ISL12020MIRZ Intersil, ISL12020MIRZ Datasheet

IC RTC/CALENDAR TEMP SNSR 20-DFN

ISL12020MIRZ

Manufacturer Part Number
ISL12020MIRZ
Description
IC RTC/CALENDAR TEMP SNSR 20-DFN
Manufacturer
Intersil
Type
Clock/Calendarr
Datasheet

Specifications of ISL12020MIRZ

Memory Size
1K (128 x 8)
Time Format
HH:MM:SS (12/24 hr)
Date Format
YY-MM-DD-dd
Interface
I²C, 2-Wire Serial
Voltage - Supply
2.7 V ~ 5.5 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
20-DFN
Lead Free Status / RoHS Status
Lead free / RoHS Compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
ISL12020MIRZ
Manufacturer:
Intersil
Quantity:
454
Part Number:
ISL12020MIRZ
Manufacturer:
INTERSIL
Quantity:
20 000
Part Number:
ISL12020MIRZ-T
Manufacturer:
INTERSIL
Quantity:
20 000
BATTERY
3.0V
Low Power RTC with Battery Backed SRAM,
Integrated ±5ppm Temperature Compensation and
Auto Daylight Saving
ISL12020M
The ISL12020M device is a low power real time clock
(RTC) with an embedded temperature sensor and
crystal. Device functions include oscillator compensation,
clock/calendar, power fail and low battery monitors,
brownout indicator, one-time, periodic or polled alarms,
intelligent battery backup switching, Battery Reseal™
function and 128 bytes of battery-backed user SRAM.
The device is offered in a 20 Ld DFN module that
contains the RTC and an embedded 32.768kHz quartz
crystal. The calibrated oscillator provides less than
±5ppm drift over the full -40°C to +85°C temperature
range.
The RTC tracks time with separate registers for hours,
minutes, and seconds. The calendar registers track date,
month, year and day of the week and are accurate
through 2099, with automatic leap year correction.
Daylight Savings time adjustment is done automatically,
using parameters entered by the user. Power fail and
battery monitors offer user-selectable trip levels. The
time stamp function records the time and date of
switchover from V
to V
Typical Application Circuit
February 11, 2010
FN6667.4
DD
SCHOTTKY DIODE
BAT54
power.
0.1µF
C2
10
1
2
3
4
5
6
7
8
9
DD
X2
X2
X2
X2
X2
NC
V
GND
NC
NC
BAT
ISL12020M
to V
IRQ/F
SDA 11
V
OUT
SCL 12
BAT
X1 20
X1 19
X1 18
X1 17
X1 16
NC 15
DD
1
14
13
power, and also from V
0.1µF
C1
3.3V
R1
10k
IRQ/FOUT
1-888-INTERSIL or 1-888-468-3774
R2
10k
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
R3
10k
VDD
SCL
SDA
GND
INTERFACE
BAT
MCU
Features
• Embedded 32.768kHz Quartz Crystal in the Package
• 20 Ld DFN Package (for SOIC version, refer to the
• Calendar
• On-chip Oscillator Temperature Compensation
• 10-bit Digital Temperature Sensor Output
• 15 Selectable Frequency Outputs
• Interrupt for Alarm or 15 Selectable Frequency
• Automatic Backup to Battery or Supercapacitor
• VDD and Battery Status Monitors
• Battery Reseal™ Function to Extend Battery Shelf
• Power Status Brownout Monitor
• Time Stamp for Battery Switchover
• 128 Bytes Battery-Backed User SRAM
• I
• RoHS Compliant
Applications*
• Utility Meters
• POS Equipment
• Printers and Copiers
• Digital Cameras
Performance Curve
ISL12022M)
Outputs
Life
All other trademarks mentioned are the property of their respective owners.
2
C-Bus™
|
Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright Intersil Americas Inc. 2008, 2009, 2010. All Rights Reserved
-1
-2
-3
-4
-5
5
4
3
2
1
0
-40
I
2
C Bus™ is a trademark owned by NXP Semiconductors Netherlands, B.V.
OSCILLATOR ERROR vs TEMPERATURE
-20
V
BAT
0
= 5.5V
TEMPERATURE (°C)
(see page 31)
V
DD
20
= 3.3V
40
V
DD
60
= 2.7V
80

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ISL12020MIRZ Summary of contents

Page 1

... IRQ/FOUT -40 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. | 1-888-INTERSIL or 1-888-468-3774 Intersil (and design registered trademark of Intersil Americas Inc Bus™ trademark owned by NXP Semiconductors Netherlands, B.V. Copyright Intersil Americas Inc. 2008, 2009, 2010. All Rights Reserved All other trademarks mentioned are the property of their respective owners. ...

