1 * this specification are subject to be changed without notice. em92600/1c dual pll for 45/48 mhz cordless phone 4.23.1995 em92600/1c dual pll for 45/48 mhz cordless phone general description the em92600/1c series are developed for 45/48 mhz of 10 channels band frequency of cordless telephone which is used in mainland china. these devices are dual phase-locked loop frequency synthesizers contained rom counters for receive and transmit loops with two independent phase detect circuits. a common reference oscillator and reference divider are share by the receive and transmit circuits. other features include a lock detect circuit for the transmit loop, illegal code default, a buffered oscillator output for mixing purposes in the system, 5khz tone output . the em92601c is designed for easy mpu interface. it provides the same features as the EM92600C , but accepts channel programming via a clocked, serial input instead of parallel bcd inputs. the EM92600C is selected channels via machanical switches of parallel bcd input. features ? include oscillation circuit with external x-tal (10.240 mhz). ? unlock detector. ? 5khz output for guard tone. ? standby mode for power saving. ? 2.5 to 5.5v supply range. ? baseset/handset changeable. ? available in 16 pin dip or sop. ? series part number package channel selection EM92600Cp dip parallel EM92600Cm sop parallel em92601cp dip serial em92601cm sop serial pin assignments EM92600C em92601c xtalo mode sb 5k d0 d1 d2 d3 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 xtali v dd rif pdr v ss pdt ld tif xtalo mode sb 5k di clk nc en 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 xtali v dd rif pdr v ss pdt ld tif
* this specification are subject to be changed without notice. em92600/1c dual pll for 45/48 mhz cordless phone 2 4.23.1995 pin descriptions symbol pin no. function xtalo o this ouput generates reference frequency when it is connected to pin 16 with external osc of which frequency is 10.240mhz mode i base/remote changing. internal pull down. v dd =base,v ss =remote. sb i the standby pin is uses to save power when no transmit. internal pull down. high: transmit and receive active low: receive acts only 5k o the signal derived from the reference oscillator. 5khz output. functional block diagram EM92600C block diagram em92601c block diagram xtal0 v dd v ss 5k pdr rif v dd reference counter divide by 2048 lock detector phase detector phase detector 14 bits divide by n receive counter b27-b14 mode d3 sb rom 32*28 & decoder logic 14 bits divide by n transmit counter v dd xtal1 ld pdt tif b13-b0 d2 d1 d0 xtal0 v dd v ss 5k pdr rif v dd reference counter divide by 2048 lock detector phase detector phase detector 14 bits divide by n receive counter b27-b14 mode di clk en sb rom 32*28 & decoder logic 14 bits divide by n transmit counter v dd xtal1 ld pdt tif b13-b0 4 bits latch 4 bits s/r
3 * this specification are subject to be changed without notice. em92600/1c dual pll for 45/48 mhz cordless phone 4.23.1995 absolute maximum ratings symbol rating value unit v dd dc supply voltage -0.5 to +6 v v in input voltage -0.5 to v dd +0.5 v i in ,i out dc current drain per pin 10.0 ma i dd ,i ss dc current drain v dd or v ss pins 30.0 ma t a operating temperature range -30 to +75 c t stg storage temperature range -65 to +150 c symbol i/o function d0 i the channel selected pin. lsb.(intenal pull down) d1 i the channel selected pin. (internal pull down) d2 i the channel selected pin. (internal pull down) d3 i the channel selected pin. msb.(internal pull down) di i the serial input data pin. clk i clock input. each low to high transition of the clock shifts one bit of data into the on-chip shift register. nc - not connect. en i the enable pin controls the data transfer from the shift register to the 4-bit latch. a low to high transition latches the data. tif i input to programmable divider of tx. ac coupling with vco. min input voltage is 200mvp-p. ld o unlock detector output. v dd level: unlock. pdt o phase detector output for tx. pdt detects the phase error from tx pll and its output is connected to external low pass filter. v ss - ground. pdr o phase detector output for rx. pdr detects the phase error from rx pll and its output is connected to external low pass filter. rif i input of programmable divider for rx.ac coupling with vco. min input voltage is 200mvp-p. v dd - power supply. xtal1 i to connect crystal ( 10.240mhz ) and capacitor.
