ISL1220IUZ-T Intersil, ISL1220IUZ-T Datasheet

IC RTC LP BATT BACK SRAM 10MSOP

ISL1220IUZ-T

Manufacturer Part Number
ISL1220IUZ-T
Description
IC RTC LP BATT BACK SRAM 10MSOP
Manufacturer
Intersil
Type
Clock/Calendar/Alarmr
Datasheet

Specifications of ISL1220IUZ-T

Memory Size
8B
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
10-MSOP, Micro10™, 10-uMAX, 10-uSOP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
ISL1220IUZ-TTR

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
ISL1220IUZ-T
Manufacturer:
Vishay
Quantity:
1 600
Low Power RTC with 8 Bytes of Battery
Backed SRAM and Separate F
The ISL1220 device is a low power real time clock with
timing and crystal compensation, clock/calendar, power fail
indicator, periodic or polled alarm, intelligent battery backup
switching, battery-backed user SRAM and separate F
and IRQ outputs.
The oscillator uses an external, low-cost 32.768kHz crystal.
The real time clock tracks time with separate registers for
hours, minutes, and seconds. The device has calendar
registers for date, month, year and day of the week. The
calendar is accurate through 2099, with automatic leap year
correction.
Ordering Information
NOTE: Intersil Pb-free products employ special Pb-free material sets;
molding compounds/die attach materials and 100% matte tin plate
termination finish, which are RoHS compliant and compatible with both
SnPb and Pb-free soldering operations. Intersil Pb-free products are
MSL classified at Pb-free peak reflow temperatures that meet or
exceed the Pb-free requirements of IPC/JEDEC J STD-020.
Pinout
ISL1220IUZ
ISL1220IUZ-T 1220Z
NUMBER
(Note)
PART
V
GND
BAT
MARKING
1220Z
X1
NC
X2
PART
3
1
2
4
5
(10 LD MSOP)
TOP VIEW
2.7V to 5.5V -40 to +85 10 Ld MSOP
2.7V to 5.5V -40 to +85 10 Ld MSOP
ISL1220
®
RANGE
V
1
DD
Data Sheet
RANGE
10
TEMP.
9
8
7
6
(°C)
V
IRQ
SCL
SDA
F
OUT
OUT
DD
Tape and Reel
PACKAGE
(Pb-Free)
I
2
C
OUT
1-888-INTERSIL or 1-888-468-3774
®
Real Time Clock/Calendar with Frequency Output
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
Features
• Real Time Clock/Calendar
• Frequency Output pin
• Single Alarm with Separate Interrupt pin
• Automatic Backup to Battery or Super Cap
• Power Failure Detection
• On-Chip Oscillator Compensation
• 8 Bytes Battery-Backed User SRAM
• I
• 400nA Battery Supply Current
• Small Package Option
• Pb-Free Plus Anneal Available (RoHS Compliant)
Applications
• Utility Meters
• HVAC Equipment
• Audio/Video Components
• Set Top Box/Television
• Modems
• Network Routers, Hubs, Switches, Bridges
• Cellular Infrastructure Equipment
• Fixed Broadband Wireless Equipment
• Pagers/PDA
• POS Equipment
• Test Meters/Fixtures
• Office Automation (Copiers, Fax)
• Home Appliances
• Computer Products
• Other Industrial/Medical/Automotive
- Tracks Time in Hours, Minutes, and Seconds
- Day of the Week, Day, Month, and Year
- 15 Selectable Output Frequencies
- Settable to the Second, Minute, Hour, Day of the Week,
- Single Event or Pulse Interrupt Mode
- 400kHz Data Transfer Rate
- 10 Ld MSOP Package
2
C Interface
Day, or Month
All other trademarks mentioned are the property of their respective owners.
June 22, 2006
|
Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright Intersil Americas Inc. 2006. All Rights Reserved
ISL1220
FN6315.0

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ISL1220IUZ-T Summary of contents

Page 1

... RANGE ISL1220IUZ 1220Z 2.7V to 5.5V - MSOP ISL1220IUZ-T 1220Z 2.7V to 5.5V - MSOP NOTE: Intersil Pb-free products employ special Pb-free material sets; molding compounds/die attach materials and 100% matte tin plate termination finish, which are RoHS compliant and compatible with both SnPb and Pb-free soldering operations ...

