MM5450BN Micrel Inc, MM5450BN Datasheet

LED Driver IC

MM5450BN

Manufacturer Part Number
MM5450BN
Description
LED Driver IC
Manufacturer
Micrel Inc
Datasheet

Specifications of MM5450BN

Output Current
2.7mA
Operating Temperature Range
-40°C To +85°C
Driver Case Style
DIP
Device Type
LED
No. Of Pins
40
Mounting Type
Through Hole
Supply Voltage Min
4.75V
Output Current Max
25mA
No. Of Segments
7
Display Type
LED
Interface
Serial
Current - Supply
10mA
Voltage - Supply
4.75 V ~ 11 V
Operating Temperature
-40°C ~ 85°C
Package / Case
40-DIP (0.600", 15.24mm)
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Configuration
-
Digits Or Characters
-
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant, Contains lead / RoHS non-compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
MM5450BN
Manufacturer:
NSC
Quantity:
1 235
Part Number:
MM5450BN
Manufacturer:
NS
Quantity:
11 260
Part Number:
MM5450BN
Manufacturer:
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Quantity:
780
Part Number:
MM5450BN
Manufacturer:
MICROCH
Quantity:
20 000
General Description
The MM5450 and MM5451 LED display drivers are
monolithic MOS IC’s fabricated in an N-Channel, metal-
gate process. The technology produces low-threshold,
enhancement-mode, and ion-implanted depletion-mode
devices.
A single pin controls the LED display brightness by setting
a reference current through a variable resistor connected
to the supply.
Applications
• Industrial control indicator
• Relay driver
• Digital clock, thermometer, counter, voltmeter
• Instrumentation readouts
____________________________________________________________________________________________________________
Block Diagram
SuperSwitcher and Super ßeta PNP are trademarks of Micrel, Inc.
February 2006
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (
BRIGHTNESS
DATA ENABLE/OUT 35
CONTROL
SERIAL DATA
(See Note 1)
CLOCK
19
23
22
21
Note 1: Pin 23 is Data Enable in MM5450
Pin 23 is Output 35 in MM5451
VDD
20
Figure 1.
OUT 34
35 OUTPUT BUFFERS
24
35-BIT SHIFT
35 LATCHES
REGISTER
Features
• Continuous brightness control
• Serial data input
• No load signal requirement
• Enable (on MM5450)
• Wide power supply operation
• TTL compatibility
• 34 or 35 outputs, 15mA capability
• Alphanumeric capability
Ordering Information
Standard
MM5450BN
MM5451BN
MM5450BV
MM5451BV
408
) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
Part Number
OUT 1
18
RESET
Pb-Free
MM5450YN
MM5451YN
MM5450YV
MM5451YV
LOAD
LED Display Driver
MM5450/5451
1
–40°C to+85°C
–40°C to+85°C
–40°C to+85°C
–40°C to+85°C
Temp. Range
RESET
(only available
in die form)
Junction
(408) 955-1690
M9999-021606
40-pin PDIP
40-pin PDIP
44-pin PLCC
44-pin PLCC
Package

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MM5450BN Summary of contents

Page 1

... Continuous brightness control • Serial data input • No load signal requirement • Enable (on MM5450) • Wide power supply operation • TTL compatibility • outputs, 15mA capability • Alphanumeric capability Ordering Information Part Number Standard MM5450BN MM5451BN MM5450BV MM5451BV OUT 34 OUT 1 VDD OUTPUT BUFFERS ...

Page 2

... OUTPUT BIT 15 4 OUTPUT BIT 14 5 OUTPUT BIT 13 6 OUTPUT BIT 12 7 OUTPUT BIT 11 8 OUTPUT BIT 10 9 OUTPUT BIT 9 10 MM5450BN/YN OUTPUT BIT 8 11 OUTPUT BIT 7 12 OUTPUT BIT 6 13 OUTPUT BIT 5 14 OUTPUT BIT 4 15 OUTPUT BIT 3 16 OUTPUT BIT 2 ...

Page 3

Micrel, Inc. Connection Diagram: Plastic Leaded Chip Carrier February 2006 OUTPUT BIT 13 7 OUTPUT BIT 12 8 OUTPUT BIT 11 9 OUTPUT BIT 10 10 OUTPUT BIT ...

Page 4

Micrel, Inc. Absolute Maximum Ratings Voltage (any pin) ........................................V Power Dissipation +25°C........................................................................1W +85°C.................................................................560mW Junction Temperature (T ) ....................................... +150°C J Storage Temperature (T ).........................–65°C to +150°C S Lead Temperature (soldering, 10sec.) ..................... +300°C Electrical Characteristics 4.5V ≤ V ≤ 11V, ...

Page 5

Micrel, Inc. Functional Description The MM5450 and MM5451 were designed to drive either 4- or 5-digit alphanumeric LED displays with the added benefit of requiring minimal interface with the display or data source. Data is transferred serially via 2 signals; ...

Page 6

Micrel, Inc. February 2006 Figure 5. Figure 6. Input Data Format 6 MM5450/5451 M9999-021606 (408) 955-1690 ...

Page 7

Micrel, Inc. Typical Performance Characteristics Figure 7. Typical Applications 7V RAW DC LM317 > 240 – 5k LM324 + Figure 10. Typical Application of Constant Current Brightness Control February 2006 Figure ...

Page 8

Micrel, Inc. Typical Applications 3.0V LED DATA IN February 2006 LED DISPLAY MM5450 DISPLAY DRIVER ...

Page 9

Micrel, Inc. Package Information MICREL, INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA TEL +1 (408) 944-0800 FAX +1 (408) 474-1000 WEB http:/www.micrel.com The information furnished by Micrel in this data sheet is believed to be accurate and reliable. ...

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