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PTC
PTC

PT6955 Datasheet

LED Driver IC


PT6955 Datasheet Preview


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Princeton Technology Corp.
LED Driver IC
Tel : 886-2-29162151
Fax: 886-2-29174598
URL: http://www.princeton.com.tw
PT6955
DESCRIPTION
PT6955 is an LED Controller driven on a 1/4 to 1/7 duty factor. Twelve/nine segment output lines, 4 to 7 grid
output lines, one display memory, control circuit are all incorporated into a single chip to build a highly reliable
peripheral device for a single chip microcomputer. Serial data is fed to PT6955 via a three-line serial interface.
Housed in a 24-pin SO Package, PT6955’s pin assignments and application circuit are optimized for easy PCB
Layout and cost saving advantages.
FEATURES
• CMOS Technology
• Low Power Consumption
• 8-Step Dimming Circuitry
• Serial Interface for Clock, Data Input, Strobe Pins
• Available in 24-pin, SO Package
APPLICATION
• Micro-computer Peripheral Device
PT6955 v1.2
Page 1
Updated December 2001
Page 1

Princeton Technology Corp.
LED Driver IC
PIN CONFIGURATION
Tel : 886-2-29162151
Fax: 886-2-29174598
URL: http://www.princeton.com.tw
PT6955
OSC
DIN
CLK
STB
VDD
SG1
SG2
SG3
SG4
SG5
SG6
SG7
GND
GR1
GR2
GR3
GR4
GND
VDD
SG12/GR5
SG11/GR6
SG10/GR7
SG9
SG8
PT6955 v1.2
Page 2
Updated December 2001
Page 2

Princeton Technology Corp.
LED Driver IC
Tel : 886-2-29162151
Fax: 886-2-29174598
URL: http://www.princeton.com.tw
PT6955
APPLICATION CIRCUIT
MCU
0.1µF
51K
OSC
DIN
GND
GR1
G1
CLK
GR2 G2
STB GR3 G3
+5V
VDD
GR4 G4
SG1
GND
+5V
S1 SG2
S2 SG3
VDD
SG12/GR5 S12
S3 SG4
SG11/GR6 S11
S4 SG5
SG10/GR7
S5 SG6
SG9 S9
S6 SG7
SG8 S8
S7
G1
G2
G3
DIGIT1
DIGIT2
G4
DIGIT3
DIGIT4
S1
S2
SEG1
SEG2
S3 SEG3
S4
S5
S6
SEG4
SEG5
SEG6
S7 SEG7
S8 SEG8
S9
S10
SEG9
SEG10
S12
SEG11
SEG12
Note: The capacitor (0.1uF) connected between the GND and VDD Pins must be located as near as possible
to the PT6959 chip.
PT6955 v1.2
Page 3
Updated December 2001
Page 3
Part Number PT6955
Manufactur PTC
Description LED Driver IC
Total Page 3 Pages
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