features 1500ps max. clock to bus (data transmit) 1000ps max. clock to q (data receive) extended 100e v ee range of ?.2v to ?.5v 25 ? cutoff bus outputs 50 ? receiver outputs scannable implementation of e336 synchronous and asynchronous bus enables non-inverting data path bus outputs feature internal edge slow-down capacitors additional package ground pins fully compatible with industry standard 10kh, 100k ecl levels internal 75k ? input pulldown resistors fully compatible with motorola mc10e/100e337 available in 28-pin plcc package 3-bit scannable registered bus transceiver description the sy10/100e337 are 3-bit registered bus transceivers with scan designed for use in new, high- performance ecl systems. the bus outputs (bus 0 ?us 2 ) are designed to drive a 25 ? bus; the receive outputs (q 0 ? 2 ) are designed for 50 ? . the bus outputs feature a normal logic high level (v oh ) and a cutoff low level of ?.0v and the output emitter-follower is ?ff? presenting a high impedance to the bus. the bus outputs also feature edge slow-down capacitors. both drive and receive sides feature the same logic, including a loopback path to hold data. the load/hold function is controlled by transmit enable (ten) and receive enable (ren) on the transmit and receive sides, respectively, with a high selecting load. the implementation of the e337 receive enable differs from that of the e336. a synchronous bus enable (sbusen) is provided for normal, non-scan operation. the asynchronous bus disable (abusdis) disables the bus for scan mode. the syncen input allows either synchronous or asynchronous re-enabling after disabling with abusdis. an alternative use is asynchronous-only operation with abusdis, in which case syncen is tied low. syncen is implemented as an overriding set control to the enable flip-flop. scan mode is selected by a logic high at the scan input. scan input data is shifted in through s-in, and output data appears at the q 2 output. all registers are clocked on the rising edge of clk. additional lead-frame grounding is provided through the ground pins (gnd) which should be connected to 0v. the gnd pins are not electrically connected to the chip. sy10e337 sy100e337 final rev.: c amendment: /2 issue date: february, 1998 pin function a 0 ? 2 data inputs a b 0 ? 2 data inputs b s-in serial (scan) data input ten, ren load/hold controls scan scan control abusdis asynchronous bus disable sbusen synchronous bus enable syncen synchronous enable control clk clock bus 0 ?us 2 25 ? cutoff bus outputs q 0 ? 2 receive data outputs (q 2 serves as scan_out in scan mode) v cco v cc to output pin names pin configuration top view plcc j28-1 26 27 28 1 2 3 4 18 17 16 15 14 13 12 25 24 23 22 21 20 19 5 6 7 8 9 10 11 v cc gnd bus 0 gnd q 1 bus 1 v cco v ee a 1 ten clk ren scan s-in b 2 v cco q 2 a 2 b 1 bus 2 gnd v cco a 0 b 0 sbusen q 0 syncen abusdis 1
2 sy10e337 sy100e337 micrel block diagram d q q 2 bus 2 q 1 bus 1 q 0 bus 0 a 2 b 2 s-in a 1 b 1 a0 b0 ten ren scan abusdis sbusen syncen clk scan-out d q d q d q set d q d q d q
3 sy10e337 sy100e337 micrel dc electrical characteristics v ee = v ee (min.) to v ee (max.); v cc = v cco = gnd t a = 0 ct a = +25 ct a = +85 c symbol parameter min. typ. max. min. typ. max. min. typ. max. unit condition v cut cut-off output voltage 2.10 2.03 2.10 2.03 2.10 2.03 v 1 i ih input high current 150 150 150 a all other inputs i ee power supply current ma 10e 145 174 145 174 145 174 100e 145 174 125 174 167 200 note: 1. applies to bus outputs only. measured with v tt = 2.10v. ac electrical characteristics v ee = v ee (min.) to v ee (max.); v cc = v cco = gnd t a = 0 ct a = +25 ct a = +85 c symbol parameter min. typ. max. min. typ. max. min. typ. max. unit condition t plh propagation delay to output ps t phl clk to q 450 1000 450 1000 450 1000 clk to bus 800 1800 800 1800 800 1800 abusdis 500 1500 500 1500 500 1500 syncen 800 1800 800 1800 800 1800 t s set-up time ps bus 350 350 350 sbusen 100 100 100 data, s-in 400 400 400 ten, ren, scan 550 550 550 t h hold time ps bus 350 350 350 sbusen 500 500 500 data, s-in 350 350 350 ten, ren, scan 200 200 200 t pw minimum pulse width 400 400 400 ps t r rise/fall time ps t f 20% to 80% (q n )300 800 300 800 300 800 20% to 80% (bus n rise) 500 1000 500 1000 500 1000 20% to 80% (bus n fall) 300 800 300 800 300 800 product ordering code ordering package operating code type range sy10e337jc j28-1 commercial sy10e337jctr j28-1 commercial sy100e337jc j28-1 commercial sy100e337jctr j28-1 commercial
4 sy10e337 sy100e337 micrel 28 lead plcc (j28-1) rev. 03 micrel-synergy 3250 scott boulevard santa clara ca 95054 usa tel + 1 (408) 980-9191 fax + 1 (408) 914-7878 web http://www.micrel.com this information is believed to be accurate and reliable, however no responsibility is assumed by micrel for its use nor for an y infringement of patents or other rights of third parties resulting from its use. no license is granted by implication or otherwise under any patent or pat ent right of micrel inc. ? 2000 micrel incorporated
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