1338C-31SRI8

1338C-31SRI8 Datasheet

REAL-TIME CLOCK WITH BATTERY BACKED NON-VOLATILE RAM IDT1338

Part	Datasheet
1338C-31SRI8	1338C-31SRI8 (pdf)

Related Parts	Information
1338C-31SRI	1338C-31SRI
1338C-18SRI8	1338C-18SRI8
1338C-18SRI	1338C-18SRI

PDF Datasheet Preview
DATASHEET REAL-TIME CLOCK WITH BATTERY BACKED NON-VOLATILE RAM IDT1338 The IDT1338 is a serial real-time clock RTC device that consumes ultra-low power and provides a full binary-coded decimal BCD clock/calendar with 56 bytes of battery backed Non-Volatile Static RAM. The clock/calendar provides seconds, minutes, hours, day, date, month, and year information. The clock operates in either the 24-hour or 12-hour format with AM/PM indicator. The end of the month date is automatically adjusted for months with fewer than 31 days, including corrections for leap year. Access to the clock/calendar registers is provided by an I2C interface capable of operating in fast I2C mode. Built-in Power-sense circuitry detects power failures and automatically switches to the backup supply, maintaining time and date operation. • Telecom Routers, Switches, Servers • Handheld GPS, Point of Sale POS terminals • Consumer Electronics Set-Top Box, Digital Recording, Network Applications, Digital photo frames • Office Fax/Printers, Copiers • Medical Glucometer, Medicine Dispensers • Others Thermostats, Vending Machines, Modems, Utility Meters Block Diagram • Real-Time Clock RTC counts seconds, minutes, hours, day, date, month, and year with leap-year compensation valid up to 2100 • 56-Byte battery-backed Non Volatile RAM for data storage • Fast mode I2C Serial interface • Automatic power-fail detect and switch circuitry • Programmable square-wave output • Packaged in 8-pin MSOP, 8-pin SOIC, or 16-pin SOIC surface-mount package with an integrated crystal • Industrial temperature range -40°C to +85°C Crystal inside package for 16-pin SOIC ONLY kHz Oscillator and Divider 1 Hz/4.096 kHz/ kHz/32.768 kHz MUX/ Buffer SQW/OUT VCC GND VBAT Power Control Control Logic Clock, Calendar Counter SCL SDA I2C Interface 56 Byte 1 Byte 7 Bytes RAM Control Buffer REAL-TIME CLOCK WITH BATTERY BACKED NON-VOLATILE RAM 1 IDT1338 IDT1338 REAL-TIME CLOCK WITH BATTERY BACKED NON-VOLATILE RAM Pin Assignment 8-pin MSOP/8-pin SOIC Pin Assignment 16-pin SOIC 8 VCC X2 2 IDT SQW/OUT VBAT 3 1338 6 Ordering Information Part / Order Number 1338-18DVGI 1338-18DVGI8 1338-18DCGI 1338-18DCGI8 1338AC-18SRI 1338AC-18SRI8 1338-31DVGI 1338-31DVGI8 1338-31DCGI 1338-31DCGI8 1338AC-31SRI 1338AC-31SRI8 Marking see page 17 Shipping Packaging Tubes Tape and Reel Tubes Tape and Reel Tubes Tape and Reel Tubes Tape and Reel Tubes Tape and Reel Tubes Tape and Reel Package 8-pin MSOP 8-pin MSOP 8-pin SOIC 8-pin SOIC 16-pin SOIC 16-pin SOIC 8-pin MSOP 8-pin MSOP 8-pin SOIC 8-pin SOIC 16-pin SOIC 16-pin SOIC Temperature -40 to +85° C -40 to +85° C -40 to +85° C -40 to +85° C -40 to +85° C -40 to +85° C -40 to +85° C -40 to +85° C -40 to +85° C -40 to +85° C -40 to +85° C -40 to +85° C The IDT1338 packages are RoHS compliant. Packages without the integrated crystal are Pb-free packages that include the integrated crystal as designated with a “C” before the dash number may include lead that is exempt under RoHS requirements. The lead finish is JESD91 category e3. While the information presented herein has been checked for both accuracy and reliability, Integrated Device Technology IDT assumes no responsibility for either its use or for the infringement of any patents or other rights of third parties, which would result from its use. No other circuits, patents, or licenses are implied. This product is intended for use in normal commercial applications. Any other applications such as those requiring extended temperature range, high reliability, or other extraordinary environmental requirements are not recommended without additional processing by IDT. IDT reserves the right to change any circuitry or specifications without notice. IDT does not authorize or warrant any IDT product for use in life support devices or critical medical instruments. REAL-TIME CLOCK WITH BATTERY BACKED NON-VOLATILE RAM 21 IDT1338 IDT1338 REAL-TIME CLOCK WITH BATTERY BACKED NON-VOLATILE RAM E F G H I J K L M Originator J. Sarma J.Sarma J.Sarma J.Sarma J.Sarma J.Sarma J.Sarma J.Sarma J.Sarma S.S. L Larsen S.S. S.S. J. Chao Date Description of Change 01/29/08 New device. Preliminary release. 03/28/08 Added new note to Part Ordering information pertaining to RoHS compliance and Pb-free devices. 04/03/04 combined -3 and -33 parts to -31 05/19/08 The part number for 16pin RoHS complaint part has now changed from IDT1338C-31SOGI to IDT1338C-31SRI and the IDT1338C-18SOGI changed to IDT1338C-18SRI 10/29/08 11/10/08 Updated Block Diagram Typical Operating Characteristics charts. 11/13/08 Updated graphs in “Typical Operating Characteristics added “Typical Operating Circuit” diagram 11/18/08 Updated graphs in “Typical Operating Characteristics updated Block Diagram added “Battery Backed” to device title. 12/02/08 Updated Typical Operating Characteristics graphs added marking diagrams. 11/10/09 Added “Handling, PCB Layout, and Assembly” section. 03/29/10 Added “Timeout” paragraph on page 04/13/11 Updated Supply Current speficiations 09/22/11 Changed “VCC Fall Time VPF MAX to VPF MIN ” spec from 300 µs Min. to 1ms Min. Table 2, “Power-Up/Down Characteristics 10/17/11 Added separate item for tVCCF in “Power-up/Down Conditions” table for 1338-31 300 µs min. 09/20/12 Moved all from Fab4 to TSMC. QA requested change in the marking of only the 16-pin SOIC device with internal crystal to add "A" due to the fact that TSMC uses a different crystal than Fab4. Notification of a change in orderables was initiated with PCN A1208-06. Updated 16-pin SOIC marking diagram and ordering information to include "A". REAL-TIME CLOCK WITH BATTERY BACKED NON-VOLATILE RAM 22 IDT1338 IDT1338 REAL-TIME CLOCK WITH BATTERY BACKED NON-VOLATILE RAM Innovate with IDT and accelerate your future networks. Contact: For Sales 800-345-7015 408-284-8200 Fax 408-284-2775 For Tech Support Corporate Headquarters Integrated Device Technology, Inc. 2012 Integrated Device Technology, Inc. All rights reserved. Product specifications subject to change without notice. IDT, ICS, and the IDT logo are trademarks of Integrated Device Technology, Inc. Accelerated Thinking is a service mark of Integrated Device Technology, Inc. All other brands, product names and marks are or may be trademarks or registered trademarks used to identify products or services of their respective owners. Printed in USA

