HT6571 multiple rs-232 drivers and receivers pin assignment block diagram features single-chip with easy interface between uart and serial port connector three drivers and five receivers meet or exceed the requirements of eia/tia-232-d driver output slew rate limited to 30v/ m s max. driver current-limited output: 10ma typ. flexible supply voltage range esd protection exceeds 3kv general description the HT6571 is a cmos device containing three rs-232 line drivers, and five rs-232 line receiv- ers that are used to interface data terminal equipment (dte) with data circuit-terminating equipment (dce). 1 2nd aug 95
absolute maximum ratings electrical characteristics symbol paremeter test condition min. typ. max. unit v dd v cc condition v dd operation voltage 7.5 9 15 v v ss operation voltage C7.5 C9 C15 v v cc operation voltage 4.5 5 5.5 v v ih1 driver input high 12v 5v 2 v v il1 driver input low 12v 5v 0.8 v v ih2 receiver input high 12v 5v 3 v v il2 receiver input low 12v 5v 2 v i oh1 receiver output source current 12v 5v v o =2.4v C1 C2 C3 ma i ol1 receiver output sink current 12v 5v v o =0.4v +1 +2 +3 ma i os(h) high-level driver short current 12v 5v v o =0v C6 C10 C12 ma i os(l) low-level driver short current 12v 5v v o =0v 30 40 50 ma s r1 slew rate 12v 5v r l =7k w , c 1 =50pf 3v/ m s supply voltage (vss vdd) .............. C15v~15v supply voltage (gnd vcc) ........... C0.3v~5.5v input voltage driver .............................. 0v~7v receiver .................... C15v~15v output voltage driver ..................... C15v~15v receiver ....................... 0v~7v HT6571 2 2nd aug 95
application circuit vcc vcc 5 6 7 8 9 1 2 3 4 rp4 4.7k sd8 sd9 sd10 sd11 sd12 sd13 sd14 sd15 cts2z rts1z dtr1z txd1 sintr1 sintr2 sd7 sd6 sd5 sd4 sd3 sd2 sd1 sd0 1 3 5 2 4 6 8 7 10 12 14 16 18 20 22 24 26 28 30 32 34 9 11 13 15 17 19 21 23 25 27 29 31 33 36 38 40 35 37 39 hdd iderstz c2 1000p r7 220 vcc sd[0..15] sd[0..15] hirq 2 1 hdd led iowz iorz r6 330 hirq hcs0z sa1 sa0 iowz iorz d c d 2 z d s r 2 z c t s 2 z iocs16z hcs1z sa2 iocs16z dcd2z dsr2z hcs1z s d 7 s d 6 s d 5 s d 4 s d 3 s d 2 s d 1 s d 0 d t r 1 z r t s 1 z r x d 1 r i 1 z vcc t x d 1 ri1z rxd1 s i n t r 2 s i n t r 1 c6 .1u 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 print db25 ackz pe busy errorz pd7 pd6 dcd1z dsr1z cts1z vcc dcd1z dsr1z cts1z slct c15 .1u ri2z rts2z txd2 hcs0z dtr2z rxd2 sel bit6 bit7 ri2z 1 rxd2 2 rts2z 3 dtr2z 4 txd2 5 sel 6 bit6 7 bit7 8 hcs1z 9 hcs0z 10 bit4 11 bit5 12 vdd 13 clko 14 clki 15 gnd 16 fintr 17 drq 18 iderstz 19 pwrgd 20 reset 21 dackz 22 tc 23 timea 24 timeb 25 timec 26 timed 27 iorz 28 iowz 29 aen 30 s a 9 3 1 s a 8 3 2 s a 7 3 3 s