TL16C552A, TL16C552AM
DUAL ASYNCHRONOUS COMMUNICATIONS ELEMENT
WITH FIFO
SLLS189D – NOVEMBER 1994 – REVISED JANUARY 1999
PN PACKAGE
(TOP VIEW)
NC
INT1
INT2
SLIN
INIT
AFD
STB
GND
PD0
PD1
PD2
PD3
PD4
PD5
PD6
PD7
INT0
NC
NC
RXRDY1
SIN1
ERR
V
DD
SLCT
BUSY
PE
ACK
PEMD
TRI
CS1
CLK
DSR1
RI1
GND
DCD1
RXRDY0
NC
80 79 78 77 76 75 74 73 72 71 70 69 68 67 66 65 64 63 62 61
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
60
59
58
57
56
55
54
53
52
51
50
49
48
47
46
45
44
43
42
41
21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
BDO
NC
NC
NC
ENIRQ
TXRDY1
SIN0
V
DD
RESET
CS2
IOR
IOW
A0
A1
A2
CS0
DSR0
RI0
DCD0
CTS0
GND
NC
NC
description
The TL16C552A is an enhanced dual-channel version of the popular TL16C550B asynchronous
communications element (ACE). The device serves two serial input /output interfaces simultaneously in
microcomputer or microprocessor-based systems. Each channel performs serial-to-parallel conversion on data
characters received from peripheral devices or modems and parallel-to-serial conversion on data characters
transmitted by the CPU. The complete status of each channel of the dual ACE can be read at any time during
functional operation by the CPU. The information obtained includes the type and condition of the transfer
operations being performed and the error conditions encountered.
In addition to its dual communications interface capabilities, the TL16C552A provides the user with a
bidirectional parallel data port that fully supports the parallel Centronics-type printer interface. The parallel port
and the two serial ports provide IBM PC/AT-compatible computers with a single device to serve the three system
ports. A programmable baud rate generator that can divide the timing reference clock input by a divisor between
1 and (2
16
– 1) is included.
The TL16C552A is available in a 68-pin plastic-leaded chip-carrier (FN) package, a 48-pin TQFP (PN) package,
and the 80-pin TQFP (PN) package. The TL16C552AM is available in a 68-pin ceramic quad flat (HV) package.
2
NC
NC
SOUT1
DTR1
RTS1
CTS1
DB0
DB1
DB2
DB3
DB4
DB5
DB6
DB7
TXRDY0
V
DD
RTS0
DTR0
SOUT0
NC
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DALLAS, TEXAS 75265
TI [ TEXAS INSTRUMENTS ]
