ics87952-147 Integrated Device Technology, ics87952-147 Datasheet

ics87952-147

Manufacturer Part Number

ics87952-147

Description

High-fanout Lvcmos-input Lvcmos-output 1 11 180-mhz Clock Generator

Manufacturer

Integrated Device Technology

Datasheet

1.ICS87952-147.pdf (12 pages)

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VCO_SEL

is targeted for high performance clock applications. Along

with a fully integrated PLL, the ICS87952I-147 contains fre-

quency configurable outputs and an external feedback input

for regenerating clocks with “zero delay”.

For test and system debug purposes, the nPLL_EN input

allows the PLL to be bypassed. When HIGH, the MR/nOE

input resets the internal dividers and forces the outputs to the

high impedance state.

The low impedance LVCMOS/LVTTL outputs of the

ICS87952I-147 are designed to drive terminated transmis-

sion lines. The effective fanout of each output can be doubled

by utilizing the ability of each output to drive two series termi-

nated transmission lines.

REF_CLK

87952AYI-147

nPLL_EN

HiPerClockS™

F_SELC

MR/nOE

F_SELA

F_SELB

IC S

LOCK

ENERAL

FB_IN

DETECTOR

The ICS87952I-147 is a low voltage, low skew

LVCMOS/LVTTL Clock Generator and a mem-

ber of the HiPerClockS™ family of High Perfor-

mance Clock Solutions from ICS. With output

frequencies up to 180MHz, the ICS87952I-147

PHASE

IAGRAM

Integrated

Circuit

Systems, Inc.

ESCRIPTION

LFP

240 - 480MHz

VCO

LVCMOS / LVTTL C

÷2

www.icst.com/products/hiperclocks.html

÷4/÷6

÷4/÷2

÷2/÷4

• Fully integrated PLL

• Eleven LVCMOS / LVTTL outputs,

• LVCMOS / LVTTL REF_CLK input

• Output frequency range up to 180MHz at V

• VCO range: 240MHz - 480MHz

• External feedback for “zero delay” clock regeneration

• Cycle-to-cycle jitter: 100ps (maximum)

• 3.3V supply voltage

• -40°C to 85°C ambient operating temperature

• Available in both standard and lead-free RoHS compliant

QA0

QA1

QA2

QA3

QA4

QB0

QB1

QB2

QB3

QC0

QC1

7Ω typical output impedance

packages

EATURES

LOCK

SSIGNMENT

GNDO

QC0

QC1

QB2

QB3

DDO

7mm x 7mm x 1.4mm package body

ULTIPLIER

24 23 22 21 20 19 18 17

ICS87952I-147

32-Lead LQFP

ICS87952I-147

Y package

Top View

ERO

KEW

ELAY

REV. B APRIL 10, 2006

= 3.3V ± 5%

, 1-

QA2

QA1

GNDO

QA0

nPLL_EN

UFFER

DDO

DDA

-11

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