HT1618
LED Driver
www.artschip.com
1
DESCRIPTION
TM1618 is an LED Controller driven ASIC. 1 segment/grid output lines, MCU digital interface, data latch, High-voltage LED driver,
key scan circuit dare all incorporated into a single chip to build a highly reliable peripheral device for a single chip microcomputer.
Housed in a 18-pin DIP Package, TM1618 pin assignments and application circuit are optimized for easy PCB Layout and cost
saving advantages.
FEATURES
z CMOS Technology
z Display Modes (5segment, 7 grid to 8segment, 4grid)
z Key Scanning (5 x 1Bit)
z 8-Step Dimming Circuitry
z Serial Interface (CLK, STB, DIN, DOUT)
z Oscillatory Manners; RC Oscillation (450KHz ±5%)
z Built-in on-reset circuit
z Available in 18-pin, DIP Package
APPLICATION
z Micro-computer Peripheral Device
z VCR/VCD/DVD set
z Combi set
PIN CONFIGURATION:
TM1618
PIN DESCRIPTION
Pin Name Description Explanation
DIO Data Input/Output This pin inputs serial data at the rising edge of the shift clock (starting from
the lower bit)
This pin outputs serial data at the falling edge of the shift clock (starting from
the lower bit )
STB Serial Interface
Strobe
This pin reads initialization serial data at the rising/falling edge of the shift
clock then wait for the command.
The data input after the STB has fallen is processed as a command. When
this pin is “HIGH”, CLK is ignored
CLK Clock Input Pin This pin reads serial data at the rising edge and outputs data at the falling
edge.
NC NC No Connect
K2 Key Data Input Pins The data sent to these pins are latched at the end of the display cycle.
(Internal Pull-Low Resistor)
Seg1/KS1~Seg5/KS5 Output Segment Segment Output Pins (p-channel, open drain) Also acts as the key source
Grid1 ~ Grid2 Grid Output Pins Grid Output Pins (N-Channel, open drain)
Grid3~Grid4 Grid Output Pins Grid Output Pins (N-Channel, open drain)
Seg12/Grid7~Seg14/Grid5 Output (Seg/Grid) Seg/Grid Multiplexing output
V
DD
Logic Power 5V±10%
V
SS
Logic Ground Connects the system ground
Datasheet pdf - http://www.DataSheet4U.net/
评论2