X68C datasheet(3/18 Pages) NSC

3 / 18 page

Pin Descriptions

MSOP

Pin No.

Symbol

Type

Description

Supply

Power supply input. Must be decoupled to GND.

OUTA

Analog Output

Channel A Analog Output Voltage.

OUTB

Analog Output

Channel B Analog Output Voltage.

OUTC

Analog Output

Channel C Analog Output Voltage.

OUTD

Analog Output

Channel D Analog Output Voltage.

GND

Ground

Ground reference for all on-chip circuitry.

REFIN

Analog Input

Unbuffered reference voltage shared by all channels.

Must be decoupled to GND.

Digital Input

Serial Data Input. Data is clocked into the 16-bit shift

SYNC.

SYNC

Digital Input

Frame synchronization input for the data input. When this

pin goes low, it enables the input shift register and data is

transferred on the falling edges of SCLK. The DAC is

updated on the 16th clock cycle unless SYNC is brought

high before the 16th clock, in which case the rising edge

of SYNC acts as an interrupt and the write sequence is

ignored by the DAC.

SCLK

Digital Input

Serial Clock Input. Data is clocked into the input shift

X68C Datasheet(PDF) 3 Page - National Semiconductor (TI)

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