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NTE1537 Datasheet(PDF) 1 Page - NTE Electronics

Part No. NTE1537
Description  Integrated Circuit CMOS, Digital Frequency Indicator w/Clock LED Function
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Maker  NTE [NTE Electronics]
Homepage  http://www.nteinc.com
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NTE1537
Integrated Circuit
CMOS, Digital Frequency Indicator
w/Clock LED Function
Applications:
D Car Radio Applications:
FM/AM Receiving Frequency Display and Clock Display
D Home Radio Applications:
FM/AM Receiving Frequency Display and Clock Display
D Car Clock Applications:
Hours–Minutes, Month–Date/Stopwatch Display
Functions:
D FM Receiving Frequency Display (4 Digits)
D AM Receiving Frequency Display (4 Digits)
D Month–Date or Stopwatch Display (Either of these Selectable)
Features:
D Single–Chip CMOS LSI for Static Display System
D Capable of Direct Driving Green LED (Drive Capacity 15mA)
D Capable of Selecting Frequency Display/Time Display
D Use FM/AM Local Oscillation Signal of Varactor Diode, Variable Capacitor, or µ Tuning System
to Digitally Display FM/AM Receiving Frequency
D Covers 4 AM Intermediate Frequencies: +262.5, +452.5, +455, +470kHz
D Covers 2 FM Intermediate Frequencies: +10.7, –10.7MHz
D Capable of Fine–Adjusting AM/FM Display Frequency Error Independently
• A variable Resistor can be used to Correct AM IF Error within ±2.8kHz
• A variable Resistor can be used to Correct FM IF Error within ±140kHz
D Two Selections of Display System (12–Hour System with PM Sign which is Displayed During
Setting Only, 24–Hour System)
D Programmed on Long Months (31 Days)/Short Months (30 Days). Date in February is Pro-
grammed to Count up to the 29th
D Easy to Set Time by th Time Signal
D Stopwatch Capable of Counting/Displaying 1 Second to 12 Hours, 59 Minutes, 59 Seconds
D Inhibit Pin for Inhibiting Time Setting with Display Unlighted
D 4MHz Crystal for Reference Frequency




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