Real time clock module Epson Toyocom Product Number (Please contact us) RTC-72421 : Q42724211xxxx00 RTC-72423 : Q42724231xxxx00 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 RT C-7 2421 /724 23 OS C D3 D2 D1 D0 Gat e WR RD Gat e A3 A2 A1 A0 C S0 Latc h Count er R ESET S TOP bi t bit 30 s ec AD J bit De coder S1 t o CF H OLD bit S1 S 10 D1 D 10 MI1 BU SY bit 24/12 bi t M I10 H1 H 10 M O 1 MO 10 Y1 Y10 W O u tp u t S e le c to r ALE C S1 CD CE CF S TD . P 64 Hz 1 Sec ond carry 1 M inut e c arry 1 H our c arry Terminal connection/External dimensions (Unit:mm) R TC -72423 (SOP 24-pin) Pin te rmina l STD.P /CS 0 AL E A0 A1 A2 A3 /RD GND 2 3.1 Ma x. #18 1 2 3 4 5 6 7 8 9 #10 EPSON 6.3 RTC7 2421 A 1234A #1 #9 No . 18 17 16 15 14 13 12 11 10 Pin te rmina l VDD (VD D) (VD D) CS1 C0 D1 D2 D3 /W R No . 16.3 Max. #24 #1 3 RTC 72423 62423 EPSON 1 234A #1 7.9 No . #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 * Condition Ta=+25 °C Min. -0.3 VI/O Ta=+25 °C GND-0.3 VDD+0.3 TSTG RTC-72421 RTC-72423 -55 -55 +85 +125 Clock voltage Operating temperature Ma x. +7.0 Condition - Min. 4.5 Ma x. 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) LOW output voltage (1) VIH1 VIL1 VOL1 IOL=2.5 mA 2.2 - HIGH output voltage VOH IOH=-400 µA 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 72423 -10 °C to +70 °C (+25 °C) -40 °C to +85 °C(+25 °C) 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 te rmina l VD D (VD D) (VD D) N.C. CS1 D0 N.C. N.C. D1 D2 D3 /WR 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 expo sed o n the top or bottom of th is pro duct. T his w ill not affect any qu ality, re liability o r electrical spec. Absolute Max. rating Item Symbol Supply voltage VDD Pin te rmina l STD.P /CS 0 N.C. AL E A0 N.C. A1 N.C. A2 A3 /RD GND 1 2 3 4 5 6 7 8 9 10 11 12 12. 2 Max. RTC-72 421 (DIP 18 -pin) Range ±10 ±50 ±20 ±50 +10 / -120 +10 / -220 Unit HIGH input voltage (2) LOW input voltage (2) C1 VIH2 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 MH z VDD=2.0 V to 5.5 V ×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 http://www.epsontoyocom.co.jp Min. - - Typ. 1 0.9 - 4/5 VDD - Unit Applicable terminal µA V - V 0.4 10/-10 µA 10 20 - 5 0.8 0.4 1/5 VDD V1=VDD/0 V Ma x. 10 1/-1 10/-10 pF All inputs other than CS1 D0 to D3 STD.P Input other than D0 to D3 D0 to D3, STD.P V CS1 µA Input other than D0 to D3 D0 to D3 “QMEMS” EPSON TOYOCOM In order to meet customer needs in a rapidly advancing digital, broadband and ubiquitous society, we are committed to offering products that are one step ahead of the market and a rank above the rest in quality. To achieve our goals, we follow a “3D (three device) strategy” designed to drive both horizontal and vertical growth. We will to grow our three device categories of “Timing Devices”, ”Sensing Devices” and “Optical Devices”, and expand vertical growth through a combination of products from these categories. A Quartz MEMS is any high added value quartz device that exploits the characteristics of quartz crystal material but that is produced using MEMS (micro-electro-mechanical system) processing technology. Market needs are advancing faster than previously imagined toward smaller, more stable crystal products, but we will stay ahead of the curve by rolling out products that exceed market speed and quality requirements. We want to further accelerate the 3D strategy by QMEMS. Quartz devices have become crucial in the network environment where products are increasingly intended for broadband, ubiquitous applications and where various types of terminals can transfer information almost immediately via LAN and WAN on a global scale. Epson Toyocom Corporation addresses every single aspect within a network environment. The new corporation offers “Digital Convergence” solutions to problems arising with products for consumer use, such as, core network systems and automotive systems. PROMOTION OF ENVIRONMENTAL MANAGEMENT SYSTEM CONFORMING TO INTERNATIONAL STANDARDS At Epson Toyocom, all environmental initiatives operate under ISO 14000 is an international standard for environmental management the Plan-Do-Check-Action(PDCA) cycle designed to achieve that was established by the International Standards Organization in 1996 continuous improvements. The environmental management against the background of growing concern regarding global warming, system (EMS) operates under the ISO 14001 environmental destruction of the ozone layer and global deforestation management standard. All of our major manufacturing and non-manufacturing sites,in Japan and overseas, completed the acquisition of ISO 14001 certification. In the future, new group companies will be expected to acquire the certification around the third year of operations. WORKING FOR HIGH QUALITY In order provide high quality and reliable products and services than meet customer needs, Epson Toyocom 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. QS-9000 is an enhanced standard for quality assurance systems formulated by leading U.S. automobile manufacturers based on the international ISO 9000 series. ISO/TS 16949 is a global standard based on QS-9000, a severe standard corresponding to the requirements from the automobile industry. ►Explanation of the mark that are using it for the catalog ►Pb free. ►Complies with EU RoHS directive. ►Pb free terminal designed. Contains Pb in products exempted by RoHS directive. (Contains Pb in sealing glass, high melting temperature type solder or other.) ►Complies with EU RoHS directive. ►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 Epson Toyocom. ●The information, applied circuitry, programming, usage, etc., written in this material is intended for reference only. Epson Toyocom 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. ●Any product described in this material may contain technology or the subject relating to strategic products under the control of the Foreign Exchange and Foreign Trade Law of Japan and may require an export license from the Ministry of International Trade and Industry or other approval from another government agency. ●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 Epson Toyocom 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. ● In this new crystal master for Epson Toyocom, product codes and markings will remain as previously identified prior to the merger. Due to the on-going strategy of gradual unification of part numbers, please review product codes and markings, as they will change during the course of the coming months. We apologize for the inconvenience, but we will eventually have a unified part numbering system for Epson Toyocom that will be user friendly.