MM5450 Ver la hoja de datos (PDF) - Micrel

Número de pieza

componentes Descripción

Fabricante

MM5450

LED Display Driver

Micrel 

Micrel, Inc.

MM5450/5451

Absolute Maximum Ratings

Voltage (any pin) ........................................VSS to VSS + 12V

Power Dissipation

+25°C ........................................................................ 1W

+85°C.................................................................560mW

Junction Temperature (TJ) ....................................... +150°C

Storage Temperature (TS).........................–65°C to +150°C

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

Operating Ratings

Supply voltage (VDD – VSS).......................... +4.75V to +11V

Ambient Temperature Range (TA) ............. –40°C to +85°C

Electrical Characteristics

4.5V ≤ VDD ≤ 11V, VSS = 0V; TA = 25°C, bold values indicate –40°C ≤ TA ≤ +85°C, unless otherwise noted.

Symbol

Parameter

Condition

Min

Typ

Max

Power Supply Current

–25°C to +85°C, excluding output loads

8.5

–40°C to +85°C, excluding output loads

10

Data Input Voltage

VL

VH

logic-0 level, ±10 µA input bias

–0.3

0.8

logic-1 level, 4.75V ≤ VDD ≤ 5.25V

2.2

VDD

VDD > 5.25V

VDD –2

VDD

Brightness Control Input Current Note 2

0

0.75

Output Sink Current

segment off, VOUT = 3.0V

10

segment on, VOUT = 1.8V, Note 3

brightness input = 0µA

brightness input = 100µA

brightness input = 750µA

0

10

2.0

2.7

4

15

25

Brightness Control Input Voltage input current = 750 µA

3.0

4.3

Output Matching

Note 1

±20

fC

Clock Input Frequency

Notes 5, 6

tH

Clock Input High Time

Notes 5, 6

500

950

tL

Clock Input Low Time

Notes 5, 6

950

tDS

Data Input Setup Time

300

tDH

Data Input Hold Setup Time

300

tDES

Data Enable Input Setup Time

100

Reset Pad Current

die

8

8

Notes:

1. Output matching is calculated as the percent variation (IMAX + IMIN) / 2.

2. With a fixed resistor on the brightness input pin, some variation in brightness will occur among devices.

3. See Figures 7, 8 and 9 for recommended operating conditions and limits. Absolute maximum for each output should be limited to 40mA.

4. VOUT should be regulated by user. See Figures 8 and 9 for allowable VOUT vs. IOUT operation.

5. AC input waveform specification for test purpose: tR ≤ 200ns, tF ≤ 20ns, f = 500kHz, 50% ±10% duty cycle.

6. Clock input rise and fall times must not exceed 300ns.

Units

mA

mA

V

V

V

mA

µA

µA

mA

mA

V

%

kHz

ns

ns

ns

ns

ns

µA

February 2006

4

M9999-021606

(408) 955-1690

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