Datasheet

2016 Microchip Technology Inc. DS20005651A-page 1
MM5450/51
Features
Continuous Brightness Control
Serial Data Input
No Load Signal Requirement
Enable (MM5450 Only)
Wide Power Supply Operation
TTL Compatibility
34 or 35 Outputs, 15 mA Capability
Alphanumeric Capability
Applications
Industrial Control Indicator
Relay Driver
Digital Clock, Thermometer, Counter, Voltmeter
Instrumentation Readouts
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.
Block Diagram
35 OUTPUT BUFFERS
35 LATCHES
35-BIT SHIFT
REGISTER
LOAD
RESET
RESET
(only available
in die form)
SERIAL DATA
22
CLOCK
21
DATA ENABLE/OUT 35
(See Note 1)
23
19
20 24
OUT 34
18
OUT 1
1
BRIGHTNESS
CONTROL
VDD
Note 1: Pin in Data Enable in MM5450
Pin in Output 25 in MM5451
LED Display Driver

Summary of content (20 pages)