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ICS85311AM

Low Skew, 1-to-2 Differential-to-2.5V/3.3V ECL/LVPECL Fanout Buffer

Integrated Circuit Systems 

Integrated

Circuit

Systems, Inc.

ICS85311

Low Skew, 1-to-2

Differential-to-2.5V/3.3V ECL/LVPECL Fanout Buffer

TABLE 3D. DIFFERENTIAL DC CHARACTERISTICS, VCC = 2.5V±5%, TA = 0°C TO 70°C

Symbol Parameter

Test Conditions

Minimum Typical

CLK

IIH

Input High Current

nCLK

VCC = VIN = 2.625V

VCC = VIN = 2.625V

CLK

I

Input Low Current

IL

nCLK

VCC = 2.625V, VIN = 0V

VCC = 2.625V, VIN = 0V

-5

-150

VPP

VCMR

Peak-to-Peak Input Voltage

Common Mode Input Voltage;

NOTE 1, 2

0.15

VEE + 0.5

NOTE 1: Common mode voltage is defined as VIH.

NOTE 2: For single ended applications, the maximum input voltag for CLK, nCLK is VCC + 0.3V.

Maximum

150

5

1.3

Units

µA

µA

µA

µA

V

VCC - 0.85

V

TABLE 3E. LVPECL DC CHARACTERISTICS, VCC = 3.3V±5%, VCC = 2.5V±5%, TA = 0°C TO 70°C

Symbol Parameter

Test Conditions Minimum Typical

VOH

Output High Voltage; NOTE 1

VOL

Output Low Voltage; NOTE 1

VSWING Peak-to-Peak Output Voltage Swing

NOTE 1: Outputs terminated with 50Ω to VCC - 2V.

VCC - 1.4

VCC - 2.0

0.65

Maximum

VCC - 1.0

VCC - 1.7

0.9

Units

V

V

V

TABLE 4F. AC CHARACTERISTICS, VCC = 3.3V±5%, VCC = 2.5V±5%, TA = 0°C TO 70°C

Symbol Parameter

Test Conditions

Minimum Typical Maximum

fMAX

Maximum Output Frequency

1

tPD

Propagation Delay; NOTE 1

IJ 1GHz

0.9

1.4

tsk(o) Output Skew; NOTE 2, 4

15

tsk(pp) Part-to-Part Skew; NOTE 3, 4

100

tR

Output Rise Time

20% to 80% @ 50MHz

300

700

tF

Output Fall Time

20% to 80% @ 50MHz

300

700

odc

Output Duty Cycle

48

52

All parameters measured at 500MHz unless noted otherwise.

NOTE 1: Measured from the differential input crossing point to the differential output crossing point.

NOTE 2: Defined as skew between outputs at the same supply voltage and with equal load conditions.

Measured at the output differential cross points.

NOTE 3: Defined as skew between outputs on different devices operating at the same supply voltages

and with equal load conditions. Using the same type of inputs on each device, the outputs are measured

at the differential cross points.

NOTE 4: This parameter is defined in accordance with JEDEC Standard 65.

Units

GHz

ns

ps

ps

ps

ps

%

ICS85311AM

www.icst.com/products/hiperclocks.html

4

REV. A JUNE 29, 2001

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