Datasheet
TL16C552A, TL16C552AM
DUAL ASYNCHRONOUS COMMUNICATIONS ELEMENT
WITH FIFO
SLLS189D – NOVEMBER 1994 – REVISED JANUARY 1999
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
22 23
NC
ENIRQ
TXRDY1
SIN0
V
DD
RESET
CS2
IOR
IOW
A0
A1
A2
CS0
DSR0
RI0
DCD0
CTS0
GND
NC
NC
60
59
58
57
56
55
54
53
52
51
50
49
48
47
46
45
44
43
42
41
24
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
NC
NC
RXRDY1
SIN1
ERR
V
DD
SLCT
BUSY
PE
ACK
PEMD
TRI
CS1
CLK
DSR1
RI1
GND
DCD1
RXRDY0
NC
25 26 27 28
PN PACKAGE
(TOP VIEW)
PD2
79 78 77 76 7580 74
INT2
SLIN
INIT
AFD
STB
GND
PD0
DB4
DB6
SOUT1
DTR1
RTS1
CTS1
DB0
DB1
DB2
72 71 7073
29 30 31 32 33
69 68
21
NC
PD4
67 66 65 64
34 35 36 37
DB7
TXRDY0
RTS0
PD5
PD6
PD7
INT0
NC
INT1
DTR0
SOUT0
38 39 40
BDO
NC
63 62 61
PD1
PD3
NC
DB3
NC
DB5
NC
V
DD
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 and a 80-pin TQFP (PN)
package. The TL16C552AM is available in a 68-pin ceramic quad flat (HV) package.