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Ordering number: EN 1511B
CMOS IC
LC7267
Digital Display of Clock/Receiving Frequency for Radio Set Applications
Functions
Package Dimensions
unit : mm
. Capable of selecting receiving frequency display/time . display. of receiving frequency at each band of FM/MW/LW Display
Display element: LED Static/dynamic: Static Withstand voltage at output pin: 15 V Maximum current: 18 mA (VDD = 6.0 to 10.0 V)
3025B-DIP42S
[LC7267]
. Number of display digits: FM: digits, MW, LW: 4 digits . Covers 5intermediate frequencies shown below.
FM: MW, LW:
+10.700, +10.725, +10.750, +10.675 MHz -10.700, -10.725, -10.675, -10.650 MHz +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
SANYO : DIP42S
. In FM reception applications, the LB3500 (/8 prescaler) is jointly. . used selections of display system (12-hour system with PM Two . sign, 24-hour system). time signal. set time by the . Easy topin for inhibiting time setting with display unlighted. Inhibit . 7.2 MHz crystal oscillator for reference frequency. . Supply voltage V : 4.5 to 10.0 V.
DD
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
LC7267
Specifications
Absolute Maximum Ratings at VSS = 0 V
Parameter Maximum supply voltage Input voltage Output voltage Allowable power dissipation Allowable power dissipation of segment outputs Symbol VDD max VIN VO1 VO2 Pd max Pd seg 1 Pd seg 2 Pd seg 3 Pd seg 4 Pd seg 5 Pd seg 6 Operating temperature Storage temperature Topr Tstg XOUT Output pins other than XOUT, output : off Ta % 65C PM VDD = 4.5 to 6 V, IOL = 50 mA b&e VDD = 4.5 to 6 V, IOL = 33 mA Other outputs VDD = 4.5 to 6.5 V, IOL = 16.5 mA PM VDD = 6.0 to 10 V, IOL = 54 mA b&e VDD = 6.0 to 10 V, IOL = 36 mA Other outputs VDD = 6.0 to 10 V, IOL = 18 mA Conditions Ratings -0.3 to +11 -0.3 to VDD+0.3 -0.3 to VDD+0.3 0 to 15 550 35 30 15 38 25 13 -30 to +65 -40 to +125 Unit V V V V mW mW mW mW mW mW mW C C
Allowable Operating Conditions at Ta = 25C, VSS = 0 V, VDD = 4.5 to 10 V
Parameter Supply voltage Symbol VDD VIH1 VIH2 VIH3 VIL1 VIL2 VIL3 Input medium-level voltage Input frequency VIM fIN1 fIN2 fIN3 VIN1 Input amplitude VIN2 VIN3 Segment current Iseg 1 Iseg 2 Iseg 3 Conditions INHI, CTR/CLK, DEMAND SET, FM/AM FIF1, FIF2, FIF3 AIF1, AIF2, 12H/24H INHI, CTR/CLK, DEMAND SET, FM/AM FIF1, FIF2, FIF3 AIF1, AIF2, 12H/24H SET FMI, sine wave, capacitive coupling, VIN1 = 0.7Vp-p AMI, sine wave, capacitive coupling, VIN2 = 0.5Vp-p XIN, sine wave, capacitive coupling, VIN3 = 1Vp-p FMI, sine wave, capacitive coupling, fIN1 = 1 to 18 MHz AMI, sine wave, capacitive coupling, fIN2 = 0.5 to 3 MHz XIN, sine wave, capacitive coupling, fIN3 = 0.2 to 7.5 MHz PM b&e Other outputs seg min 4.5 0.8VDD 0.85VDD 0.9VDD 0 0 0 0.45VDD 1 0.5 0.2 0.7 0.5 1.0 typ max 10 VDD VDD VDD 0.2VDD 0.15VDD 0.1VDD 0.55VDD 18 3 7.5 0.9VDD 0.9VDD 0.9VDD 45 30 15 Unit V V V V V V V V MHz MHz MHz Vp-p Vp-p Vp-p mA mA mA
Input high-level voltage
Input low-level voltage
Electrical Characteristics at VDD = 4.5 to 10 V, VSS = 0 V
Parameter Symbol IIH1 Input high-level current IIH2 IIH3 IIL VIF1 VIF2 Conditions FIF1 to FIF3, AIF1 to AIF2, SET, FM/AM, 12H/24H CTR/CLK, VI = VDD INHI, VI = VSS DEMAND, VI = VDD FIF1 to FIF3, AIF1 to AIF2, SET, FM/AM, 12H/24H, CTR/CLK, VI = VSS INHI, VI = open DEMAND, VI = open min 0 40 40 -10 0 0 typ max 10 1000 1000 0 0.2 0.1VDD Unit A A A A V V
Input low-level current Input floating voltage
Continued next page. No. 1511- 2/10
LC7267
Continued from preceding page.
