X1227 Xicor, X1227 Datasheet - Page 18

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

X1227
AC Specifications (T
Notes: (1) This parameter is not 100% tested.
TIMING DIAGRAMS
Bus Timing
REV 1.1.20 1/13/03
SCL
SDA IN
SDA OUT
Symbol
t
t
t
t
t
HD:STA
SU:DAT
HD:DAT
SU:STO
SU:STA
t
(2) Cb = total capacitance of one bus line in pF.
t
f
t
HIGH
LOW
t
SCL
t
BUF
Cb
t
DH
t
AA
t
IN
R
F
t
SU:STA
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
A
= -40°C to +85°C, VCC = +2.7V to +5.5V, unless otherwise specified.)
t
HD:STA
t
F
t
SU:DAT
t
HIGH
Parameter
www.xicor.com
t
LOW
t
HD:DAT
t
R
t
AA
Characteristics subject to change without notice.
t
DH
20 +.1Cb
20 +.1Cb
Min.
50
100
0.1
1.3
1.3
0.6
0.6
0.6
0.6
50
0
t
(1)
BUF
(2)
(2)
t
SU:STO
Max. Units
400
300
300
400
0.9
18 of 28
kHz
pF
ns
µs
µs
µs
µs
µs
µs
ns
µs
µs
ns
ns
ns