X1228 Datasheet, PDF (6/31 Pages) Xicor Inc. – Real Time Clock/Calendar/CPU Supervisor with EEPROM

X1228
AC Specifications (T_A = -40°C to +85°C, VCC = +2.7V to +5.5V, unless otherwise specified.)
Symbol
f_SCL
t_IN
t_AA
t_BUF
t_LOW
t_HIGH
t_SU:STA
t_HD:STA
t_SU:DAT
t_HD:DAT
t_SU:STO
t_DH
t_R
t_F
Cb
Parameter
SCL Clock Frequency
Pulse width Suppression Time at inputs
SCL LOW to SDA Data Out Valid
Time the bus must be free before a new transmission can start
Clock LOW Time
Clock HIGH Time
Start Condition Setup Time
Start Condition Hold Time
Data In Setup Time
Data In Hold Time
Stop Condition Setup Time
Data Output Hold Time
SDA and SCL Rise Time
SDA and SCL Fall Time
Capacitive load for each bus line
Min.
50⁽¹⁾
0.1
1.3
1.3
0.6
0.6
0.6
100
0
0.6
50
20 +.1Cb⁽²⁾
20 +.1Cb⁽²⁾
Notes: (1) This parameter is not 100% tested.
(2) Cb = total capacitance of one bus line in pF.
Max. Units
400 kHz
ns
0.9 µs
µs
µs
µs
µs
µs
ns
µs
µs
ns
300 ns
300 ns
400 pF
TIMING DIAGRAMS
Bus Timing
SCL
t_SU:STA
SDA IN
SDA OUT
t_F
t_HIGH
t_SU:DAT
t_HD:STA
t_LOW
t_HD:DAT
t_R
t_AA t_DH
t_SU:STO
t_BUF
REV 1.3 3/24/04
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Characteristics subject to change without notice. 6 of 31