SANYO LC7267 Datasheet

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

(V

= 6.0 to 10.0 V)

DD

.

Number of display digits:

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

LC7267

Specifications

Absolute Maximum Ratings at VSS=0V

Parameter Symbol Conditions Ratings Unit
Maximum supply voltage V
Input voltage V
Output voltage V

Allowable power
dissipation

Allowable power
dissipation of segment
outputs

Operating temperature Topr –30 to +65 °C
Storage temperature Tstg –40 to +125 °C

max –0.3 to +11 V

DD

IN

1X

O

V

2 Output pins other than X

O

OUT

, output : off 0 to 15 V

OUT

–0.3 to VDD+0.3 V
–0.3 to VDD+0.3 V

Pd max Ta % 65°C 550 mW

Pd seg 1 PM V
Pd seg 2 b&e V
Pd seg 3 Other outputs V

I

OL

Pd seg 4 PM V
Pd seg 5 b&e V
Pd seg 6 Other outputs V

I

OL

= 4.5 to 6 V,IOL=50mA 35 mW

DD

= 4.5 to 6 V,IOL=33mA 30 mW

DD

= 4.5 to 6.5 V,

= 16.5 mA

DD

DD

=18mA

DD

= 6.0 to 10 V,IOL=54mA 38 mW

= 6.0 to 10 V,IOL=36mA 25 mW

= 6.0 to 10 V,

DD

15 mW

13 mW

Allowable Operating Conditions at Ta = 25°C, VSS=0V,VDD= 4.5 to 10 V

Parameter Symbol Conditions min typ max Unit

Supply voltage V

Input high-level voltage

Input low-level voltage

Input medium-level
voltage

Input frequency

Input amplitude

Segment current

DD

1 INHI, CTR/CLK, DEMAND 0.8V

V

IH

V

2 SET, FM/AM 0.85V

IH

V
V

V
V

V
f

f
f

V

V

V

FIF1, FIF2, FIF3

3

IH

AIF1, AIF2, 12H/24H

1 INHI, CTR/CLK, DEMAND 0 0.2V

IL

2 SET, FM/AM 0 0.15V

IL

FIF1, FIF2, FIF3

3

IL

AIF1, AIF2, 12H/24H
SET 0.45V

IM

1 FMI, sine wave, capacitive coupling, VIN1 = 0.7Vp-p 1 18 MHz

IN

2 AMI, sine wave, capacitive coupling, VIN2 = 0.5Vp-p 0.5 3 MHz

IN

3 XIN, sine wave, capacitive coupling, VIN3 = 1Vp-p 0.2 7.5 MHz

IN

FMI, sine wave, capacitive coupling,

1

IN

f

1=1to18MHz

IN

AMI, sine wave, capacitive coupling,

2

IN

f

2 = 0.5 to 3 MHz

IN

XIN, sine wave, capacitive coupling,

3

IN

f

3 = 0.2 to 7.5 MHz

IN

0.9V

Iseg 1 PM
Iseg 2 b&e
Iseg 3 Other outputs seg 15 mA

4.5 10 V

0.55V

V

DD

V

DD

V

DD
DD

DD
DD

DD

Vp-p

DD

Vp-p

DD

Vp-p

DD

DD
DD

DD

0 0.1V

DD

0.7 0.9V

0.5 0.9V

1.0 0.9V
45 mA

30 mA

V
V

V
V

V
V

V

Electrical Characteristics at VDD= 4.5 to 10 V, VSS=0V

Parameter Symbol Conditions min typ max Unit

FIF1 to FIF3, AIF1 to AIF2, SET, FM/AM, 12H/24H

1

I

IH

Input high-level current

Input low-level current I

Input floating voltage

CTR/CLK, V

I

2 INHI, VI=V

IH

I

3 DEMAND, VI=V

IH

FIF1 to FIF3, AIF1 to AIF2, SET, FM/AM, 12H/24H,

IL

CTR/CLK, V

V

1 INHI, VI= open 0 0.2 V

IF

V

2 DEMAND, VI= open 0 0.1V

IF

I=VDD

SS

DD

I=VSS

010µA

40 1000 µA
40 1000 µA

–10 0 µA

V

DD

Continued next page.

No. 1511- 2/10

Continued from preceding page.

Parameter Symbol Conditions min typ max Unit

Output low-level voltage

Output off leakage current I

Current drain I

Pin Assignment

LC7267

V

1PMVDD= 4.5 to 10 V, IOL=45mA 0 1.0 V

OL

V

2 b&e VDD= 4.5 to 10 V, IOL=30mA 0 1.0 V

OL

V

3 Other outputs seg, VDD= 4.5 to 10 V, IOL=15mA 0 1.0 V

OL

OFF

DD

All segments output pins, V
FM mode, FM/AM = VDD,fIN1 = 18 MHz, 0.7Vp-p

(or AM mode, FM/AM = V
f

3 = 7.2 MHz, 1Vp-p,

IN

FIF1, FIF2, FIF3 = V
AIF1, AIF2 = V
12H/24H, CTR/CLK, INHI, DEMAND = V

DD

DD

=13V 0 10 µA

OUT

2 = 3 MHz, 0.5Vp-p)

SS,fIN

DD

18 mA

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) 000 kHz to 1999 kHz (The highest-order digit ‘‘0’’ is blanked out.)

.

Frequency (FM) 00.00 MHz to 199.95 MHz (The highest-order digit ‘‘0’’ is blanked out.)

.

Clock (12-hour) PM 12:00 to PM 11:59 → 12:00 to 11:59

↑

.

Clock (24-hour) 0:00 to 23:59 (The highest-order digit ‘‘0’’ is blanked out.)

Pin Description

.

a to g, PM, b&e: LED driver pin

No. 1511- 3/10