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參數資料
| 型號： | U4090B-N |
| 英文描述： | Low power dual voltage comparators |
| 中文描述： | U4090B氮[更新9 / 03。 34頁] |
| 文件頁數： | 17/34頁 |
| 文件大小： | 622K |
| 代理商： | U4090B-N |
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17
U4090B-N
4740A–CORD–09/03
U4090B-N Control
Input voltage
Input high
V
MUTX
V
MP
-
0.3 V
V
Input low
V
MUTX
0.3
V
Line Detection
Line current for LIDET active
Line current for LIDET inactive
Current threshold during power down
PD = inactive
PD = inactive
V
B
= 5 V, PD = active
ILON
ILOFF
ILONPD
12.6
11.0
1.6
mA
mA
mA
0.8
2.4
Electrical Characteristics (Continued)
f = 1 kHz, 0 dBm = 775 mV
rms
, I
M
= 0.3 mA, I
MP
= 2 mA, RDC = 130 k , T
amb
= 25°C, RGSA = 560 k ,
Z
ear
= 68 nF + 100 , Z
M
= 68 nF, pin 31 open, V
IMPSEL
= GND, V
MUTX
= GND, V
MUTR
= GND, unless otherwise specified.
Parameters
Test Conditions
Symbol
Min.
Typ.
Max.
Unit
Table 1.
Selection of TX Mute and Line Impedance
Logic Level IMPSEL
MODE
0
Line impedance = 600
TXA = on
ES = off
Line impedance = 600
TXA = off
ES = on
Line impedance = 900
TXA = off
ES = on
Line impedance = 900
TXA = on
ES = off
Speech
0 to Z
Transmit-mute
1 to Z
Transmit-mute
1
Speech
Table 2.
Selection of Earpiece Mute and Answering Machine Mode
Logic Level
MUTR
RA2 = on
RECATT = on
STIS + STIL = on
RA2 = on
RECATT = off
STIS = on, STIL = off
RA2 = off
RECATT = off
STIS = on, STIL = off
AGA off for STIS
RA2 = off
RECATT = on
STIS + STIL = on
MODE
0
Speech
0 to Z
For answering machine
1 to Z
For answering machine
1
Speech + earpeace mute
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