* this specification are subject to be changed without notice. em92600/1c dual pll for 45/48 mhz cordless phone 4 4.23.1995 dc electrical characteristics (t a = 25 c unless otherwise noted ) parameter sym. min. typ. max. unit condition operating voltage v dd 2.5 - 5.5 v input voltage v il - 0.8 v v dd =3v v ih 2.2 - output voltage v ol - 0.05 v v dd =3v v oh 2.95 - input low current i il m av il =0 -36 - pin 16,14,9 -0.06 - pin 2~8 input high current i ih m av ih =v dd -0.5v - 36 pin 16,14,9 - 120 pin 2~8 output current i oh -0.2 - ma v oh =2.6v i ol 0.2 - v ol =0.4v standby current i ds - 1.5 ma v dd =3v, note1 operating current i do - 3.0 ma v dd =3v, note2 (0.2vp-p input at rif,tif) 3-state leakage current i oz - 1 m av dd =5v note 1: xtalin: 10.24mhz ; mode:v dd ; sb:v ss ; tif=20mhz(200 mvp-p); rif=40mhz(200 mvp-p); others are open. note 2: xtalin: 10.24mhz ; mode:v dd ; sb:v dd ; tif=20mhz(200 mvp-p); rif=40mhz(200 mvp-p); others are open. parameter sym. min. typ. max. unit condition output rise time t r 200 ns v dd =3v output fall time t f 200 ns v dd =3v input rise and fall time t r 5 m s xtal1 t f v dd =3v maximum frequency f max 12 xtal1 input =sine wave 0.2vp-p 50 mhz rif (v dd =3v) osc in 50 tif setup time data to clock t su em92601c only enable to clock 100 200 ns hold time t h 80 ns em92601c only clock to data recovery time t rec 80 ns em92601c only enable to clock input pulse width t w 80 ns em92601c only clock and enable ac electrical characteristics
5 * this specification are subject to be changed without notice. em92600/1c dual pll for 45/48 mhz cordless phone 4.23.1995 timing diagram em92601c timing 1.6? 6.4?.4ms pdt ld unlock timing 1 st clk trec tw previous data latched 4 th clk tsu 3 rd clk 2 nd clk 1 st clk tw tsu th d2 d1 d0 d3 data clock enable application circuit 0.455mhz 2nd if 1st if 2nd mix 1st mix bpf bpf tx vco lpf lpf rx vco 123 4 56 7 8 16 15 14 13 12 11 10 9 xtal0 mode sb 5k do/di d1/clk d2/nc d3/en xtal1 vdd rif pdr vss pdt ld tif 10.24 mhz 10.240 mhz
* this specification are subject to be changed without notice. em92600/1c dual pll for 45/48 mhz cordless phone 6 4.23.1995 divide ratio and vco frequencies base input rx (fref=5khz) tx=(fref=5khz) (mode=1) ch d3 d2 d1 d0 frx (mhz) fvco(mhz) n ftx(mhz) fvco(mhz) n 0 0 0 1 1 48.250 37.555 7511 45.250 45.250 9050 0 0 1 0 2 48.275 37.580 7516 45.275 45.275 9055 0 0 1 1 3 48.300 37.605 7521 45.300 45.300 9060 0 1 0 0 4 48.325 37.630 7526 45.325 45.325 9065 0 1 0 1 5 48.350 37.655 7531 45.350 45.350 9070 0 1 1 0 6 48.375 37.680 7536 45.375 45.375 9075 0 1 1 1 7 48.400 37.705 7541 45.400 45.400 9080 1 0 0 0 8 48.425 37.730 7546 45.425 45.425 9085 1 0 0 1 9 48.450 37.755 7551 45.450 45.450 9090 1 0 1 0 10 48.475 37.780 7556 45.475 45.475 9095 1 0 1 1 48.475 37.780 7556 45.475 45.475 9095 1 1 0 0 48.475 37.780 7556 45.475 45.475 9095 1 1 0 1 48.475 37.780 7556 45.475 45.475 9095 1 1 1 0 48.475 37.780 7556 45.475 45.475 9095 1 1 1 1 48.475 37.780 7556 45.475 45.475 9095 0 0 0 0 48.475 37.780 7556 45.475 45.475 9095 remote input rx (fref=5khz) tx=(fref=5khz) (mode=0) ch d3 d2 d1 d0 frx (mhz) fvco(mhz) n ftx(mhz) fvco(mhz) n 0 0 0 1 1 45.250 34.555 6911 48.250 48.250 9650 0 0 1 0 2 45.275 34.580 6916 48.275 48.275 9655 0 0 1 1 3 45.300 34.605 6921 48.300 48.300 9660 0 1 0 0 4 45.325 34.630 6926 48.325 48.325 9665 0 1 0 1 5 45.350 34.655 6931 48.350 48.350 9670 0 1 1 0 6 45.375 34.680 6936 48.375 48.375 9675 0 1 1 1 7 45.400 34.706 6941 48.400 48.400 9680 1 0 0 0 8 45.425 34.730 6946 48.425 48.425 9685 1 0 0 1 9 45.450 34.755 6951 48.450 48.450 9690 1 0 1 0 10 45.475 34.780 6956 48.475 48.475 9695 1 0 1 1 45.475 34.780 6956 48.475 48.475 9695 1 1 0 0 45.475 34.780 6956 48.475 48.475 9695 1 1 0 1 45.475 34.780 6956 48.475 48.475 9695 1 1 1 0 45.475 34.780 6956 48.475 48.475 9695 1 1 1 1 45.475 34.780 6956 48.475 48.475 9695 0 0 0 0 45.475 34.780 6956 48.475 48.475 9695
|
