LTC4331 datasheet(7/22 Pages) AD

7 / 22 page

LTC4332

Rev. A

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SS2 (Pin 12): Remote Slave Select 2 (Active Low). When

in local mode, SS2 is an input. Set SS2 low to initiate a

remote SPI transfer using pins SCK, MOSI, and MISO.

When in remote mode, SS2 is an output and can be con-

nected to a remote SPI device’s slave or chip select input.

SS2 must be set high when the SPI bus is idle. SS2 is

weakly pulled to VL and can be unconnected if not used.

SS3 (Pin 13): Remote Slave Select 3 (Active Low). When

in local mode, SS3 is an input. Set SS3 low to initiate a

remote SPI transfer using pins SCK, MOSI, and MISO.

When in remote mode, SS3 is an output and can be con-

nected to a remote SPI device’s slave or chip select input.

SS3 must be set high when the SPI bus is idle. SS3 is

weakly pulled to VL and can be unconnected if not used.

SPEED1 (Pin 14): Link and Interface Timing Select 1.

SPEED1 is a 3-State input and in conjunction with SPEED2

selects link baud rate and the remote SCK timing parame-

ters. Set to high, low, or float as defined in Table 2.

SPEED2 (Pin 15): Link and Interface Timing Select 2.

SPEED2 is a 3-State input and in conjunction with SPEED1

selects link baud rate and the remote SCK timing parame-

ters. Set to high, low, or float as defined in Table 2.

GND (Pin 16, 21): Connect to GND.

Link (Referenced to GND and VCC)

Y (Pin 17): Non-inverting Link Driver Output. Connect to

the A pin of a second LTC4332 device set to the opposite

mode.

Z (Pin 18): Inverting Link Driver Output. Connect to the B

pin of a second LTC4332 device set to the opposite mode.

B (Pin 19): Inverting Link Receiver Input. Connect to the

Z pin of the second LTC4332 device set to the opposite

mode.

A (Pin 20): Non-inverting Link Receiver Input. Connect

to the Y pin of the second LTC4332 device set to the

opposite mode.

PIN FUNCTIONS

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