X1205V8 Intersil, X1205V8 Datasheet

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X1205V8

Manufacturer Part Number
X1205V8
Description
IC RTC/CALENDAR 2-WIRE 8-TSSOP
Manufacturer
Intersil
Type
Clock/Calendarr
Datasheet

Specifications of X1205V8

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
0°C ~ 70°C
Mounting Type
Surface Mount
Package / Case
8-TSSOP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Memory Size
-
2-Wire™ RTC Real Time Clock/Calendar
FEATURES
• Real Time Clock/Calendar
• 2 Polled Alarms (Non-volatile)
• Oscillator Compensation on Chip
• Battery Switch or Super Cap Input
• 2-Wire™ Interface Interoperable with I
• Low Power CMOS
• Small Package Options
• Repetitive Alarms
• Temperature Compensation
• Pb-Free Plus Anneal Available (RoHS Compliant)
APPLICATIONS
• Utility Meters
• HVAC Equipment
BLOCK DIAGRAM
—Tracks time in Hours, Minutes, and Seconds
—Day of the Week, Day, Month, and Year
—Settable on the Second, Minute, Hour, Day of
—Repeat Mode (periodic interrupts)
—Internal Feedback Resistor and Compensation
—64 Position Digitally Controlled Trim Capacitor
—6 Digital Frequency Adjustment Settings to
—400kHz Data Transfer Rate
—1.25µA Operating Current (Typical)
—8 Ld SOIC and 8 Ld TSSOP
the Week, Day, or Month
Capacitors
±30ppm
SCL
SDA
32.768kHz
Interface
Decoder
Serial
IRQ
X1
X2
®
1
8
Decode
Control
Logic
Data Sheet
(EEPROM)
Registers
2
Control
C*
Interrupt Enable
Oscillator
Compensation
1-888-INTERSIL or 1-888-468-3774
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
OSC
Alarm
Copyright Intersil Americas Inc. 2005-2006. All Rights Reserved. *I2C is a Trademark of Philips.
Registers
Frequency
(SRAM)
Status
• 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
DESCRIPTION
The X1205 device is a Real Time Clock with
clock/calendar,
compensation, and battery backup switch.
The oscillator uses an external, low-cost 32.768kHz
crystal. All compensation and trim components are
integrated on the chip. This eliminates several external
discrete components and a trim capacitor, saving
board area and component cost.
The Real-Time Clock keeps track of time with
separate registers for Hours, Minutes, and Seconds.
The Calendar has separate registers for Date, Month,
Year and Day-of-week.
through 2099, with automatic leap year correction.
Divider
All other trademarks mentioned are the property of their respective owners.
|
May 2, 2006
1Hz
Intersil (and design) is a registered trademark of Intersil Americas Inc.
Alarm
Alarm
two
Calendar
Timer
Logic
polled
The calendar is correct
Compare
Alarm Regs
(EEPROM)
Registers
(SRAM)
Keeping
alarms,
Time
X1205
FN8097.3
oscillator

Related parts for X1205V8

X1205V8 Summary of contents

Page 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 registered trademark of Intersil Americas Inc. Copyright Intersil Americas Inc. 2005-2006. All Rights Reserved. *I2C is a Trademark of Philips. All other trademarks mentioned are the property of their respective owners. X1205 FN8097.3 ...

Page 2

... X1205V8Z* (Note) 1205 Z X1205V8I* 1205I X1205V8IZ* (Note) 1205I Z *Add “T1” suffix for tape and reel. NOTE: Intersil Pb-free plus anneal 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 ...

Page 3

ABSOLUTE MAXIMUM RATINGS Temperature Under Bias ................... -65°C to +135°C Storage Temperature ........................ -65°C to +150°C Voltage and IRQ CC BACK pin (respect to ground) ............................-0.5V to 7.0V Voltage on SCL, SDA, X1 and X2 pin ...

Page 4

Notes: (1) The device enters the Active state after any start, and remains active: for 9 clock cycles if the Device Select Bits in the Slave Address Byte are incorrect or until 200nS after a stop ending a read or ...

