参数资料
型号: D1723GF
厂商: NEC Corp.
英文描述: PLL FREQUENCY SYNTHESIZER AND CONTROLLER FOR FM/MW/LF TUNER CAR AUDIO
中文描述: 锁相环频率合成器和控制器的调频/中波/低频调谐器汽车音响
文件页数: 14/80页
文件大小: 1590K
代理商: D1723GF
14
μ
PD1723GF-013,
μ
PD1723GF-213
PIN NAME
PIN No.
SYMBOL
Autotuning SD (Station Detector) signal input pin.
When the voltage shown below is applied to this pin
during the seek operation, a broadcast station is judged
to be present.
DESCRIPTION
OUTPUT
TYPE
LOCAL
Mode
SD Voltage
Band
28.5
64
12.5
64
15.5
64
12.5
64
×
V
DD
min.
×
V
DD
min.
×
V
DD
min.
×
V
DD
min.
FM
MW
LW
LOCAL
DX
LOCAL
DX
2.227
0.977
1.211
0.977
V
DD
= 5 V
In the auto preset memory mode, search is performed
twice in the LOCAL mode and once in the DX mode.
The voltage to determine the presence of a broadcast
station at this time is shown below.
LOCAL
Mode
SD Voltage
Band
3.477
2.227
0.977
V
DD
= 5 V
LOCAL
(1st time)
LOCAL
(2nd time)
44.5
64
28.5
64
12.5
64
×
V
DD
min.
×
V
DD
min.
×
V
DD
min.
DX
(3rd time)
1.445
1.211
0.977
LOCAL
(1st time)
LOCAL
(2nd time)
18.5
64
15.5
64
12.5
64
×
V
DD
min.
×
V
DD
min.
×
V
DD
min.
DX
(3rd time)
MW
LW
FM
LW
When using the IF count, a broadcast station is de-
tected when a broadcast station is judged to be pres-
ent by both IF and SD pins.
Radio mode “ST” (STEREO) display input pin.
When low level is input to this pin, the LCD panel “ST”
display lights. This pin is valid only on the FM and VF
bands.
In the MONO mode, “ST” is not displayed.
Input
64
ST
63
SD
SD input
Input
Stereo
signal
input
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