F1956 datasheet(18/24 Pages) RENESAS

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F1956

7-Bit 0.25 dB Wideband Digital Step Attenuator

PIN DESCRIPTION

Name

Function

DNC

This pin must be left open.

VDD

Main Supply. Use 3.3 V or 5 V. Bypass capacitor as close to pin as possible.

VMODE1

Logic low for parallel mode. Logic high or NC for serial mode.

A02

Address bit A0 connection.

GND

Connect directly to paddle ground or as close as possible to pin with thru

via. This pin is not internally connected

GND

Connect directly to paddle ground or as close as possible to pin with thru

via.

RF13

Device RF input or output (bi-directional). AC couple to this pin unless 0V

DC.

8 – 17

GND

Connect each pin directly to paddle ground or as close as possible to pin

with thru vias.

RF23

Device RF input or output (bi-directional). AC couple to this pin unless 0V

DC.

GND

Connect directly to paddle ground or as close as possible to pin with thru

via.

No internal connection. These pins can be left unconnected, voltage

applied, or connected to ground (recommended).

A22

Address bit A2 connection

A12

Address bit A1 connection.

LE1

Serial interface latch enable input.

CLK1

Serial interface clock input.

DATA1

Serial interface data input.

D61

Parallel control bit, 16 dB. Ground pin if not used.

D51

Parallel control bit, 8 dB. Ground pin if not used.

D41

Parallel control bit, 4 dB. Ground pin if not used.

D31

Parallel control bit, 2 dB. Ground pin if not used.

D21

Parallel control bit, 1 dB. Ground pin if not used.

D11

Parallel control bit, 0.5 dB. Ground pin if not used.

D01

Parallel control bit, 0.25 dB. Ground pin if not used.

Exposed

Paddle

Connect to Ground with multiple vias for good thermal and RF performance.

F1956 Datasheet(PDF) 18 Page - Renesas Technology Corp

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