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8521BYILFT

Description
IC clk buffer 2:9 500mhz 32tqfp
Categorysemiconductor    Analog mixed-signal IC   
File Size374KB,15 Pages
ManufacturerIDT (Integrated Device Technology, Inc.)
Websitehttp://www.idt.com/
Environmental Compliance  
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8521BYILFT Overview

IC clk buffer 2:9 500mhz 32tqfp

PRELIMINARY
LOW SKEW,
BUFFER
DATA SHEET
Integrated
ICS8521I
1-TO-9 DIFFERENTIAL-TO-HSTL FANOUT
L
OW
S
KEW
, 1-
TO
-9
Circuit
Systems, Inc.
D
IFFERENTIAL
-
TO
-HSTL F
ANOUT
B
UFFER
ICS8521I
G
ENERAL
D
ESCRIPTION
The ICS8521I is a low skew, 1-to-9 Differential-
to-HSTL Fanout Buffer and a member of the
HiPerClockS™
HiPerClockS™family of High Performance Clock
Solutions from ICS. The ICS8521I has two se-
lectable clock inputs. The CLK, nCLK pair can
accept most standard differential input levels. The PCLK,
nPCLK pair can accept LVPECL, CML, or SSTL input levels.
The clock enable is internally synchronized to eliminate runt
pulses on the outputs during asynchronous assertion/
deassertion of the clock enable pin.
F
EATURES
Nine HSTL outputs
Selectable differential CLK, nCLK or LVPECL clock inputs
CLK, nCLK pair can accept the following differential
input levels: LVPECL, LVDS, HSTL, SSTL, HCSL
PCLK, nPCLK supports the following input types:
LVPECL, CML, SSTL
Maximum output frequency: 500MHz
Output skew: 25ps (typical)
Part-to-part skew: 200ps (typical)
Propagation delay: 1.3ns (typical)
V
OH
= 1.4V (maximum)
3.3V core, 1.8V output operating supply voltages
-40°C to 85°C ambient operating temperature
Available in both standard and lead-free RoHS
compliant packages
IC
S
Guaranteed output skew, part-to-part skew and crossover
voltage characteristics make the ICS8521I ideal for today’s
most advanced applications, such as IA64 and static RAMs.
B
LOCK
D
IAGRAM
CLK_EN
CLK
nCLK
PCLK
nPCLK
CLK_SEL
D
Q
LE
0
1
Q0
nQ0
Q1
nQ1
Q2
nQ2
Q3
nQ3
Q4
nQ4
Q5
nQ5
Q6
nQ6
Q7
nQ7
Q8
nQ8
P
IN
A
SSIGNMENT
V
DDO
nQ2
Q2
nQ1
Q1
nQ0
Q0
V
DDO
32 31 30 29 28 27 26 25
V
DD
CLK
nCLK
CLK_SEL
PCLK
nPCLK
GND
CLK_EN
1
2
3
4
5
6
7
8
24
23
22
21
20
19
18
17
V
DDO
Q3
nQ3
Q4
nQ4
Q5
nQ5
V
DDO
ICS8521I
9 1 0 1 1 1 2 1 3 1 4 1 5 16
V
DDO
Q6
nQ6
Q7
nQ7
Q8
nQ8
V
DDO
32-Lead LQFP
7mm x 7mm x 1.4mm package body
Y Package
Top View
The Preliminary Information presented herein represents a product in prototyping or pre-production. The noted characteristics are based on initial
product characterization. Integrated Circuit Systems, Incorporated (ICS) reserves the right to change any circuitry or specifications without notice.
8521BYI
www.icst.com/products/hiperclocks.html
REV. A NOVEMBER 17, 2005
IDT™ / ICS™
LOW SKEW, 1-TO-9 DIFFERENTIAL-TO-HSTL FANOUT BUFFER
1
1
ICS8521I

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