M5481_04 Datasheet, PDF (1/10 Pages) STMicroelectronics – LED DISPLAY DRIVER

M5481
LED DISPLAY DRIVER
FEATURES SUMMARY
■ 2 DIGIT LED DRIVER (14 segments)
■ CURRENT GENERATOR OUTPUTS (no
registor required)
■ CONTINUOUS BRIGHTNESS CONTROL
■ SERIAL DATA INPUT
■ DATA ENABLE
■ WIDE SUPPLY VOLTAGE OPERATION
■ TLL COMPATIBILITY
■ APPLICATION EXAMPLES
■ MICROPROCESSOR DISPLAYS
■ INDUSTRIAL CONTROL INDICATOR
■ RELAY DRIVER
■ INSTRUMENTATION READOUTS
DESCRIPTION
The M5481 is a monolithic MOS integrated circuit
produced with a N-channel silicon gate technolo-
gy. It uses the M5450 die packaged in a 20-pin
plastic package copper frame, making it ideal for a
1-digit display. A single pin controls the LED dis-
play brightness by setting a reference current
through a variable resistor connected either to V_DD
or to a separate supply of 13.2V maximum.
The M5481 is a pin-to-pin replacement of the NS
MM 5481.
Figure 1. Package
PDIP20
(Plastic package)
Figure 2. Pin Connections
Output Bit 8
1
Output Bit 7
2
Output Bit 6
3
Output Bit 5
4
Output Bit 4
5
Output Bit 3
6
Output Bit 2
7
Output Bit 1
8
Brightness Control
9
V_DD
10
20 Output Bit 9
19 Output Bit 10
18 Output Bit 11
17 Output Bit 12
16 Output Bit 13
15 V_SS
14 Output Bit 14
13 Data Enable
12 Data In
11 Clock
April 2004
REV. 2
1/10