a 6 3 4 s a 5 3 5 s a 4 3 6 s a 3 3 7 s a 2 3 8 s a 1 3 9 s a 0 4 0 r w c z 4 1 d s 1 z 4 2 d s 0 z 4 3 m o 1 z 4 4 m o 0 z 4 5 g n d 4 6 d i r z 4 7 s t e p z 4 8 h s z 4 9 w d z 5 0 wez 51 gnd 52 indexz 53 trk0z 54 wpz 55 rdz 56 dskchgz 57 strobez 58 slctinz 59 initz 60 autofdz 61 pintr 62 vdd 63 pd0 64 pd1 65 pd2 66 pd3 67 gnd 68 pd4 69 pd5 70 pd6 71 pd7 72 ackz 73 errorz 74 busy 75 pe 76 slct 77 cts1z 78 dsr1z 79 dcd1z 80 r i 1 z 8 1 r x d 1 z 8 2 s d 0 8 3 s d 1 8 4 s d 2 8 5 s d 3 8 6 v d d 8 7 s d 4 8 8 s d 5 8 9 s d 6 9 0 s d 7 9 1 g n d 9 2 r t s 1 z 9 3 d t r 1 z 9 4 t x d 1 9 5 s i n t r 1 9 6 s i n t r 2 9 7 c t s 2 z 9 8 d s r 2 z 9 9 d c d 2 z 1 0 0 u? ht-6550a /gamecsz /pdrq /pdackz ri2z rxd2 rts2z dtr2z txd2 bit6 bit7 sel hcs0z vcc irq6 drq2 reset dack2z tc c3 5p c4 5p c5 .1u timea bit4 bit5 x1 24m r5 200k irq6 drq2 reset dack2z tc timea iderstz bit4 bit5 ht-6550a/ht-6552 pd5 pd4 pd3 pd2 pd1 pd0 strobez irq7 irq7 autofdz initz slctinz c23 c24 c25 c26 c27 t r k 0 z w p z r d z d s k c h g z w e z vcc vcc vcc r1 2.2k 1 2 3 4 5 6 rp1 150 vcc s a 6 s a 5 s a 4 s a 3 s a 2 s a 1 s a 0 r w c z d s 1 z d s 0 z m o 1 z m o 0 z d i r z s t e p z h s z w d z indexz s a 9 s a 8 s a 7 iowz iorz aen timeb timec timed /sa10 /iordy iorz iowz aen timeb timec timed sa[0..9] sa[0..9] 135 2468 7 1 0 1 2 1 4 1 6 1 8 2 0 2 2 2 4 2 6 2 8 3 0 3 2 3 4 91 1 1 3 1 5 1 7 1 9 2 1 2 3 2 5 2 7 2 9 3 1 3 3 fdc mo0z 222x8 c20 c21 c22 HT6571 3 2nd aug 95
rts2z rts2z rp2a 1k rp3b 1k vcc sd[0..15] sd[0..15] 3 2 1 j1 [d] [c] c1 1 c2 2 c3 3 c4 4 c5 5 c6 6 c7 7 c8 8 c9 9 c10 10 c11 11 c12 12 c13 13 c14 14 c15 15 c16 16 c17 17 c18 18 d1 19 d2 20 d3 21 d4 22 d5 23 d6 24 d7 25 d8 26 d9 27 d10 28 d11 29 d12 30 d13 31 d14 32 d15 33 d16 34 d17 35 d18 36 j9 slot-36p iocs16z iocs16z rxd1 cts1z dsr1z dsr1z cts1z rxd1 vcc c16 .1u vdd 1 nrxd 2 nctsz 3 ndsrz 4 ntxd 5 ndtrz 6 ndcdz 7 nrtsz 8 nriz 9 vss 10 gnd 11 riz 12 rtsz 13 dcdz 14 dtrz 15 txd 16 dsrz 17 ctsz 18 rxd 19 vcc 20 u2 ht-6571 nrxd1 ncts1z ndsr1z nrxd1 ncts1z ndsr1z ntxd1 ndtr1z ndcd1z nri1z ntxd1 ndtr1z ndcd1z nri1z nrxd2 ncts2z nrxd2 ncts2z nrts1z nrts1z c17 .1u vdd 1 nrxd 2 nctsz 3 ndsrz 4 ntxd 5 ndtrz 6 ndcdz 7 nrtsz 8 nriz 9 vss 10 gnd 11 riz 12 rtsz 13 dcdz 14 dtrz 15 txd 16 dsrz 17 ctsz 18 rxd 19 vcc 20 u3 ht-6571 irq14 hirq txd1 dtr1z dcd1z ri1z ri1z dcd1z dtr1z txd1 rxd2 cts2z cts2z rxd2 rts1z rts1z vcc c1 1000p sd8 sd9 sd10 sd11 sd12 sd13 sd14 sd15 3 2 1 j2 3 2 1 j4 3 2 1 j3 dtr2z dtr2z hcs1z hcs1z r2 2.2k txd2 txd2 r3 4.7k rp3c 1k hcs0z rts1z rts1z rp2b 1k rp2c 1k mo0z mo0z hcs0z r4 4.7k sd7 sd6 sd5 sd4 sd3 sd2 sd1 sd0 aen aen 3 2 1 j7 3 2 1 j6 3 2 1 j5 chrdy [a] [b] reset drq2 -12v 12v a1 1 