PDF Datasheet Preview

DATASHEET

REAL-TIME CLOCK WITH BATTERY BACKED NON-VOLATILE RAM IDT1338

The IDT1338 is a serial real-time clock RTC device that consumes ultra-low power and provides a full binary-coded decimal BCD clock/calendar with 56 bytes of battery backed Non-Volatile Static RAM. The clock/calendar provides seconds, minutes, hours, day, date, month, and year information. The clock operates in either the 24-hour or 12-hour format with AM/PM indicator. The end of the month date is automatically adjusted for months with fewer than 31 days, including corrections for leap year. Access to the clock/calendar registers is provided by an I2C interface capable of operating in fast I2C mode. Built-in Power-sense circuitry detects power failures and automatically switches to the backup supply, maintaining time and date operation.
• Telecom Routers, Switches, Servers
• Handheld GPS, Point of Sale POS terminals
• Consumer Electronics Set-Top Box, Digital Recording,

Network Applications, Digital photo frames
• Office Fax/Printers, Copiers
• Medical Glucometer, Medicine Dispensers
• Others Thermostats, Vending Machines, Modems, Utility

Meters

Block Diagram
• Real-Time Clock RTC counts seconds, minutes, hours,
day, date, month, and year with leap-year compensation valid up to 2100
• 56-Byte battery-backed Non Volatile RAM for data
storage
• Fast mode I2C Serial interface
• Automatic power-fail detect and switch circuitry
• Programmable square-wave output
• Packaged in 8-pin MSOP, 8-pin SOIC, or 16-pin SOIC
surface-mount package with an integrated crystal
• Industrial temperature range -40°C to +85°C

Crystal inside package for 16-pin SOIC ONLY
kHz Oscillator and

Divider
1 Hz/4.096 kHz/ kHz/32.768 kHz

MUX/ Buffer

SQW/OUT

VCC GND VBAT

Power Control

Control Logic

Clock, Calendar Counter

SCL SDA

I2C Interface
56 Byte 1 Byte 7 Bytes RAM Control Buffer

REAL-TIME CLOCK WITH BATTERY BACKED NON-VOLATILE RAM 1

IDT1338

IDT1338 REAL-TIME CLOCK WITH BATTERY BACKED NON-VOLATILE RAM

Pin Assignment 8-pin MSOP/8-pin SOIC Pin Assignment 16-pin SOIC
8 VCC

X2 2 IDT

SQW/OUT

VBAT
3 1338 6
Ordering Information

Part / Order Number
1338-18DVGI 1338-18DVGI8 1338-18DCGI 1338-18DCGI8 1338AC-18SRI 1338AC-18SRI8 1338-31DVGI 1338-31DVGI8 1338-31DCGI 1338-31DCGI8 1338AC-31SRI 1338AC-31SRI8

