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ISL12022MAのメーカーはIntersil Corporationです、この部品の機能は「Low Power RTC」です。 |
部品番号 | ISL12022MA |
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部品説明 | Low Power RTC | ||
メーカ | Intersil Corporation | ||
ロゴ | |||
このページの下部にプレビューとISL12022MAダウンロード(pdfファイル)リンクがあります。 Total 29 pages
Low Power RTC with Battery Backed SRAM,
Integrated ±5ppm Temperature Compensation and
Auto Daylight Saving
ISL12022MA
The ISL12022MA 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 SOIC 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 VDD to VBAT power, and also from VBAT
to VDD power.
The ISL12022MA features enhanced immunity to ESD
per the IEC61000-4-2 standard, and also provides
improved resistance to system leakage related to
environmental moisture.
Related Literature
• See TB484 “ISL12022MA Enhanced RTC Module”
• See AN1549 “Addressing Power Issues in Real Time
Clock Applications”
Features
• Embedded 32.768kHz Quartz Crystal in the Package
• 20 Ld SOIC Package (for DFN version, refer to the
ISL12020M)
• Calendar
• On-chip Oscillator Temperature Compensation
• 10-bit Digital Temperature Sensor Output
• 15 Selectable Frequency Outputs
• Interrupt for Alarm or 15 Selectable Frequency
Outputs
• Automatic Backup to Battery or Supercapacitor
• VDD and Battery Status Monitors
• Battery Reseal™ Function to Extend Battery Shelf Life
• Power Status Brownout Monitor
• Time Stamp for Battery Switchover
• 128 Bytes Battery-Backed User SRAM
• I2C-Bus™
• RoHS Compliant
Applications
• Utility Meters
• POS Equipment
• Printers and Copiers
• Digital Cameras
Typical Application Circuit
1 GND
GND 20
2 GND
GND 19
3 GND
4 GND
GND 18
NC 17
3.3V
SCHOTTKY DIODE
BAT54
BATTERY
3.0V
C2
0.1µF
5 NC
6 NC
7 VBAT
8 GND
9 NC
NC 16
NC 15
VDD 14
IRQ/FOUT 13
SCL 12
C1
0.1µF
R1 R2 R3
10k 10k 10k
10 NC
SDA 11
ISL12022MA
VDO
SCL MCU
SDA INTERFACE
GND
IRQ/FOUT
Performance Curve
5 OSCILLATOR ERROR vs TEMPERATURE
4
3
2
1
0 VBAT = 5.5V
-1 VDD = 2.7V
-2
-3 VDD = 3.3V
-4
-5
-40
-20
0 20 40
TEMPERATURE (°C)
60
80
July 9, 2010
FN7575.1
www.DataSheet.in
1 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc.
I2C Bus is a registered trademark owned by NXP Semiconductors Netherlands, B.V.
Copyright Intersil Americas Inc. 2010. All Rights Reserved.
All other trademarks mentioned are the property of their respective owners.
1 Page ISL12022MA
Pin Descriptions (Continued)
PIN
NUMBER
12
13
14
1, 2, 3, 8,
18, 19, 20
SYMBOL
SCL
IRQ/FOUT
VDD
GND
DESCRIPTION
Serial Clock. The SCL input is used to clock all serial data into and out of the device. The input buffer
on this pin is always active (not gated). It is disabled when the backup power supply on the VBAT pin
is activated to minimize power consumption.
Interrupt Output/Frequency Output (Default 32.768kHz frequency output). This dual function pin
can be used as an interrupt or frequency output pin. The IRQ/FOUT mode is selected via the frequency
out control bits of the control/status register. Interrupt Mode. The pin provides an interrupt signal
output. This signal notifies a host processor that an alarm has occurred and requests action. It is an
open drain active low output. Frequency Output Mode. The pin outputs a clock signal, which is
related to the crystal frequency. The frequency output is user selectable and enabled via the I2C bus.
It is an open drain output. The output is open drain and requires a pull-up resistor.
Power Supply. Chip power supply and ground pins. The device will operate with a power supply from
VDD = 2.7V to 5.5VDC. A 0.1µF capacitor is recommended on the VDD pin to ground.
Ground Pin.
Ordering Information
PART NUMBER
(Notes 2, 3)
PART
MARKING
VDD RANGE TEMP RANGE
(V) (°C)
PACKAGE
(RoHS Compliant)
PKG.