Page 2

... PART NUMBER (Note 3) MARKING ISL12020MIRZ (Note 2) ISL 12020MIRZ ISL12020MIRZ-T (Notes 1, 2) ISL 12020MIRZ 1. Please refer to TB347 for details on reel specifications. 2. These Intersil plastic packaged products employ special material sets, molding compounds and 100% matte tin plate plus anneal (e3) termination finish. These products do contain Pb but they are RoHS compliant by exemption 7 (lead in high melt temp solder for internal connections) and exemption 5 (lead in piezoelectric elements) ...

Page 3

Table of Contents Block Diagram .................................................. 2 Pin Descriptions ............................................... 4 Absolute Maximum Ratings .............................. 5 Electrical Specifications .....................................6 SDA vs SCL Timing............................................ 8 Symbol Table .................................................... 8 Typical Performance Curves ............................. 8 General Description ........................................ 10 Functional Description.................................... 10 ...

Page 4

Pin Configuration Pin Descriptions PIN NUMBER SYMBOL Crystal Connection. The X1 and X2 pins are the input and output, respectively inverting 16, 17, 18, X1 amplifier and are also connected to the ...

Page 5

... Thermal Resistance (Typical) 20 Lead DFN (Notes Storage Temperature . . . . . . . . . . . . . . . -40°C to +85°C + 0.3V Pb-Free Reflow Profile (Note .see link below DD http://www.intersil.com/pbfree/Pb-FreeReflow.asp Test Conditions +2.7 to +5.5V stated. Boldface limits apply over the operating temperature range, -40°C to +85°C. CONDITIONS (Note 10) ...

Page 6

DC Operating Characteristics - RTC SYMBOL PARAMETER IRQ/F (OPEN DRAIN OUTPUT) OUT V Output Low Voltage OL Power-Down Timing Test Conditions: V Boldface limits apply over the operating temperature range, -40°C to +85°C. SYMBOL PARAMETER V V Negative Slew rate ...

Page 7

I2C Interface Specifications SYMBOL PARAMETER t START Condition Hold Time HD:STA t Input Data Setup Time SU:DAT t Input Data Hold Time HD:DAT t STOP Condition Setup Time SU:STO t STOP Condition Hold Time HD:STO t Output Data Hold Time ...

Page 8

SDA vs SCL Timing t F SCL t SU:STA t HD:STA SDA (INPUT TIMING) SDA (OUTPUT TIMING) EQUIVALENT AC OUTPUT LOAD CIRCUIT FOR V 5.0V 1533Ω SDA AND IRQ/F OUT 100pF FIGURE 1. STANDARD OUTPUT LOAD FOR TESTING THE DEVICE ...

Page 9

Typical Performance Curves 5.5V BAT 3. -40 - TEMPERATURE (°C) FIGURE TEMPERATURE DD1 5. ...

Page 10

... Functional Description Power Control Operation The power control circuit accepts a V input. Many types of batteries can be used with Intersil RTC products. For example, 3.0V or 3.6V Lithium batteries are appropriate, and battery sizes are available that can power the ISL12020M for years. ...

Page 11

BATTERY-BACKUP MODE TRIP V BAT BAT BATHYS FIGURE 12. BATTERY SWITCHOVER WHEN V < V BAT TRIP BATTERY-BACKUP MODE BAT V TRIP V TRIP FIGURE 13. BATTERY SWITCHOVER WHEN V > ...

Page 12

The pulsed Interrupt mode allows for repetitive or recurring alarm functionality. Hence, once the alarm is set, the device will continue to alarm for each occurring match of the alarm and present time. Thus, it will alarm as often as ...

Page 13

TABLE 1. REGISTER MEMORY MAP (X INDICATES DEFAULT VARIES WITH EACH DEVICE. YELLOW SHADING INDICATES THOSE BITS SHOULD NOT BE CHANGED BY THE USER) REG ADDR. SECTION NAME 7 00h SC 0 01h MN 0 02h HR MIL RTC 03h ...

Page 14

TABLE 1. REGISTER MEMORY MAP (Continued)(X INDICATES DEFAULT VARIES WITH EACH DEVICE. YELLOW SHADING INDICATES THOSE BITS SHOULD NOT BE CHANGED BY THE USER) (Continued) REG ADDR. SECTION NAME 7 20h DstMoFd DSTE 21h DstDwFd D 22h DstDtFd D 23h ...

