FIGURE 2. PIN OUT OF THE DEVICE
40
39
38
37
36
35
34
33
32
31
1
2
3
4
5
6
7
8
9
10
30
29
28
27
26
25
24
23
22
21
11
12
13
14
15
16
17
18
19
20
GND
XR19L400
40-pin QFN
Motorola Bus Mode
A0
A1
A2
IRQ#
TE
ST1
TE
ST0
HALF
/FULL#
VCC50
TX
A+
GN
D
D0
D1
D2
D3
D4
D5
D6
D7
CS#
TEST2
POW
E
R
SAVE
XT
AL
1
XT
AL
2
R/
W#
NC
I/M
#
R
E
SET
#
AC
P
R_E
N
TXA-
NC
RXA+
RXA-
C1+
C1-
NC
VCC33
40
39
38
37
36
35
34
33
32
31
1
2
3
4
5
6
7
8
9
10
30
29
28
27
26
25
24
23
22
21
11
12
13
14
15
16
17
18
19
20
VCC
XR19L 400
40 - pin QFN
Intel Bus Mode
A0
A1
A2
INT
TE
ST1
TE
ST0
HALF
/FULL#
VCC50
TX
A+
GN
D
D0
D1
D2
D3
D4
D5
D6
D7
CS#
TEST2
POW
ERSAVE
XT
A
L1
XT
A
L2
IOW
#
IO
R
#
NC
I/M
#
R
E
SET
AC
P
R_E
N
TXA-
NC
RXA+
RXA-
C1+
C1-
NC
VCC33
ORDERING INFORMATION
PART NUMBER
PACKAGE
OPERATING TEMPERATURE RANGE
DEVICE STATUS
XR19L400IL40
40-pin QFN
-40°C to +85°C
Active
XR19L400
2
SINGLE CHANNEL INTEGRATED UART AND RS-485 TRANSCEIVER
REV. 1.0.3