NTE1537 Datasheet, PDF (1/4 Pages) NTE Electronics – Integrated Circuit CMOS, Digital Frequency Indicator w/Clock LED Function

NTE1537
Integrated Circuit
CMOS, Digital Frequency Indicator
w_{/Clock LED Function}
Applications:
D Car Radio Applications:
D Home Radio Applications:
D Car Clock Applications:
FM/AM Receiving Frequency Display and Clock Display
FM/AM Receiving Frequency Display and Clock Display
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 29^th
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