RRRReeeeaaaallll ttttiiiimmmmeeee cccclllloooocccckkkk mmmmoooodddduuuulllleeee Product Number (Please contact us) RTC-72421A : Q42724212000100 REAL TIME CLOCK MODULE (4-bit) RTC-72421B : Q42724212000200 RTC-72423A : Q42724232000600 RTC-72423B : Q42724232000700 RTC - 72421 R TC - 72423 Built-in crystal unit allows adjustment-free efficient operation. 24 h /12 h changeable and leap year automatically adjustable (Gregorian calendar). Actual size Note RTC-72421 7242series does not have complete compatibility ability for RTC-72423 theold product RTC-6242 series. when replace to 7242series from 6242 series, confirm the technical information of RTC7242 latest manual by all means. Block diagram RTC-72421/72423 OSC Counter D3 RESET STOP HOLD BUSY D2 Gate bit bit bit bit 24/12 D1 bit 30 sec ADJ D0 bit S1 S10 MI1 M I10 H1 H10 W W R Gate RD S1 to A3 CF A2 D1 D10 MO1 M O10 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 1166..33 MMaaxx.. 23.1 Max. terminal terminal terminal terminal 1 STD.P 18 VDD 2244 1133 1 STD.P 24 VDD 18 10 2 /CS0 17 (VDD) 2 /CS0 23 (VDD) 3 ALE 16 (VDD) RTC72421 A 3 N.C. 22 (VDD) 4 A0 15 CS1 4 ALE 21 N.C. RRTTCC7622442233 EPSON 1234A 5 A1 14 C0 5 A0 20 CS1 6 A2 13 D1 6 N.C. 19 D0 EEPPSSOONN 11223344AA 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 11 1122 10 A3 15 D2 11 /RD 14 D3 7.62 12 GND 13 /WR 0.2 4.2 00..22 Min. Max. 22..88 MMaaxx.. 1.52 0.46 3.3 00..11 MMiinn.. 00 -- 1100 1.0 Min. 0.35 1.27 2.54 0.25 0 -15 The metal case inside of the molding compound may be exposed on the top or bottom of this product. This purely cosmetic and does not have any effect on quality, reliability or electrical specs. Specifications (characteristics) *Refer to application manual for details. Absolute Max. rating DC characteristics Item Symbol Conditions Min. Max. Unit Item Symbol Conditions 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 Conditions 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 D0 to D3 Input capacity C1 pF 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 Conditions Range Unit 72421A 10 72421B Frequency Ta=+25 C 50 f /f precision VDD=5.0 V 72423A 20 -6 10 72423B 50 Frequency +10 / -120 -10 C to +70 C (+25 C) 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 6.3 77.9.9 12.212.2 M Maxax.. 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 ISO 14000 is an international standard for environmental improvements. The environmental management system (EMS) management that was established by the International operates under the ISO 14001 environmental management standard. Standards Organization in 1996 against the background of All of our major manufacturing and non-manufacturing sites, in growing concern regarding global warming, destruction of the ozone layer, and global deforestation. Japan and overseas, completed the acquisition of ISO 14001 certification. WORKING FOR HIGH QUALITY In order provide high quality and reliable products and services than meet customer needs, ISO/TS16949 is the international standard that added the Seiko Epson made early efforts towards obtaining ISO9000 series sector-specific supplemental requirements for automotive certification and has acquired ISO9001 for all business industry based on ISO9001. establishments in Japan and abroad. We have also acquired ISO/TS 16949 certification that is requested strongly by major automotive manufacturers as standard. 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.) Designed for automotive applications such as Car Multimedia, Body Electronics, Remote Keyless Entry etc. Designed for automotive applications related to driving safety (Engine Control Unit, Air Bag, ESC etc ). 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 data, circuitry, software, usage, etc. written in this material is intended for reference only. Seiko Epson does not assume any liability for the occurrence of customer damage or 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. 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