1 idt74gtlp816 gtlp / ttl 1:2 / 1:6 clock driver industrial temperature range august 2003 2003 integrated device technology, inc. dsc-5965/13 c idt74gtlp816 industrial temperature range gtlp/ttl 1:2/1:6 clock driver description: the gtlp816 is a gtlp to ttl (1:6) and ttl to gtlp (1:2) clock driver with inverting outputs. the clock driver provides a high-speed interface between cards operating at ttl logic levels and back-planes operating at gtlp logic levels. gtlp provides reduced output swing (<1v), reduced input threshold levels, and output edge-rate control to minimize signal setting times. the gtlp816 is a derivative of the gunning transceiver logic (gtl) jedec standard jesd8-3 and incorporates internal edge-rate control, which is process, voltage, and temperature (pvt) compensated. gtlp output low voltage is typically less than 0.5v. the output high is 1.5v, and the receiver threshold is 1v. the gtlp816 is available in industrial temperature range (-40 c to +85 c). see ordering information for details. oea oa 0 oa 1 oa 2 oa 3 oa 4 oa 5 gtlpin ttlin ob 0 ob 1 oeb the idt logo is a registered trademark of integrated device technology, inc. features: ? 5v or 3.3v operation ? interface between gtlp and ttl logic levels ? gtlp to ttl 1:6 fanout ? ttl to gtlp 1:2 fanout ? edge rate control circuit reduces output noise on gtlp port ?v ref pin provides reference voltage for receiver threshold ? cmos technology for low power dissipation ? special pvt compensation circuitry to provide consistent perfor- mance over variations of process, supply voltage, and temperature ? 5v tolerant inputs and outputs on ttl ports ? ttl-compatible driver and control inputs ? high output source/sink 24ma on ttl ports ? high output sink +34ma on gtlp ports ? open drain on gtlp to support wired-or connection ? available in tssop package functional block diagram
2 industrial temperature range idt74gtlp816 gtlp / ttl 1:2 / 1:6 clock driver tssop top view pin configuration ttlin gndt oa 1 gndt gnd t oa 0 v cct oa 2 oa 3 v cct oa 4 oa 5 gndt gndg ob 0 oea oeb v ref gndg ob 1 gndg gtlpin gndt v cc 2 3 4 5 6 7 8 9 10 11 12 15 14 13 16 17 18 19 20 21 22 23 24 1 absolute maximum ratings (1,2) symbol rating max. unit v cc supply voltage ?0.5 to +7 v v cct v i dc input voltage ?0.5 to +7 v v o dc output voltage 3-s tate ?0.5 to +7 v active ?0.5 to v cc + 0.5 i ol dc output sink current into oa 64 ma i oh dc output source current from oa ?64 ma i ol dc output sink current into ob 80 ma (in the low state) i ik dc input diode current v i < 0v ?50 ma i ok dc output diode current v o < 0v ?50 ma v o > v cc +50 t stg storage temperature ?65 to +150 c notes: 1. stresses greater than those listed under absolute maximum ratings may cause permanent damage to the device. this is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. exposure to absolute maximum rating conditions for extended periods may affect reliability. 2. unused inputs must be held high or low. capacitance (t a = +25c, f = 1.0mh z ) symbol parameter (1) conditions typ. (2) max. unit c in control pins/gtlpin/ttlin v i = v cc or 0 3.7 ? pf c out oax v i = v cc or 0 7 ? pf obx v i = v cc or 0 7 ? pf notes: 1. as applicable to the device type. 2. all typical values are at v cc , v cct = 5v, t a = 25 c pin description pin names description ttlin, gtlpin clock inputs (ttl and gtlp) oeb clock enable for gtlp outputs. set low for normal operation. oea clock enable for ttl outputs. set low for normal operation. v cct power supply for ttl clock outputs gndt ground for ttl clock outputs v cc power supply for internal circuitry gndg ground for gtlp clock outputs v ref voltage reference input oa [5:0] ttl clock outputs (inverted) ob [1:0] gtlp clock outputs (inverted) function table (1) inputs outputs (2) oeb oea gtlpin ttlin oax obx ll h h l l ll l l h h hh x x z z notes: 1. h = high voltage level l = low voltage level x = don?t care z = high impedance 2. output polarity is inverting.
