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MAX6955 Datasheet(Hoja de datos) 4 Page - Maxim Integrated Products

No. de Pieza. MAX6955
Descripción  2-Wire Interfaced, 2.7V to 5.5V LED Display Driver with I/O Expander and Key Scan
Descarga  39 Pages
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Fabricante  MAXIM [Maxim Integrated Products]
Página de inicio  http://www.maxim-ic.com
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 4 page
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2-Wire Interfaced, 2.7V to 5.5V LED Display
Driver with I/O Expander and Key Scan
4
_______________________________________________________________________________________
TIMING CHARACTERISTICS
(Typical Operating Circuit, V+ = 2.7V to 5.5V, TA = TMIN to TMAX, unless otherwise noted.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
TIMING CHARACTERISTICS
Serial Clock Frequency
fSCL
400
kHz
Bus Free Time Between a STOP
and a START Condition
tBUF
1.3
µs
Hold Time (Repeated) START
Condition
tHD, tSTA
0.6
µs
Repeated START Condition Setup
Time
tSU, tSTA
0.6
µs
STOP Condition Setup Time
tSU:STO
0.6
µs
Data Hold Time
tHD, tDAT
(Note 3)
0.9
µs
Data Setup Time
tSU, tDAT
100
ns
SCL Clock Low Period
tLOW
1.3
µs
SCL Clock High Period
tHIGH
0.6
µs
Rise Time of Both SDA and SCL
Signals, Receiving
tR
(Notes 2, 4)
20 +
0.1CB
300
ns
Fall Time of Both SDA and SCL
Signals, Receiving
tF
(Notes 2, 4)
20 +
0.1CB
300
ns
Fall Time of SDA Transmitting
tF, tX
(Notes 2, 5)
20 +
0.1CB
300
ns
Pulse Width of Spike Suppressed
tSP
(Notes 2, 6)
0
50
ns
Capacitive Load for Each
Bus Line
CB
(Note 2)
400
pF
Note 1: All parameters tested at TA = +25°C. Specifications over temperature are guaranteed by design.
Note 2: Guaranteed by design.
Note 3: A master device must provide a hold time of at least 300ns for the SDA signal (referred to VIL- of the SCL signal) in order to
bridge the undefined region of SCL’s falling edge.
Note 4: CB = total capacitance of one bus line in pF. tR and tF measured between 0.3V+ and 0.7V+.
Note 5: ISINK
≤ 6mA. CB = total capacitance of one bus line in pF. tR and tF measured between 0.3V+ and 0.7V+.
Note 6: Input filters on the SDA and SCL inputs suppress noise spikes less than 50ns.




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