1 superlite sy55852u micrel, inc. m9999-060407 hbwhelp@micrel.com or (408) 955-1690 description 2.5ghz min. f max 2.3v to 5.7v power supply single bit register memory synchronizes 1 bit of data to a clock optimized to work with superlite family fully differential accepts cml, pecl, lvpecl input logic levels source terminated cml outputs for fast edge rates available in a tiny 10-pin msop the sy55852u is a flip-flop used to synchronize data to a clock. its differential output will reproduce and remember the value on its input at the rising edge of the clock. in addition, an asynchronous, level sensitive reset is provided. for a synchonous reset, the sy55851u anygate can be used. sy55852u inputs can be terminated with a single resistor between the true and complement pins of a given input. the sy55852u is a member of micrel's superlite family of high-speed cml logic. this family features very small packaging and 2.3v to 5.7v operation. features d flip-flop superlite sy55852u applications high-speed logic oc-48 communication systems functional block diagram rev.: f amendment: /0 issue date: june 2007 superlite is a trademark of micrel, inc. anygate is a registered trademark of micrel, inc. dq r clock reset data o u t superlite
2 superlite sy55852u micrel, inc. m9999-060407 hbwhelp@micrel.com or (408) 955-1690 package/ordering information d /d clk /clk gnd vcc /r r q /q 76 45 1 10 98 23 top view msop 10-pin msop (k10-1) pin number pin name pin function 1, 2 d, /d cml/pecl/lvpecl input (differential): this is the single bit of data that gets clocked in and remembered. 3, 4 clk, /clk cml/pecl/lvpecl input (differential): the rising edge of this signal is the clock signal that determines when the boolean value at the data input gets stored. 5 gnd ground. 6, 7 /q, q cml output (differential): this is the output of the flip-flop. 8, 9 r, /r cml/pecl/lvpecl input (differential): this is an asynchronous active high level reset, that forces the flip-flop into a known state, namely zero. 10 vcc power supply. pin description d clk r q /q xx1 0 1 x00q n-1 /q n-1 x10q n-1 /q n-1 0 00 1 1 01 0 truth table ordering information (1) package operating package lead part number type range marking finish sy55852ukc k10-1 commercial 55852u sn-pb sy55852ukctr (2) k10-1 commercial 55852u sn-pb sy55852uki k10-1 industrial 55852u sn-pb sy55852ukitr (2) k10-1 industrial 55852u sn-pb sy55852ukg (3) k10-1 industrial 55852u with nipdau pb-free bar line indicator pb-free sy55852ukgtr (2, 3) k10-1 industrial 55852u with nipdau pb-free bar line indicator pb-free notes: 1. contact factory for die availability. dice are guaranteed at t a = 25 c, dc electricals only. 2. tape and reel. 3. pb-free package recommended for new designs.
3 superlite sy55852u micrel, inc. m9999-060407 hbwhelp@micrel.com or (408) 955-1690 functional description v cc nc x /x figure 1. hard wiring a logic 1 (1) note 1. x is either d, clk, r input. /x is either /d, /clk, /r input. nc v cc > 3.0v nc x /x nc v cc 3.0v x /x v cc figure 2. hard wiring a logic 0 (1) establishing static logic inputs the true pin of an input pair is internally biased to ground through a 75k ? resistor. the complement pin of an input pair is internally biased halfway between v cc and ground by a voltage divider consisting of two 75k ? resistors. to keep an input at static logic zero at v cc > 3.0v, leave both inputs unconnected. for v cc 3.0v, connect the complement inputs to v cc and leave the true inputs unconnected. to make an input static logic one, connect the true input to v cc , leave the complement input unconnected. these are the only safe ways to cause inputs to be at a static value. in particular, no input pin should be directly connected to ground. all nc (no connect) pins should be unconnected.
