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參數(shù)資料
| 型號： | TDA8741H-T |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 接收器 |
| 英文描述： | FM, AUDIO DEMODULATOR, PQFP44 |
| 文件頁數(shù)： | 5/24頁 |
| 文件大小： | 317K |
| 代理商： | TDA8741H-T |
October 1994
13
Philips Semiconductors
Product specication
Satellite sound circuit with noise reduction
TDA8741; TDA8741H
Notes to the AC characteristics
1. At pin 20 (16) the demodulated 1 kHz signal should be present with a typical level of 158 mV (RMS) (
16 dBV), and
THD of maximum 0.5%; VP = 8 to 13.2 V; Tamb = 20 to +70 °C.
2. Modulation of main channel is OFF; modulation of secondary channels is ON.
3. The electrolytic capacitors at pins 40 and 42 (36 and 38) are removed and 1500 pF capacitors between pin 40 (36)
and ground and between pin 42 (38) and ground are connected. At pins 40 and 42 (36 and 38) the demodulated
1 kHz signals should be present with typical levels of 9 mV (RMS) and THD of maximum 0.5%; VP = 8 to 3.2 V;
Tamb = 20 to +70 °C.
4. All PLLs locked; RS1 =RS2 = 0.68 k.
5. Modulation of secondary channel being measured and main channel is OFF; modulation of other secondary channel
is ON.
6. Modulation of main channel is ON; modulation of secondary channels is OFF.
7. Measured at pins 38 (34) (left) and 30 (26) (right) and no electrolytic capacitors connected to these pins.
Table 1
Truth table for output selection (note 1)
Note
1. X = don’t care.
SWITCH
POSITION
STATE
PIN 15 (10)
PIN 17 (13)
PIN 26 (22)
PIN 13 (8)
OUTSEL L
OUTSEL R
EXT/INT
MUTE
1
stereo
1100
2
left
1000
3
right
0100
4
main
0000
5
external
X
1
0
6
mute secondary
X
0
1
7
mute all
X
1
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| TDA8741NB | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:TV/Video Sound Circuit |
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| TDA8742H | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Satellite sound circuit with noise reduction |
| TDA8745 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Satellite sound receiver with I2C-bus control |
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