器件名称:
74HCT9046A
功能描述:
PLL with bandgap controlled VCO
文件大小:
240.35KB 共40页
简 介:
INTEGRATED CIRCUITS DATA SHEET 74HCT9046A PLL with bandgap controlled VCO Product specication Supersedes data of March 1994 File under Integrated Circuits, IC06 1999 Jan 11 Philips Semiconductors Product specication PLL with bandgap controlled VCO 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. 74HCT9046A GENERAL DESCRIPTION The 74HCT9046A is a high-speed Si-gate CMOS device. It is specified in compliance with “JEDEC standard……
