FIGURE 2. PIN OUT ASSIGNMENT
48
47
46
45
44
43
42
41
40
39
38
37
1
2
3
4
5
6
7
8
9
10
11
12
36
35
34
33
32
31
30
29
28
27
26
25
13
14
15
16
17
18
19
20
21
22
23
24
D5
D6
D7
RXB
RXA
TXRDYB#
TXA
TXB
OP2B#
CSA#
CSB#
PWRSAVE
XTAL
1
XTAL
2
IO
W
#
CD
B
#
GN
D
RX
R
DY
B
#
IO
R
#
DS
R
B
#
RI
B
#
R
T
SB#
CTS
B
#
16
/6
8#
RESET
DTRB#
DTRA#
RTSA#
OP2A#
RXRDYA#
INTA
INTB
A0
A1
A2
CLKSEL
D4
D3
D2
D1
D0
TXR
D
YA#
VC
C
RI
A
#
CD
A
#
DS
R
A
#
C
T
SA#
HD
CNTL
#
XR16L2751
48-pin TQFP
(16 Mode )
VCC
48
47
46
45
44
43
42
41
40
39
38
37
1
2
3
4
5
6
7
8
9
10
11
12
36
35
34
33
32
31
30
29
28
27
26
25
13
14
15
16
17
18
19
20
21
22
23
24
D5
D6
D7
RXB
RXA
TXRDYB#
TXA
TXB
OP2B#
CS#
A3
PWRSAVE
XTAL
1
XTAL
2
R/
W#
CDB
#
GND
RX
RDY
B
#
VC
C
DS
RB
#
RI
B
#
R
TSB#
C
TSB#
16/
68#
RESET#
DTRB#
DTRA#
RTSA#
OP2A#
RXRDYA#
IRQ#
INTB
A0
A1
A2
CLKSEL
D4
D3
D2
D1
D0
TXR
D
YA#
VC
C
RI
A
#
CDA
#
DS
R
A
#
C
TSA#
HDCN
T
L#
XR16L2751
48-pin TQFP
(68 Mode )
GND
ORDERING INFORMATION
PART NUMBER
PACKAGE
OPERATING TEMPERATURE RANGE
DEVICE STATUS
XR16L2751CM
48-Lead TQFP
0°C to +70°C
Active
XR16L2751IM
48-Lead TQFP
-40°C to +85°C
Active
XR16L2751
2.25V TO 5.5V DUART WITH 64-BYTE FIFO AND POWERSAVE
REV. 1.2.3
2