SY75608 datasheet(16/44 Pages) MICROCHIP

16 / 44 page

SY75608/612

DS20006363D-page 16

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2021 - 2023 Microchip Technology Inc. and its subsidiaries

OE_TYPE0

/I2C_SCL

IPD/O

Output Signal Type or I2C Bus Clock

When SEL pin is low this pin and pin 42 selects output type.

OE_TYPE1

OE_TYPE0

Output [7:0] state when OE_n is

high

Both p and n are pulled low via

internal output termination resistors

per standard HCSL (PCIe)

Drive Differential Low: p is pulled low

and n is pulled high via output

termination resistors

Reserved

High-Z (disabled)

When SEL pin is high this pin is I2C Bus Clock. This pin is pulled down

with 100 kΩ resistor when SEL is low.

OE_TYPE1/

I2C_SDA

IPD/OOD

Output Signal Type or I2C Bus I/O Data

When SEL pin is low, this pin and pin 43 selects output type.

When SEL pin is high, this pin is an I/O pin (Input/Open-Drain) for I2C

Bus.

This pin is pulled down with 100 kΩ resistor when SEL is low.

OE0b

IPD

Output Enable Control

When the SEL pin is low and OEnb is low, the output n where n = {0,..,7}

is active.

When the SEL pin is low and OEnb is high, the output is dependent on

OE_TYPE0/1 pins

OEnb is synchronous and it need four clock cycles before the

corresponding output gets enabled/disabled.

OEnb pins are pulled-down with 100 kΩ resistor.

OE1b

OE2b

OE3b

OE4b

OE5b

OE6b

OE7b

XIN

Crystal Oscillator Input or Crystal Bypass Mode or Crystal

Overdrive Mode

If crystal circuit is not used, pull-down this pin or connect it to ground.

XOUT

Crystal Oscillator Output

SEL

IPD

Select Control

When this pin is low, the device is controlled via hardware pins,

IN_SEL0/1 and OE_TYPE0/1.

When this pin is high, the device is controlled via I2C Bus port.

Any change of SEL pin value requires power cycle. Hence, SEL pin

cannot be changed on the fly.

This pin is pulled down with 100 kΩ resistor.

OUT_IMP_SEL

IPD

Output Impedance Select

When this pin is low, the output differential impedance is 100Ω

When this pin is high, the output differential impedance is 85Ω

This pin is pulled down with 100 kΩ resistor.

VDD

Positive Supply Voltage

Connect to 3.3V, 2.5V, or 1.8V supply.

TABLE 3-1:

SY75608 PIN FUNCTION TABLE (CONTINUED)

Pin Number

Pin Name

Pin Type

Description

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