Data Sheet

NTE1537
Integrated Circuit
CMOS, Digital Frequency Indicator
w/Clock LED Function

Applications:
Car Radio Applications: FM/AM Receiving Frequency Display and Clock Display
Home Radio Applications: FM/AM Receiving Frequency Display and Clock Display
Car Clock Applications: Hours-Minutes, Month-Date/Stopwatch Display

Functions:
FM Receiving Frequency Display (4 Digits)
AM Receiving Frequency Display (4 Digits)
Month-Date or Stopwatch Display (Either of these Selectable)

Features:
Single-Chip CMOS LSI for Static Display System
Capable of Direct Driving Green LED (Drive Capacity 15mA)
Capable of Selecting Frequency Display/Time Display
Use FM/AM Local Oscillation Signal of Varactor Diode, Variable Capacitor, or µ Tuning System
to Digitally Display FM/AM Receiving Frequency
Covers 4 AM Intermediate Frequencies: +262.5, +452.5, +455, +470kHz
Covers 2 FM Intermediate Frequencies: +10.7, -10.7MHz
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
Two Selections of Display System (12-Hour System with PM Sign which is Displayed During
Setting Only, 24-Hour System)
Programmed on Long Months (31 Days)/Short Months (30 Days). Date in February is Programmed
to Count up to the 29th
Easy to Set Time by the Time Signal
Stopwatch Capable of Counting/Displaying 1 Second to 12 Hours, 59 Minutes, 59 Seconds
Inhibit Pin for Inhibiting Time Setting with Display Unlighted
4MHz Crystal for Reference Frequency

Replaces:
ECG1537

Additional Model #'s
76-NTE1537
NTE1537

UPC: 768249053910