DWG. #
ISL12022MAIBZ
ISL12022MAIBZ
2.7 to 5.5
-40 to +85 20 Ld SOIC
M20.3
ISL12022MAIBZ-T (Note 1)
ISL12022MAIBZ
2.7 to 5.5
-40 to +85 20 Ld SOIC (Tape and Reel) M20.3
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 (Pb in high melting
temperature type solders, electronic ceramic parts (e.g. piezoelectronic devices)) and exemption 5 (Pb in glass of electronic
components). These Intersil RoHS compliant products are compatible with both SnPb and Pb free soldering operations. These
Intersil RoHS compliant products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free
requirements of IPC/JEDEC J STD-020.
3. For Moisture Sensitivity Level (MSL), please see device information page for ISL12022MA. For more information on MSL
please see techbrief TB363.
www.DataSheet.in
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3Pages ISL12022MA
DC Operating Characteristics RTC Test Conditions: VDD = +2.7 to +5.5V, TA = -40°C to +85°C, unless otherwise
stated. Boldface limits apply over the operating temperature range, -40°C to +85°C. (Continued)
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
(Note 7) (Note 8) (Note 7) UNITS NOTES
Temp Temperature Sensor Accuracy
IRQ/FOUT (OPEN DRAIN OUTPUT)
VOL Output Low Voltage
VDD = VBAT = 3.3V
VDD = 5V, IOL = 3mA
VDD = 2.7V, IOL = 1mA
±2 °C 13
0.4 V
0.4 V
Power-Down Timing Test Conditions: VDD = +2.7 to +5.5V, Temperature = -40°C to +85°C, unless otherwise stated.
Boldface limits apply over the operating temperature range, -40°C to +85°C.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
(Note 7) (Note 8) (Note 7) UNITS NOTES
VDDSR-
VDD Negative Slew Rate
10 V/ms 12
I2C Interface Specifications Test Conditions: VDD = +2.7 to +5.5V, Temperature = -40°C to +85°C, unless otherwise
specified. Boldface limits apply over the operating temperature range, -40°C to +85°C.
SYMBOL
PARAMETER
TEST CONDITIONS
MIN
(Note 7)
TYP
MAX
(Note 8) (Note 7) UNITS NOTES
VIL SDA and SCL Input
Buffer LOW Voltage
-0.3
0.3 x VDD V
VIH SDA and SCL Input
Buffer HIGH Voltage
0.7 x VDD
VDD + 0.3 V
Hysteresis SDA and SCL Input
Buffer Hysteresis
0.05 x VDD
V 13, 14
VOL SDA Output Buffer
VDD = 5V, IOL = 3mA
LOW Voltage, Sinking
3mA
0
0.02
0.4 V
CPIN
fSCL
tIN
SDA and SCL Pin
Capacitance
SCL Frequency
Pulse Width
Suppression Time at
SDA and SCL Inputs
TA = +25°C, f = 1MHz,
VDD = 5V, VIN = 0V,
VOUT = 0V
Any pulse narrower than the max
spec is suppressed.
10 pF 13, 14
400
50
kHz
ns
tAA
tBUF
SCL Falling Edge to SCL falling edge crossing 30% of
SDA Output Data Valid VDD, until SDA exits the 30% to
70% of VDD window.
Time the Bus Must be SDA crossing 70% of VDD during a
Free Before the Start of STOP condition, to SDA crossing
a New Transmission
70% of VDD during the following
START condition.
1300
900
ns
ns
tLOW Clock LOW Time
Measured at the 30% of VDD
crossing.
1300
ns
tHIGH Clock HIGH Time
Measured at the 70% of VDD
crossing.
600
ns
tSU:STA START Condition Setup SCL rising edge to SDA falling edge.
Time
Both crossing 70% of VDD.
tHD:STA
START Condition Hold
Time
From SDA falling edge crossing
30% of VDD to SCL falling edge
crossing 70% of VDD.
600
600
ns
ns
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ページ | 合計 : 29 ページ | ||
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部品番号 | 部品説明 | メーカ |
ISL12022M | Real Time Clock | Intersil Corporation |
ISL12022MA | Low Power RTC | Intersil Corporation |
ISL12022MR5421 | Low Power RTC | Intersil |