Texas Instruments DAC8728EVM, User Manual, Page: 10 / 21

CS
CS
LDAC
LDAC
R/W
R/W
A0
A1
A2
A4
A3
29
21
20
27
26
57
18
58
DAC8728PAG
3D
18
2D
16
1D
14
4D
20
5D
22
6D
24
7D
26
8D
28
OE
32
CLK
30
2Q
17
1Q
15
VCC
13
3Q
19
4Q
21
5Q
23
6Q
25
7Q
27
GND
31
8Q
29
2
4
6
8
12
10
1
3
5
7
11
9
10
15
12
19
16
9
6
5
SN74LV374A
Parallel Data
20
2
1
17
14
11
18
13
8
7
3
4
LATCH
CE
IOVDD
U11
J6
Parallel Control
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4.11 Parallel Data
The DAC8728EVM uses Samtec part numbers SSW-116-22-S-D-VS and TSM-116-01-T-DV to provide a
convenient, 16-pin, dual row header/socket combination at J6. This header/socket combination provides
access to the parallel data pins of the DAC8728 and the inputs to the SN74LVC374. Data lines D0 to D15
are located on the odd numbered pins 1 through 31 on the J6 header. Even pin numbers 2 to 32 are
connected to digital ground. Additionally, data lines D0 to D4 are shared between the DAC8728 and the
SN74LVC374; this configuration can be seen in
Figure 4 .
Figure 4. Shared 16-Bit Parallel Bus
10 DAC8728EVM SBAU161 – February 2010
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