RRRReeeeaaaallll ti ti ti time cme cme cme clllloooocccck moduk moduk moduk modulllleeee 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 OSC Counter D3 RESET STOP HOLD BUSY D2 Gate bit bit bit bit 24/1 D1 bit 30 sec ADJ D0 bit S1 S10 MI1 MI10 H1 H10 W WR Gate RD S1 to A3 CF A2 D1 D10 MO1 MO10 Y1 Y10 Decoder A1 Latch A0 CS0 Output Selector ALE STD.P 64 Hz CS1 1 Second carry 1 Minute carry CD CE CF 1 Hour carry Terminal connection/External dimensions (Unit:mm) RTC-72421 (DIP 18-pin) RTC-72423 (SOP 24-pin) No. Pin No. Pin No. Pin No. Pin 16.16.3 M3 Maax.x. 23.1 Max. terminal terminal terminal terminal 1 STD.P 18 VDD 2 244 1 133 18 10 1 STD.P 24 VDD 2 /CS0 17 (VDD) 2 /CS0 23 (VDD) DD RTC72421 A 3 ALE 16 (V ) 3 N.C. 22 (VDD) 4 A0 15 CS1 4 ALE 21 N.C. RTRTCC672423 2423 EPSON 1234A 5 A1 14 C0 5 A0 20 CS1 6 A2 13 D1 6 N.C. 19 D0 EPSOEPSONN 12341234AA 1 9 7 A3 12 D2 7 A1 18 N.C. 8 /RD 11 D3 8 N.C. 17 N.C. 9 GND 10 /WR 9 A2 16 D1 1 1 1 122 10 A3 15 D2 11 /RD 14 D3 7.62 12 GND 13 /WR 0.2 4.2 0.0.2 2 Min. Max. 2.2.8 M8 Maax.x. 1.52 0.46 3.3 0.0.1 M1 Miinn.. 00 - 1 - 100 1.0 Min. 0.35 1.27 2.54 0.25 0 -15 Metal may be exposed on the top or bottom of this product. This will not affect any quality, reliability or electrical spec. Specifications (characteristics) *Refer to application manual for details. Absolute Max. rating DC characteristics Item Symbol Condition Min. Max. Unit Item Symbol Condition Min. Typ. Max. Unit Applicable terminal CS1= 0 V Supply voltage VDD Ta=+25 C -0.3 +7.0 IDD1 VDD=5 V 1 10 - V Current consumption Exclude input/ - A Input voltage VI/O Ta=+25 C GND-0.3 VDD+0.3 IDD2 VDD=2 V 0.9 5 - output current Storage RTC-72421 -55 +85 HIGH input voltage (1) VIH1 2.2 - All inputs other than TSTG C - V temperature * CS1 RTC-72423 -55 +125 LOW input voltage (1) VIL1 - 0.8 *Stored as bare product after unpacking LOW output voltage (1) VOL1 IOL=2.5 mA - 0.4 D0 to D3 - HIGH output voltage VOH IOH=-400 A 2.4 - V Operating range LOW output voltage (2) VOL2 IOL=2.5 mA 0.4 Item Symbol Condition Min. Max. Unit STD.P Power voltage VDD - 4.5 5.5 OFF leak current IOFFLK V1=VDD/0 V 10/-10 A V - Input other than Clock voltage VCLK - 2.0 5.5 10 Input frequency Input capacity C1 pF D0 to D3 1 MHz - Operating RTC-72421 -10 +70 20 D0 to D3, STD.P TOPR C temperature RTC-72423 -40 +85 HIGH input voltage (2) VIH2 4/5 VDD VDD=2.0 V to 5.5 V V CS1 LOW input voltage (2) VIL2 - 1/5 VDD Stored as bare produc after unpacking - Input other than Input leak current (1) ILK1 1/-1 A Frequency characteristics D0 to D3 V1=VDD/0 V - Input leak current (2) ILK2 10/-10 D0 to D3 Item Symbol Condition Range Unit 72421A 10 72421B 50 Frequency Ta=+25 C f /f precision VDD=5.0 V 72423A 20 -6 10 72423 50 Frequency -10 C to +70 C (+25 C) +10 / -120 temperature TOP -40 C to +85 C(+25 C) +10 / -220 characteristics Frequency voltage -6 f/V Ta=+25 C,VDD=2.0 V to 5.5 V 5.0 Max. 10 /V characteristics -6 Aging fa Ta=+25 C,VDD=5.0 V,First year 5.0 Max. 10 /year 3D STRATEGY EPSON TOYOCOM In order to meet customer needs in a rapidly advancing digital, Quartz devices have become crucial in the network environment broadband and ubiquitous society, we are committed to offering where products are increasingly intended for broadband, products that are one step ahead of the market and a rank above ubiquitous applications and where various types of terminals can the rest in quality. To achieve our goals, we follow a 3D (three transfer information almost immediately via LAN and WAN on a device) strategy designed to drive both horizontal and vertical global scale. Epson Toyocom Corporation addresses every single growth. We will to grow our three device categories of Timing aspect within a network environment. The new corporation offers Devices, Sensing Devices and Optical Devices, and expand Digital Convergence solutions to problems arising with products vertical growth through a combination of products from these for consumer use, such as, core network systems and automotive categories. systems. PROMOTION OF ENVIRONMENTAL MANAGEMENT SYSTEM CONFORMING TO INTERNATIONAL STANDARDS At Epson Toyocom, 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. In the future, new group companies will be expected to acquire the certification around the third year of operations. 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 Epson Toyocom quickly began working to acquire company-wide ISO 9000 series certification, and has acquired ISO 9001 or ISO 9002 certification for all targeted products manufactured in Japanese and overseas plants. Epson Toyocom has acquired QS-9000 certification, which is of a higher level. Also, TS 16949 certification, which is also of a higher level, has been acquired. QS-9000 is an enhanced standard for quality ISO/TS 16949 is a global standard based on assurance systems formulated by leading QS-9000, a severe standard corresponding to U.S.automobile manufacturers based on the requirements from the automobile industry. the international ISO 9000 series. 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 on 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. 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.