TL16C450
ASYNCHRONOUS COMMUNICATIONS ELEMENT
SLLS037B – MARCH 1988 – REVISED MARCH 1996
N PACKAGE
(TOP VIEW)
Programmable Baud Rate Generator Allows
Division of Any Input Reference Clock by 1
to (2 –1) and Generates an Internal 16×
16
D0
D1
D2
D3
D4
D5
D6
D7
V
RI
DCD
DSR
CTS
MR
1
40
39
38
37
36
35
34
CC
Clock
2
Full Double Buffering Eliminates the Need
for Precise Synchronization
3
4
5
Standard Asynchronous Communication
Bits (Start, Stop, and Parity) Added or
Deleted to or From the Serial Data Stream
6
OUT1
7
8
33 DTR
32 RTS
31 OUT2
Independent Receiver Clock Input
RCLK
SIN
9
10
11
12
13
14
15
Transmit, Receive, Line Status, and Data
Set Interrupts Independently Controlled
SOUT
CS0
CS1
CS2
BAUDOUT
30
29
28
27
26
25
24
23
22
21
INTRPT
NC
A0
A1
A2
Fully Programmable Serial Interface
Characteristics:
– 5-, 6-, 7-, or 8-Bit Characters
– Even-, Odd-, or No-Parity Bit Generation
and Detection
XTAL1 16
XTAL2 17
ADS
CSOUT
DDIS
DISTR
DISTR
– 1-, 1 1/2-, or 2-Stop Bit Generation
– Baud Generation (dc to 256 Kbit/s)
18
19
20
DOSTR
DOSTR
V
False Start Bit Detection
SS
Complete Status Reporting Capabilities
FN PACKAGE
(TOP VIEW)
3-State TTL Drive Capabilities for
Bidirectional Data Bus and Control Bus
Line Break Generation and Detection
6 5
4
3
2
1 44 43 42 41 40
39 MR
Internal Diagnostic Capabilities:
– Loopback Controls for Communications
Link Fault Isolation
– Break, Parity, Overrun, Framing Error
Simulation
7
D5
D6
D7
8
38
37
36
35
34
33
32
31
30
29
OUT1
DTR
RTS
OUT2
NC
INTRPT
NC
A0
9
10
11
12
13
14
15
16
17
RCLK
SIN
NC
SOUT
CS0
Fully Prioritized Interrupt System Controls
Modem Control Functions (CTS, RTS, DSR,
DTR, RI, and DCD)
CS1
CS2
BAUDOUT
A1
A2
Easily Interfaces to Most Popular
Microprocessors
18 19 20 21 22 23 24 25 26 27 28
Faster Plug-In Replacement for National
Semiconductor NS16C450
description
NC – No internal connection
The TL16C450 is a CMOS version of an asynchronous communications element (ACE). It typically functions
in a microcomputer system as a serial input/output interface.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
Copyright 1996, Texas Instruments Incorporated
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265