MAX6953_V01 datasheet(4/23 Pages) MAXIM

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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.)

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

(Notes 2, 5)

20 +

0.1CB

250

Pulse Width of Spike Suppressed

tSP

(Note 6)

Capacitive Load for Each

Bus Line

(Note 2)

400

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.

3.80

3.90

4.10

4.00

4.20

4.30

-40

-20

INTERNAL OSCILLATOR

FREQUENCY vs. TEMPERATURE

TEMPERATURE (°C)

V+ = 3.3V

V+ = 2.7V

V+ = 5V

INTERNAL OSCILLATOR FREQUENCY

vs. SUPPLY VOLTAGE

SUPPLY VOLTAGE (V)

4.5

3.5

3.7

3.8

3.9

4.0

4.1

4.2

4.3

4.4

3.6

2.5

5.5

0.5

1.5

1.0

2.0

2.5

400

200

600

800

INTERNAL OSCILLATOR

WAVEFORM AT OSC (PIN 19 OR 21)

TIMELINE (ns)

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