DS1388Z-3+T&R Maxim Integrated Products, DS1388Z-3+T&R Datasheet

DS1388Z-3+T&R

Manufacturer Part Number

DS1388Z-3+T&R

Description

IC RTC I2C W/CHARGER 8-SOIC

Manufacturer

Maxim Integrated Products

Type

Clock/Calendar/Supervisor/EEPROMr

Datasheet

1.DS1388Z-33.pdf (19 pages)

Specifications of DS1388Z-3+T&R

Memory Size

4K (512 x 8)

Time Format

HH:MM:SS:hh (12/24 hr)

Date Format

YY-MM-DD-dd

Interface

I²C, 2-Wire Serial

Voltage - Supply

2.7 V ~ 3.3 V

Operating Temperature

-40°C ~ 85°C

Mounting Type

Surface Mount

Package / Case

8-SOIC (3.9mm Width)

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Current page: 1 of 19
Download datasheet (279Kb)

The DS1388 I

EEPROM is a multifunction device that provides a

clock/calendar, programmable watchdog timer, power-

supply monitor with reset, and 512 bytes of EEPROM.

The clock provides hundredths of seconds, seconds,

minutes, and hours, and operates in 24-hour or 12-hour

format with an AM/PM indicator. The calendar provides

day, date, month, and year information. The date at the

end of the month is automatically adjusted for months

with fewer than 31 days, including corrections for leap

year. A watchdog timer provides a reset for an unre-

sponsive microprocessor. It is programmable in 10ms

intervals from 0.01 to 99.99 seconds. A temperature-

compensated voltage reference and comparator circuit

monitors the status of V

detected, the device automatically switches to the

backup supply and drives the reset output to the active

state. The backup supply maintains time and date

operation in the absence of V

nominal levels, the reset is held low for a period to allow

the power supply and processor to stabilize. The

device also has a pushbutton reset controller, which

debounces a reset input signal. The device is

accessed through an I

19-4984; Rev 3; 8/10

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,

or visit Maxim’s website at www.maxim-ic.com.

Portable Instruments

Point-of-Sale Equipment

Network Interface Cards

Wireless Equipment

TOP VIEW

BACKUP

C real-time clock (RTC), supervisor, and

GND

C RTC/Supervisor with Trickle Charger

C serial interface.

General Description

DS1388

. If a primary power failure is

Pin Configuration

. When V

Applications

______________________________________________ Maxim Integrated Products

RST

SCL

SDA

returns to

and 512 Bytes EEPROM

♦ Fast (400kHz) I

♦ RTC Counts Hundredths of Seconds, Seconds,

♦ Programmable Watchdog Timer

♦ Automatic Power-Fail Detect and Switch Circuitry

♦ Reset Output with Pushbutton Reset Input

♦ 512 x 8 Bits of EEPROM

♦ Integrated Trickle-Charge Capability for Backup

♦ Three Operating Voltages: 5.0V, 3.3V, and 3.0V

♦ Low Timekeeping Voltage Down to 1.3V

♦ -40°C to +85°C Temperature Range

♦ UL Recognized

+ Denotes a lead(Pb)-free/RoHS-compliant package.

DS1388Z-5+

DS1388Z-33+

DS1388Z-3+

Minutes, Hours, Day, Date, Month, and Year with

Leap Year Compensation Valid Up to 2100

Capability

Supply

PART

CPU

RPU = t

RPU

Typical Operating Circuit

-40°C to +85°C 8 SO (150 mils) DS1388-5

-40°C to +85°C 8 SO (150 mils) DS138833

-40°C to +85°C 8 SO (150 mils) DS1388-3

TEMP RANGE PIN-PACKAGE

RPU

C Interface

Ordering Information

SCL

SDA

CRYSTAL

DS1388

GND

BACKUP

RST

Features

MARK

TOP

Related parts for DS1388Z-3+T&R

DS1388Z-3+T&R Summary of contents

Page 1

... Integrated Trickle-Charge Capability for Backup Supply ♦ Three Operating Voltages: 5.0V, 3.3V, and 3.0V ♦ Low Timekeeping Voltage Down to 1.3V ♦ -40°C to +85°C Temperature Range ♦ UL Recognized returns to CC PART DS1388Z-5+ Applications DS1388Z-33+ DS1388Z-3+ + Denotes a lead(Pb)-free/RoHS-compliant package RST 6 SCL CPU ...

Page 2

... Lead Temperature (soldering, 10s) .................................+260° (Note 1) ......40°C/W Soldering Temperature (reflow) .......................................+260°C JC CONDITIONS DS1388Z-5 V (Note 3) DS1388Z-33 CC DS1388Z-3 V (Note (Note (Note 3) DS1388Z-5 V (Note 3) DS1388Z-33 PF DS1388Z-3 CONDITIONS R1 (Notes (Note 6) R3 (Note (Note 8) LORST OLDOUT MIN TYP MAX UNITS 4.5 5 5.5 2 ...

