ICS840-125 ICST | Alldatasheet

Document overview

  • Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
  • PDF pages: 9

Technical content

www.icst.com/products/hiperclocks.html REV. A FEBRUARY 3, 2006 Integrated Circuit Systems, Inc. ICS840-125 125MHZ, LVCMOS/LVTTL OSCILLATOR REPLACEMENT GENERAL DESCRIPTION The ICS840-125 is a Gigabit Ethernet Oscillator Replacement and a member of the HiPerClocksTM family of high performance devices from ICS. The ICS840-125 uses a 25MHz crystal to synthesize 125MHz. The ICS840-125 has excellent jitter performance. The ICS840-125 is packaged in a small 8-pin TSSOP, making it ideal for use in systems with limited board space.

FEATURES

  • One LVCMOS/LVTTL output, 15Ω output impedance
  • Crystal oscillator interface designed for 25MHz, 18pF parallel resonant crystal
  • Output frequency: 125MHz
  • Random jitter: 3.7ps (typical)
  • Deterministic jitter: 0.1ps (typical)
  • 3.3V operating supply
  • 0°C to 70°C ambient operating temperature
  • Available in both standard and lead-free RoHS-compliant packages HiPerClockS™ ICS BLOCK DIAGRAM PIN ASSIGNMENT Clock Synthesizer XTAL_IN XTAL_OUT OE Q Pullup 25MHz 125MHz ICS840-125 8-Lead TSSOP 4.40mm x 3.0mm x 0.925mm package body G Package Top View ICS840-125 8-Lead SOIC 3.90mm x 4.92mm x 1.37mm body package M Package Top View VDD XTAL_OUT XTAL_IN OE nc Q VDDO GND

TABLE 1. PIN DESCRIPTIONS TABLE 2. PIN CHARACTERISTICS TABLE 3. CONROL FUNCTION TABLE

TABLE 5. CRYSTAL CHARACTERISTICS

8 Lead TSSOP

8 Lead SOIC

TABLE 6. AC CHARACTERISTICS, VDD = VDDO = 3.3V±0.3V, TA = 0°C TO 70°C

www.icst.com/products/hiperclocks.html REV. A FEBRUARY 3, 2006 Integrated Circuit Systems, Inc. ICS840-125 125MHZ, LVCMOS/LVTTL OSCILLATOR REPLACEMENT PARAMETER MEASUREMENT INFORMATION OUTPUT RISE/FALL TIME 3.3V OUTPUT LOAD AC TEST CIRCUIT SCOPE Qx LVCMOS 1.65V ± 0.15V -1.65V ± 0.15V Clock Outputs 20% 80% 80% 20% tR tF tPERIOD tPW tPERIOD odc = VDDO x 100% tPW Q GND VDD, VDDO OUTPUT DUTY CYCLE/PULSE WIDTH/PERIOD

www.icst.com/products/hiperclocks.html REV. A FEBRUARY 3, 2006 Integrated Circuit Systems, Inc. ICS840-125 125MHZ, LVCMOS/LVTTL OSCILLATOR REPLACEMENT RELIABILITY INFORMATION TRANSISTOR COUNT The transistor count for ICS840-125 is: 2423 TABLE 7A. θJAVS. AIR FLOW TABLE FOR 8 LEAD TSSOP θθθθθJA by Velocity (Meters per Second) 2.5 Multi-Layer PCB, JEDEC Standard Test Boards 101.7°C/W 90.5°C/W 89.8°C/W TABLE 7B. θJAVS. AIR FLOW TABLE 8 LEAD SOIC θθθθθJA by Velocity (Linear Feet per Minute) 200 500 Single-Layer PCB, JEDEC Standard Test Boards 153.3°C/W 128.5°C/W 115.5°C/W Multi-Layer PCB, JEDEC Standard Test Boards 112.7°C/W 103.3°C/W 97.1°C/W NOTE: Most modern PCB designs use multi-layered boards. The data in the second row pertains to most designs.

www.icst.com/products/hiperclocks.html REV. A FEBRUARY 3, 2006 Integrated Circuit Systems, Inc. ICS840-125 125MHZ, LVCMOS/LVTTL OSCILLATOR REPLACEMENT PACKAGE OUTLINE - G SUFFIX FOR 8 LEAD TSSOP TABLE 8A. PACKAGE DIMENSIONS L O B M Y S s r e t e m illi M m u m i n i M m u m i x a M N A A A b c D E C I S A B E e C I S A B L α a a a PACKAGE OUTLINE - M SUFFIX FOR 8 LEAD SOIC TABLE 8B. PACKAGE DIMENSIONS Reference Document: JEDEC Publication 95, MS-012 L O B M Y S s r e t e m illi M M U M I N I M M U M I X A M N A A B C D E e C I S A B H h L α

TABLE 9. ORDERING INFORMATION product for use in life support devices or critical medical instruments. The aforementioned trademark, HiPerClockS is a trademark of Integrated Circuit Systems, Inc. or its subsidiaries in the United States and/or other countries.