Sanyo LC7444 Specifications

CMOS LSI

Ordering number : EN4305A

52295TH (OT) No. 4305-1/3

SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters

TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN

Dual VCO

LC7444

Overview

The LC7444 consists of two independent VCO (voltage
controlled oscillator) circuits.
These circuits support VCO operation with only the
addition of external resistors that determine the oscillation
range.

Features

• Two independent VCO circuits

• The oscillator frequency range can be set with external
resistors.

• Good linearity in the voltage - frequency conversion
characteristics

• High-impedance oscillator control voltage input

• CMOS clock output

• Fabricated in a CMOS process for lower power

• Oscillator frequency range: 8 to 32 MHz

• Operating supply voltage: 5 V ± 10%

• Package: DIP14

Package Dimensions

unit: mm

3003A-DIP14

Specifications

Absolute Maximum Ratings at Ta = 25 ± 2°C, VSS1 = VSS2 = 0 V, VDD= VDD1, VDD2

Allowable Operating Ranges at Ta = –10 to +70°C, VSS1 = VSS2 = 0 V, VDD= VDD1, VDD2

Parameter Symbol Conditions Ratings Unit

Maximum supply voltage V

DD

max –0.3 to +7.0 V

Maximum input voltage V

IN

max –0.3 to VDD+ 0.3 V

Maximum output voltage V

OUT

max –0.3 to VDD+ 0.3 V
Allowable power dissipation Pd max 300 mW
Operating temperature Topr –10 to +70 °C
Storage temperature Tstg –55 to +125 °C

Parameter Symbol Conditions min typ max Unit

Supply voltage V

DD

4.5 5.0 5.5 V

Input high level voltage V

IH

ENA1, ENA2 0.7 V

DD

V

Input low level voltage V

IL

ENA1, ENA2 0.3 V

DD

V

Oscillator range resistors Rrng R1, R2 6.8 13 kΩ

[LC7444]

SANYO: DIP14

Electrical Characteristics at Ta = 25 ± 2°C, VDD= 5 V ± 10%, VSS1 = VSS2 = 0 V, VDD= VDD1, VDD2

Note: 1.

2. Duty: Du

Du =

× 100

Pin Assignment

tH

tH + tL

No. 4305-2/3

LC7444

Parameter Symbol Conditions min typ max Unit

Output high level voltage V

OH

OUT1, OUT2: IOH= –1 mA VDD– 0.4 V

Output low level voltage V

OL

OUT1, OUT2: IOL= 1 mA 0.4 V

Quiescent current I

DDS

ENA1, ENA2 = VDD, FC1, FC2 = V

SS

2 mA

Operating current drain I

DD

R1 = R2 = 7.5 kΩ, no output load,

7 mA

oscillator clock = 20 MHz

Input leakage current I

IH

, I

IL

–1 +1 µA

Oscillator clock frequency

fo

R1, R2 = 6.8 kΩ, FC1, FC2 = V

SS

to V

DD

*1

16 32 MHz

operating range

R1, R2 = 13 kΩ, FC1, FC2 = V

SS

to V

DD

*1

8 16 MHz

Duty Du *2 50 %