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RX8900CE

FIXED FREQUENCIES: 32.768KHz
DIMENSIONS: 3.2 x 2.5 mm
PACKAGE: 2000 pieces/Reel
ROHS STATUS: Compliant
PN: X1B000301000200 X1B000301000212
Sample Download PDF
Parameter Table
 

Block diagram

Overview

  • High Stability
    • UA ± 3.4 x 10-6 / -40 °C to +85 °C ( Equivalent to ±9 seconds of month deviation )
    • UB ± 5.0 x 10-6 / -40 °C to +85 °C ( Equivalent to ±13 seconds of month deviation )
    • UC ± 5.0 x 10-6 / -30 °C to +70 °C ( Equivalent to ±13 seconds of month deviation )
  • 32.768 kHz frequency output function
    • FOUT pin output (C-MOS output), CL=30 pF
    • Output selectable: 32.768 kHz, 1024 Hz, 1 Hz
  • Available automatic battery backup switch-over function
    • Charge from VDD to backup battery connected to VBAT is possible.
           VDD voltage drop(VDET3) detection and automatically switches to the backup battery.
           This circuit is optimal to backup with a secondary battery and a large capacitor.
  • Timer function
    • Timer period is adjustable in 1/4096 second from 4095 minutes
  • Alarm function
    • Available dual-alarm, weekly and monthly
  • Temp. sensor function
    • Available readout temperature data from embedded temp sensor. (Bank.2_Add17h)


Specifications (characteristics)

Refer to application manual for details.
 

Electrical Characteristics

Item Symbol Conditions Min. Typ. Max. Unit
Operating voltage VDD Interface voltage 2.5 3.0 5.5 V
Temp. compensated Voltage VTEM Temp. compensated voltage 2.0 3.0 5.5 V
Clock supply voltage VCLK Internal clock 1.6 3.0 5.5 V
Operating temperature TOPR No condensation -40 +25 +85 *3 °C
Stability Δ f/f UA Ta=-40°C to+85°C ±3.4 *1 x10-6
UB Ta=-40°C to+85°C ±5.0 *2
UC Ta=-30°C to+70°C
Current consumption(1) lDD1 fSCL=0Hz,/INT=VDD,
FOE=GND,
VDD=VBAT FOUT:OFF Temp. Compensation
interval 2.0 s.		 VDD=5V - 0.72 1.5 µA
Current consumption(2) lDD2 VDD=3V - 0.70 1.4


*1 Equivalent to ±9 seconds of month deviation.
*2 Equivalent to ±13 seconds of month deviation.
*3 Please contact us about +85°C < TOPR

32.768 kHz-DTCXO Frequency temperature characteristics (Example)


 

Pin function

 
Signal Name I / O Function
T1(CE) input Use by the manufacture for testing.
( Do not connect externally.)
SCL input Serial clock input pin.
FOUT output The pin outputs the reference clock signal.
( CMOS output )
VBAT - Battery supply.
This pin has charge capability to backup battery.
VDD - Connected to a positive power supply
FOE input The input pin for the FOUT output control.
/ INT output Interrupt output (N-ch. open drain).
GND - Connected to a ground
T2(VPP) - Use by the manufacture for testing.
( Do not connect externally.)
SDA I/O Data input and output pin.


Terminal connection/External dimensions


(Unit: mm)
 

Footprint (Recommended)


 

(Unit: mm)

To maintain stable operation, provide a 0.1uF by-pass capacitor
at a location as near as possible to the power source terminal of the crystal product (between Vcc - GND).