MAX14950A Datasheet, PDF (16/20 Pages) Maxim Integrated Products – Single-Lane PCIe Equalizer/Redriver

MAX14950A
Single-Lane PCIe Equalizer/Redriver
Functional Diagram
EN RXDET
OEQ_2
INEQ_0
INEQ_1
IN_P
IN_M
RHI
ELECTRICAL IDLE
DETECTOR
RECEIVER DETECT
MANAGER
OUTPUT
ENABLE
OUT_P
OUT_M
MAX14950A
OEQ_0
OEQ_1
Detailed Description
The MAX14950A dual equalizer/redriver supports Gen
III (8GT/s), Gen II (5GT/s), and Gen I (2.5GT/s) PCIe
data rates. The device contains two identical drivers
with idle/receive detect on each lane and equalization/
deemphasis/preshoot to compensate for circuit board
loss. Programmable input equalization circuitry reduces
deterministic jitter, improving signal integrity. The device
features programmable output deemphasis/preshoot,
permitting optimal placement of key PCIe components
and longer runs of stripline, microstrip, or cable.
Programmable Input Equalization
Programmable input equalization for channel A is con-
trolled by two bits: INEQA1 and INEQA0 and for channel
B is controlled by two bits: INEQB1 and INEQB0 (Table 1.)
Table 1. Input Equalization
INEQ_1
0
0
1
1
INEQ_0
0
1
0
1
INPUT EQUALIZATION (dB)
5
8
12
16
Maxim Integrated
  16