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ST16C554/554D
2
2.97V TO 5.5V QUAD UART WITH 16-BYTE FIFO
REV. 4.0.1
FIGURE 2. PIN OUT ASSIGNMENT
ORDERING INFORMATION
PART NUMBER
PACKAGE
OPERATING TEMPERATURE
RANGE
DEVICE STATUS
ST16C554CQ64
64-Lead LQFP
0°C to +70°C
Active
ST16C554DCQ64
64-Lead LQFP
0°C to +70°C
Active
ST16C554DIQ64
64-Lead LQFP
-40°C to +85°C
Active
ST16C554DCJ68
68-Lead PLCC
0°C to +70°C
Active
ST16C554DIJ68
68-Lead PLCC
-40°C to +85°C
Active
ST68C554CJ68
68-Lead PLCC
0°C to +70°C
Active
ST68C554IJ68
68-Lead PLCC
-40°C to +85°C
Active
9
8
7
6
5
4
3
2
1
68
67
66
65
64
63
62
63
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
60
59
58
57
56
55
54
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
43
DSRA#
CTSA#
DTRA#
VCC
RTSA#
INTA
CSA#
TXA
IOW#
TXB
CSB#
INTB
RTSB#
GND
DTRB#
CTSB#
DSRB#
CD
B
#
RIB
#
RX
B
VC
C
16
/68#
A2
A1
A0
XT
A
L
1
XT
A
L
2
RE
S
E
T
RX
RDY
#
TX
RDY
#
GN
D
RX
C
RI
C#
CDC#
DSRD#
CTSD#
DTRD#
GND
RTSD#
INTD
CSD#
TXD
IOR#
TXC
CSC#
INTC
RTSC#
VCC
DTRC#
CTSC#
DSRC#
CDA
#
RI
A
#
RX
A
GN
D
D7
D6
D5
D4
D3
D2
D1
D0
INT
S
E
L
VC
C
RX
D
RID#
CDD#
ST16C554
68-pin PLCC
Intel Mode
(16/68# pin connected to VCC)
9
8
7
6
5
4
3
2
1
68
67
66
65
64
63
62
63
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
60
59
58
57
56
55
54
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
43
DSRA#
CTSA#
DTRA#
VCC
RTSA#
IRQ#
CS#
TXA
R/W#
TXB
A3
N.C.
RTSB#
GND
DTRB#
CTSB#
DSRB#
CD
B
#
RI
B#
RXB
VCC
16/
68#
A2
A1
A0
XTAL
1
XTAL
2
RESET
RXRDY#
T
X
RDY#
GND
RXC
RI
C
#
CDC#
DSRD#
CTSD#
DTRD#
GND
RTSD#
N.C.
TXD
N.C.
TXC
A4
N.C.
RTSC#
VCC
DTRC#
CTSC#
DSRC#
CDA#
RI
A
#
RXA
GN
D
D7
D6
D5
D4
D3
D2
D1
D0
GND
VC
C
RX
D
RI
D#
CDD#
ST16C554
68-pin PLCC
Motorola Mode
(16/68# pin connected to GND)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
64
63
62
61
60
59
58
57
56
55
54
53
52
51
50
49
DSRA#
CTSA #
DTRA #
VCC
RTSA #
INTA
CSA#
TXA
IOW#
TXB
CSB#
INTB
RTSB #
GND
DTRB #
CTSB #
DS
RB
#
CD
B
#
RI
B
#
RX
B
VC
C
A2
A1
A0
XT
AL
1
XT
AL
2
RE
S
E
T
GN
D
RX
C
RI
C#
CD
C#
DS
RC
#
DSRD #
CTSD #
DTRD #
GND
RTSD #
INTD
CSD #
TXD
IOR#
TXC
CSC #
INTC
RTSC #
VCC
DTRC #
CTSC #
CD
A
#
RI
A
#
RX
A
GN
D
D7
D6
D5
D4
D3
D2
D1
D0
VC
C
RX
D
RI
D#
CD
D#
ST16C554/554D
64-pin TQFP
Intel Mode Only
9
8
7
6
5
4
3
2
1
68
67
66
65
64
63
62
63
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
60
59
58
57
56
55
54
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
43
DSRA#
CTSA#
DTRA#
VCC
RTSA#
IRQ#
CS#
TXA
R/W#
TXB
A3
N.C.
RTSB#
GND
DTRB#
CTSB#
DSRB#
CD
B
#
RI
B#
RXB
VCC
GN
D
A2
A1
A0
XTAL
1
XTAL
2
RESET
RXRDY#
T
X
RDY#
GND
RXC
RI
C
#
CDC#
DSRD#
CTSD#
DTRD#
GND
RTSD#
N.C.
TXD
N.C.
TXC
A4
N.C.
RTSC#
VCC
DTRC#
CTSC#
DSRC#
CDA#
RI
A
#
RXA
GN
D
D7
D6
D5
D4
D3
D2
D1
D0
GND
VC
C
RX
D
RI
D#
CDD#
ST68C554
68-pin PLCC
Motorola Mode Only