DS25MB200 datasheet(9/13 Pages) NSC

9 / 13 page

Electrical Characteristics (Continued)

Over recommended operating supply and temperature ranges unless otherwise specified.

Symbol

Parameter

Conditions

Min

Typ

(Note 2)

Max

Units

AC CHARACTERISTICS

Mux Switch Time

Measured from V

IH or VIL of the mux-control

or loopback control to 50% of the valid

differential output.

1.8

Device Random Jitter

(Note 5)

See Figure 5 for test circuit.

Alternating-1-0 pattern.

Pre-emphasis disabled.

At 1.25 Gbps

At 2.5 Gbps

psrms

Device Deterministic

Jitter (Note 6)

See Figure 5 for test circuit.

Pre-emphasis disabled.

Between 0.8 and 2.5 Gbps with PRBS7

pattern for DS25MB200 @ 0˚c–85˚C

Pspp

MAX

Maximum Data Rate

Tested with alternating-1-0 pattern

2.5

Gbps

Note 1: “Absolute Maximum Ratings” are the ratings beyond which the safety of the device cannot be guaranteed. They are not meant to imply that the device

should be operated at these limits.

Note 2: Typical parameters measured at VCC = 3.3V, TA = 25˚C. They are for reference purposes and are not production-tested.

Note 3: IN+ and IN− are generic names refer to one of the many pairs of complimentary inputs of the DS25MB200. OUT+ and OUT− are generic names refer to

one of the many pairs of the complimentary outputs of the DS25MB200. Differential input voltage VID is defined as |IN+–IN−|. Differential output voltage VOD is

defined as |OUT+–OUT−|.

Note 4: K28.7 pattern is a 10-bit repeating pattern of K28.7 code group {001111 1000}

K28.5 pattern is a 20-bit repeating pattern of +K28.5 and −K28.5 code groups {110000 0101 001111 1010}

Note 5: Device output random jitter is a measurement of the random jitter contribution from the device. It is derived by the equation sqrt(RJOUT

2–RJ

2), where

RJOUT is the total random jitter measured at the output of the device in psrms, RJIN is the random jitter of the pattern generator driving the device.

Note 6: Device output deterministic jitter is a measurement of the deterministic jitter contribution from the device. It is derived by the equation (DJOUT–DJIN), where

DJOUT is the total peak-to-peak deterministic jitter measured at the output of the device in pspp, DJIN is the peak-to-peak deterministic jitter of the pattern generator

driving the device.

Note 7: tSKO is the magnitude difference in the propagation delays among data paths between switch A and switch B of the same port and similar data paths

between port 0 and port 1. An example is the output skew among data paths from SIA_0± to LO_0±, SIB_0± to LO_0±, SIA_1± to LO_1± and SIB_1± to LO_1±.

Another example is the output skew among data paths from LI_0± to SOA_0±, LI_0± to SOB_0±, LI_1± to SOA_1± and LI_1± to SOB_1±.tSKO also refers to the

delay skew of the loopback paths of the same port and between similar data paths between port 0 and port 1. An example is the output skew among data paths

SIA_0± to SOA_0±, SIB_0± to SOB_0±, SIA_1± to SOA_1± and SIB_1± to SOB_1±.

DS25MB200 Datasheet(PDF) 9 Page - National Semiconductor (TI)

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