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74HCT9046AD Datenblatt(PDF) 2 Page - NXP Semiconductors

Teilenummer 74HCT9046AD
Bauteilbeschribung  PLL with bandgap controlled VCO
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Hersteller  PHILIPS [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

74HCT9046AD Datenblatt(HTML) 2 Page - NXP Semiconductors

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1999 Jan 11
2
Philips Semiconductors
Product specification
PLL with bandgap controlled VCO
74HCT9046A
FEATURES
• Low power consumption
• Centre frequency up to
17 MHz (typ.) at VCC = 5.5 V
• Choice of two phase
comparators(1):
– EXCLUSIVE-OR (PC1)
– Edge-triggered JK flip-flop (PC2)
• No dead zone of PC2
• Charge pump output on PC2,
whose current is set by an external
resistor Rb
• Centre frequency tolerance ±10%
• Excellent
voltage-controlled-oscillator (VCO)
linearity
• Low frequency drift with supply
voltage and temperature variations
• On chip bandgap reference
• Glitch free operation of VCO, even
at very low frequencies
• Inhibit control for ON/OFF keying
and for low standby power
consumption
• Operation power supply voltage
range 4.5 to 5.5 V
• Zero voltage offset due to op-amp
buffering
• Output capability: standard
• ICC category: MSI.
APPLICATIONS
• FM modulation and demodulation
where a small centre frequency
tolerance is essential
• Frequency synthesis and
multiplication where a low jitter is
required (e.g. Video
picture-in-picture)
• Frequency discrimination
(1) Rb connected between pin 15 and
ground: PC2 mode, with PCPOUT at
pin 2.
Pin 15 left open or connected to VCC:
PC1 mode with PC1OUT at pin 2.
• Tone decoding
• Data synchronization and
conditioning
• Voltage-to-frequency conversion
• Motor-speed control.
GENERAL DESCRIPTION
The 74HCT9046A is a high-speed
Si-gate CMOS device. It is specified
in compliance with
“JEDEC standard
no. 7A”.
QUICK REFERENCE DATA
GND = 0 V; Tamb = 25 °C; tr = tf ≤ 6 ns.
Notes
1. CPD is used to determine the dynamic power dissipation (PD in µW)
a) PD = CPD × VCC2 × fi + Σ(CL × VCC2 × fo) where:
b) fi = input frequency in MHz; CL = output load capacity in pF;
fo = output frequency in MHz; VCC = supply voltage in V;
Σ(CL × VCC2 × fo) = sum of the outputs.
2. Applies to the phase comparator section only (inhibit = HIGH). For power
dissipation of the VCO and demodulator sections see Figs 26 to 28.
ORDERING INFORMATION
SYMBOL
PARAMETER
CONDITIONS
TYP.
UNIT
fc
VCO centre frequency
C1 = 40 pF;
R1 = 3 k
Ω;
VCC = 5 V
16
MHz
CI
input capacitance
3.5
pF
CPD
power dissipation
capacitance per
package
notes 1 and 2
20
pF
EXTENDED
TYPE NUMBER
PACKAGE
PINS
PIN POSITION
MATERIAL
CODE
74HCT9046AN
16
DIL16
plastic
SOT38Z
74HCT9046AD
16
SO16
plastic
SOT109A


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