ICS85357-11(2001) Ver la hoja de datos (PDF) - Integrated Circuit Systems

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componentes Descripción

Fabricante

ICS85357-11
(Rev.:2001)

4:1 OR 2:1, CRYSTAL OSCILLATOR-TO-3.3V LVPECL / ECL MULTIPLEXER

Integrated Circuit Systems 

Integrated

Circuit

Systems, Inc.

ICS85357-11

4:1 OR 2:1, CRYSTAL OSCILLATOR-TO-3.3V

LVPECL / ECL MULTIPLEXER

GENERAL DESCRIPTION

The ICS85357-11 is a 4:1 or 2:1, Crystal

,&6

Oscillator-to-3.3V LVPECL / ECL Multiplexer and

HiPerClockS™ is a member of the HiPerClockS™ family of High

Performance Clock Solutions from ICS. The

ICS85357-11 has 4 selectable crystal

inputs. The device can support 10MHz - 25MHz parallel

resonant crystals by connecting external capacitors between

XTALIN/XTALOUT and ground. The select pins have

internal pulldown resistors and leaving one input

unconnected (pulled to logic low by the internal resistor) will

transform the device into a 2:1 multiplexer. The SEL1 lead is

the most significant line and the binary number applied to

the select pins will select the same numbered data input (i.e.,

00 selects XTALIN0/XTALOUT0).

FEATURES

• 1 differential 3.3V LVPECL output

• 4:1 or 2:1 Crystal Oscillator Multiplexer

• Supports parallel resonant crystals with a frequency range

of 10MHz - 25MHz. The oscillator circuit is optimized for

parallel resonant mode, and will require external capacitance

• Maximum output frequency up to 25MHz

• LVCMOS SEL0 and SEL1 inputs have internal pulldown

resistors

• Part-to-part skew: 150ps (maximum)

• Propagation delay: 2ns (maximum)

• LVPECL mode operating voltage supply range:

VCC = 3.135V to 3.465V, VEE = 0V

• ECL mode operating voltage supply range:

VCC = 0V, VEE = -3.135V to -3.465V

• 0°C to 70°C ambient operating temperature

• Industrial temperature information available upon request

BLOCK DIAGRAM

XTALIN0

XTALOUT0

XTALIN1

XTALOUT1

XTALIN2

XTALOUT2

XTALIN3

XTALOUT3

OSC

OSC

OSC

OSC

00

01

10

11

SEL1 SEL0

PIN ASSIGNMENT

VCC 1

20 VCC

XTALIN0 2 19 SEL1

XTALOUT0 3 18 SEL0

XTALIN1 4 17 VCC

XTALOUT1 5 16 Q0

XTALIN2 6 15 nQ0

XTALOUT2 7 14 VCC

XTALIN3 8 13 nc

XTALOUT3 9 12 nc

Q0

VEE 10 11 VEE

nQ0

ICS85357-11

20-Lead TSSOP

4.40mm x 6.50mm x 0.92mm body package

G Package

Top View

85357AG-11

www.icst.com/products/hiperclocks.html

1

REV. A JULY 25, 2001

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