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X1240 Datasheet(PDF) 14 Page - Xicor Inc.

Part No. X1240
Description  Real Time Clock/Calendar with EEPROM
Download  19 Pages
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Maker  XICOR [Xicor Inc.]
Homepage  http://www.xicor.com
Logo XICOR - Xicor Inc.

X1240 Datasheet(HTML) 14 Page - Xicor Inc.

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X1240
14
(3)
The device goes into the Timekeeping state 200nS after any stop, except those that initiate a non-volatile write cycle; tWC after a
stop that initiates a non-volatile write cycle; or 9 clock cycles after any start that is not followed by the correct Device Select Bits in
the Slave Address Byte.
(4)
For reference only and not tested.
(5)
VIL = VCC x 0.1, VIH = VCC x 0.9, fSCL = 400KHz, SDA = Open
(6)
VIL = VCC x 0.1, VIH = VCC x 0.9, fSCL = 400KHz, fSDA = 400KHz, Vcc = 1.22 x Vcc Min
(7)
VCC = 0V.
(8)
VBACK= 0V.
(9)
VSDA=VSCL=VCC, Others=GND or VCC
(10) VSDA=VSCL=VBACK, Others=GND or VBACK
(11) VSDA = GND to VCC, VCLK = GND or VCC
(12) IOL = 3.0mA at 5V, 1.5mA at 2.7V
(13) IOH = -1.0mA at 5V, -0.4mA at 2.7V
(14) Threshold voltages based on the higher of Vcc or Vback.
(15) Driven by external 32.768KHz square wave oscillator on X1, X2 open.
(16) Using recommended crystal and oscillator network applied to X1 and X2 (25°C).
(17) Periodically sampled and not 100% tested.
CAPACITANCE (TA = 25˚C, f = 1.0 MHz, VCC = 5V)
Notes: (1) This parameter is periodically sampled and not 100% tested.
AC CHARACTERISTICS
Symbol
Parameter
Max
Units
Test Conditions
COUT
(Notes:)
Output Capacitance (SDA)
8pF
VOUT = 0V
CIN
(Notes:)
Input Capacitance (SCL)
6pF
VIN = 0V
AC Test Conditions
EQUIVALENT AC OUTPUT LOAD CIRCUIT FOR
VCC = 5V (Standard Output Load for testing the device
with VCC = 5.0V)
Input Pulse Levels
VCC x 0.1 to VCC x 0.9
Input Rise and Fall Times
10ns
Input and Output Timing
Levels
VCC x 0.5
Output Load
Standard Output Load
SDA
1533
100pF
5.0V
For VOL= 0.4V
and IOL = 3 mA


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