SI5341_16 datasheet(43/53 Pages) SILABS

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Pin Name

Pin Number

Pin Type1

Function

Si5341

Si5340

—

No Connect. These pins are not connected to the die. Leave dis-

connected.

Power

VDD

Core Supply Voltage. The device core operates from a 1.8 V

supply. A 1.0 µf bypass capacitor is recommended.

—

VDDA

Core Supply Voltage 3.3 V. This core supply pin requires a 3.3 V

power source. A 1.0 µf bypass capacitor is recommended.

—

VDDS

—

Status Output Voltage. The voltage on this pin determines the

VOL/VOH on LOLb and LOS_XAXBb status output pins. A 0.1 µf to

1.0 µf bypass capacitor is recommended.

VDDO0

Output Clock Supply Voltage 0–9. Supply voltage (3.3 V, 2.5 V,

1.8 V) for OUTx, OUTx outputs. See the Si5341/40 Family Refer-

ence Manual for power supply filtering recommendations. Leave

VDDO pins of unused output drivers unconnected. An alternate

option is to connect the VDDO pin to a power supply and disable

the output driver to minimize current consumption.

VDDO1

VDDO2

VDDO3

VDDO4

—

VDDO5

—

VDDO6

—

VDDO7

—

VDDO8

—

VDDO9

—

GND PAD

Ground Pad This pad provides electrical and thermal connection

to ground and must be connected for proper operation. Use as

many vias as practical and keep the via length to an internal

ground plan as short as possible.

Note:

1. I = Input, O = Output, P = Power.

2. The IO_VDD_SEL control bit (0x0943 bit 0) selects 3.3 V or 1.8 V operation.

3. The voltage on the VDDS pin(s) determines 3.3 V or 1.8 V operation.

4. Refer to the Family Reference Manual for more information on register setting names.

5. All status pins except I2C and SPI are push-pull.

Si5341/40 Rev D Data Sheet

Pin Descriptions

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Rev. 1.0 | 42

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