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X1205S8

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P22
1
®
FN8097.3
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.
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
2-Wire™ RTC Real Time Clock/Calendar
FEATURES
• Real Time Clock/Calendar
—Tracks time in Hours, Minutes, and Seconds
—Day of the Week, Day, Month, and Year
• 2 Polled Alarms (Non-volatile)
—Settable on the Second, Minute, Hour, Day of
the Week, Day, or Month
—Repeat Mode (periodic interrupts)
• Oscillator Compensation on Chip
—Internal Feedback Resistor and Compensation
Capacitors
—64 Position Digitally Controlled Trim Capacitor
—6 Digital Frequency Adjustment Settings to
±30ppm
• Battery Switch or Super Cap Input
• 2-Wire™ Interface Interoperable with I
2
C*
—400kHz Data Transfer Rate
• Low Power CMOS
—1.25µA Operating Current (Typical)
• Small Package Options
—8 Ld SOIC and 8 Ld TSSOP
• Repetitive Alarms
• Temperature Compensation
• 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
DESCRIPTION
The X1205 device is a Real Time Clock with
clock/calendar, two polled alarms, oscillator
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. The calendar is correct
through 2099, with automatic leap year correction.
BLOCK DIAGRAM
X1
X2
Oscillator
Frequency
Timer
Logic
Divider
Calendar
8
32.768kHz
Control
Registers
1Hz
Time
Keeping
Registers
Alarm Regs
Compare
Mask
IRQ
Control
Decode
Logic
Alarm
(EEPROM)
(EEPROM)
SCL
SDA
Serial
Interface
Decoder
Interrupt Enable
Registers
Status
(SRAM)
Alarm
Alarm
(SRAM)
OSC
Compensation
Data Sheet May 2, 2006
2
FN8097.3
May 2, 2006
PIN DESCRIPTIONS
PIN ASSIGNMENTS
NC = No internal connection
X1
X2
V
BACK
V
CC
IRQ
SCL
SDA
V
SS
1
2
3
4
7
8
6
5
8 Ld TSSOP
X1205
X1
X2
V
BACK
V
CC
IRQ
SCL
SDA
V
SS
1
2
3
4
7
8
6
5
8 Ld SOIC
Ordering Information
PART NUMBER PART MARKING V
CC
RANGE (V) TEMP RANGE (°C) PACKAGE PKG. DWG. #
X1205S8* X1205 2.7 to 5.5 0 to 70 8 Ld SOIC (150 mil) MDP0027
X1205S8Z* (Note) X1205 Z 0 to 70 8 Ld SOIC (150 mil) (Pb Free) MDP0027
X1205S8I* X1205 I -40 to 85 8 Ld SOIC (150 mil) MDP0027
X1205S8IZ* (Note) X1205 Z I -40 to 85 8 Ld SOIC (150 mil) (Pb Free) MDP0027
X1205V8* 1205 0 to 70 8 Ld TSSOP (4.4mm) M8.173
X1205V8Z* (Note) 1205 Z 0 to 70 8 Ld TSSOP (4.4mm) (Pb-free) M8.173
X1205V8I* 1205I -40 to 85 8 Ld TSSOP (4.4mm) M8.173
X1205V8IZ* (Note) 1205I Z -40 to 85 8 Ld TSSOP (4.4mm) (Pb-free) M8.173
*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.
Pin Number
Symbol Brief DescriptionSOIC TSSOP
13X1X1. The X1 pin is the input of an inverting amplifier and should be connected to one pin
of a 32.768kHz quartz crystal.
24X2X2. The X2 pin is the output of an inverting amplifier and should be connected to one pin
of a 32.768kHz quartz crystal.
35IRQ
Interrupt Output – IRQ. This is an interrupt signal output. This signal notifies a host proces-
sor that an alarm has occurred and requests action. It is an open drain active low output.
46V
SS
V
SS
.
57SDASerial Data (SDA). SDA is a bidirectional pin used to transfer data into and out of the
device. It has an open drain output and may be wire ORed with other open drain or open
collector outputs.
68SCLSerial Clock (SCL). The SCL input is used to clock all data into and out of the device.
71V
BACK
V
BACK
. This input provides a backup supply voltage to the device. V
BACK
supplies power
to the device in the event the V
CC
supply fails. This pin can be connected to a battery, a
Supercap or tied to ground if not used.
82V
CC
V
CC
.
X1205
3
FN8097.3
May 2, 2006
ABSOLUTE MAXIMUM RATINGS
Temperature Under Bias ................... -65°C to +135°C
Storage Temperature ........................ -65°C to +150°C
Voltage on V
CC
, V
BACK
and IRQ
pin (respect to ground) ............................-0.5V to 7.0V
Voltage on SCL, SDA, X1 and X2
pin (respect to ground) ............... -0.5V to 7.0V or 0.5V
above V
CC
or V
BACK
(whichever is higher)
DC Output Current .............................................. 5 mA
Lead Temperature (Soldering, 10 sec).............. 300°C
Stresses above those listed under “Absolute Maximum
Ratings” may cause permanent damage to the device.
This is a stress rating only and the functional operation
of the device at these or any other conditions above
those indicated in the operational sections of this
specification is not implied. Exposure to absolute max-
imum rating conditions for extended periods may
affect device reliability.
DC OPERATING CHARACTERISTICS (Temperature = -40°C to +85°C, unless otherwise stated.)
OPERATING CHARACTERISTICS
Symbol Parameter Conditions Min Typ Max Unit Notes
V
CC
Main Power Supply 2.7 5.5 V
V
BACK
Backup Power Supply 1.8 5.5 V
V
CB
Switch to Backup Supply V
BACK
-0.2 V
BACK
-0.1 V
V
BC
Switch to Main Supply V
BACK
V
BACK
+0.2 V
Symbol Parameter Conditions Min Typ Max Unit Notes
I
CC1
Read Active Supply
Current
V
CC
= 2.7V 400 µA 1, 5, 7, 14
V
CC
= 5.0V 800 µA
I
CC2
Program Supply Current
(nonvolatile)
V
CC
= 2.7V 2.5 mA 2, 5, 7, 14
V
CC
= 5.0V 3.0 mA
I
CC3
Main Timekeeping
Current
V
CC
= 2.7V 10 µA 3, 7, 8, 14, 15
V
CC
= 5.0V 20 µA
I
BACK
Timekeeping Current V
BACK
= 1.8V 1.25 µA 3, 6, 9, 14, 15
“See Perfor-
mance Data”
V
BACK
= 3.3V 1.5 µA
I
LI
Input Leakage Current 10 µA 10
I
LO
Output Leakage Current 10 µA 10
V
IL
Input LOW Voltage -0.5 V
CC
x 0.2 or
V
BACK
x 0.2
V13
V
IH
Input HIGH Voltage V
CC
x 0.7 or
V
BACK
x 0.7
V
CC
+ 0.5 or
V
BACK
+ 0.5
V13
V
HYS
Schmitt Trigger Input
Hysteresis
V
CC
related level .05 x V
CC
or
.05 x V
BACK
V13
V
OL
Output LOW Voltage for
SDA/IRQ
V
CC
= 2.7V 0.4 V 11
V
CC
= 5.5V 0.4
X1205
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P22

X1205S8

Mfr. #:
Buy X1205S8
Manufacturer:
Renesas / Intersil
Description:
IC RTC CLK/CALENDAR I2C 8-SOIC
Lifecycle:
New from this manufacturer.
Delivery:
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