Parameter Output low-level voltage Output off leakage current Symbol VOL1 VOL2 VOL3 IOFF Conditions PM VDD = 4.5 to 10 V, IOL = 45 mA b&e VDD = 4.5 to 10 V, IOL = 30 mA Other outputs seg, VDD = 4.5 to 10 V, IOL = 15 mA All segments output pins, VOUT = 13 V FM mode, FM/AM = VDD, fIN1 = 18 MHz, 0.7Vp-p (or AM mode, FM/AM = VSS, fIN2 = 3 MHz, 0.5Vp-p) fIN3 = 7.2 MHz, 1Vp-p, FIF1, FIF2, FIF3 = VDD AIF1, AIF2 = VDD 12H/24H, CTR/CLK, INHI, DEMAND = VDD min 0 0 0 0 typ max 1.0 1.0 1.0 10 Unit V V V A
Current drain
IDD
18
mA
Pin Assignment
Configuration and Display Font
4 or 4-1/2-digit segment LED's are used to display time and frequency in the display font shown below. Font
Lighting System
Static lighting
Display Range
. Frequency (MW, LW) . Frequency (FM) . Clock (12-hour) . Clock (24-hour)
Pin Description
000 kHz to 1999 kHz (The highest-order digit ``0'' is blanked out.) 00.00 MHz to 199.95 MHz (The highest-order digit ``0'' is blanked out.) PM 12:00 to PM 11:59 12:00 to 11:59 0:00 to 23:59 (The highest-order digit ``0'' is blanked out.)
. a to g, PM, b&e: LED driver pin
No. 1511- 3/10
LC7267
.V .X
DD, IN,
VSS: XOUT:
Power supply pin Crystal oscillator, input amplifier pin
Crystal oscillator
Input amplifier
. FIF1, FIF2, FIF3: FM IF offset value select pin
FIF1 FIF2 FIF3 IF (MHz) 0 0 0 +10.700 0 0 1 +10.725 0 1 0 +10.675 0 1 1 +10.750 1 0 0 -10.700 1 0 1 -10.725 1 1 0 -10.675 1 1 1 -10.650
. AIF1, AIF2: AM IF offset value select pin
AIF1 AIF2 IF (kHz) Display step 0 1 +450 (1) 10 kHz 0 0 +450 (2) 1 0 +455 1 kHz step 1 1 +469 1: High level 0: Low level
(Note) 450 kHz (1): 10 kHz-step display, others: 1 kHz-step display
. FMI, AMI: . FM/AM:
Local OSC signal input pin FMI: For FM AMI: For MW, LW FM/MW, LW select pin FM: High level MW, LW: Low level CTR (Counter): High level CLK (Clock): Low level
. CTR/CLK: Frequency display/time display select pin . DEMAND: Input pin for instructing execution of setting
CTR/CLK 0 0 DEMAND 1 0 Time display mode MODE Mode of setting by the time signal and hours-minutes setting mode
. SET:
Input pin for setting hours-minutes
This pin is set at ``M'' level normally. The input signal of ``H''/``L'' level acts as follows: When in the mode of setting by the time signal and hours-minutes setting mode (CTR/CLK = ``L'', DEMAND = ``H'') High level: Execution of hours setting Advance at a 2 Hz rate 1.2 seconds after the pin is set to ``H'' level. Low level: Execution of setting by the time signal and minutes setting Advance at a 2 Hz rate 1.2 seconds after the pin is set to ``L'' level. Setting by the time signal is executed when the pin is set off within 1.0 second after set to ``L'' level. No carry to high-order digit occurs.
. INHI: . 12H/24H:
Input pin for turning OFF the segment pins, inhibiting the SET/DEMAND pin from functioning, and preventing the AMI amp from operating High level: Normal operation Low level: Segment pin OFF, SET/DEMAND pin function inhibit Input pin for selecting 12-hour system with PM sign/24-hour system High level: 12-hour system with PM sign Low level: 24-hour system No. 1511- 4/10
LC7267
Make connection of the highest-order digit as shown below. 12-hour system 24-hour system
Timing Chart
Time setting (CTR/CLK = ``L'')
DEMAND pin Setting by the time signal and minutes setting SET pin
Flashing (2Hz) for setting by the time signal Mode of setting by the time signal Execution of counting 30min. or more as 1hr. and disregarding 29min. or less 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 Hours setting and minutes setting
Flashing (2 Hz) for setting by the time signal Hours-minutes setting mode
Flashing stop
Flashing (2 Hz) for setting by the time signal
Hours-minutes setting mode Flashing stop
SET pin (Hours setting) 1.2s
Execution of hours setting (Advance at a 2 Hz rate)
1.2s
t: Approximately 100 ms.
