PDF ICS87974I Data sheet ( Hoja de datos )

Número de pieza	ICS87974I
Descripción	LVCMOS/LVTTL CLOCK GENERATOR
Fabricantes	Integrated Circuit Systems
Logotipo
Hay una vista previa y un enlace de descarga de ICS87974I (archivo pdf) en la parte inferior de esta página. Total 14 Páginas
No Preview Available ! Integrated Circuit Systems, Inc. ICS87974I L S , 1- -15,OW KEwWww.DaTtaOSheet4U.com LVCMOS/LVTTL CLOCK GENERATOR GENERAL DESCRIPTION The ICS87974I is a low skew, low jitter 1-to-15 ,&6 LVCMOS/LVTTL Clock Generator/Zero Delay HiPerClockS™ Buffer and is a member of the HiPerClockS family of high performance clock solutions from ICS. The device has a fully integrated PLL and three banks whose divider ratios can be independently controlled, providing output frequency relationships of 1:1, 2:1, 3:1, 3:2, 3:2:1. In ad- dition, the external feedback connection provides for a wide selection of output-to-input frequency ratios. The CLK0 and CLK1 pins allow for redundant clocking on the input and dynamically switching the PLL between two clock sources. The ICS87974I is pin for pin compatible with the MPC974. Guaranteed low jitter and output skew characteristics make the ICS87974I ideal for those applications demanding well defined performance and repeatability. FEATURES • Fully integrated PLL • 15 single ended 3.3V LVCMOS/LVTTL outputs • 2 LVCMOS/LVTTL clock inputs for redundant clock applications • CLK0 and CLK1 accepts the following input levels: LVCMOS/LVTTL • Output frequency range: 8.33MHz to 125MHz • VCO range: 200MHz to 500MHz • External feedback for ”zero delay” clock regeneration • Cycle-to-cycle jitter: ±100ps (typical) • Output skew: 350ps (maximum) • 3.3V operating supply • -40°C to 85°C ambient operating temperature • Pin compatible with the MPC974 PIN ASSIGNMENT GND nMR/OE CLK_EN SEL_B SEL_C PLL_SEL SEL_A CLK_SEL CLK0 CLK1 nc VDD VDDA 52 51 50 49 48 47 46 45 44 43 42 41 40 1 39 2 38 3 37 4 36 5 35 6 34 7 ICS87974I 33 8 32 9 31 10 30 11 29 12 28 13 27 14 15 16 17 18 19 20 21 22 23 24 25 26 GND QB1 VDDOB QB2 GND QB3 VDDOB QB4 FB_IN GND QFB VDDOFB nc 52-Lead LQFP 10mm x 10mm x 1.4mm package body Y package Top View 87974AYI www.icst.com/products/hiperclocks.html 1 REV. B MAY 15, 2003 1 page Integrated Circuit Systems, Inc. ICS87974I L S , 1- -15,OW KEwWww.DaTtOaSheet4U.com LVCMOS/LVTTL CLOCK GENERATOR TABLE 2. PIN CHARACTERISTICS Symbol Parameter Test Conditions CIN RPULLUP RPULLDOWN C PD Input Capacitance Input Pullup Resistor Input Pulldown Resistor Power Dissipation Capacitance (per output); Note 1 V V , V = 3.465V DD, DDA DDOx NOTE 1: VDDOx denotes VDDOA, VDDOB, VDDOC, VDDOFB. Minimum Typical 4 51 51 Maximum Units pF KΩ KΩ 15 pF TABLE 3A. OUTPUT CONTROL PIN FUNCTION TABLE Inputs nMR/OE CLK_EN 0X 10 11 QA0:QA4 HiZ LOW Enable Outputs QB0:QB4 QC0:QC3 HiZ HiZ LOW LOW Enable Enable QFB HiZ Enable Enable TABLE 3B. OPERATING MODE FUNCTION TABLE Inputs PLL_SEL 0 1 Operating Mode Bypass PLL TABLE 3C. PLL INPUT FUNCTION TABLE CLK_SEL 0 1 Inputs PLL Input CLK0 CLK1 TABLE 3D. SELECT PIN FUNCTION TABLE SEL_A 0 1 QAx ÷2 ÷4 SEL_B 0 1 QBx ÷2 ÷4 SEL_C 0 1 QCx ÷4 ÷6 TABLE 3E. FB SELECT FUNCTION TABLE Inputs FB_SEL1 FB_SEL0 00 01 10 11 Outputs QFB ÷4 ÷6 ÷8 ÷ 12 TABLE 3F. VCO SELECT FUNCTION TABLE VCO_SEL 0 1 Inputs fVCO VCO/2 VCO/4 87974AYI www.icst.com/products/hiperclocks.html 5 REV. B MAY 15, 2003 5 Page Integrated Circuit Systems, Inc. ICS87974I L S , 1- -15,OW KEwWww.DaTtOaSheet4U.com LVCMOS/LVTTL CLOCK GENERATOR RELIABILITY INFORMATION TABLE 6. θJAVS. AIR FLOW TABLE qJA by Velocity (Linear Feet per Minute) Single-Layer PCB, JEDEC Standard Test Boards Multi-Layer PCB, JEDEC Standard Test Boards 0 58.0°C/W 42.3°C/W 200 47.1°C/W 36.4°C/W 500 42.0°C/W 34.0°C/W NOTE: Most modern PCB designs use multi-layered boards. The data in the second row pertains to most designs. TRANSISTOR COUNT The transistor count for ICS87974I is: 4225 87974AYI www.icst.com/products/hiperclocks.html 11 REV. B MAY 15, 2003 11 Page

Páginas	Total 14 Páginas
PDF Descargar	[ Datasheet ICS87974I.PDF ]

Hoja de datos destacado

Número de pieza	Descripción	Fabricantes
ICS87974I	LVCMOS/LVTTL CLOCK GENERATOR	Integrated Circuit Systems
ICS87974I	LVCMOS/LVTTL CLOCK GENERATOR	Integrated Device Technology

Número de pieza	Descripción	Fabricantes
SLA6805M	High Voltage 3 phase Motor Driver IC.	Sanken
SDC1742	12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters.	Analog Devices

DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares,
permitiéndote verlos en linea o descargarlos en PDF.

DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar