lc7265 Sanyo Semiconductor Corporation, lc7265 Datasheet - Page 4

• Manufacturer Part Number: lc7265
• Description: Received Frequency Display For Radio Receivers
• Manufacturer: Sanyo Semiconductor Corporation

2-4
2-5
(Note) 450 kHz(1) : 10 kHz step display, others : 1 kHz step display
2-6
2-7
2-8
2-9
2-10
.
.
.
.
.
.
.
AIF1, AIF2 : AM IF select pins
A/F : FM/MW, LW select pin
FIF1, FIF2, FIF3 : FM IF select pins
HLD : Display contents hold pin
Normally, this pin is set at high level. To hold display contents, this pin is set at low level. Connecting time constant circuit
to this pin makes it possible to hold display contents for a certain period of time at the time of FM/MW, LW band
selection.
BLK : Display blanking pin
FMI, AMI : Local oscillation signal input pins
FMI — For FM
AMI — For MW, LW : 1.0Vp-p input sensitivity (V
FM
MW, LW — Low level
50 Hz : 50 Hz time base output pin
IF (MHz)
IF (kHz)
AIF1
AIF2
FIF1
FIF2
FIF3
— Pin open or high level
Example of blanking misdisplay
at the time of application of power.
+450 (2)
+10.700
0
0
0
0
0
: 0.7Vp-p input sensitivity
0.5Vp-p input sensitivity (other than above)
+450 (1)
+10.725
0
0
1
0
1
Internal clock
+10.675
+455
0
1
0
1
0
A/F
HLD
DD
LC7265
= 8 to 10 V, f
+10.750
+469
0
1
1
1
1
Display contents hold
IN
Depending on C, R
= 0.5 to 0.9 MHz)
–10.700
1 : High level (V
0 : Low level (V
1
0
0
–10.725
1
0
1
SS
DD
)
)
Threshold
voltage of
–10.675
1
1
0
e
No.1197-4/6
–10.650
1
1
1