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參數(shù)資料
| 型號(hào)： | U4488B |
| 英文描述： | Quasi-Split Sound Circuit and AM Demodulator |
| 中文描述： | 準(zhǔn)分離聲音電路和AM解調(diào)器 |
| 文件頁數(shù)： | 3/9頁 |
| 文件大?。?/td> | 272K |
| 代理商： | U4488B |
U4488B
Preliminary Information
TELEFUNKEN Semiconductors
Rev. A2, 15-Jan-98
3 (9)
Pin Description
Pin
Symbol
Function
1, 2
Vi1, IF
IF input 1 (symmetrical)
3
CAGC
Capacitor for AGC time constant
4
CREF
Capacitor for internal reference
voltage
5
LF
Loop filter
6
Vo,AM
AF output (AM sound)
7
Vsw,AGC
Standard switch
8, 9
VVCO
VCO circuit
10
Vsw,mute
Mute switch
11
Vsw, IF
IF input switch IF1 / IF2
12
Vo,FM
Intercarrier output (FM sound)
13
GND
Ground
14
VS
Supply voltage (5 V)
15, 16
Vi2, IF
IF input 2 (symmetrical)
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
U4488B
V
i1,IF
V
i1,IF
C
AGC
C
REF
LF
V
o,AM
V
sw,AGC
V
VCO
V
S
GND
V
o,FM
V
sw,mute
V
VCO
13791
V
i2,IF
V
i2,IF
V
sw,IF
Figure 2. Pinning
Absolute Maximum Ratings
Reference point Pin 13, unless otherwise specified
Parameters
Symbol
Value
Unit
Supply voltage range
Pin 14
VS
4.5 to 9.0
V
Supply current
Pin 14
IS
55
mA
Power dissipation (VS = 9 V)
P
500
mW
Output currents
Pins 6 and 12
Iout
5
mA
External voltages
Pins 1, 2, 3, 4, 6, 12, 15 and 16
+ 4.5
V
Pins 5, 8 and 9
Vext
+ 3.5
V
Pins 7, 10 and 11
VS
V
Junction temperature
Tj
+125
°C
Operating temperature range
Tamb
0 to +85
°C
Storage temperature
Tstg
–25 to +125
°C
Electrostatic handling *
all pins
VESD
" 300
V
*) Equivalent to discharging a 200-pF capacitor through a 0-
W resistor
Thermal Resistance
Parameters
Symbol
Value
Unit
Junction ambient when soldered to PCB
RthJA
60
K/W
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