SAS/SATA Single Lane 2:1/1:2 Multiplexer/

Demultiplexer Plus Redriver with Equalization

8

Pin Description (continued)

PIN

NAME

FUNCTION

15

MODEA

INAP/INAM OOB-Mode Logic Input. Drive MODEA low or leave unconnected for SAS OOB thresh-

old. Drive MODEA high for SATA OOB threshold. MODEA is internally pulled down by a 330kI

(typ) resistor.

16

MODEB

INBP/INBM OOB-Mode Logic Input. Drive MODEB low or leave unconnected for SAS OOB thresh-

old. Drive MODEB high for SATA OOB threshold. MODEB is internally pulled down by a 330kI

(typ) resistor.

18

OAMP

OUTP/OUTM Output Level Selection. Drive OAMP high for low output amplitude. Drive OAMP low

or leave unconnected for high output amplitude. See the Electrical Characteristics table. OAMP is

internally pulled down by a 330kI (typ) resistor.

19

OUTPE

OUTP/OUTM Output Preemphasis Logic Input. Drive OUTPE low or leave unconnected for no out-

put preemphasis. Drive OUTPE high for 3dB (typ) output preemphasis. OUTPE is internally pulled

down by a 330kI (typ) resistor.

20

EQB

INBP/INBM Input Equalization Logic Input. Drive EQB low or leave unconnected for no input equal-

ization. Drive EQB high for 4dB (typ) input equalization. EQB is internally pulled down by a 330kI

(typ) resistor.

21

EQA

INAP/INAM Input Equalization Logic Input. Drive EQA low or leave unconnected for no input equal-

ization. Drive EQA high for 4dB (typ) input equalization. EQA is internally pulled down by a 330kI

(typ) resistor.

24

INBM

Channel 2 Inverting Input B

25

INBP

Channel 2 Noninverting Input B

27

INAM

Channel 2 Inverting Input A

28

INAP

Channel 2 Noninverting Input A

30

EN

Active-Low Enable Input. Drive EN high or leave unconnected for reduced power standby mode.

Drive EN low for normal operation. See Table 1. EN is internally pulled up by a 330kI (typ) resistor.

32

OUTBM

Channel 1 Inverting Output B

33

OUTBP

Channel 1 Noninverting Output B

35

OUTAM

Channel 1 Inverting Output A

36

OUTAP

Channel 1 Noninverting Output A

39

PEA

OUTAP/OUTAM Output Preemphasis Logic Input. Drive PEA low or leave unconnected for no out-

put preemphasis. Drive PEA high for 3dB (typ) output preemphasis. PEA is internally pulled down

by a 330kI (typ) resistor.

40

PEB

OUTBP/OUTBM Output Preemphasis Logic Input. Drive PEB low or leave unconnected for no out-

put preemphasis. Drive PEB high for 3dB (typ) output preemphasis. PEB is internally pulled down

by a 330kI (typ) resistor.

41

INEQ

INP/INM Input Equalization Logic Input. Drive INEQ low or leave unconnected for no input equaliza-

tion. Drive INEQ high for 4dB (typ) input equalization. INEQ is internally pulled down by a 330kI

(typ) resistor.

42

MODE

INP/INM OOB-Mode Logic Input. Drive MODE low or leave unconnected for SAS OOB threshold.

Drive MODE high for SATA OOB threshold. MODE is internally pulled down by a 330kI (typ)

resistor.

—

EP

Exposed Pad. Internally connected to GND. Connect EP to a large ground plane to maximize ther-

mal performance.