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Interface type : 3 wire / 4 wire SPI-Bus High stability XS : ±3.0 x 10-6 / -40 ºC to +85 ºC (Monthly rate: ±8 seconds) : ±5.0 x 10-6 / +85 ºC to +105 ºC (Monthly rate: ±13.2 seconds) XB : ±5.0 x 10-6 / -40 ºC to +85 ºC (Monthly rate: ±13.2 seconds) : ±8.0 x 10-6 / +85 ºC to +105 ºC (Monthly rate: ±21 seconds) Time stamp function Trigger source: External event (EVIN) input, voltage drop/oscillation stop status detected, command input from the host Record data: 1/1024 seconds to 1 second, seconds, minutes, hours, days, months, years Number of recordable events: Maximum 32 events Backup power supply switching function The VDD and VBAT voltages are monitored to switch between Normal mode (VDD operation) and Backup mode (VBAT operation). Clock output (FOUT) Selectable from 32.768 kHz, 1024 Hz and 1 Hz outputs Output can be controlled by a register or FOE input (selectable with a register). Pin Function Terminal connection/External dimensions (Unit: mm) RX4901CE 1. 10. 2. 9. 3. 8. 4. 7. 5. 6. 2.5 ± 0.2 0.2 Min. Specifications (characteristics) Refer to application manual for details Recommended Operating Conditions Item Symbol Condition Min. Typ. Max. unit Operating voltage VDD - 1.6 3.0 5.5 V Clock supply voltage VCLK - 1.1 3.0 5.5 V Operating Temperature Ta - -40 +25 +105 ºC VDD detection voltage -VDET1 VDD, Fall 1.35 1.45 1.55 V Frequency Characteristics Item Symbol Condition Min. Typ. Max. unit Frequency tolerance f/f XS Ta = -40 to +85 C -3 - +3 XB Ta = -40 to +85 C -5 - +5 start-up time tSTA Ta = +25 C, Item Symbol Condition Min. Typ. Max. unit IDD IBAT VBAT = 3.0 V, /INT= Hi-Z, FOUT: Output OFF (Hi-Z), Temperature compensation interval: 2 s, FSEL1= FSEL0 = 1, INIEN = 1, CHGEN = 0, CE = L - 240 1500 nA I32k VDD = 3.0 V, /INT= Hi-Z, FOUT: 32 kHz output, CL = 0 pF, Temperature compensation interval: 2 s, FSEL1 = FSEL0 = 0, INIEN = 1, CHGEN = 0, CE = L - 1.0 3.0 A Option I/F Option EVIN pin Number /INTpin Number FOUT Number of time stamps recorded by EVIN terminal trigge FIFO Mode Direct Mode SPI 3 wire A 1 1 Yes 32 times 12 times B 2 1 - 32 times 22 times SPI 4 wire C 0 1 Yes 0 time 0 time D 1 1 - 32 times 10 times REAL TIME CLOCK MODULE (SPI-Bus) Built-in 32.768 kHz-DTCXO, +105C operating temperature, Low current consumption, Built-in power supply switching circuit and Time stamp function up to 32 records RX4901CE Built in frequency adjusted 32.768 kHz crystal unit and DTCXO Interface Type : 3 wire / 4 wire SPI-Bus Current consumption : 240 nA / 3 V (Typ.) Auto power switching function : Automatically switches to backup power supply by monitoring the V DD / VBAT voltage Time stamp function : Maximum 32 time stamps Interrupt output : Wake up every hour or every minute or every second Alarm interruption : Day, date, hour, minute, second Auto repeat wakeup timer interruption Self-monitoring interruption : Crystal oscillation stop, VBAT low, VDD low Signal Name I / O Function EVIN1,2,3 Input External event input pins. Detectable even in Backup mode. Pull-up and pull-down is configurable by the resisters CE Input Slave select input pin A pull-down resistor (Typ. 300 kΩ) is included CLK Input Serial clock input pin DI Input Serial data input pin (4 wire) DO Output Serial data Output pin (4 wire) DIO Input / Output Serial data input/output pin (3 wire) FOUT Output Frequency output pin (CMOS). 32.768 kHz (default), 1024 Hz or 1 Hz clock output is selectable. This pin can be switched to the wakeup timer interrupt output (CMOS) /INT Output Interrupt output pin (N-ch. open drain). The wakeup timer, time update, alarm, and/or event detection interrupt signals can be selected to output from this pin. When two or more signals are selected, they are NORed before being output. This pin is effective even in Backup mode. VDD - Power-supply pin VOUT - Internal operating voltage output pin Connect a 1.0 µF bypass capacitor to this pin. VBAT - Backup power supply pin Connect a backup power supply such as a large-size capacitor, secondary battery, or primary battery. The operating power voltage is supplied from this pin to the internal circuits in Backup mode. GND - Ground pin RX4901CE Product Number (2,000 pcs / Reel) RX4901CE XS A0：X1B000471000115 RX4901CE XB A0：X1B000471000215 RX4901CE XS B0：X1B000471000315 RX4901CE XB B0：X1B000471000415 RX4901CE XS C0：X1B000471000515 RX4901CE XB C0：X1B000471000615 RX4901CE XS D0：X1B000471000715 RX4901CE XB D0：X1B000471000815 Pin Connection Opt. A Opt. B Opt. C Opt. D 3 wire 4 wire 1 VDD 2 VOUT 3 VBAT 4 FOUT EVIN3 FOUT EVIN3 5 CLK 6 CE 7 DIO DO 8 /INT 9 GND 10 EVIN2 DI
① ② ③ ① Model CE type package 3.2 x 2.5 x 1.0 mm ② Frequency tolerance XS: ±3.0 x 10-6 / -40 ºC to +85 ºC (Monthly rate: ±8 seconds) ±5.0 x 10-6 / +85 ºC to +105 ºC (Monthly rate: ±13.2 seconds) XB: ±5.0 x 10-6 / -40 ºC to +85 ºC (Monthly rate: ±13.2 seconds) ±8.0 x 10-6 / +85 ºC to +105 ºC (Monthly rate: ±21 seconds) ③ Pin Option A: Option A B: Option B C: Option C D: Option D
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. 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 acqui red ISO9001 for all b usiness establishments in Japan and abroad. We have also acquired IATF 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：PLEASE READ CAREFULLY BELOW BEFORE THE USE OF THIS DOCUMENT ©Seiko Epson Corporation 2020 1. The content of this document is subject to change without notice. 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