MAX9492 datasheet(4/11 Pages) MAXIM

Part #	MAX9492

Description	Multiple-Output Clock Generator with Spread Spectrum

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Manufacturer	MAXIM [Maxim Integrated Products]

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Multiple-Output Clock Generator

with Spread Spectrum

4

_______________________________________________________________________________________

Typical Operating Characteristics

(TA = +25°C, unless otherwise noted.)

FALL TIME vs. TEMPERATURE

(ALL OUTPUTS SET TO 133MHz)

TEMPERATURE (

°C)

-40

-15

10

35

60

85

1.0

1.2

1.4

1.6

1.8

2.0

SUPPLY CURRENT vs. TEMPERATURE

(ALL OUTPUTS SET TO 133MHz)

TEMPERATURE (

°C)

-40

-15

10

35

60

85

58.0

58.4

58.8

59.2

59.6

60.0

60.4

60.8

61.2

61.6

62.0

RISE TIME vs. TEMPERATURE

(ALL OUTPUTS SET TO 133MHz)

TEMPERATURE (

°C)

-40

-15

10

35

60

85

1.5

1.7

1.9

2.1

2.3

2.5

Note 1: All DC parameters tested at TA = +25°C. Specifications over temperature are guaranteed by design.

Note 2: Guaranteed by design.

Note 3: No high output level is specified but only the output resistance to the bus. For I2C, the high-level voltage is provided by

pullup resistors on the bus.

Note 4: The device provides a hold time of at least 300ns for the SDA signal (referred to VIL of the SCL signal) to bridge the unde-

fined region of SCL’s falling edge.

Note 5: CB = total capacitance of one bus line in pF. tR and tF measured between 0.3 x VDD and 0.7 x VDD.

Note 6: Bus sink current is less than 6mA. CB is the total capacitance of one bus line in pF. tR and tF are measured between 0.3 x

VDD and 0.7 x VDD.

Note 7: Input filters on the SDA and SCL inputs suppress noise spikes less than 50ns.

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Fall Time of SDA, Transmitting

tF,TX

(Notes 2, 6)

20 +

0.1CB

250

ns

Pulse Width of Spike Suppressed

tSP

(Notes 2, 7)

0

50

ns

Capacitive Load for Each Bus

Line

CB

(Note 2)

400

pF

SERIAL INTERFACE TIMING (continued)

(VDD = VDDA = +3.3V, TA = -40°C to +85°C.) (Note 1, Figure 1)

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