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Part: LC7444
Category:
Communication
-> Freq/Signal Converters/Generators
Description: Dual Vco
Company: Sanyo Semiconductor Corporation
Datasheet: Download LC7444 datasheet File size : 702 kB
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Datasheet text preview:
Ordering number : EN4305A
CMOS LSI
LC7444
Dual VCO
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.
Package Dimensions
unit: mm 3003A-DIP14
[LC7444]
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
SANYO: DIP14
Specifications
Absolute Maximum Ratings at Ta = 25 ± 2°C, VSS1 = VSS2 = 0 V, VDD = VDD1, VDD2
Parameter Maximum supply voltage Maximum input voltage Maximum output voltage Allowable power dissipation Operating temperature Storage temperature Symbol VDD max VIN max VOUT max Pd max Topr Tstg Conditions Ratings 0.3 to +7.0 0.3 to VDD + 0.3 0.3 to VDD + 0.3 300 10 to +70 55 to +125 Unit V V V mW °C °C
Allowable Operating Ranges at Ta = 10 to +70°C, VSS1 = VSS2 = 0 V, VDD = VDD1, VDD2
Parameter Supply voltage Input high level voltage Input low level voltage Oscillator range resistors Symbol VDD VIH VIL Rrng ENA1, ENA2 ENA1, ENA2 R1, R2 6.8 Conditions min 4.5 0.7 VDD 0.3 VDD 13 typ 5.0 max 5.5 Unit V V V k
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
52295TH (OT) No. 4305-1/3
LC7444 Electrical Characteristics at Ta = 25 ± 2°C, VDD = 5 V ± 10%, VSS1 = VSS2 = 0 V, VDD = VDD1, VDD2
Parameter Output high level voltage Output low level voltage Quiescent current Operating current drain Input leakage current Oscillator clock frequency operating range Duty Note: 1. Symbol VOH VOL IDDS IDD IIH, IIL fo Du R1, R2 = 6.8 k, FC1, FC2 = VSS to VDD*1 R1, R2 = 13 k, FC1, FC2 = VSS to VDD*1 *2 Conditions OUT1, OUT2: IOH = 1 mA OUT1, OUT2: IOL = 1 mA ENA1, ENA2 = VDD, FC1, FC2 = VSS R1 = R2 = 7.5 k, no output load, oscillator clock = 20 MHz 1 16 8 50 2 7 +1 32 16 min VDD 0.4 0.4 typ max Unit V V mA mA µA MHz MHz %
2. Duty: Du Du = tH × 100 tH + tL
Pin Assignment
No. 4305-2/3
LC7444 Pin Functions
Pin No. 1 2 3 4 5 6 7 Symbol VDD1 OUT1 TEST1 ENA1 R1 FC1 VSS1 Power supply VCO1 clock output Test pin. Must be tied low in normal operation. VCO1 enable input VCO1 oscillator range resistor VCO1 control voltage input Ground Function Pin No. 8 9 10 11 12 13 14 Symbol VSS2 FC2 R2 ENA2 TEST2 OUT2 VDD2 Ground VCO2 control voltage input VCO2 oscillator range resistor VCO2 enable input Test pin VCO2 clock output Power supply Function
Sample Application
s 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. s Anyone purchasing any products described or contained herein for an above-mentioned use shall: 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: 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. s 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. T h i s catalog provides information as of May, 1995. Specifications and information herein are subject to change w i t h o u t notice. PS No. 4305-3/3
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