AM79761 datasheet(15/20 Pages) AMD

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Am79761

PRELIMINARY

AC CHARACTERISTICS (Continued)

Figure 22.

Receive Timing Waveform

Table 22.

Receive AC Characteristics

Symbol

Parameter Description

Test Conditions

Min

Max

Unit

Data or COM_DET Valid prior

to RCLK/RCLKN rise

Measured between the 1.4 V

point of RCLK or RCLKN and a

valid level of RXD[0:9]. All

outputs driving 10 pF load.

3.0

—

Data or COM_DET Valid after

RCLK or RCLKN rise

2.0

—

Deviation of RCLK rising edge

to RCLKN rising edge delay

from nominal.

Nominal delay is 10 bit times.

Tested on sample basis

-500

500

Deviation of RCLK, RCLKN

frequency from nominal.

Whether or not locked to serial

data

-1.0

1.0

TR, TF

RXD[0:9], COM_DET, RCLK,

RCLKN rise and fall time

Between VIL(MAX) and VIH(MIN),

into 10 pf load.

—

2.4

Rlat

Latency from RX

± to RXD[0:9]

bc = Bit clock

ns = Nano second

15 bc + 2 ns

34 bc + 2 ns

—

TLOCK

Data acquisition lock time @

1.25 Gbps

8B/10B IDLE pattern.

Tested on a sample basis

—

2.0

µs

Receive Data

Jitter

Receive Data Jitter Power

dBc, RMS for 10-12 Bit Error

Ratio Tested on a sample basis

—40

RCLK

RCLKN

RXD[0:9]

Data Valid

21560A-8

delay

baud

-----------

RCLK

REFCLK

--------------------T

PhaseNoise

100KHz

BitTime

--------------------------------

∫

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