RX8025T-UC

Epson Toyocom Real time clock module Product Number (Please contact us) RX-8025T : X1B0000120010 Built-in 32.768 kHz-DTCXO, High Stability I2C-Bus INTERFACE REAL TIME CLOCK MODULE RX – 8025T •Built in frequency adjusted 32.768 kHz crystal unit and DTCXO. •Interface Type : I2C-Bus Interface (400 kHz) •Interface voltage range : 1.8 V to 5.5 V •Temp.compensated voltage range: 2.2 V to 5.5 V •Wide Timekeeper voltage range : 1.6 V to 5.5 V •32.768 kHz frequency output function : C-MOS output With Control Pin •The various functions include full calendar, alarm, timer. Actual size * The I2C-Bus is a trademark of NXP Semiconductors Block diagram Overview • High Stability •UA ± 1.9 x 10-6 / 0 ºC to +40 ºC ( Equivalent to 5 seconds of month deviation ) -6 ± 3.4 x 10 / -40 ºC to +85 ºC ( Equivalent to 9 seconds of month deviation ) •UB ± 3.8 x 10-6 / 0 ºC to +50 ºC ( Equivalent to 10 seconds of month deviation ) ± 5.0 x 10-6 / -40 ºC to +85 ºC ( Equivalent to 13 seconds of month deviation ) 32.768 kHz 32kHz DTCXO CLOCK and CALENDAR DIVIDER FOUT FOE FOUT CONTROLLER TIMER REGISTER / INT INTERRUPT CONTROLLER ALARM REGISTER • 32.768 kHz frequency output function • FOUT pin output (C-MOS output), CL=30 pF • Output selectable < 32.768 kHz, 1024 Hz, 1 Hz > • The various interrupt • Timer Function can be set up between 1/ 4096 second and 255 minutes. • Alarm Function can be set to day of week, day, hour, or minute. CONTROL REGISTER SCL INTERFACE CIRCUIT SDA and SYSTEM CONTROLLER Pin Function Terminal connection / External dimensions 1 input SCL 2 input FOUT 3 Output TEST 5 input 1. T1(CE) 2. SCL 3. FOUT 4. N.C. The input pin for the FOUT output control. 5. TEST 6. VDD 7. FOE Serial clock input pin The pin outputs the refarence clock signal. ( CMOS output ) * Use by the manufacture for testing. ( Do not connect externally.) VDD 6 - FOE 7 input / INT 10 Output Interrupt output ( N-ch open drain ) Connected to a positive power supply Connected to a ground * Use by the manufacture for testing. ( Do not connect externally.) GND 11 - T2(VPP) 12 - SDA 13 I/O (Unit:mm) RX − 8025T 0.2 T1(CE) Function * Use by the manufacture for testing. ( Do not connect externally.) 10.1 ± I/O 14. N.C. 13. SDA 12. T2(VPP) 11. GND 5.0 10. / INT 9. N.C. 8. N.C. 3.2 ± 0.1 Pin No. 1.27 Signal Name 7.4 ± 0.2 SOP − 14 pin Data input and output pin Metal may be exposed on the top or bottom of this product. This will not affect any quality, reliability or electrical spec. ∗ Refer to application manual for details. Specifications (characteristics) Stability Current consumption (1) Current consumption (2) ∗1 ) Δf/f IBK1 IBK2 „ 32.768 kHz-DTCXO Frequency temperature characteristics (Example) Min. 1.8 Typ. 3.0 Max. 5.5 Unit V Temp. compensated voltage 2.2 3.0 5.5 V Ta = 0 ºC to +40 ºC UA Ta = -40 ºC to +85 ºC Ta = 0 ºC to +50 ºC UB Ta = -40 ºC to +85 ºC Backup Mode VDD = 5 V FOE = GND, /INT = VDD FOUT output : OFF VDD = 3 V 1.6 −40 5.5 +85 V °C - 3.0 +25 ±1.9 ∗1 ±3.4 ∗2 ±3.8 ∗3 ±5.0 ∗4 1.2 × 10 −6 3.4 μA - 0.8 2.8 Equivalent to 5 seconds of month deviation. ∗2 ) Equivalent to 9 seconds of month deviation. ∗3 ) Equivalent to 10 seconds of month deviation. ∗4 ) Equivalent to 13 seconds of month deviation. Frequency temperature characteristics 10 5 32.768 kHz DTCXO -6 Condition Interface voltage Frequency tolerance ( ×10 ) „ Electrical Characteristics Item Symbol Interface voltage VDD Temp. compensated VTEM voltage Clock voltage VCLK Operating temperatue TOPR 0 -5 -10 -15 Tuning fork X'tal -20 -25 -30 -45 -35 -25 -15 -5 5 15 25 Temperature (ºC) http://www.epsontoyocom.co.jp 35 45 55 65 75 85