X1243 Datasheet, PDF (15/18 Pages) Xicor Inc. – Real Time Clock/Calendar/Alarm with EEPROM

X1243
3: V_IL = V_CC x 0.1, V_IH = V_CC x 0.9, f_SCL = 400KHz, SDA = Open
4: V_CC = 0V.
5: V_BACK= 0V.
6: V_SDA=V_SCL=V_BACK, Others=GND or V_BACK
7: V_SDA = GND to V_CC, V_CLK = GND or V_CC
8: I_OL = 3.0mA at 5V, 1.5mA at 1.8V
9: Threshold voltages based on the higher of Vcc or Vback.
10: Driven by external 32.768KHz square wave oscillator on X1, X2 open.
11: Using recommended crystal and oscillator network applied to X1 and X2 (25°C).
Capacitance (T_A = 25˚C, f = 1.0 MHz, V_CC = 5V)
Symbol
C_OUT ⁽¹⁾
C_IN ⁽¹⁾
Parameter
Output Capacitance (SDA, IRQ)
Input Capacitance (SCL)
1. This parameter is periodically sampled and not 100% tested.
AC CHARACTERISTICS
AC Test Conditions
Input Pulse Levels
Input Rise and Fall Times
Input and Output Timing
Levels
Output Load
V_CC x 0.1 to V_CC x 0.9
10ns
V_CC x 0.5
Standard Output Load
Max
8
6
Units
pF
pF
Test Conditions
V_OUT = 0V
V_IN = 0V
Equivalent AC Output Load Circuit for V_CC = 5V
5.0V
SDA.
IRQ
1533Ω
For V_OL= 0.4V
and I_OL = 3 mA
100pF
Figure 14. Standard Output Load for testing the
device with V_CC = 5.0V
15