4 superlite sy55852u micrel, inc. m9999-060407 hbwhelp@micrel.com or (408) 955-1690 absolute maximum ratings (1) supply voltage (v cc ) .................................. 0.5v to +6.0v cml output voltage .......................... v cc 1.0 to v cc +0.5 lead temperature (soldering, 20 sec.) ..................... 260 c storage temperature (t s ) ....................... 65 c to +150 c operating ratings (2) supply voltage (v in ) .............................. 0.5 to v cc +0.5v ambient temperature (t a ) ......................... 40 c to +85 c package thermal resistance msop ( ja ) still-air ........................................................... 113 c/w 500lpfm ............................................................ 96 c/w notes: 1. permanent device damage may occur if absolute maximum ratings are exceeded. this is a stress rating only and functional oper ation is not implied at conditions other than those detailed in the operational sections of this data sheet. exposure to absolute maximu m ratlng conditions for extended periods may affect device reliability. 2. the data sheet limits are not guaranteed if the device is operated beyond the operating ratings. v cc = +2.3v to +5.7v; gnd = 0v; t a = 40 c to +85 c; unless otherwise noted. symbol parameter condition min typ max units v cc power supply voltage 2.3 5.7 v i cc power supply current 36 ma note: 1. the device is guaranteed to meet the dc specifications, shown in the table above, after thermal equilibrium has been establishe d. the device is tested in a socket such that transverse airflow of >500lfpm is maintained. dc electrical characteristics (1) v cc = +2.3v to +5.7v; gnd = 0v; t a = 40 c to +85 c; unless otherwise noted. symbol parameter condition min typ max units v id differential input voltage 100 mv v ih input high voltage note 2 1.6 v cc v v il input low voltage note 2 1.5 v cc 0.1 v v oh output high voltage no load v cc 0.020 v cc 0.010 v cc v v ol output low voltage no load v cc 0.97 v cc 0.825 v cc 0.660 v v os output voltage swing no load, note 3 0.660 0.800 0.950 v 50 ? environment, note 4 0.200 v 100 ? environment, note 5 0.400 v r drive output source impedance 80 100 120 ? notes: 1. equilibrium temperature. 2. inputs must be biased to logic low or high when v cc is less than 3.0v. 3. actual voltage levels and differential swing will depend on customer termination scheme. typically, a 400mv swing is availabl e in the 100 ? environ- ment and a 200mv swing in the 50 ? environment. refer to the cml termination diagram for more details. 4. see figure 3a and 3b. 5. see figure 4. cml dc electrical characteristics (1)
5 superlite sy55852u micrel, inc. m9999-060407 hbwhelp@micrel.com or (408) 955-1690 timing diagrams clk data reset q 50% t h 50% t s t rr t pd 50% 50% t pd v cc = 2.3v to 5.7v; gnd = 0v; t a = 40 c to +85 c; unless noted. symbol parameter condition min typ max units f max max. operating frequency 2.5 ghz t pd propagation delay clk to q 400 ps r to q 500 t s set-up time 40 ps t h hold time 40 ps t rr reset recovery 400 ps t pw minimum pulse width clk to q v cc < 3v 160 ps v cc > 3v 140 r to q 250 t r ,t f cml output rise/fall times 35 150 ps (20% to 80%) note: 1. tested using environment of figure 3b, 50 ? load cml output. ac electrical characteristics (1)
6 superlite sy55852u micrel, inc. m9999-060407 hbwhelp@micrel.com or (408) 955-1690 cml termination 100 ? 100 ? 100 ? 100 ? sy55852u v cc v cc 100 ? 50 ? 50 ? 8ma figure 3a. differentially terminated (50 ? ? ? ? ? load cml output) all inputs accept the output from any other member of this family. all outputs are source terminated 100 ? cml differential drivers as shown in figures 3 and 4. sy55852u expects the inputs to be terminated, and that good high speed design practices be adhered to. sy55852u inputs are designed to accept a termination resistor between the true and complement inputs of a differential pair. 0402 form factor chip resistors will fit with some trace fanout. 100 ? 100 ? 100 ? 50 ? sy55852u v cc 50 ? 8ma 50 ? 100 ? 50 ? figure 3b. individually terminated (50 ? ? ? ? ? load cml output) 100 ? 100 ? 200 ? sy55852u v cc 8ma 100 ? 100 ? figure 4. 100 ? ? ? ? ? load cml output
7 superlite sy55852u micrel, inc. m9999-060407 hbwhelp@micrel.com or (408) 955-1690 10-pin msop (k10-1) micrel, inc. 2180 fortune drive san jose, ca 95131 usa tel + 1 (408) 944-0800 fax + 1 (408) 474-1000 web http://www.micrel.com the information furnished by micrel in this datasheet is believed to be accurate and reliable. however, no responsibility is as sumed by micrel for its use. micrel reserves the right to change circuitry and specifications at any time without notification to the customer. micrel products are not designed or authorized for use as components in life support appliances, devices or systems where malfu nction of a product can reasonably be expected to result in personal injury. life support devices or systems are devices or systems that (a) are intend ed for surgical implant into the body or (b) support or sustain life, and whose failure to perform can be reasonably expected to result in a significant inj ury to the user. a purchaser s use or sale of micrel products for use in life support appliances, devices or systems is at purchaser s own risk and purchaser agrees to fully indemnify micrel for any damages resulting from such use or sale. ? 2005 micrel, incorporated.
|
