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062299

FEATURES

§ Real-Time Clock with fully compatible

1-Wire MicroLAN interface

§ Uses the same binary time/date representation

as the DS2404 but with 1 second resolution

§ Clock accuracy

±2 minutes per month

at 25°C

§ Programmable interrupt output for system

wakeup

§ Communicates at 16.3k bits per second

§ Unique, factory-lasered and tested 64-bit reg-

istration number (8-bit family code + 48-bit

serial number + 8-bit CRC tester) assures ab-

solute traceability because no two parts are

alike

§ 8-bit family code specifies device communi-

cation requirements to bus master

§ Built-in multidrop controller ensures com-

patibility with other MicroLAN products

§ Operates over a wide V

2.5V to 5.5V from -40°C to +85°C

§ Low power, 200 nA typically with oscillator

running

§ Compact, low cost 6-pin TSOC surface

mount package

PIN ASSIGNMENT

6-PIN TSOC PACKAGE

TOP VIEW

1

2

3

6

5

4

SIDE VIEW

See Mech. Drawings

Section

PIN DESCRIPTION

Pin 1

GND

Pin 2

1-Wire

Pin 3

INT

Pin 4

Pin 5

X1

Pin 6

X2

ORDERING INFORMATION

DS2417P 6-pin TSOC package

DS2417V Tape & Reel of DS2417P

DS2417X Chip Scale Pkg., Tape & Reel

DESCRIPTION

The DS2417 1-Wire Time Chip with Interrupt offers a simple solution for storing and retrieving vital

time information with minimal hardware. The DS2417 contains a unique lasered ROM and a real-time

clock/calendar implemented as a binary counter. Only one pin is required for communication with the

device. Utilizing a backup energy source, the data is nonvolatile and allows for stand-alone operation.

The DS2417 features can be used to add functions such as calendar, time and date stamp, and logbook to

any type of electronic device or embedded application that uses a microcontroller.

OVERVIEW

The DS2417 has two main data components: 1) 64-bit lasered ROM, and 2) real-time clock counter

(Figure 1). The real-time clock utilizes an on-chip oscillator that is connected to an external 32.768 kHz

crystal. The hierarchical structure of the 1-Wire protocol is shown in Figure 2. The bus master must first

provide one of four ROM function commands: 1) Read ROM, 2) Match ROM, 3) Search ROM, 4) Skip

ROM. The protocol for these ROM functions is described in Figure 7. After a ROM function command

DS2417

1-Wire

PRELIMINARY

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