Rainbow-electronics MAX6959 Manual do Utilizador descarregar pdf (Página 4)

MAX6958/MAX6959

2-Wire Interfaced, 3V to 5.5V, 4-Digit,

9-Segment LED Display Drivers with Keyscan

4 _______________________________________________________________________________________

Typical Operating Characteristics

(V+ = 5V, LED forward voltage = 2.4V, T

= +25°C, unless otherwise noted.)

SCAN RATE (f

SCAN

)

vs. TEMPERATURE

MAX6958/59 toc01

TEMPERATURE (°C)

SCAN RATE (Hz)

1008040 600 20-20

760

765

770

775

780

785

790

795

800

755

-40 120

5.5V

4.5V

KEYSCAN DEBOUNCE TIME (t

DEBOUNCE

)

vs. TEMPERATURE

MAX6958/59 toc02

TEMPERATURE (°C)

KEYSCAN DEBOUNCE TIME (ms)

100806040200-20

40.5

41.0

41.5

42.0

42.5

40.0

-40 120

4.5V

5.5V

SCAN RATE (f

SCAN

)

vs. SUPPLY VOLTAGE

MAX6958/59 toc03

SUPPLY VOLTAGE (V)

SCAN RATE (Hz)

5.04.54.03.5

765

770

775

780

785

790

760

3.0 5.5

KEYSCAN DEBOUNCE TIME (t

DEBOUNCE

)

vs. SUPPLY VOLTAGE

MAX6958/59 toc04

SUPPLY VOLTAGE (V)

KEYSCAN DEBOUNCE TIME (ms)

5.04.54.03.5

40.6

40.8

41.0

41.2

41.4

41.6

41.8

42.0

42.2

40.4

3.0 5.5

SEGMENT SOURCE CURRENT

vs. SUPPLY VOLTAGE

MAX6958/59 toc05

SUPPLY VOLTAGE (V)

SEGMENT SOURCE CURRENT (mA)

5.255.004.75

4.50 5.50

LED

= 2.4V

SEGMENT SOURCE CURRENT

vs. SUPPLY VOLTAGE

MAX6958/59 toc06

SUPPLY VOLTAGE (V)

SEGMENT SOURCE CURRENT (mA)

4.54.03.5

3.0 5.0 5.5

LED

= 2V

WAVEFORM AT DIG0/SEG0,

FULL INTENSITY

MAX6958/59 toc07

DIG0

SEG0

1V/div

200µs/div

INPUT PULLUP CURRENT

vs. TEMPERATURE

MAX6958/59 toc08

TEMPERATURE (°C)

INPUT PULLUP CURRENT (µA)

1008040 600 20-20

-40 120

5.5V

4.5V

1 2 3 4 5 6 7 8 9 ... 18 19

MAX6958/MAX6959 1

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