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X1228 Datasheet(PDF) 6 Page - Xicor Inc.

Part No. X1228
Description  Real Time Clock/Calendar/CPU Supervisor with EEPROM
Download  31 Pages
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Maker  XICOR [Xicor Inc.]
Homepage  http://www.xicor.com
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X1228 Datasheet(HTML) 6 Page - Xicor Inc.

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


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