tda8044h NXP Semiconductors, tda8044h Datasheet - Page 9

• Manufacturer Part Number: tda8044h
• Description: Satellite Demodulator And Decoder
• Manufacturer: NXP Semiconductors

Philips Semiconductors
Pin compatibility
The TDA8044 is backwards pin compatible with the TDA8043, this means that the functional pins of the TDA8043 have
been left unchanged on the TDA8044. However due to extra functionality of the TDA8044, some of the not connected
pins of the TDA8043 have become functional pins on the TDA8044. Table 1 lists the modified pins of the TDA8044.
Table 1 Modified pins of the TDA8044
If it is required to replace the TDA8043 with the TDA8044 and the pins with extra functionality are not required, then the
following measures on the PCB layout must be taken to avoid I/O conflicts in the TDA8044:
With these measures it is possible to use the TDA8043 and the TDA8044 on the same PCB without any problems.
In order to use pins with the extra functionality of the TDA8044, PCB layout changes are necessary.
2000 Feb 21
PIN
Pin numbers 4, 5, 26, 27, 36, 37, 47, 65, 92, 93 and 95 must be put to ground
Pin numbers 39, 64 and 91 must be left not connected.
Satellite demodulator and decoder
26
27
36
37
39
47
64
65
91
92
93
95
4
5
not connected
not connected
not connected
not connected
not connected
not connected
not connected
not connected
not connected
not connected
not connected
not connected
not connected
not connected
TDA8043 FUNCTION
CFS
V
P5
P4
V
V
POR
V
SCLT
SDAT
D22
V
V
V
SSD2
SSD6
SSD7
SSD9
SSD15
SSD16
SSD(test)
TDA8044 SYMBOL
9
clock frequency selection
digital ground
I/O expander bit 5
I/O expander bit 4
digital ground
digital ground
Power-on reset
digital ground
serial clock of I
serial data of I
22 kHz generation output
digital ground
digital ground
test pin, connect to ground
TDA8044 FUNCTION
2
2
Product specification
C-bus loop-through
C-bus loop-through
TDA8044