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Part: LD1207
Category:
Timing Circuits
-> Clock Generators
Description: Led And Led Display Driver
Company: IK Semiconductor
Datasheet: Download LD1207 datasheet File size : 61 kB
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Datasheet text preview:
TECHNICAL DATA
DESCRIPTION
The LD1207 is specifically designed for LED and LED DISPLAY derivers. The LD1207 have 12/9 segment output lines, 7 to 4 grid output lines, one display memory, control circuit and 3 line serial data interface. This function are all incorporated into a single chip to build a highly reliable peripheral device for a single chip microcomputer. It is very convenience to control for numeric display. LD1207's pin assignments and application circuit are optimized for easy PCB Layout and cost saving advantages.
LD1207
FEATURES
· CMOS Technology · Segment output line selection by command : 12 ~ 9 · Grid output line selection by command : 7 ~ 4 · Operation voltage : 5V · Low Power Consumption · 8-Step Dimming control by command · Serial Interface for Clock, Data Input, Strobe Pins · 24-pin, SOP Package
APPLICATION
· Segment LED display : VCR, DVD, MWO
1
TECHNICAL DATA
BLOCK DIAGRAM
LD1207
SG1
Control
SG2 SG3 SG4 SG5
DIN CLK STB
Serial Data Interface
Display Memory
SG6 SG7
Segment Driver / Grid Driver
SG8 SG9 SG10/GR7 SG11/GR6 SG12/GR5 GR4 GR3 GR2 GR1
OSC R GND
OSC
Timing Generator
Dimming Circuit
VDD
GND
PIN CONFIGURATION
OSC DIN CLK STB VDD SG1 SG2 SG3 SG4 SG5 SG6 SG7 1 2 3 4 5 6 7 8 9 10 11 12 24 23 22 21 20 19 18 17 16 15 14 13 GND GR1 GR2 GR3 GR4 GND VDD SG12/GR5 SG11/GR6 SG10/GR7 SG9 SG8
2
TECHNICAL DATA
PIN DESCRIPTION
LD1207
Pin Name
I/O
Description Oscillator Input Pin. A resistor is connected to this pin and GND. Data Input Pin. This pin inputs serial data at the rising edge of the shift clock (staring from the lower bit) Clock Input Pin. Rising edge trigger. Strobe pin for Serial Interface. The data input after the STB has fallen is processed as a command. When this pin is "HIGH", CLK is ignored. Power Supply Segment Output Pins(p-channel, open drain) Segment Output Pin/ Grid Output Pin (CMOS Output) Ground Pin Grid Output Pins (n-channel, open drain)
Pin No.
OSC
I
1
DIN CLK
I I
2 3
STB
I
4
VDD SG1 to SG9 SG10/GR7 to SG12/GR5 GND GR4 to GR1
O O O
5,18 6~14 15~17 19,24 20~23
3
Others parts begin by ld
LD-1 LD-2 LD-3 LD-4 LD-5 LD-6 LD-7 LD-8 LD-9 LD-10
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