ACS411CS datasheet(39/43 Pages) SEMTECH

39 / 43 page

ACS411CS PRE-RELEASE Issue 6.0 July 1999.

Pin Description of interface signals between ACS9020 and ACS4110.

Pin Description ACS9020 part 1.

Sym

Name

Description

LEDRX

LED receive

Set Logic High or Low.

2PINRX

PINP/PINN

Receive

Set Logic High or Low.

XIN

XOUT

System Clock

Crystal

External crystal with 20pF

padding capacitor.

Frequency set

PLL rate select.

PLLVDD

VDD for

VCO

Power supply, 4.75 - 5.25

Volts.

GND2

GND

Power supply.

RPLL

PLL reference

resistor

62K

Ω to GND

ENPLL

PLL Enable

Set Logic High or Low.

DINP

PLL Positive

input data

Connect to DOUTN.

DINN

PLL Negative

input data

Connect to DOUTP.

DOUTP

Receiver

Positive output

data

Connect to DINN (220

Ω to

GND if IDOUT floating).

DOUTN

Receiver

Negative

output data

Connect to DINP (220

Ω to

GND if IDOUT floating).

IDOUT

Reference

current for

Data output

Ω to VDD (or float if using

external differential o/p loads).

ICOFF

Bias current

for automatic

offset

compensation

windowing

100K

Ω to RXVDD1 to give

COFFWIN delay of 60ns.

CBTSTRP

Auto offset

compensation

bootstrap

capacitor

10nF to GND to give 2ms

bootstrap delay (ICOFF =

100K

Ω).

COFFWIN

Auto output

generated

window output

Connect to ENCOFFB for auto

windowing.

ENCOFFB

Receiver offset

compensation

enable

Connect o COFFWIN for auto

windowing.

ENRXB

Receiver

enable

Set to Logic High or Low.

RXFLAG

Receiver signal

monitor flag

Use to drive external monitor

LED.

RXMON

Receiver signal

monitor

Ω potentiometer to GND to

adjust RXFLAG threshold

RXGND

Ground

Power supply.

RXVDD1

Receive power

supply

Power supply, 4.75 - 5.25

Volts.

Sym

Name

Description

132

ENTX

Enable

Transmit

Transmit active (ACS4110).

Enable transmit (ACS9020).

110

RXDATN

Receive data

Negative differential receive

data in (or slicing level in for

RXDATP).

109

RXDATP

Receive data

Positive receive data in.

107

TXDATN

Transmit data

Negative differential transmit

data in (or slicing level in for

TXDATP).

106

TXDATP

Transmit data

Positive transmit data out.

ACS411CS Datasheet(PDF) 39 Page - Semtech Corporation

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