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參數(shù)資料
| 型號： | TDA1581T |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 消費(fèi)家電 |
| 英文描述： | Decoder for traffic warning VWF radio transmissions |
| 中文描述： | SPECIALTY CONSUMER CIRCUIT, PDSO20 |
| 封裝： | PLASTIC, SO-20 |
| 文件頁數(shù)： | 7/14頁 |
| 文件大?。?/td> | 115K |
| 代理商： | TDA1581T |
March 1992
7
Philips Semiconductors
Preliminary specification
Decoder for traffic warning (VWF) radio
transmissions
TDA1581T
APPLICATION INFORMATION
(see Fig.3)
Notes to the application information
1.
Sequence for measuring switch-on delay times (t
don
)
a) Nominal BK or DK input signal at pin 15: V
i(p-p)
= 8 mV; f = 57 kHz; modulation-on.
b) Pin 4 of the BK detector (pin 18 of the DK detector) is switched to ground to cause a low signal at the SK output
at pin 3 (DK output at pin 2).
c) t
don
commences when the ground connection is removed from pin 4 (pin 18) as the positive-going V
oBK
signal at
pin 5 (V
oDK
signal at pin 17) crosses zero.
t
don
ends when the positive-going edge of the SK output arrives at pin 15 (DK at pin 2).
2.
Sequence for measuring switch-off delay times (t
doff
)
a) Nominal operating conditions as in note 1.
b) t
doff
commences when the input is switched off as the negative-going V
oBK
signal at pin 5 (V
oDK
signal at pin 17)
crosses zero.
t
doff
ends when the negative-going edge of the SK output arrives at pin 3 (DK at pin 2).
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
4.0
UNIT
V
iSKon
m
BKon
m
m
BKoff
SK switch-on threshold level
SK switch-on threshold level
SK switch hysteresis
m
BK
= 60 %
V
iSK
= 8 mV
3.0
1.8
32
3.5
mV
%
dB
t
dSKon
t
dSKoff
V
iDKon
m
DKon
m
DKoff
SK switch-on delay
SK switch-off delay
DK switch-on threshold level
DK switch-on threshold level
DK switch hysteresis
note 1
note 2
m
DK
= 30 %
V
iDK
= 8 mV
380
3.1
95
500
1.5
13
3.6
200
700
4.1
ms
ms
mV
%
dB
t
dDKon
t
dDKoff
DK switch-on delay
DK switch-off delay
note 1
note 2
600
750
750
1000
1000
ms
ms
-----------------
m
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