a2 2 a3 3 a4 4 a5 5 a6 6 a7 7 a8 8 a9 9 a10 10 a11 11 a12 12 a13 13 a14 14 a15 15 a16 16 a17 17 a18 18 a19 19 a20 20 a21 21 a22 22 a23 23 a24 24 a25 25 a26 26 a27 27 a28 28 a29 29 a30 30 a31 31 b1 32 b2 33 b3 34 b4 35 b5 36 b6 37 b7 38 b8 39 b9 40 b10 41 b11 42 b12 43 b13 44 b14 45 b15 46 b16 47 b17 48 b18 49 b19 50 b20 51 b21 52 b22 53 b23 54 b24 55 b25 56 b26 57 b27 58 b28 59 b29 60 b30 61 b31 62 j10 slot-62p chrdy drq2 12v reset dsr2z txd2 dtr2z dcd2z ri2z ri2z dcd2z dtr2z dsr2z c30 10u txd2 rts2z rts2z c19 .1u ndsr2z ntxd2 ndtr2z ndcd2z nri2z ndsr2z ntxd2 ndtr2z ndcd2z nri2z c18 .1u nrts2z nrts2z vcc c28 10u c29 10u nri1z ndtr1z ncts1z ntxd1 nrts1z nri1z ndtr1z ncts1z ntxd1 nrts1z irq7 irq6 iowz iorz 5 9 4 8 3 7 2 6 1 com1 sintr2 sintr1 dack3z drq3 dack1z drq1 iowz iorz irq7 irq6 sintr1 sintr2 sa10 dack3z drq3 dack1z drq1 sa9 sa8 sa7 sa6 3 2 1 j9 3 2 1 j8 3 2 1 j10 dtr1z txd1 dtr1z txd1 rp2d 1k sel rp3a 1k sel bit6 pdrq bit7 pdackz timec sa10 sa10 timec bit6 pdackz pdrq bit7 sa5 sa4 sa3 sa2 sa1 sa0 gbit6 gbit7 gtimec gtimec gbit7 gbit6 3 2 1 j11 3 2 1 j12 3 2 1 j13 dack2z tc bale sa[0..10] sa[0:10] dack2z tc bale ndcd2z nrts2z ndcd2z ntxd2 nrts2z ntxd2 1 3 5 2 4 6 8 7 10 9 com2 nrxd1 ndsr1z ndcd1z nrxd2 ndsr2z ncts2z ndtr2z nrxd1 ndsr1z ndcd1z nrxd2 ndtr2z ndsr2z ncts2z j1 j2 lpt port j3 ide port j4 game port 2-3 2-3 disable 1-2 2-3 prt1(3bc-3bfh) 2-3 1-2 prt2(378-37bh) 1-2 1-2 prt3(278-27bh) 1-2 primary port 2-3 secondary port j5 fdc port j6 ide port ht-6550a: j11-j14: 1-2 ht-6550a 1-2 enable 2-3 disable 1-2 enable 2-3 disable 1-2 enable 2-3 disable ht-6552: j11-j14: 2-3 ht-6552 nri2z nri2z vcc vcc 12345 rp5 4.7k 1 2 3 9 10 11 12 4 13 5 6 7 8 14 15 16 game bit4 bit5 bit4 bit5 gbit6 gbit7 gbit6 gbit7 gtimed gtimed 3 2 1 j14 3 2 1 j15 3 2 1 j16 dack3z drq3 drq3 dack3z timed iordy pdackz pdackz timed pdmarq pdmarq iordy drq1 dack1z rdq1 dack1z iordy pdrq chrdy chrdy vcc r8 10k r10 10k pdmarq pdmarq iordy pdrq vcc r9 10k r11 10k 3 2 1 j17 3 2 1 j18 timea timeb gtimec gtimed timea timeb rp6b 2.2k rp6c 2.2k rp6d 2.2k c14 .1u c13 .1u c12 .1u c11 .1u gtimec gtimed rp6a 2.2k j15-j16: 1-2 dma1 j15-j16: 2-3 dma3 1-2 1-2 com1 1-2 2-3 com2 2-3 1-2 com3 2-3 2-3 disable 1-2 1-2 com2 1-2 2-3 com1 2-3 1-2 com4 2-3 2-3 disable j7 j8 uart1 j9 j10 uart2 j7 j8 j9 uart1 uart2 2-3 2-3 2-3 disable disable 1-2 2-3 2-3 com1 disable 2-3 1-2 2-3 disable com2 1-2 1-2 2-3 com1 com2 2-3 2-3 1-2 com3 com4 1-2 2-3 1-2 disable com1 2-3 1-2 1-2 com2 disable 1-2 1-2 1-2 com2 com1 j10: 1-2 c7 .o1u j17 j18 lpt mode epp+ecp ecp epp spp 1-2 1-2 1-2 2-3 2-3 1-2 2-3 2-3 c8 .01u c9 .01u c10 .01u HT6571 4 2nd aug 95
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