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參數(shù)資料
| 型號： | UPD1723GF-013 |
| 廠商： | NEC Corp. |
| 英文描述： | PLL FREQUENCY SYNTHESIZER AND CONTROLLER FOR FM/MW/LF TUNER CAR AUDIO |
| 中文描述： | 鎖相環(huán)頻率合成器和控制器的調(diào)頻/中波/低頻調(diào)諧器汽車音響 |
| 文件頁數(shù)： | 5/80頁 |
| 文件大?。?/td> | 1590K |
| 代理商： | UPD1723GF-013 |
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5
μ
PD1723GF-013,
μ
PD1723GF-213
PIN DESCRIPTIONS
OUTPUT
TYPE
This pin is not connected to the internal chip. There-
fore, leave it open or connect it to GND, V
DD
, etc.
PLL (Phase Locked Loop) error output pins.
When the frequency obtained by dividing the local
oscillation frequency (VCO output) is higher than the
reference frequency, High level is output from these
pins. When it is lower than the reference frequency,
Low level is output from these pins. When the two fre-
quencies are the same, these pins are floated.
This output is input to an external LPF (Low Pass Filter)
and is applied to a varactor diode through the LPF. EO
1
and EO
2
output the same waveform so that the pin to
be used can be freely selected. When the radio is OFF,
these pins are floated.
Device power supply input pin.
This pin supplies 5 V
±
10 % power voltage during
device operation (radio, tape, and CD modes). When
the diode matrix NOCLK switch is 1 (shorted by diode),
when the CE pin (pin 7) is made Low level, this pin
drops to 2.5 V and data hold is enabled. When a voltage
of 0
→
4.5 V is supplied to this pin, the data is initialized.
Supply 0
→
4.5 V to this pin within 500 ms.
Always connect pins 4 and 8 to the same potential. V
DD1
(pin 4) is the analog system (PLL, A/D converter, INT,
CE) power supply and V
DD2
(pin 8) is the digital system
(CPU, LCD driver, IF counter) power supply.
The AM (MW and LW band) local oscillation output
(VCO output) is input to this pin. When the radio is
turned on and the MW or LW band is received, this pin
becomes active. Otherwise, it is pulled down
internally.
The input amplitude is 0.3 V
P-P
MIN.
Since there is an on-chip AC amplifier, block the DC
component with a capacitor.
DESCRIPTION
PIN NAME
SYMBOL
PIN No.
AM
AM local
oscillation
input
5
No
connection
NC
1
2
3
EO
1
EO
2
4
8
Power
supply input
V
DD1
V
DD2
—
CMOS
3-state
—
Input
Error out
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| UPD1723GF-211-3KE | 制造商:NEC 制造商全稱:NEC 功能描述:PLL FREQUENCY SYNTHESIZER AND CONTROLLER FOR FM/MW/LF TUNER CAR AUDIO |
| UPD1723GF-213 | 制造商:NEC 制造商全稱:NEC 功能描述:PLL FREQUENCY SYNTHESIZER AND CONTROLLER FOR FM/MW/LF TUNER CAR AUDIO |
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