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PDF LC7267 Data sheet ( Hoja de datos )
| Número de pieza | LC7267 | |
| Descripción | Digital Display of Clock/Receiving Frequency for Radio Set Applications | |
| Fabricantes | Sanyo Semicon Device | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de LC7267 (archivo pdf) en la parte inferior de esta página. Total 10 Páginas | ||
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Ordering number: EN 1511B
CMOS IC
LC7267
Digital Display of Clock/Receiving Frequency
for Radio Set Applications
Functions
. Capable of selecting receiving frequency display/time
. display.
Display of receiving frequency at each band of FM/MW/LW
Display element:
LED
Static/dynamic:
Static
Withstand voltage at output pin: 15 V
Maximum current:
18 mA
. Number of display digits:
(VDD = 6.0 to 10.0 V)
. FM: 5 digits, MW, LW: 4 digits
Covers intermediate frequencies shown below.
FM: +10.700, +10.725, +10.750, +10.675 MHz
–10.700, –10.725, –10.675, –10.650 MHz
MW, LW: +450 kHz (1) : 10 kHz-step display
+450 kHz (2) : 1 kHz-step display
+455 kHz : 1 kHz-step display
+469 kHz : 1 kHz-step display
. In FM reception applications, the LB3500 (÷8 prescaler) is
. used jointly.
Two selections of display system (12-hour system with PM
sign, 24-hour system).
. Easy to set time by the time signal.
. Inhibit pin for inhibiting time setting with display unlighted.
. 7.2 MHz crystal oscillator for reference frequency.
. Supply voltage VDD: 4.5 to 10.0 V.
Package Dimensions
unit : mm
3025B-DIP42S
[LC7267]
SANYO : DIP42S
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
63098HA (II) No.1511 - 1/10
1 page  
LC7267
Make connection of the highest-order digit as shown below.
12-hour system
24-hour system
Timing Chart
Time setting (CTR/CLK = ‘‘L’’)
Setting by the
time signal and
minutes setting
Hours setting
and minutes
setting
DEMAND pin
Flashing (2Hz) for setting by
the time signal
Mode of setting by
Execution of counting the time signal
30min. or more as 1hr.
and disregarding 29min. or less
SET pin
1.2 s. or more
Flashing stop
Hours-minutes
setting mode
Minutes
advance at
a 2 Hz rate
Hours-minutes
display
Within 1.0 s.
Hours-minutes display
DEMAND pin
Flashing (2 Hz)
for setting by
the time signal
SET pin
(Hours setting)
Hours-minutes
setting mode
Flashing stop
1.2s
Execution of hours
setting
(Advance at a 2 Hz rate)
t: Approximately 100 ms.
Flashing (2 Hz)
for setting by
the time signal
Hours-minutes
setting mode
Flashing stop
1.2s
Execution of minutes
setting
(Advance at a 2 Hz rate)
Sample Display at Each Display
(Setting by the time signal, hours-minutes display, hours-minutes setting)
Setting by the time signal: Setting to PM 12:00
Execute setting by
the time signal with
the SET pin.
Flashing at a 2 Hz rate when in
the mode of setting by the time
signal
When setting by the time signal is
executed, minutes become 00. If the
minutes display is at 30 to 59, hours are
incremented by 1 (counting 30 or more
as 1 hr. and disregarding 29 or less).
PM Flashing at a 2 Hz rate
sign
Hours-minutes display: Display of PM 12:34
PM sign
The PM sign flashes in the afternoon when in the mode of
setting by the time signal, hours-minutes display,
hours-minutes setting.
(for 12-hour system).
Hours-minutes setting: Setting to PM 11:45 from PM 11:23
PM sign
Flashing at
a 2 Hz rate
Set the SET pin to
VDD or VSS. After
lapse of 1.2 s,
flashing stops and
hours or minutes
advance at a 2 Hz
rate.
PM
sign
Set the SET pin to VSS, and
setting is executed.
Set the SET pin to VDD, and
setting is executed.
No. 1511- 5/10
5 Page | ||
| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet LC7267.PDF ] | |
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