Datasheet

MAX4950A
Dual PCI Express Equalizer/Redriver
_______________________________________________________________________________________ 7
Pin Description
PIN NAME FUNCTION
1, 4, 6, 9, 19,
22, 24, 27
GND Ground
2 INAP Noninverting Input A
3 INAM Inverting Input A
5 EN
Enable Input. Drive EN low for standby mode. Drive EN high for normal mode. EN is internally
pulled down by a 50k (typ) resistor.
7 OUTBP Noninverting Output B
8 OUTBM Inverting Output B
10, 18, 28, 36 N.C. No Connection. Not internally connected.
11, 17, 29, 35 V
CC
Power-Supply Input. Bypass V
CC
to GND with 1μF and 0.01μF capacitors in parallel as close as
possible to the device.
12 ODEB1
Output B Deemphasis Control MSB. ODEB1 is internally pulled down by a 50k (typ) resistor.
See Table 3.
13 ODEB0
Output B Deemphasis Control LSB. ODEB0 is internally pulled down by a 50k (typ) resistor.
See Table 3.
14 O_AMPB Output B Amplitude Selection Input. O_AMPB is internally pulled down by a 50k (typ) resistor.
15 INEQB1
Input B Equalization Control MSB. INEQB1 is internally pulled down by a 50k (typ) resistor.
See Table 2.
16 INEQB0
Input B Equalization Control LSB. INEQB0 is internally pulled down by a 50k (typ) resistor.
See Table 2.
20 INBM Inverting Input B
21 INBP Noninverting Input B
23 RX_DET
Receiver-Detection Control Bit. Toggle RX_DET to initiate receiver detection. RX_DET is
internally pulled down by a 50k (typ) resistor.
25 OUTAM Inverting Output A
26 OUTAP Noninverting Output A
30 ODEA0
Output A Deemphasis Control LSB. ODEA0 is internally pulled down by a 50k (typ) resistor.
See Table 3.
31 ODEA1
Output A Deemphasis Control MSB. ODEA1 is internally pulled down by a 50k (typ) resistor.
See Table 3.
32 O_AMPA Output A Amplitude Selection Input. O_AMPA is internally pulled down by a 50k (typ) resistor.
33 INEQA0
Input A Equalization Control LSB. INEQA0 is internally pulled down by a 50k (typ) resistor.
See Table 2.
34 INEQA1
Input A Equalization Control MSB. INEQA1 is internally pulled down by a 50k (typ) resistor.
See Table 2.
— EP
Exposed Pad. Internally connected to GND. Connect EP to a large ground plane to maximize
thermal performance. EP is not intended as an electrical connection point.