DS1371 Datasheet, PDF (1/14 Pages) Maxim Integrated Products – 2-Wire, 32-Bit Binary Counter Watchdog Clock

www.maxim-ic.com
DS1371
2-Wire, 32-Bit Binary Counter
Watchdog Clock
General Description
The DS1371 is a 32-bit binary counter that is
designed to continuously count time in seconds.
An additional counter that can generate a
periodic alarm or serve as a watchdog timer is
also provided. If enabled as a watchdog timer,
the watchdog strobe input pin provides a
hardware reset of the counter. If disabled, this
counter can be used as 3 Bytes of general-
purpose RAM. A configurable output can be
used as an interrupt or provide a square wave at
one of four selectable frequencies. The device is
programmed serially through a 2-wire
bidirectional bus.
Applications
Servers
Point-of-Sale Equipment
Portable Instruments
Elapsed Time Measurements
Features
§ 32-Bit Binary Counter
§ 24-Bit Binary Counter Provides Periodic
Alarm, Watchdog Timer, or RAM
§ Strobe Input to Reset Watchdog Timer
§ Single Output Configurable as Interrupt or
Square Wave
§ 2-Wire Serial Interface
§ Low-Voltage Operation
§ Operating Temperature Range:
-40°C to +85°C
§ Available in 8-Pin mSOP
Ordering Information
PART
TEMP RANGE
PIN-
PACKAGE
DS1371U
-40°C to +85°C 8 µSOP
TOP
MARK
DS1371
Pin Configuration
Typical Operating Circuit
TOP VIEW
X1
X2
WDS
GND
1
8
2
7
DS1371
3
6
4
5
VCC
SQW/INT
SCL
SDA
µSOP
Note: Some revisions of this device may incorporate deviations from published specifications known as errata. Multiple revisions of any device
may be simultaneously available through various sales channels. For information about device errata, click here: www.maxim-ic.com/errata.
1 of 14
REV: 051203