MAX6953EPL Ver la hoja de datos (PDF) - Maxim Integrated

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MAX6953EPL

2-Wire Interfaced, 2.7V to 5.5V, 4-Digit 5 ✕ 7 Matrix LED Display Driver

Maxim Integrated 

2-Wire Interfaced, 2.7V to 5.5V, 4-Digit 5 ✕ 7

Matrix LED Display Driver

MAX6953 TIMING CHARACTERISTICS (continued)

(V+ = 2.7V to 5.5V, TA = TMIN to TMAX, unless otherwise noted.) (Note 1)

PARAMETER

SYMBOL

CONDITIONS

MIN TYP MAX UNITS

Fall Time of SDA Transmitting

tF

(Notes 2, 5)

20 +

0.1CB

250

ns

Pulse Width of Spike Suppressed

tSP

(Note 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.

Typical Operating Characteristics

(Typical application circuit, V+ = 3.3V, LED forward voltage = 2.4V, scan limit set to 4 digits, TA = +25°C, unless otherwise noted.)

INTERNAL OSCILLATOR

FREQUENCY vs. TEMPERATURE

4.30

4.20

V+ = 2.7V

4.10

4.00

V+ = 5V

3.90

V+ = 3.3V

3.80

-40 -20 0 20 40 60 80

TEMPERATURE (°C)

INTERNAL OSCILLATOR FREQUENCY

vs. SUPPLY VOLTAGE

4.4

4.3

4.2

4.1

4.0

3.9

3.8

3.7

3.6

2.5

3.5

4.5

5.5

SUPPLY VOLTAGE (V)

INTERNAL OSCILLATOR

WAVEFORM AT OSC (PIN 19 OR 21)

2.5

2.0

1.5

1.0

0.5

0

0

200

400

600

800

TIMELINE (ns)

4 _______________________________________________________________________________________

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