X1227 Xicor, X1227 Datasheet - Page 17

• Manufacturer Part Number: X1227
• Description: Real Time Clock/Calendar/CPU Supervisor with EEPROM
• Manufacturer: Xicor

X1227
Notes: (1) The device enters the Active state after any start, and remains active: for 9 clock cycles if the Device Select Bits in the Slave
Capacitance T
Notes: (1) This parameter is not 100% tested.
AC CHARACTERISTICS
AC Test Conditions
Figure 18. Standard Output Load for testing the device with V
REV 1.1.20 1/13/03
Input Pulse Levels
Input Rise and Fall Times
Input and Output Timing
Levels
Output Load
Symbol
C
C
OUT
IN
(2) The device enters the Program state 200nS after a stop ending a write operation and continues for t
(3) The device goes into the Timekeeping state 200nS after any stop, except those that initiate a nonvolatile write cycle; t
(4) For reference only and not tested.
(5) V
(6) V
(7) V
(8) V
(9) V
(10) V
(11) I
(12) I
(13) Threshold voltages based on the higher of Vcc or Vback.
(14) Using recommended crystal and oscillator network applied to X1 and X2 (25°C).
(15) Typical values are for T
(2) The input capacitance between x1 and x2 pins can be varied between 5pF and 19.75pF by using analog trimming registers
(1)
(1)
stop that initiates a nonvolatile write cycle; or 9 clock cycles after any start that is not followed by the correct Device Select Bits in
the Slave Address Byte.
Address Byte are incorrect or until 200nS after a stop ending a read or write operation.
OL
OH
IL
CC
BACK
SDA
SDA
SDA
= V
= 3.0mA at 5.5V, 1.5mA at 2.7V
= -1.0mA at 5.5V, -0.4mA at 2.7V
Output Capacitance (SDA, RESET)
Input Capacitance (SCL)
= 0V
= V
=V
= GND or V
A
CC
= 0V
= 25°C, f = 1.0 MHz, V
SCL
SCL
x 0.1, V
=V
=V
BACK
CC
CC
IH
, Others = GND or V
, V
= V
, Others = GND or V
A
SCL
CC
= 25°C
= GND or V
x 0.9, f
Parameter
V
10ns
V
Standard Output Load
Equivalent AC Output Load Circuit for V
CC
CC
SCL
x 0.1 to V
x 0.5
SDA
CC
= 400KHz
CC
CC
BACK
, V
= 5V
RESET
CC
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x 0.9
= GND or V
5.0V
1533Ω
100pF
CC
Max.
For V
and I
CC
10
10
OL
= 5.0V
OL
= 0.4V
= 3 mA
CC
Characteristics subject to change without notice.
Units
= 5V
pF
pF
WC
.
Test Conditions
V
V
OUT
IN
= 0V
= 0V
WC
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