MAX3981 データシートの表示（PDF） - Maxim Integrated
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MAX3981 Datasheet PDF : 9 Pages
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3.125Gbps XAUI Quad Cable Equalizer
ELECTRICAL CHARACTERISTICS (continued)
(VCC = +3.0V to +3.6V, input data rate = 3.125Gbps, TA = 0°C to +85°C. Typical values are at VCC = +3.3V and TA = +25°C, unless
otherwise noted.)
PARAMETER
TTL CONTROL PINS
Input High Voltage
Input Low Voltage
Input High Current
Input Low Current
Output High Voltage
Output Low Voltage
SYMBOL
CONDITIONS
Internal 10kΩ pullup
Internal 10kΩ pullup
MIN TYP MAX UNITS
2.0
V
0.8
V
250
µA
500
µA
2.4
V
0.4
V
Note 1: K28.7 pattern is applied differentially at point A as shown in Figure 1.
Note 2: Total jitter does not include the signal source jitter. Total jitter (TJ) = (14.1 ✕ RJ + DJ) where RJ is random RMS jitter and DJ
is maximum deterministic jitter. Signal source is a K28.5± pattern (00 1111 1010 11 0000 0101) for the deterministic jitter
test and K28.7 (0011111000) or equivalent for the random jitter test. Residual jitter is that which remains after equalizing
media-induced losses of the environment of Figure 1 or its equivalent. The deterministic jitter at point B must be from media-
induced loss and not from clock source modulation. Jitter is measured at 0V at point C of Figure 1.
Note 3: Using K28.7 (0011111000) pattern.
Note 4: AC specifications are guaranteed by design and characterization.
A
FR4
SIGNAL
SOURCE
2"
CABLE
≤ 10 FEET
SMA
CONNECTOR
MADISON #14487, 100Ω
SHIELDED TWISTED PAIR
FR4
B
C
2"
SMA
CONNECTOR
MAX3981
IN
OUT
Figure 1. Test Conditions Referenced in the Electrical Characteristics Table
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