HT1618 led driver www.artschip.com 1 description tm1618 is an led controller driven asic. 1 s egment/grid output lines, mcu digital interf ace, data latch, high-voltage led drive r, key scan circuit dare all incorporated into a single chip to build a highly reliable peripheral device for a single chip microc omputer. 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 fallin g edge of the shift clock (starting from the lower bit ) stb serial interface strobe this pin reads initialization serial dat a 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 pi ns 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 5v10% v ss logic ground connects the system ground www.datasheet.co.kr datasheet pdf - http://www..net/
HT1618 led driver www.artschip.com 2 absolute maximum ratings (ta=25 , vss=0v) parameter symbol ratings unit logic supply voltage vdd -0.5 ~+7.0 v logic input voltage vi1 -0.5 ~vdd+0.5 v segment driver output current io1 -50 ma grid driver output current io2 +200 ma power loss pd 400 mw supply temperature topt -40 ~+80 storage temperature tstg -65 ~+150 recommonded operating range (ta=-20 ~ +70 , vss=0v) parameter symbol min. typ max unit test condition logic supply voltage v dd 5 v - high-level input voltage v ih 0.7vdd - vdd v - low-level input voltage v il 0 - 0.3vdd v - electrical characteristics (ta=-20 ~+70 , vdd=4.5 ~5.5v, vss=0v) parameter symbol min. typ max. unit test condition ioh1 -20 -25 -40 ma seg1 ~ seg11, vo=vdd-2v high-level output current ioh2 -20 -30 -50 ma seg1 ~ seg11, vo=vdd-3v low-level output current iol1 80 140 - ma grid1 ~ grid6 vo=0.3v low-level output current idout 4 - - ma vo=0.4, dout high-level output current tolerance itolsg - - 5 % vo=vdd-3v, seg1 ~ seg11 output pull-down rl 10 k ? k1~k3 input current ii - - 1 a vi=vdd/vss high-level input voltage vih 0.7 vdd - v clk, din, stb low-level input voltage vil - - 0.3vdd v clk, din, stb lag voltage vh - 0.35 - v clk,din,stb dynamic current idddyn - - 5 ma display off, no-load www.datasheet.co.kr datasheet pdf - http://www..net/
HT1618 led driver www.artschip.com 3 swithcing characteristics (ta=-20 ~+70 , vdd=4.5 ~5.5v) parameter symbol min. typ max. unit test condition oscillation frequency fosc - 500 - khz r=16.5k ? tplz - - 300 ns propagation delay time tpzl - - 100 ns clk d out cl=15pf, rl=10k ? ttzh1 - - 2 s seg1~seg11 rise time ttzh2 - - 0.5 s cl=300pf grid1~grid4 seg12/grid7~seg14/grid5 fall time tthz - - 120 s cl=300pf, segn, gridn, maximal clock frequency fmax 1 - - mhz on 50% duty factor input capacitance ci - - 15 pf - *timing diagram (ta=-20 ~+70 , vdd=4.5 ~5.5v) parameter symbol min. typ max. unit test condition clock pulse wideth pwclk 400 - - ns - strobe pulse wideth pwstb 1 - - s - data setup time tsetup 100 - - ns - data hold time thold 100 - - ns - clk stb time tclk stb 1 - - s clk stb wait time twait 1 - - s clk clk www.datasheet.co.kr datasheet pdf - http://www..net/
HT1618 led driver www.artschip.com 4 timing faveform package: size lable min.(mm) max.(mm) size lable min. (mm) max.(mm) a1 21.9 22.10 c3 3.4 3.6 a1 1.40typ c4 1.58typ a2 0.43 0.57 d 8.10 8.60 a3 2.54typ d1 0.20 0.35 a4 0.59typ d2 7.62 7.87 a5 0.95typ 1 3.0typ b 6.3 6.5 ? 1 8 ? typ c1 3.4 3.6 ? 2 5 ? typ c2 0.6 0.8 www.datasheet.co.kr datasheet pdf - http://www..net/
HT1618 led driver www.artschip.com 5 .all specs and applications shown above subject to change without prior notice. www.datasheet.co.kr datasheet pdf - http://www..net/
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