NTE1581 Datasheet PDF - NTE Electronics

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NTE1581
NTE Electronics

Part Number NTE1581
Description Frequency Divider/Counter
Page 2 Pages


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NTE1581
Integrated Circuit
CMOS, Frequency Divider/Counter for VCR
Description:
The NTE1581 is a frequency divider manufactured by aluminum CMOS technology. It produces a fre-
quency of 1/59719 or 1/88672 of the input frequency (3.58MHz to 60Hz or 4.43MHz to 50Hz).
Features:
D Makes Possible a Crystal Oscillator Circuit
D Capable of Handling SmallAmplitude Input Signals as low as 0.3Vpp
D FrequencyDividing Ratio Selected Through Terminal N
D Reset Function
D Produces a ShapedWaveform Output of the same Frequency as the Input Signal or Oscilla-
tion Output
Dwww.DataSheet4U.com Derives a Vertial Scanning Frequency from TV Color Subcarrier
Applications:
D Frequency Divider for VTR
Absolute Maximum Ratings:
Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.3V to 9V
Input Voltage, VI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . VSS VI VDD
Power Dissipation (TA = +25°C), PT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 250W
Operating FreeAir Temperature Range, Topt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30° to +70°C
Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40° to +125°C
Recommended Operating Conditions: (TA = 30° to +70°C, unless otherwise specified)
Parameter
Symbol
Min
Typ Max
Supply Voltage
Supply Voltage
VDD
VSS
4.75
8.5
0
HighLevel Input Voltage
VIH VDD to 0.5
LowLevel Input Voltage
VIL − − 0.5
Oscillation Input Amplitude Voltage
VI 0.3 − −
Input requency with the terminal N in HighLevel
f
3.58 5.5
Input requency with the terminal N in LowLevel
f
4.43 5.5
Unit
V
V
V
V
VPP
MHz
MHz



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Electrical Characteristics: (TA = +25°C, VDD = 6.5V, VSS = 0V, fIN = 4.5MHz unless otherwise specified)
Parameter
Symbol
Test Conditions
Min Typ Max Unit
Operational Supply Voltage
Supply Current
VDD TA = 30° to +70°C
IDD N. RESET Input/Output Open
4.75
8.5 V
5 mA
HighLevel Input Voltage
VIH
VDD to 0.5 − − V
LowLevel Input Voltage
VIL
− − 0.5 V
HighLevel Output Voltage
VOH
VDD to 0.5 − − V
LowLevel Output Voltage
VOL
− − 0.5 V
HighLevel Output Current
LowLevel Output Current
PullUp Resistance
N. RESET Inputs
IOH VD = VSS
IOL VO = VDD
RI
2 − − mA
2 − − mA
20 k
20 k
Oscillation Input Amplitude Voltage
Max. Operating Frequency
VI
fMAX
VDD = 4.75V
0.3 − − VPP
5.5 − − MHz
Pin Connection Diagram
Divided Freq Output 1
VSS
Freq Dividing Ratio
Select Input
Reset Input RESET
2
3
4
8 VDD
7 Tuner Shaped
Waveform Output
6 OSC Output
5 OSC Input
85
14
.393 (10.0)
Max
.256 (6.52) Max
.150
(3.81)
.300
(7.62)
.100 (2.54)
.300 (7.62)
.070 (1.77) Min



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