Marking
see page 17

Shipping Packaging

Tubes Tape and Reel

Tubes Tape and Reel

Tubes Tape and Reel

Tubes Tape and Reel

Tubes Tape and Reel

Tubes Tape and Reel

Package
8-pin MSOP 8-pin MSOP 8-pin SOIC 8-pin SOIC 16-pin SOIC 16-pin SOIC 8-pin MSOP 8-pin MSOP 8-pin SOIC 8-pin SOIC 16-pin SOIC 16-pin SOIC

Temperature
-40 to +85° C -40 to +85° C -40 to +85° C -40 to +85° C -40 to +85° C -40 to +85° C -40 to +85° C -40 to +85° C -40 to +85° C -40 to +85° C -40 to +85° C -40 to +85° C

The IDT1338 packages are RoHS compliant. Packages without the integrated crystal are Pb-free packages that include the integrated crystal as designated with a “C” before the dash number may include lead that is exempt under RoHS requirements. The lead finish is JESD91 category e3.

While the information presented herein has been checked for both accuracy and reliability, Integrated Device Technology IDT assumes no responsibility for either its use or for the infringement of any patents or other rights of third parties, which would result from its use. No other circuits, patents, or licenses are implied. This product is intended for use in normal commercial applications. Any other applications such as those requiring extended temperature range, high reliability, or other extraordinary environmental requirements are not recommended without additional processing by IDT. IDT reserves the right to change any circuitry or specifications without notice. IDT does not authorize or warrant any IDT product for use in life support devices or critical medical instruments.

REAL-TIME CLOCK WITH BATTERY BACKED NON-VOLATILE RAM 21

IDT1338

IDT1338 REAL-TIME CLOCK WITH BATTERY BACKED NON-VOLATILE RAM

E F G H

I J K L M

Originator J. Sarma J.Sarma J.Sarma J.Sarma

J.Sarma J.Sarma J.Sarma J.Sarma

J.Sarma

S.S. L Larsen

S.S.

S.S. J. Chao

Date Description of Change
01/29/08 New device. Preliminary release.
03/28/08 Added new note to Part Ordering information pertaining to RoHS compliance and Pb-free devices.
04/03/04 combined -3 and -33 parts to -31
05/19/08 The part number for 16pin RoHS complaint part has now changed from IDT1338C-31SOGI to IDT1338C-31SRI and the IDT1338C-18SOGI changed to IDT1338C-18SRI
10/29/08
11/10/08 Updated Block Diagram Typical Operating Characteristics charts.
11/13/08 Updated graphs in “Typical Operating Characteristics added “Typical Operating Circuit” diagram
11/18/08 Updated graphs in “Typical Operating Characteristics updated Block Diagram added “Battery Backed” to device title.
12/02/08 Updated Typical Operating Characteristics graphs added marking diagrams.
11/10/09 Added “Handling, PCB Layout, and Assembly” section.
03/29/10 Added “Timeout” paragraph on page
04/13/11 Updated Supply Current speficiations
09/22/11 Changed “VCC Fall Time VPF MAX to VPF MIN ” spec from 300 µs Min. to 1ms Min. Table 2, “Power-Up/Down Characteristics
10/17/11 Added separate item for tVCCF in “Power-up/Down Conditions” table for 1338-31 300 µs min.
09/20/12
Moved all from Fab4 to TSMC. QA requested change in the marking of only the 16-pin SOIC device with internal crystal to add "A" due to the fact that TSMC uses a different crystal than Fab4. Notification of a change in orderables was initiated with PCN A1208-06. Updated 16-pin SOIC marking diagram and ordering information to include "A".

REAL-TIME CLOCK WITH BATTERY BACKED NON-VOLATILE RAM 22

IDT1338

IDT1338 REAL-TIME CLOCK WITH BATTERY BACKED NON-VOLATILE RAM

Innovate with IDT and accelerate your future networks. Contact:

For Sales
800-345-7015 408-284-8200 Fax 408-284-2775

For Tech Support

Corporate Headquarters

Integrated Device Technology, Inc.
2012 Integrated Device Technology, Inc. All rights reserved. Product specifications subject to change without notice. IDT, ICS, and the IDT logo are trademarks of Integrated Device Technology, Inc. Accelerated Thinking is a service mark of Integrated Device Technology, Inc. All other brands, product names and marks are or may be trademarks or registered trademarks used to identify products or services of their respective owners. Printed in USA

Notice: we do not provide any warranties that information, datasheets, application notes, circuit diagrams, or software stored on this website are up-to-date or error free. The archived 1338C-31SRI8 Datasheet file may be downloaded here without warranties.

Datasheet ID: 1338C-31SRI8 637242