X1240 Datasheet, PDF (15/19 Pages) Xicor Inc. – Real Time Clock/Calendar with EEPROM

X1240
AC SPECIFICATIONS (T_A = -40˚C to +85˚C, V_CC = +2.7V to +3.6V, 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
0
50
0.1
1.3
1.3
0.6
0.6
0.6
100
0
0.6
50
20 +.1Cb⁽³⁾
20 +.1Cb⁽³⁾
Max
400
0.9
300
300
400
Notes: (1) Typical values are for T_A = 25˚C and V_CC = 5.0V
(2) This parameter is periodically sampled and not 100% tested.
(3) Cb = total capacitance of one bus line in pF.
Units
KHz
nS
µS
µS
µS
µS
µS
µS
nS
µS
µS
nS
nS
nS
pF
TIMING DIAGRAMS
Bus Timing
SCL
t_SU:STA
SDA IN
SDA OUT
t_F
t_HIGH t_LOW
t_R
t_SU:DAT
t_HD:STA
t_HD:DAT
t_AA t_DH
t_SU:STO
t_BUF
15