Real time clock module Product Number (Please contact us) RTC-72421 : Q42724212xxxx00 RTC-72423 : Q42724232xxxx00 4-bit REAL TIME CLOCK MODULE RTC - 72421 RTC - 72423 Built-in crystal unit allows adjustment-free efficient operation. 24 h /12 h changeable and leap year automatically adjustable (Gregorian calendar). Actual size RTC-72421 RTC-72423 Block diagram RTC-72421/72423 OS C D3 D2 D1 D0 Gate WR RD Gate A3 A2 A1 A0 CS0 Latch C ounter R E S E T STOP bit bit 30 sec A D J bit S1 to CF Decoder H OLD bit BUSY bit S1 S10 M I1 D1 D10 M O1 M O10 24/12 bit M I10 H1 H 10 Y1 Y10 W Output S elector A LE CS1 CD CE CF STD .P 64 H z 1 S econd carry 1 M inute carry 1 H our carry Terminal connection/External dimensions (Unit:mm) RTC-72423 (SOP 24-pin) Pin terminal STD.P /CS 0 ALE A0 A1 A2 A3 /RD GND 23.1 Max. #18 1 2 3 4 5 6 7 8 9 #10 EPSON 6.3 RTC72421 A 1234A #1 #9 No. 18 17 16 15 14 13 12 11 10 Pin terminal V DD (V DD ) (V DD ) CS 1 C0 D1 D2 D3 /W R No. 16.3 Max. #24 RTC62423 RTC72423 EPSON 1234A #1 #12 7.62 0.2 4.2 Min. Max. 1.52 0.46 2.54 2.8 Max. 3.3 Min. 1.27 0.25 0 -15 0.35 0.1 Min. Specifications (characteristics) Input voltage Storage temperature * Symbol VDD Condition Ta=+25 C Min. -0.3 Max. +7.0 VI/O Ta=+25 C GND-0.3 VDD+0.3 TSTG RTC-72421 RTC-72423 -55 -55 +85 +125 Clock voltage Operating temperature Condition - Min. 4.5 Max. 5.5 VCLK - 2.0 5.5 TOPR RTC-72421 RTC-72423 -10 -40 +70 +85 Item V Current consumption C HIGH input voltage (1) LOW input voltage (1) VIH1 VIL1 LOW output voltage (1) VOL1 IOL=2.5 mA - HIGH output voltage VOH IOH=-400 A 2.4 LOW output voltage (2) OFF leak current VOL2 IOFFLK IOL=2.5 mA V1=VDD/0 V Unit Frequency precision f /f Frequency temperature characteristics Frequency voltage characteristics Aging TOP Condition 72421A 72421B Ta=+25 C VDD=5.0 V 72423A 72423B -10 C to +70 C (+25 C) -40 C to +85 C(+25 C) Range 10 50 20 50 +10 / -120 +10 / -220 Symbol IDD1 IDD2 V Input capacity C Frequency characteristics Symbol 0 - 10 1.0 Unit Stored as bare produc after unpacking Item 0.2 *Refer to application manual for details. Operating range Symbol VDD Pin terminal V DD (V DD ) (V DD ) N.C. CS 1 D0 N.C. N.C. D1 D2 D3 /W R 24 23 22 21 20 19 18 17 16 15 14 13 DC characteristics *Stored as bare product after unpacking Item Power voltage No. Metal may be exposed on the top or bottom of this product. This will not affect any quality, reliability or electrical spec. Absolute Max. rating Item Supply voltage Pin terminal STD.P /CS 0 N.C. ALE A0 N.C. A1 N.C. A2 A3 /RD GND 1 2 3 4 5 6 7 8 9 10 11 12 #13 7.9 No. 12.2 Max. RTC-72421 (DIP 18-pin) Unit 10-6 f/V Ta=+25 C,VDD=2.0 V to 5.5 V 5.0 Max. 10-6/V fa Ta=+25 C,VDD=5.0 V,First year 5.0 Max. 10-6/year C1 HIGH input voltage (2) VIH2 LOW input voltage (2) VIL2 Input leak current (1) ILK1 Input leak current (2) ILK2 Condition CS1= 0 V VDD=5 V Exclude input/ output current VDD=2 V - Input frequency 1 MHz VDD=2.0 V to 5.5 V Min. - Typ. 1 0.9 2.2 - - 5 0.8 V - V 0.4 10/-10 A 10 20 - 4/5 VDD - Unit Applicable terminal A All inputs other than CS1 0.4 - 1/5 VDD - V1=VDD/0 V Max. 10 1/-1 10/-10 pF D0 to D3 STD.P Input other than D0 to D3 D0 to D3, STD.P V CS1 A Input other than D0 to D3 D0 to D3 PROMOTION OF ENVIRONMENTAL MANAGEMENT SYSTEM CONFORMING TO INTERNATIONAL STANDARDS At Seiko Epson, all environmental initiatives operate under the Plan-Do-Check-Action (PDCA) cycle designed to achieve continuous improvements. The environmental management system (EMS) operates under the ISO 14001 environmental management standard. All of our major manufacturing and non-manufacturing sites, in Japan and overseas, completed the acquisition of ISO 14001 certification. ISO 14000 is an international standard for environmental management that was established by the International Standards Organization in 1996 against the background of growing concern regarding global warming, destruction of the ozone layer, and global deforestation. WORKING FOR HIGH QUALITY In order provide high quality and reliable products and services than meet customer needs, Seiko Epson made early efforts towards obtaining ISO9000 series certification and has acquired ISO9001 for all business establishments in Japan and abroad. We have also acquired ISO/TS 16949 certification that is requested strongly by major automotive manufacturers as standard. ISO/TS16949 is the international standard that added the sector-specific supplemental requirements for automotive industry based on ISO9001. Explanation of the mark that are using it for the catalog Pb free. Complies with EU RoHS directive. *About the products without the Pb-free mark. Contains Pb in products exempted by EU RoHS directive. (Contains Pb in sealing glass, high melting temperature type solder or other.) The products have been designed for high reliability applications such as Automotive. Notice * * * * * * This material is subject to change without notice. Any part of this material may not be reproduced or duplicated in any form or any means without the written permission of Seiko Epson. The information about applied circuitry, software, usage, etc. written in this material is intended for reference only. Seiko Epson does not assume any liability for the occurrence of infringing on any patent or copyright of a third party. This material does not authorize the licensing for any patent or intellectual copyrights. When exporting the products or technology described in this material, you should comply with the applicable export control laws and regulations and follow the procedures required by such laws and regulations. You are requested not to use the products (and any technical information furnished, if any) for the development and/or manufacture of weapon of mass destruction or for other military purposes. You are also requested that you would not make the products available to any third party who may use the products for such prohibited purposes. These products are intended for general use in electronic equipment. When using them in specific applications that require extremely high reliability, such as the applications stated below, you must obtain permission from Seiko Epson in advance. / Space equipment (artificial satellites, rockets, etc.) / Transportation vehicles and related (automobiles, aircraft, trains, vessels, etc.) / Medical instruments to sustain life / Submarine transmitters / Power stations and related / Fire work equipment and security equipment / traffic control equipment / and others requiring equivalent reliability. * All brands or product names mentioned herein are trademarks and/or registered trademarks of their respective. Seiko Epson Corporation