Page 15

OSCILLATOR FAIL BIT (OSCF) Oscillator Fail Bit indicates that the oscillator has stopped. DAYLIGHT SAVING TIME CHANGE BIT (DSTADJ) DSTADJ is the Daylight Saving Time Adjusted Bit. It indicates the daylight saving time forward adjustment has happened DST ...

Page 16

Interrupt Control Register (INT) TABLE 3. INTERRUPT CONTROL REGISTER (INT) ADDR 08h ARST WRTC IM FOBATB FO3 FO2 FO1 FO0 AUTOMATIC RESET BIT (ARST) This bit enables/disables the automatic reset of the ALM, LVDD, LBAT85, and ...

Page 17

Battery Voltage Trip Voltage Register (PWR_VBAT) This register controls the trip points for the two V alarms, with levels set to approximately 85% and 75% of the nominal battery level. TABLE 7. ADDR 0Ah D RESEALB ...

Page 18

AGING AND INITIAL ANALOG TRIMMING BITS (IATR0<5:0>) The Initial Analog Trimming Register allows +32ppm to -31ppm adjustment in 1ppm/bit increments. This enables fine frequency adjustment for trimming initial crystal accuracy error or to correct for aging drift. The ISL12020M has ...

Page 19

TABLE 12. IATRO TRIMMING RANGE (Continued) IATR05 IATR04 ...

Page 20

FREQUENCY OF TEMPERATURE SENSING AND CORRECTION BIT (BTSR) This bit controls the frequency of Temp Sensing and Correction. BTSR = 0 default mode is every 10 minutes, BTSR = 1 is every 1.0 minute. Note that BTSE has to be ...

Page 21

TABLE 17. FINAL ANALOG TRIMMING REGISTER ADDR 0Eh 0 0 FATR5 FATR4 FATR3 FATR2 FATR1 FATR0 Final Digital Trimming Register (FDTR) This register shows the final setting of DT after temperature correction read-only; ...

Page 22

After these registers are set, an alarm will be generated when the RTC advances to exactly 11:30 a.m. on January 1 (after seconds changes from 59 to 00) by setting the ALM bit in the status register to “1” and ...

Page 23

Bits contain the Week of the Month information that sets the week that DST starts. The range is from and Week 7 is used to indicate the last week of the month. The ...

Page 24

DST Day/Week Reverse DstDwRv contains both the Day of the Week and the Week of the Month data for DST Reverse control. DST can be controlled either by actual date or by setting both the Week of the month and ...

Page 25

TABLE 24. XT0 VALUES XT<4:0> 01111 01110 01101 01100 01011 01010 01001 01000 00111 00110 00101 00100 00011 00010 00001 00000 10000 10001 10010 10011 10100 10101 10110 10111 11000 11001 11010 11011 11100 11101 11110 11111 ALPHA Hot Register ...

Page 26

SCL SDA START FIGURE 15. VALID DATA CHANGES, START AND STOP CONDITIONS SCL FROM MASTER SDA OUTPUT FROM TRANSMITTER SDA OUTPUT FROM RECEIVER START FIGURE 16. ACKNOWLEDGE RESPONSE FROM RECEIVER SIGNALS FROM THE MASTER SIGNAL AT SDA SIGNALS FROM ...

Page 27

Upon a correct compare, the device outputs an acknowledge on the SDA line. Following the Slave Byte is a one byte word address. The word address is either supplied by the master device ...

Page 28

V = 2.7V ISL12020M J DD BAT TO 5.5V VDD VBAT C IN 0.1µF GND FIGURE 20. SUGGESTED BATTERY-BACKUP CIRCUIT The diode, D will add a small drop to the battery BAT voltage but will protect the circuit should ...

Page 29

Temperature Compensation Operation The ISL12020M temperature compensation feature needs to be enabled by the user. This must be done in a specific order as follows. 1. Read register 0Dh, the BETA register. This register contains the 5-bit BETA trimmed value, ...

Page 30

... Changed "Pb-Free" on page 1 and page 3 under package to: "RoHS Compliant" 10/22/09 FN6667.4 Converted to New Intersil Template - Matched front page to match ISL12022M with the exception of pinout change from SOIC to DFN. Updated ordering information by numbering all notes, setting up links, added MSL (Moisture Sensitivity Level) note. Updated word "Pinout" to " ...

Page 31

... Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries ...

Page 32

Package Outline Drawing L20.5.5x4.0 20 LEAD DUAL FLAT NO-LEAD PLASTIC PACKAGE Rev 1, 07/09 5.5 PIN 1 TOP VIEW INDEX AREA (4.95) (2X 0.20) (4.50 ) 10X 0.50 10X 0.50 10X 0. 0.25 PACKAGE BOUNDARY 2X 1.50 0.68 ...

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