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DS1338Z-18+

Description
I2C RTC with 56-Byte NV RAM
CategoryThe embedded processor and controller    Microcontrollers and processors   
File Size226KB,16 Pages
ManufacturerMaxim
Websitehttps://www.maximintegrated.com/en.html
Environmental Compliance
Download Datasheet Parametric View All

DS1338Z-18+ Overview

I2C RTC with 56-Byte NV RAM

DS1338Z-18+ Parametric

Parameter NameAttribute value
Is it lead-free?Lead free
Is it Rohs certified?conform to
MakerMaxim
Parts packaging codeSOIC
package instructionSOP, SOP8,.25
Contacts8
Reach Compliance Codecompliant
ECCN codeEAR99
Factory Lead Time6 weeks
Is SamacsysN
maximum clock frequency0.032 MHz
External data bus width
Information access methodsI2C
interrupt capabilityN
JESD-30 codeR-PDSO-G8
JESD-609 codee3
length4.9 mm
Humidity sensitivity level1
Number of terminals8
Number of timers1
Maximum operating temperature85 °C
Minimum operating temperature-40 °C
Package body materialPLASTIC/EPOXY
encapsulated codeSOP
Encapsulate equivalent codeSOP8,.25
Package shapeRECTANGULAR
Package formSMALL OUTLINE
Peak Reflow Temperature (Celsius)260
power supply1.8 V
Certification statusNot Qualified
Maximum seat height1.75 mm
Maximum supply voltage5.5 V
Minimum supply voltage1.71 V
Nominal supply voltage1.8 V
surface mountYES
technologyCMOS
Temperature levelINDUSTRIAL
Terminal surfaceMatte Tin (Sn)
Terminal formGULL WING
Terminal pitch1.27 mm
Terminal locationDUAL
shortest timeSECONDS
Maximum time at peak reflow temperatureNOT SPECIFIED
VolatileNO
width3.9 mm
uPs/uCs/peripheral integrated circuit typeTIMER, REAL TIME CLOCK
Base Number Matches1
DS1338
I
2
C RTC with 56-Byte NV RAM
GENERAL DESCRIPTION
The DS1338 serial real-time clock (RTC) is a low-
power, full binary-coded decimal (BCD)
clock/calendar plus 56 bytes of NV SRAM. Address
and data are transferred serially through an I
2
C
interface. The clock/calendar provides seconds,
minutes, hours, day, date, month, and year
information. The end of the month date is
automatically adjusted for months with fewer than 31
days, including corrections for leap year. The clock
operates in either the 24-hour or 12-hour format with
AM/PM indicator. The DS1338 has a built-in power-
sense circuit that detects power failures and
automatically switches to the backup supply,
maintaining time and date operation
BENEFITS AND FEATURES
Completely Manages All Timekeeping
Functions
o
RTC Counts Seconds, Minutes, Hours,
Date of the Month, Month, Day of the
Week, and Year with Leap-Year
Compensation Valid Up to 2100
o
56-Byte, Battery-Backed, General-
Purpose RAM with Unlimited Writes
o
Programmable Square-Wave Output
Signal
Surface-Mount Package with an Integrated
Crystal (DS1338C) Saves Additional Space
and Simplifies Design
Interfaces with Most Microcontrollers
o
I
2
C Serial Interface
Low-Power Operation Extends Battery
Backup Run Time
o
Automatic Power-Fail Detect and Switch
Circuitry
-40°C to +85°C Industrial Temperature Range
Supports Operation in a Wide Range of
Applications
Underwriters Laboratories (UL®) Recognized
APPLICATIONS
Handhelds (GPS, POS Terminal)
Consumer Electronics (Set-Top Box, Digital
Recording, Network Appliance)
Office Equipment (Fax/Printer, Copier)
Medical (Glucometer, Medicine Dispenser)
Telecommunications (Router, Switcher, Server)
Other (Utility Meter, Vending Machine, Thermostat,
Modem)
UL is a registered trademark of Underwriters Laboratories Inc.
ORDERING INFORMATION
PART
DS1338Z-18+
DS1338Z-3+
DS1338Z-33+
DS1338U-18+
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
8 SO (0.150″)
8 SO (0.150″)
8 SO (0.150″)
8
µSOP
8
µSOP
8
µSOP
TOP MARK†
DS1338-18
DS1338-3
DS133833
1338
rr-18
1338
rr-3
1338
rr-33
DS1338C-18
DS1338C-3
DS1338C-33
TYPICAL OPERATING CIRCUIT
R
PU
= t
r
/C
b
V
CC
CRYSTAL
R
PU
V
CC
DS1338U-3+
DS1338U-33+
X1
SCL
X2
V
CC
SQW/OUT
i
V
CC
R
PU
CPU
SDA
DS1338
V
BAT
GND
Pin Configurations appear at end of data sheet.
DS1338C-18#
-40°C to +85°C
16 SO (0.300″)
DS1338C-3#
-40°C to +85°C
16 SO (0.300″)
DS1338C-33#
-40°C to +85°C
16 SO (0.300″)
rr = second line, revision level
+ Denotes a lead(Pb)-free/RoHS-compliant device.
# Denotes a RoHS-compliant device that may include lead that is
exempt under the RoHS requirements. The lead finish is JESD97
category e3, and is compatible with both lead-based and lead-free
soldering processes.
A “+” anywhere on the top mark denotes a lead-free device. A “#”
denotes a RoHS-compliant device.
19-6019; Rev 4/15
1 of 16
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