hangzhou zhengxin micro-electronics co.,ltd address:b068#,4 floor, 639 dengyun road,hangzhou,zhejiang tel 0571-89908068 89908067 89908491 fax 0571-89908137 89908492 postcode 310014 website http://www.chiptrue.com 1 LX1527 user?s guide description LX1527 is designed by cmos technology,can storage isn and study code beforehand, it is decoded by software;isn has 20bit can storage 1048576 for combination,this can reduce any code collision. main features pin configuration 1 low power consumption quiescent current 1ua 2 operating voltage vcc=2.4 - 13.0v 3 . input four key-press through combination that can assemble 15 key-press mostly; 4 single oscillator circuit need one external resistor only. 5 .small volumne8 package by ssop it is upgrade product of lx2260 6 it is compatible with ev1527 rt1527 absolutely pin description sign description pin i / o osci oscillator circuitry input pin connect resistor to power supply 1 i vcc positive power supply 2 cnd negative power supply 3 txd code output pin 4 0 k0 key-press input pin contain pull-down resistor 5 i kl key-press input pin contain pull-down resistor 6 i k2 key-press input pin contain pull-down resistor 7 i k3 key-press input pin contain pull-down resistor 8 i osc1 1 vcc 2 vs s 3 txd 4 k0 5 k1 6 k2 7 k3 8 lx527/1527 free datasheet http://
hangzhou zhengxin micro-electronics co.,ltd address:b068#,4 floor, 639 dengyun road,hangzhou,zhejiang tel 0571-89908068 89908067 89908491 fax 0571-89908137 89908492 postcode 310014 website http://www.chiptrue.com 2 limit parameter sign parameter condition scope unit vcc supply voltage -0.3 15 v vi input voltage -0.3 vcc+ 0.3 v vo output voltage -0.3 vcc+ 0.3 v tst storage temperature -40 125 top operating temperature -20 70 pdis most power consumption vcc = 12v empty 24 mw electric characteristc parameter condition sign least type most unit operating voltage vcc 2.4 12 15 v quiescent current vcc = 12v osc stop output unloaded isb 1.0 ua operating current vcc = 12v one key-press input one contact vcc iop 0.5 1.0 ma driven pull current vcc = 12v,voh = 6v ioh 5 ma driven sink current vcc = 12v,vol = 6v iol 3 ma operating frequency fop 80k hz output code format complete format of 1 frame code synchronization code isn c0~c19 1 million group d0 d1 d2 d3 free datasheet http://
hangzhou zhengxin micro-electronics co.,ltd address:b068#,4 floor, 639 dengyun road,hangzhou,zhejiang tel 0571-89908068 89908067 89908491 fax 0571-89908137 89908492 postcode 310014 website http://www.chiptrue.com 3 synchronization code 4clk 124clk data 1 12clk 4clk data 0 4clk 12clk definition 1 clk=8 osc clock the oscillator resistor replace relation of LX1527 and ev1527(for reference only) ev1527 LX1527 430k 3.3m 330k 2.4m 300k 2.2m oscillator resistor and 1 bit data width td corresponding table 13v 12v 11v 10v 9v 8v 7v 6v 5v 4v 1m 605us 620us 640us 655us 675us 704us 736us 780us 844us 944us 1.2m 792us 814us 834us 854us 876us 91 4us 956us 1.015ms 1.09ms 1.225ms 1.5m 960us 980us 1.01ms 1.03ms 1.06ms 1.1ms 1.145ms 1.23ms 1.32ms 1.47ms 2m 1.22ms 1.25ms 1.28ms 1.31ms 1.35ms 1.39ms 1.46ms 1.54ms 1.65ms 1.85ms 2.2m 1.31ms 1.34ms 1.37ms 1.41ms 1.45ms 1.5ms 1.57ms 1.66ms 1.79ms 1.99ms 2.4m 1.43ms 1.48ms 1.51ms 1.55ms 1.59ms 1.64ms 1.71ms 1.81ms 1.94ms 2.19ms 2.7m 1.68ms 1.71ms 1.75ms 1.79ms 1.84ms 1.91ms 1.99ms 2.11ms 2.27ms 2.53ms 3m 1.79ms 1.82ms 1.86ms 1.91ms 1.96ms 2.03ms 2.11ms 2.24ms 2.401ms 2.69ms 3.3m 1.995ms 2.035ms 2.085ms 2.135ms 2.195ms 2.265ms 2.365ms 2.505ms 2.705ms 3.01ms free datasheet http://
hangzhou zhengxin micro-electronics co.,ltd address:b068#,4 floor, 639 dengyun road,hangzhou,zhejiang tel 0571-89908068 89908067 89908491 fax 0571-89908137 89908492 postcode 310014 website http://www.chiptrue.com 4 k0 k3 key-press combination and output relation table application circuitry diagram k3 k2 k1 ko d3 d2 d1 do o o o 1 o o o 1 o o 1 o o o 1 0 o o 1 1 o o 1 1 o 1 o o 0 1 o o o 1 o 1 0 1 o 1 o 1 1 o 0 1 1 0 o 1 1 1 0 1 1 1 1 0 0 0 1 0 0 0 1 0 0 1 1 0 0 1 1 0 1 0 1 0 1 0 1 0 1 1 1 0 1 1 1 1 0 0 1 1 0 0 1 1 0 1 1 1 0 1 1 1 1 0 1 1 1 0 1 1 1 1 1 1 1 1 free datasheet http://
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