RF Micro Devices Inc.

7628 Thorndike Road, Greensboro, NC 27409-9421

DS140428

For sales or technical support, contact RFMD at +1.336.678.5570 or customerservice@rfmd.com.

The information in this publication is believed to be accurate. However, no responsibility is assumed by RF Micro Devices, Inc. ("RFMD") for its use, nor for any infringement of patents or other rights of

third parties resulting from its use. No license is granted by implication or otherwise under any patent or patent rights of RFMD. RFMD reserves the right to change component circuitry, recommended

application circuitry and specifications at any time without prior notice.

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RFVC1843A

Pin Names and Descriptions

Pin

Name

Description

Interface Schematic

1-3

N/C

No internal connection.

4

RFOUT/4

VCO RF output at Fo/4. Externally DC-blocked.

5 V

RFOUT/4

5

GND

Connect to PCB ground.

GND

6

VCC_DIG

Supply voltage input for the integrated frequency divider. Typical

+5V. Ground this pin to disable digital divider and reduce current

consumption by 65mA.

VCC_DIG

7-10

N/C

No internal connection.

11

GND

Connect to PCB ground.

See Pin 5 interface schematic

12

RFOUT/2

VCO RF output at Fo/2. Internally DC-blocked.

RFOUT/2

13-18

N/C

No internal connection.

19

RFOUT

VCO RF output at Fo. Internally DC-blocked.

RFOUT

20

N/C

No internal connection.

21

VCC_OSC

Supply voltage input for the VCO. Typical +5V.

VCC_OSC