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MAX6954 Datasheet(Hoja de datos) 4 Page - Maxim Integrated Products

No. de Pieza. MAX6954
Descripción  4-Wire Interfaced, 2.7V to 5.5V LED Display Driver with I/O Expander and Key Scan
Descarga  38 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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4-Wire Interfaced, 2.7V to 5.5V LED Display
Driver with I/O Expander and Key Scan
4
_______________________________________________________________________________________
Typical Operating Characteristics
(V+ = 3.3V, LED forward voltage = 2.4V, typical application circuit, TA = +25°C, unless otherwise noted.)
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
CLK Clock Period
tCP
38.4
ns
CLK Pulse Width High
tCH
16
ns
CLK Pulse Width Low
tCL
16
ns
CS Fall to CLK Rise Setup Time
tCSS
9.5
ns
CLK Rise to CS Rise Hold Time
tCSH
0ns
DIN Setup Time
tDS
9.5
ns
DIN Hold Time
tDH
0ns
V+ = 3.0V to 5.5V
19
Output Data Propagation Delay
tDO
V+ = 2.7V
25
ns
DOUT Output Rise and Fall Times
tFT
CLOAD = 10pF, V+ = 3.0V to 5.5V
10
Minimum CS Pulse High
tCSW
19.5
ns
Note 1: All parameters tested at TA = +25°C. Specifications over temperature are guaranteed by design.
INTERNAL OSCILLATOR FREQUENCY
vs. TEMPERATURE
TEMPERATURE (
°C)
110
80
50
20
-10
3.8
4.0
4.2
4.4
3.6
-40
RSET = 56kΩ
CSET = 22pF
INTERNAL OSCILLATOR FREQUENCY
vs. SUPPLY VOLTAGE
SUPPLY VOLTAGE (V)
5.0
4.5
4.0
3.5
3.0
3.8
4.2
4.4
3.6
2.5
5.5
RSET = 56kΩ
CSET = 22pF
4.0
100ns/div
OSC: 500mV/div
OSC_OUT: 2V/div
MAX6954 toc03
OSC
0V
0V
OSC_OUT
INTERNAL OSCILLATOR WAVEFORM
AT OSC AND OSC_OUT PINS
RSET = 56kΩ
CSET = 22pF




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