STW81100AT datasheet(3/23 Pages) STMICROELECTRONICS

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STW81100

Table 2. Pin Description

Pin No

Name

Description

Observations

VDD_VCO1

VCO power supply

VDD_DIV2

Divider by 2 power supply

VDD_OUTBUF

Output buffer power supply

OUTBUFP

LO buffer positive output

Open collector

OUTBUFN

LO buffer negative output

Open collector

VDD_DIV4

Divider by 4 power supply

VDD_VCO2

VCO power supply

VDD_ESD

ESD positive rail power supply

VCTRL

VCO control voltage

ICP

PLL charge pump output

REXT

External resistance connection for PLL charge

pump

VDD_CP

Power supply for charge pump

TEST1

Test input 1

Used only for testing purpose

LOCK_DET

Lock detector

CMOS Output

TEST2

Test input 2

Used only for testing purpose

REF_IN

Reference frequency input

VDD_PLL

PLL digital power supply

EXTVCO_INN

External VCO negative input

EXTVCO_INP

External VCO positive input

VDD_BUFVCO

VCO buffer power supply

ATPGON

SCAN mode activated

VDD_I2CI2C bus power supply

EXT_PD

Power down hardware

CMOS Input

SDA

I2CBUS data line

CMOS Bidir Schmitt triggered

SCL

I2CBUS clock line

CMOS Input

ADD0

I2CBUS address select pin

CMOS Input

ADD1

I2CBUS address select pin

CMOS Input

ADD2

I2CBUS address select pin

CMOS Input

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