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參數(shù)資料
| 型號： | 935262794557 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 通信及網(wǎng)絡(luò) |
| 英文描述： | SPECIALTY TELECOM CIRCUIT, PQFP100 |
| 封裝： | PLASTIC, SOT-317, QFP-100 |
| 文件頁數(shù)： | 24/24頁 |
| 文件大?。?/td> | 134K |
| 代理商： | 935262794557 |
2000 Feb 21
9
Philips Semiconductors
Product specication
Satellite demodulator and decoder
TDA8044
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
Modied 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:
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.
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.
PIN
TDA8043 FUNCTION
TDA8044 SYMBOL
TDA8044 FUNCTION
4
not connected
CFS
clock frequency selection
5
not connected
VSSD2
digital ground
26
not connected
P5
I/O expander bit 5
27
not connected
P4
I/O expander bit 4
36
not connected
VSSD6
digital ground
37
not connected
VSSD7
digital ground
39
not connected
POR
Power-on reset
47
not connected
VSSD9
digital ground
64
not connected
SCLT
serial clock of I2C-bus loop-through
65
not connected
SDAT
serial data of I2C-bus loop-through
91
not connected
D22
22 kHz generation output
92
not connected
VSSD15
digital ground
93
not connected
VSSD16
digital ground
95
not connected
VSSD(test)
test pin, connect to ground
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