Page 2

Block Diagram SDA SDA BUFFER SCL SCL BUFFER X1 CRYSTAL OSCILLATOR TRIP V BAT GND Pin Descriptions PIN NUMBER SYMBOL 1 X1 The X1 pin is the input of an inverting amplifier and is intended to ...

Page 3

Absolute Maximum Ratings Voltage SCL, SDA, and IRQ BAT (respect to ground ...

Page 4

Serial Interface Specifications SYMBOL PARAMETER V SDA and SCL Input Buffer HIGH IH Voltage Hysteresis SDA and SCL Input Buffer Hysteresis V SDA Output Buffer LOW Voltage, OL Sinking 3mA Cpin SDA and SCL Pin Capacitance f SCL Frequency SCL ...

Page 5

SDA vs SCL Timing SCL t SU:STA t HD:STA SDA (INPUT TIMING) SDA (OUTPUT TIMING) Symbol Table WAVEFORM INPUTS Must be steady May change from LOW to HIGH May change from HIGH to LOW Don’t Care: Changes Allowed N/A 5 ...

Page 6

Typical Performance Curves 1E-6 900E-9 800E-9 700E-9 600E-9 500E-9 400E-9 300E-9 200E-9 100E-9 000E+0 1.5 2.0 2.5 3.0 3.5 4.0 V (V) BAT FIGURE BAT 2.4E-06 2.2E- 2.0E-06 1.8E-06 1.6E- ...

Page 7

... Functional Description Power Control Operation The power control circuit accepts a V 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 ISL1220 for years. Another option is to use a ...

Page 8

Super Cap for applications where month. See the Applications Section for more information. Normal Mode ( Battery Backup Mode BAT To transition from the mode, both of the ...

Page 9

Accuracy of the Real Time Clock The accuracy of the Real Time Clock depends on the frequency of the quartz crystal that is used as the ...

Page 10

Write capability is allowable into the RTC registers (00h to 06h) only when the WRTC bit (bit 4 of address 07h) is set to “1”. A multi-byte read or write operation is limited to one section per operation. Access to ...

Page 11

Real Time Clock Registers Addresses [00h to 06h] RTC REGISTERS (SC, MN, HR, DT, MO, YR, DW) These registers depict BCD representations of the time. As such, SC (Seconds) and MN (Minutes) range from 0 to 59, HR (Hour) can ...

Page 12

NOTE: Writing to register 08h has restrictions byte writes to register 08h are allowed, only page writes beginning with register 07h >V , then a byte write to register 08h IS DD BAT allowed, as well ...

Page 13

C is changed via two digitally LOAD controlled capacitors, C and C , connected from the and X2 pins to ground (see Figure 11). The value given by the following formula: ...

Page 14

Below are examples of both Single Event and periodic Interrupt Mode alarms. Example 1 – Alarm set with single interrupt (IM = ”0”) A single alarm will occur on January 1 at 11:30am. A. Set Alarm registers as follows: BIT ...

Page 15

SDA line LOW to acknowledge the reception of the eight bits of data (See Figure 13). The ISL1220 responds with an ACK after recognition of a START condition followed by a valid Identification Byte, and SCL SDA ...

Page 16

Device Addressing Following a start condition, the master must output a Slave Address Byte. The 7 MSBs are the device identifier. These bits are “1101111”. Slave bits “1101” access the register. Slave bits “111” specify the device select bits. The ...

Page 17

Application Section Oscillator Crystal Requirements The ISL1220 uses a standard 32.768kHz crystal. Either through hole or surface mount crystals can be used. Table 7 lists some recommended surface mount crystals and the parameters of each. This list is not exhaustive ...

Page 18

Fairly accurate temperature compensation can be implemented just by using the crystal manufacturer’s specifications for the turnover temperature T and the drift coefficient (β). The ...

Page 19

For a robust design, a margin of 30% should be included to cover supply current and capacitance tolerances over the results of the calculations. Even more margin ...

Page 20

... 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 ...

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