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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 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 Programmed 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
Absolute Maximum Ratings: (TA = +25C, VSS = 0V unless otherwise specified) Maximum Supply Voltage, VDDmax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to 11V (Cumulative applied time: 30min or less) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to 14V Reference Voltage (Vref VDD), Vref . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to 10V (Cumulative applied time: 30min or less) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to 13V Input Voltage, VI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to VDD+0.3V Output Voltage (Output OFF), VO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to VDD+0.3V Allowable Power Dissipation (TA +75C), PDmax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 800mW Allowable Power Disipation of Segment Output, PD(seg) Other than PM: IOL < 25mA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15mW PM: IOL < 75mA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45mW Operating Temperature Range, Topr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -30 to +75C Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -40 to +125C Allowable Operating Ranges: (TA = +25C, VDD = 8 to 10.3V, VSS = 0V, Vref = 7.9 to 9V VDD, Vref = 0V if VDD < 8V unless otherwise specified)
Parameter Supply Voltage Symbol VDD1 VDD2 Reference Voltage Input "H" Level Voltage Input "L" Level Voltage Input "H" Level Voltage Input "L" Level Voltage Input "H" Level Voltage Input "L" Level Voltage Input "M" Level Voltage Input Frequency Vref VIH1 VIL1 VIH2 VIL2 VIH3 VIL3 VIM fIN1 fIN2 Operating Frequency Input Amplitude fopg VP-P Fin-FM, VP-P = 0.7V, Duty 50% Fin-AM, VP-P = 0.7V, Duty 50% Crystal is externally connected across OSC-IN and OSC-OUT Fin-FM, Fin-AM, Ceramic capacitor of 0.4F is connected across VDD an VSS SET, DEMAND, CTR/CLK FM/AM, IF-FM, IF-AM1, IF-AM2, 12H/24H Test Conditions All function operating mode Only clock operating mode Vref VDD INHI, VDD = 4.3 to 10.3V Min 8.0 4.3 7.9 0.75VDD VSS 0.85VDD VSS 0.88VDD VSS 0.36VDD 0.6 0.4 3.5 0.7 Typ 9.3 5.0 8.0 - - - - - - - - - - - Max 10.8 8.0 9.0 VDD 0.1VDD VDD 0.15VDD VDD 0.12VDD 0.64VDD 2.0 2.5 4.2 - Unit V V V V V V V V V V MHz MHz MHz VP-P
Electrical Characteristics: (TA = +25C, VDD = 8 to 10.3V, VSS = 0V, Vref = 7.9 to 9V, Vref VDD unless otherwise specified)
Parameter Input Current Input "H" Level Current Input "L" Level Current Input "H" Level Current Input "L" Level Current Middle Point Setting Resistance Symbol IIN IIH1 IIL1 IIH2 IIL2 rs Test Conditions FM-Fine, AM-Fine, VIN = 0V or Vref IF-FM, IF-AM1, IF-AM2, CTR/CLK, 12H/24H, VIN = 0.9VDD IF-FM, IF-AM1, IF-AM2, CTR/CLK, 12H/24H, VIN = 0V FM/AM, VIN = 0.9VDD FM/AM, VIN = 0V SET, DEMAND Min -1 -80 -3 -40 -3 40 Typ - -30 - -15 - 70 Max +1 -10 0 -5 0 100 Unit A A A A A k
Note 1. + sign: Flowing into LSI - sign: Flowing out of LSI
Electrical Characteristics (Cont'd): (TA = +25C, VDD = 8 to 10.3V, VSS = 0V, Vref = 7.9 to 9V, Vref VDD unless otherwise specified)
Parameter Input Floating Voltage Input "H" Level Current Input Floating Voltage Feedback Resistance Symbol VIF3 IIH4 VIF4 Rf1 Rf2 Rf3 Output "L" Level Voltage VOL1 VOL2 Output Leakage Current Current Dissipation IOFF IDD1 IDD2 Iref Test Conditions SET, DEMAND, input floating INHI, VDD = 4.3 to 10.3V, VIN = VDD INHI, VDD = 4.3 to 10.3V, input floating Feedback resistance across OSC-IN and OSC-OUT Feedback resistance of Fin-FM Feedback resistance of Fin-AM PM, VDD = 8V, IOL = 45mA Segment outputs other than PM VDD = 8V, IOL = 15mA All segment outputs, VDD = 10.3V, VOH = 10.3V VDD = 10.3V, fopg = 4MHz (with crystal mounted), fIN2 = 2.5MHz (0.7VP-P) VDD = 5.5V, fopg = 4MHz (with crystal mounted), Vref = 0V, INHI = 0 VDD = 10.3V, Vref = 9V, AM-Fine = FM-Fine = Vref Min 0.45VDD 15 0 - - - - - - - - - Typ - - - 3 3 3 - - - 8 1.0 0.5 Max 0.55VDD 400 0.3 - - - 0.7 0.7 10 17 2.5 1.5 Unit V A V M M M V V A mA mA mA
Note 1. + sign: Flowing into LSI - sign: Flowing out of LSI
Pin Connection Diagram Seg - d Digit 4 Seg - c Digit 4 Seg - g Digit 4 Seg - b Digit 4 FIN - FM FIN - AM IF - FM IF - AM 2 Vref IF - AM 1 FM/AM FM - Fine AM - Fine CTL/CLD SET Demand INHI 12/24 H OSC Output OSC Input VDD 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 Seg - e Digit 4 Seg - f Digit 4 Seg - a Digit 4 Seg - b Digit 3 Seg - g Digit 3 Seg - c Digit 3 VSS Seg - d Digit 3 Seg - e Digit 3 Seg - f Digit 3 Seg - a Digit 3 Seg - b Digit 2 Seg - g Digit 2 Seg - c Digit 2 Seg - d Digit 2 Seg - e Digit 2 Seg - f Digit 2 Seg - a Digit 2 Seg - b Digit 1 Seg - c Digit 1 Seg - PM Digit 1
42
22
1
21
2.094 (53.2)
.543 (13.8)
.204 (5.18)
.100 (2.54) 2.000 (50.8)
.157 (3.9)
.598 (15.2)

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