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74HCT7046A

Philips
Part Number 74HCT7046A
Manufacturer Philips
Description Phase-locked-loop
Published Apr 23, 2005
Detailed Description INTEGRATED CIRCUITS DATA SHEET For a complete data sheet, please also download: • The IC06 74HC/HCT/HCU/HCMOS Logic Fam...
Datasheet PDF File 74HCT7046A PDF File

74HCT7046A
74HCT7046A

Overview
INTEGRATED CIRCUITS DATA SHEET For a complete data sheet, please also download: • The IC06 74HC/HCT/HCU/HCMOS Logic Family Specifications • The IC06 74HC/HCT/HCU/HCMOS Logic Package Information • The IC06 74HC/HCT/HCU/HCMOS Logic Package Outlines 74HC/HCT7046A Phase-locked-loop with lock detector Product specification File under Integrated Circuits, IC06 December 1990 Philips Semiconductors Product specification Phase-locked-loop with lock detector FEATURES • Low power consumption • Centre frequency up to 17 MHz (typ.
) at VCC = 4.
5 V • Choice of two phase comparators: EXCLUSIVE-OR; edge-triggered JK flip-flop; • Excellent VCO frequency linearity • VCO-inhibit control for ON/OFF keying and for low standby power consumption • Minimal frequency drift • Operation power supply voltage range: VCO section 3.
0 to 6.
0 V digital section 2.
0 to 6.
0 V • Zero voltage offset due to op-amp buffering • Output capability: standard • ICC category: MSI GENERAL DESCRIPTION The 74HC/HCT7046 are high-speed Si-gate CMOS devices and are specified in compliance with JEDEC standard no.
7.
The 74HC/HCT7046 are phase-locked-loop circuits that comprise a linear voltage-controlled oscillator (VCO) and two different phase comparators (PC1 and PC2) with a common signal input amplifier and a common comparator input.
A lock detector is provided and this gives a HIGH level at pin 1 (LD) when the PLL is locked.
The lock detector capacitor must be connected between pin 15 (CLD) and pin 8 (GND).
The value of the CLD capacitor can be determined, using information supplied in Fig.
32.
The input signal can be directly coupled to large voltage signals, or indirectly coupled (with a series capacitor) to small voltage signals.
A self-bias input circuit keeps small voltage signals within the linear region of the input December 1990 amplifiers.
With a passive low-pass filter, the “7046” forms a second-order loop PLL.
The excellent VCO linearity is achieved by the use of linear op-amp techniques.
VCO The VCO r...


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