DS1722

2 of 14

ORDERING INFORMATION Table 1

PART

MARKING

DESCRIPTION

DS1722S

DS1722

DS1722 in 150mil 8-Pin SO

DS1722S/T&R

DS1722

DS1722 in 150mil 8-Pin SO, 2500 Piece Tape-and-

Reel

DS1722S+

DS1722 (See

note)

DS1722 in Lead-Free 150mil 8-Pin SO

DS1722S+T&R

DS1722 (See

note)

DS1722 in Lead-Free 150mil 8-Pin SO, 2500 Piece

Tape-and-Reel

DS1722U

1722

DS1722 in 8-Pin µMAX

DS1722U/T&R

1722

DS1722 in 8-Pin µMAX, 3000 Piece Tape-and-

Reel

DS1722U+

1722 (See note)

DS1722 in Lead-Free 8-Pin µMAX

DS1722U+T&R 1722 (See note)

DS1722 in Lead-Free 8-Pin µMAX, 3000 Piece

Tape-and-Reel

Note: A “+” will also be marked on the package next to the pin 1 indicator.

DETAILED PIN DESCRIPTION

Table 2

SOIC

SYMBOL

DESCRIPTION

PIN 1

Digital Supply Voltage 1.8V-5.5V. Defines the top rails for the digital

inputs and outputs.

PIN 2

CE

Chip Enable Must be asserted high for communication to take place for

either the SPI or 3-wire interface.

PIN 3

SCLK

Serial Clock Input Used to synchronize data movement on the serial

interface for either the SPI or 3-wire interface.

PIN 4

GND

Ground pin.

PIN 5

SDO

Serial Data Output When SPI communication is selected, the SDO pin is

the serial data output for the SPI bus. When 3-wire communication is

selected, this pin must be tied to the SDI pin (the SDI and SDO pins function

as a single I/O pin when tied together.)

PIN 6

SDI

Serial Data Input When SPI communication is selected, the SDI pin is the

serial data input for the SPI bus. When 3-wire communication is selected,

this pin must be tied to the SDO pin (the SDI and SDO pins function as a

single I/O pin when tied together.)

PIN 7

SERMODE

Serial Interface Mode Input This pin selects which interface standard will

GND.

PIN 8

Analog Supply Voltage 2.65V – 5.5V input power pin.