MAX14955 Datasheet, PDF (4/19 Pages) Maxim Integrated Products – Computer on Modules

MAX14955
Single-Lane PCIe Gen III Redriver
with Equalization and Extended
Temperature Operation
Electrical Characteristics (continued)
(V_CC = +3.0V to +3.6V, C_CL = 200nF coupling capacitor on each output, R_L = 50Ω on each output, T_A = -40°C to +85°C, unless otherwise
noted. Typical values are at V_CC = +3.3V and T_A = +25°C.) (Note 3)
PARAMETER
AC PERFORMANCE (Note 4)
Input Return Loss, Differential
Input Return Loss, Common
Mode
Output Return Loss, Differential
Output Return Loss, Common
Mode
Redriver-Operation Differential
Input-Signal Range
Full-Swing Differential Output
Voltage (No Deemphasis)
Output Deemphasis Ratio, 0dB
SYMBOL
CONDITIONS
RL_RX-DIFF
RL_RX-CM
RL_TX-DIFF
RL_TX-CM
V_RX-DIFF-
PP
V_TX-DIFF-
PP
V_TX-DE-
RATIO-0dB
f = 0.05GHz to 1.25GHz
f = 1.25GHz to 2.5GHz
f = 2.5GHz to 4GHz
f = 0.05GHz to 2.5GHz
f = 2.5GHz to 4GHz
f = 0.05GHz to 1.25GHz
f = 1.25GHz to 2.5GHz
f = 2.5GHz to 4GHz
f = 0.05GHz to 2.5GHz
f = 2.5GHz to 4GHz
2 x |(V_{OUT_P} - V_{OUT_M})|,
OEQ_2 = OEQ_1 = OEQ_0 = GND
OEQ_2 = OEQ_1 = OEQ_0 = GND,
Figure 1
MIN TYP MAX UNITS
9
dB
8
dB
5
dB
6
dB
4
dB
10
dB
8
dB
4
dB
6
dB
4
dB
100
1200 mV_P-P
800 1000 1400 mV_P-P
0
dB
Output Deemphasis Ratio, 3.5dB
V_TX-DE-
RATIO-3.5dB
OEQ_2 = OEQ_1 = GND, OEQ_0 = V_CC,
Figure 1
3.5
dB
Output Deemphasis Ratio, 6dB
V_TX-DE- OEQ_2 = OEQ_0 = GND, OEQ_1 = V_CC,
RATIO-6dB ^{Figure 1}
6
dB
Output Deemphasis Ratio, 6dB
with Higher Amplitude
V_TX-DE-HA- OEQ_2 = GND, OEQ_1 = OEQ_0 = V_CC,
RATIO-6dB ^{Figure 1}
6
dB
Output Deemphasis Ratio, 3.5dB V_TX-DE-PS- OEQ_2 = V_CC, OEQ_1 = OEQ_0 = GND,
with Preshoot
RATIO-3.5dB ^{Figure 1}
3.5
dB
Output Deemphasis Ratio, 6dB
with Preshoot
V_TX-DE-PS- OEQ_2 = OEQ_0 = V_CC, OEQ_1 = GND,
RATIO-6dB ^{Figure 1}
6
dB
Output Deemphasis Ratio, 9dB
with Preshoot
V_TX-DE-PS- OEQ_2 = OEQ_1 = V_CC, OEQ_0 = GND,
RATIO-9dB ^{Figure 1}
9
dB
Output Deemphasis Ratio,
9dB with Preshoot and Higher
Amplitude
V_TX-DE-PS-
HA-RATIO-
9dB
OEQ_2 = OEQ_1 = OEQ_0 = V_CC,
Figure 1
9
dB
Input Equalization, 5dB
V_RX-EQ-5dB INEQ_1 = INEQ_0 = GND (Note 5)
5
dB
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