Page 5

AC Specifications (T = -40°C to +85°C, VCC = +2.7V to +5.5V, unless otherwise specified.) A Symbol f SCL Clock Frequency SCL t Pulse width Suppression Time at inputs IN t SCL LOW to SDA Data Out Valid AA t ...

Page 6

Write Cycle Timing SCL SDA 8th Bit of Last Byte Power-up Timing Symbol (1) t Time from Power-up to Read PUR (1) t Time from Power-up to Write PUW Notes: (1) Delays are measured from the time V V slew ...

Page 7

DESCRIPTION (continued) The powerful Dual Alarms can be set to any Clock/Calendar value for a match. For instance, every minute, every Tuesday March 21. The alarms can be polled in the Status Register or provide a ...

Page 8

... For example, a >20ppm frequency deviation translates into an accuracy of >1 minute per month. These parameters are available from the crystal manufacturer. Intersil’s RTC family provides on-chip crystal compensation networks to adjust load- capacitance to tune oscillator frequency from +116 ppm to -37 ppm when using a 12.5 pF load crystal. For more detail information see the Application section ...

Page 9

When there is a match, an alarm flag is set. The occur- rence of an alarm can be determined by polling the AL0 and AL1 bits or by enabling the IRQ output, using it as hardware flag. The alarm enable ...

Page 10

RTCF: Real Time Clock Fail Bit-Volatile This bit is set to a “1” after a total power failure. This is a read only bit that is set by hardware (X1205 inter- nally) when the device powers up after having lost ...

Page 11

... ATR value. See Application section and Intersil’s Application Note AN154 for more information. WRITING TO THE CLOCK/CONTROL REGISTERS Changing any of the nonvolatile bits of the clock/con- trol register requires the following steps: – ...

Page 12

Write one to 8 bytes to the Clock/Control Registers with the desired clock, alarm, or control data. This sequence starts with a start bit, requires a ...

Page 13

Figure 4. Valid Data Changes on the SDA Bus SCL SDA Figure 5. Valid Start and Stop Conditions SCL SDA Figure 6. Acknowledge Response From Receiver SCL from Master Data Output from Transmitter Data Output from Receiver DEVICE ADDRESSING Following ...

Page 14

Figure 7. Slave Address, Word Address, and Data Bytes Write Operations Byte Write For a write operation, the device requires the Slave Address Byte and the Word Address ...

Page 15

Stop and Write Modes Stop conditions that terminate write operations must be sent by the master after sending at least 1 full data byte and it’s associated ACK signal stop is issued in the middle of a data ...

Page 16

Figure 10. Random Address Read Sequence S t Signals from a the Master Address r t SDA Bus Signals from the Slave Figure 11. Sequential Read Sequence Slave Signals from Address the Master SDA Bus Signals from ...

Page 17

... In addition to the analog compensation afforded by the adjustable load capacitance, a digital compensation feature is available for the Intersil RTC family. There are three bits known as the Digital Trimming Register or DTR, and they operate by adding or skipping pulses in the clock signal. The range provided is ±30ppm in increments of 10ppm ...

Page 18

... Backup Battery Operation Many types of batteries can be used with the Intersil RTC products. 3.0V or 3.6V Lithium batteries are appropriate, and sizes are available that can power a Intersil RTC device for years. Another option is to use a supercapacitor for applications where Vcc may disappear intermittently for short periods of time ...

Page 19

Depending on the value of supercapacitor used, backup time can last from a few days to two weeks (with >1F). A simple silicon or Schottky barrier diode can be used in series with Vcc to charge the supercapacitor, which is ...

Page 20

Referring to Figure 13, Vtrip applies to the “Internal Vcc” node which powers the entire device. This means that if Vcc is powered down and the battery voltage at Vback is higher than the Vtrip voltage, then the entire chip ...

Page 21

Small Outline Package Family (SO PIN #1 I.D. MARK 0.010 SEATING PLANE 0.004 C 0.010 MDP0027 SMALL OUTLINE PACKAGE FAMILY (SO) SYMBOL SO-8 SO-14 ...

Page 22

... 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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