Datasheet Compare View All

ST16C454 Overview

Quad UART with a Dual Foot Print Interface

ST16C454
QUAD UNIVERSAL ASYNCHRONOUS
RECEIVER/TRANSMITTER (UART)
DESCRIPTION
-CDA
GND
RXA
-RIA
PLCC Package
INTSEL
68
67
66
65
64
63
62
61
9
8
7
6
5
4
3
2
1
-CDD
VCC
RXD
-RID
D7
D6
D5
D4
D3
D2
D1
D0
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
-CTSA
-DTRA
VCC
-RTSA
INTA
-CSA
TXA
-IOW
TXB
-CSB
INTB
-RTSB
GND
-DTRB
-CTSB
-DSRB
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
60
59
58
57
56
55
54
53
-DSRD
-CTSD
-DTRD
GND
-RTSD
INTD
-CSD
TXD
-IOR
TXC
-CSC
INTC
-RTSC
VCC
-DTRC
-CTSC
-DSRC
ST16C454CJ68
16 MODE
52
51
50
49
48
47
46
45
44
-CDB
RXB
RESET
GND
VCC
RXC
-RIC
62
-RID
XTAL1
XTAL2
16/-68
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
-CTSA
-DTRA
VCC
-RTSA
-IRQ
-CS
TXA
R/-W
TXB
A3
N.C.
-RTSB
GND
-DTRB
-CTSB
-DSRB
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
68
67
66
65
64
63
61
60
59
58
57
56
55
54
9
8
7
6
5
4
3
2
1
-CDD
-CDA
GND
VCC
RXD
RXA
-RIA
N.C.
D7
D6
D5
D4
D3
D2
D1
D0
-CDC
-RIB
A2
A1
A0
N.C.
N.C.
-DSRD
-CTSD
-DTRD
GND
-RTSD
N.C.
N.C.
TXD
N.C.
TXC
A4
N.C.
-RTSC
VCC
-DTRC
-CTSC
-DSRC
ST16C454CJ68
68 MODE
53
52
51
50
49
48
47
46
45
44
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
-RIC
-CDB
RXB
-RESET
A2
A1
16/-68
A0
XTAL1
XTAL2
GND
VCC
RXC
ORDERING INFORMATION
Part number
Package
Operating temperature
Device Status
ST16C454CJ68
ST16C454IJ68
68-Lead PLCC
68-Lead PLCC
0° C to + 70° C
-40° C to + 85° C
Active
Active
Rev. 3.31
EXAR
Corporation, 48720 Kato Road, Fremont, CA 94538
(510) 668-7000
FAX (510) 668-7017
-CDC
-RIB
N.C.
N.C.
43

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