SY55858U_05 datasheet(6/8 Pages) MICREL

Part #	SY55858U

Description	2.5V/3.3V 3.0GHZ DUAL 2 x 2 CML CROSSPOINT SWITCH W/INTERNAL TERMINATION

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Manufacturer	MICREL [Micrel Semiconductor]

Direct Link	http://www.micrel.com

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6 / 8 page

6

SuperLite™

SY55858U

Micrel, Inc.

M9999-110705

hbwhelp@micrel.com or (408) 955-1690

Symbol

Parameter

Min.

Typ.

Max.

Unit

Condition

f

MAX

Maximum Frequency

NRZ Data Rate

3.0

——

Gbps

Clock Frequency(6)

3.0

——

GHz

t

PLH

Differential Propagation Delay

220

350

450

ps

t

PHL

D-to-Q

t

SWITCH

Select-to-Valid Output(7)

—

0.50

1.0

ns

t

SKEW

Within-Device Skew(8)

—

12

25

ps

Within-Device Skew(9)

—

25

50

ps

Part-to-Part Skew (Diff.)

—

100

—

R

J

Random Jitter

—

25

psRMS

D

J

Deterministic Jitter

—

520

psPP

t

r, tf

CML Output Rise/Fall Times

—

80

120

ps

(20% to 80%)

AC ELECTRICAL CHARACTERISTICS

V

CC = 2.3V to 3.6V; GND = 0V; TA = –40°C to +85°C

(5)

Note 5.

Tested using environment of Figure 3, 50

Ω equivalent load. AC parameters are guaranteed by design and characterization.

Note 6.

fMAX clock is defined as the maximum toggle rate the device can operate while still achieving a 250mV minimum CML output swing, 50Ω

equivalent load.

Note 7.

Input TTL/CMOS edge rate of <1.5ns.

Note 8.

Worst-case difference between QA0 and QA1 from either DA0 or DA1 (or between QB0 and QB1 from either DB0 or DB1 respectively), when

both outputs come from the same input.

Note 9.

Worst-case difference between QA and QB outputs, when DA or DB inputs are shorted.

Symbol

Parameter

Min.

Typ.

Max.

Unit

Condition

V

ID

Differential Input Voltage

100

——

mV

R

IN

Differential Input Resistance

D-to-/D

90

100

110

Ω

V

IH

Input HIGH Voltage

1.6

—

V

CC

V

IL

Input LOW Voltage

1.5

—

V

CC – 0.1

V

OH

Output HIGH Voltage

V

CC – 0.040

V

CC – 0.010

V

CC

V

No Load

V

OL

Output LOW Voltage

V

CC – 1.00

V

CC – 0.800

V

CC – 0.650

V

No Load

V

OUT(SWING) Output Voltage Swing

(4)

0.650

0.800

1.00

V

No Load

—

0.400

—

50

Ω Environment

R

OUT

Output Source Impedance

40

50

60

Ω

Note 3.

Device is guaranteed to meet the DC specifications, shown in the table above, after thermal equilibrium has been established. The device is

tested in a socket such that traverse airflow

≥500lfpm is maintained.

Note 4.

VOUT(SWING) is defined as the swing on one output of a differential pair, that is |VOH – VOL| on one pin. The swing for common mode immunity

purposes is 2

× V

OUT(SWING). Actual voltage levels and differential swing will depend on customer termination scheme. Typically, a 400mV

swing is available in the 50

Ω environment. Refer to the “CML Output Termination Application” section, Figures 3 and 4, for more details.

CML DC ELECTRICAL CHARACTERISTICS

V

CC = 2.3V to 3.6V; GND = 0V; TA = –40°C to +85°C

(3)

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