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 PM sign 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). Flashing at a 2 Hz rate
Hours-minutes display: Display of PM 12:34
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). PM sign
Hours-minutes setting: Setting to PM 11:45 from PM 11:23
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
Flashing 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
LC7267
Equivalent Circuit Block Diagram
No. 1511- 6/10
Surge voltage eliminator
5-digit display in FM use
LED display tube (anode common)
Sample Application Circuit 1
AM local
Interface
FM/AM display select SW 1/8 prescaler LB3500
FM local
Interface
LC7267
Hoursminutes setting SW
*: Ceramic capacitor (Must be mounted as close to each pin as possible.)
No. 1511- 7/10
4-digit display in FM use
Surge voltage eliminator
Reference: LED display tube (For details, see LED catalog.)
Sample Application Circuit 2
LED display tube (anode common)
AM local Interface
FM/AM display select SW
Interface
(Note) How to reduce current dissipation when display is turned off
1/8 prescaler LB3500
Hoursminutes setting SW
FM local
LC7267
To reduce current dissipation when display is turned off (INHI: ``L''), the circuit shown below must be connected to the FMI pin.
*: Ceramic capacitor (Must be mounted as close to each pin as possible.)
No. 1511- 8/10
LC7267
IDD - VDD For FMI input: 18 MHz, 0.7 Vp-p FM/AM = ``H'' For AMI input: 3 MHz, 0.5 Vp-p FM/AM = ``L'' Common conditions 12H/24H, CTR/CLK, INHI, DEMAND = VDD FIF1, FIF2, FIF3 = VDD AIF1, AIF2 = VDD For FMI input
For AMI input
Current drain, IDD - mA
Current drain, IDD - mA
IDD - Ta For FMI input: 18 MHz, 0.7 Vp-p FM/AM = ``H'' For AMI input: 3 MHz, 0.5 Vp-p FM/AM = ``L'' Common conditions FIF1, FIF2, FIF3 = VDD AIF1, AIF2 = VDD 12H/24H, CTR/CLK, INHI, DEMAND = VDD
For FMI input For AMI input
Supply voltage, VDD - V Vp-p - fI1
Ambient temperature, Ta - C Vp-p - fI2
Input amplitude, Vp-p -
FMI input frequency, fI1 - Hz VDD - fI1
FM/AM = VDD Upper standard value VDD = 15 V or more
Input amplitude, Vp-p -
AMI input frequency, fI2 - Hz VDD - fI2
Supply voltage, VDD - V
Supply voltage, VDD - V
Upper standard value
Lower standard value
FMI input frequency, fI1 - Hz Vt - VDD INHI threshold voltage, Vt - V SET threshold voltage, Vt - V
AMI Input Frequency, fI2 - Hz Vt - VDD
High-level threshold voltage Upper standard value
Lower standard value Low-level threshold voltage
Supply voltage, VDD - V
Supply Voltage, VDD-V No. 1511- 9/10
LC7267
IOL - VOL Output impedance, ROUT -
Segment outputs other than PM, 5b&e This data is in case of flowing current to one segment only.
ROUT - VDD
Output current, IOL - mA
Segment output (IOL = 30 mA) of 5b&e
Segment outputs (IOL = 15 mA) other than PM, 5b&e
Segment output (IOL = 45 mA) of PM
Output voltage, VOL - V
Supply voltage , VDD - V
No products described or contained herein are intended for use in surgical implants, life-support systems, aerospace equipment, nuclear power control systems, vehicles, disaster/crime-prevention equipment and the like, the failure of which may directly or indirectly cause injury, death or property loss. Anyone purchasing any products described or contained herein for an above-mentioned use shall: 1 Accept full responsibility and indemnify and defend SANYO ELECTRIC CO., LTD., its affiliates, subsidiaries and distributors and all their officers and employees, jointly and severally, against any and all claims and litigation and all damages, cost and expenses associated with such use: 2 Not impose any responsibility for any fault or negligence which may be cited in any such claim or litigation on SANYO ELECTRIC CO., LTD., its affiliates, subsidiaries and distributors or any of their officers and employees jointly or severally. Information (including circuit diagrams and circuit parameters) herein is for example only; it is not guaranteed for volume production. SANYO believes information herein is accurate and reliable, but no guarantees are made or implied regarding its use or any infringements of intellectual property rights or other rights of third parties. This catalog provides information as of June, 1998. Specifications and information herein are subject to change without notice.
PS No. 1511- 10/10

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