Rainbow-electronics MAX6959 Manual do Utilizador descarregar pdf (Página 2)

MAX6958/MAX6959

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

9-Segment LED Display Drivers with Keyscan

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

DC ELECTRICAL CHARACTERISTICS

(V+ = 3V to 5.5V, T

= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at V+ = 5V, T

= +25°C.) (Note 1)

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional

operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to

absolute maximum rating conditions for extended periods may affect device reliability.

Voltage (with respect to GND)

V+, SCL, SDA .......................................................-0.3V to +6V

All Other Pins............................................-0.3V to (V+ + 0.3V)

Current

DIG0/SEG0–DIG3/SEG3 Sink Current ..........................275mA

DIG0/SEG0–SEG9 Source Current .................................30mA

SCL, SDA, INPUT1, INPUT2 ...........................................20mA

Continuous Power Dissipation (T

= +70°C)

16-Pin DIP (derate at 10.5mW/°C above +70°C).........842mW

16-Pin QSOP (derate at 8.34mW/°C above +70°C).....667mW

Operating Temperature Range

MAX695_ (T

MIN

to T

MAX

) ...............................-40°C to +125°C

Junction Temperature......................................................+150°C

Storage Temperature Range .............................-65°C to +150°C

Lead Temperature (soldering, 10s) .................................+300°C

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Operating Supply Voltage V+ 3 5.5 V

= +25°C2050

Shutdown Supply Current I

SHDN

Shutdown mode, all

digital inputs at V+

= T

MIN

to +85°C 125

µA

= +25°C 5.9 6.7

Operating Supply Current I+

Intensity set to full,

no display load

connected, INPUT1

and INPUT2 open

circuit

= T

MIN

to T

MAX

7.5

Display Scan Rate f

SCAN

4 digits scanned T

= T

MIN

to T

MAX

510 780 1050 Hz

Keyscan Debounce Time t

DEBOUNCE

= T

MIN

to T

MAX

30.3 41 63 ms

= +25°C -19 -23 -29

LED

= 2.4V,

V+ = 4.5V to 5.5V

= T

MIN

to T

MAX

-18 -30

= +25°C -16 -29.5

Segment Drive Source Current I

SEG

LED

= 2V,

V+ = 3V to 5.5V

= T

MIN

to T

MAX

-15.5 -30.5

Segment Current Slew Rate ∆I

SEG

/∆t 11 mA/µs

Segment Drive Current Matching ∆I

SEG

LOGIC INPUTS AND OUTPUTS

Input Leakage Current SCL

and SDA

, I

-1 +1 µA

Logic High Input Voltage SCL,

SDA

2.1 V

Logic Low Input Voltage SCL,

SDA

0.8 V

Input Leakage Current INPUT1,

INPUT2

INH

, I

INL

INPUT_ = V+ -1 +1 µA

Logic High Input Voltage INPUT1,

INPUT2

INH

0.7 ✕

V+

Logic Low Input Voltage INPUT1,

INPUT2

INL

0.3 ✕

V+

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

MAX6958/MAX6959 1

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