Page 3

... V < OLSIR CC OL 1.3V < V < 1.8V 0 DS1388Z-5 I (Note 9) DS1388Z-33 CCER DS1388Z-3 DS1388Z-5 I (Note 9) DS1388Z-33 CCEW DS1388Z-3 DS1388Z-5 I (Note 10) DS1388Z-33 CCS DS1388Z +25°C (guaranteed by design -40°C to +85°C (guaranteed by A design) CONDITIONS (Note 11) BACKUP (Note 11) _____________________________________________________________________ MIN TYP MAX 3.0 3 ...

Page 4

I C RTC/Supervisor with Trickle Charger and 512 Bytes EEPROM AC ELECTRICAL CHARACTERISTICS ( -40°C to +85°C, unless otherwise noted.) (Note 2) CC CC(MIN) CC(MAX) A PARAMETER SYMBOL SCL Clock Frequency Bus ...

Page 5

I C RTC/Supervisor with Trickle Charger POWER-UP/POWER-DOWN CHARACTERISTICS (T = -40°C to +85°C) (Note 2) (Figures PARAMETER V Detect to Recognize Inputs CC (V Rising Fall Time PF(MAX) PF(MIN) V ...

Page 6

I C RTC/Supervisor with Trickle Charger and 512 Bytes EEPROM WARNING: Under no circumstances are negative undershoots, of any amplitude, allowed when device is in write protection. Note 2: Limits at -40°C are guaranteed by design and are not ...

Page 7

I C RTC/Supervisor with Trickle Charger (V = +3.3V +25°C, unless otherwise noted SUPPLY CURRENT VOLTAGE BACKUP vs. V BACKUP 500 450 400 350 300 250 1.3 1.7 2.1 2.5 ...

Page 8

I C RTC/Supervisor with Trickle Charger and 512 Bytes EEPROM PIN NAME Connections for a Standard 32.768kHz Quartz Crystal. The internal oscillator circuitry is designed for 1 X1 operation with a crystal having a specified load capacitance (C oscillator ...

Page 9

I C RTC/Supervisor with Trickle Charger Detailed Description 2 The DS1388 I C RTC, supervisor, and EEPROM is a multifunction device that provides a clock/calendar, programmable watchdog timer, power-supply monitor with reset, and 512 bytes of EEPROM. The clock ...

Page 10

I C RTC/Supervisor with Trickle Charger and 512 Bytes EEPROM LOCAL GROUND PLANE (LAYER 2) NOTE: AVOID ROUTING SIGNAL LINES IN THE CROSSHATCHED AREA (UPPER LEFT QUADRANT) OF THE PACKAGE UNLESS THERE IS A GROUND PLANE BETWEEN THE SIGNAL ...

Page 11

I C RTC/Supervisor with Trickle Charger ADDRESS BIT 7 BIT 6 BLK WORD 0h 00h Tenth Seconds 0h 01h 0 10 Seconds 0h 02h 0 10 Minutes 0h 03h 0 12/24 0h 04h 05h 0 0 ...

Page 12

I C RTC/Supervisor with Trickle Charger and 512 Bytes EEPROM Watchdog Alarm Counter The contents of the watchdog alarm counter, which is a separate two-byte BCD down counter, are accessed in the address range 08h–09h in block 0h. It ...

Page 13

I C RTC/Supervisor with Trickle Charger BIT 7 BIT 6 BIT 5 EOSC 0 Control Register (00Ch) Bit 7: Enable Oscillator (EOSC). When set to logic 0, the oscillator is started. When set to logic 1, the oscillator is ...

Page 14

I C RTC/Supervisor with Trickle Charger and 512 Bytes EEPROM TRICKLE-CHARGE REGISTER (00Ah) BIT 6 BIT 5 BIT 4 BIT 7 TCS3 TCS2 TCS1 TCS0 SELECT NOTE: ONLY 1010b ENABLES CHARGER V CC Figure 5. Programmable ...

Page 15

I C RTC/Supervisor with Trickle Charger Each data transfer is initiated with a START condition and terminated with a STOP condition. The number of data bytes transferred between the START and the STOP conditions is not limited, and is ...

Page 16

I C RTC/Supervisor with Trickle Charger and 512 Bytes EEPROM Device Addressing The slave address byte is the first byte received follow- ing the START condition from the master device. The slave address byte consists of a 4-bit control ...

Page 17

I C RTC/Supervisor with Trickle Charger Acknowledge Polling Since the DS1388 does not acknowledge during an EEPROM write cycle, acknowledge polling can be used to determine when the cycle is complete (this feature can be used to maximize bus ...

Page 18

I C RTC/Supervisor with Trickle Charger and 512 Bytes EEPROM <SLAVE ADDRESS> <R/W> <DATA (n)> S 1101BBB 1 A XXXXXXXX B - BLOCK SELECT MASTER TO SLAVE S - START A - ACKNOWLEDGE (ACK STOP A - ...

Page 19

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 19 © 2010 Maxim Integrated Products is a registered trademark of Maxim Integrated Products, Inc ...

Related keywords

ds1386
ds1388
ds1384
ds1388z-5
DS1388Z-3+T&R datasheet
DS1388Z-3+T&R data sheet
DS1388Z-3+T&R pdf datasheet
DS1388Z-3+T&R component
DS1388Z-3+T&R part
DS1388Z-3+T&R distributor
DS1388Z-3+T&R RoHS
DS1388Z-3+T&R datasheet download