3 idt74gtlp816 gtlp / ttl 1:2 / 1:6 clock driver industrial temperature range recommended operating conditions (1) symbol rating min. typ. max. unit v cc ,v cct supply voltage 4.75 5 5.25 v v tt bus termination voltage gtlp 1.47 1.53 v v ref 0.98 1.02 v i input voltage on ttlin and control pins 0 ? 5.5 v i oh high level output current (oax) ? ? -24 ma i ol low level output current (oax) ? ? +24 ma i ol low level output current (obx) ? ? +34 ma t a operating temperature ?40 +25 +85 c note: 1. unused inputs must be held high or low. notes: 1. all typical values are at v cc , v cct = 5v, and t a = 25c. 2. ? i cc is the increase in supply current for each input that is at the specified ttl voltage level rather than v cc or gnd. dc electrical characteristics over operating range following conditions apply unless otherwise specified: industrial: t a = ?40c to +85c; v ref = 1v; v cc , v cct = 5v 5% symbol parameter test conditions min. typ. (1) max. unit v ih gtlpin v ref + 0.05 ? v tt v all others 2 ? ? v il gtlpin 0 ? v ref ? 0.05 v all others ? ? 0.8 v ref gtlp ?1?v gtl ? 0.8 ? v tt gtlp ? 1.5 ? v gtl ? 1.2 ? v ik v cc = min, i i = ?18ma ? ? ?1.2 v i oh = ?100a v cc ?0.2 ? ? v oh oax v cc = min i oh = ?18ma 2.4 ? ? v i oh = ?24ma 2.2 ? ? i ol = 100a ? ? 0.2 v ol oax v cc = min i ol = 18ma ? ? 0.4 v i ol = 24ma ? ? 0.5 v ol obx v cc = min i ol = 100a ? ? 0.2 v i ol = 34ma ? ? 0.65 i i ttlin/control pins v cc = max v i = 5.25v or 0v ? ? 5 a gtlpin v i = v tt or 0v ? ? 5 i off ttlin v cc = 0 v i or v o = 0 to 5.25v ? ? 100 a i ozh oax v cc = max v o = 5.25 v ? ? 5 a obx v o = 1.5v ? ? 5 i ozl oax v cc = max v o = 0 ???5a i cc oax or obx v cc = max outputs high ? 7 18 outputs low ? 7 20 ma v i = v cc or gnd outputs disabled ? 7 20 ? i cc (2) ttlin v cc = max v i = v cc - 2.1 ? ? 6 ma
4 industrial temperature range idt74gtlp816 gtlp / ttl 1:2 / 1:6 clock driver ac electrical characteristics (1,2) following conditions apply unless otherwise specified: industrial: t a = ?40c to +85c; v ref = 1v; v cc , v cct = 5v 5% symbol parameter min. typ. (3) max. unit t plh ttlin to obx 1.5 3.8 6 ns t phl 1.5 2.8 5 t plh oeb to obx 1.5 6.4 10.5 ns t phl 1.5 3.2 6 t plh gtlpin to oax 1.5 4.4 6.5 ns t phl 1.5 4 6 t r obx output rise time (20% to 80%) ? 2.3 ? ns t f obx output fall time (20% to 80%) ? 2.3 ? t r oax output rise time (10% to 90%) ? 2 ? ns t f oax output fall time (10% to 90%) ? 2 ? t sk(o) output skew (4) ? 0.2 1 ns t pzh oea to oax 0.5 3.6 6.5 ns t pzl t phz 0.5 3.8 6.5 ns t plz notes: 1. see test circuits and waveforms. 2. unless otherwise noted, v ref = 1v, c l = 30pf for obx, and c l = 50pf for oax. 3. typical values are at v cc , v cct = 5v, and t a = 25c. 4. skew specs are given for specific, worst case v cc temp. skew values between the obx outputs could vary on the backplane due to loading and impedance seen by the device.
5 idt74gtlp816 gtlp / ttl 1:2 / 1:6 clock driver industrial temperature range recommended operating conditions (1) symbol rating min. typ. max. unit v cc ,v cct supply voltage 3.15 3.3v 3.45 v v tt bus termination voltage gtlp 1.47 1.53 v v ref 0.98 1.02 v i input voltage on ttlin and control pins 0 ? 5.5 v i oh high level output current (oax) ? ? ?12 ma i ol low level output current (oax) ? ? 12 ma i ol low level output current (obx) ? ? 50 ma t a operating temperature ?40 +25 +85 c note: 1. unused inputs must be held high or low. notes: 1. all typical values are at v cc , v cct = 3.3v, and t a = 25c. 2. ? i cc is the increase in supply current for each input that is at the specified ttl voltage level rather than v cc or gnd. dc electrical characteristics over operating range following conditions apply unless otherwise specified: industrial: t a = ?40c to +85c; v ref = 1v; v cc , v cct = 3.3v 0.15v symbol parameter test conditions min. typ. (1) max. unit v ih gtlpin v ref + 0.05 ? v tt v all others 2 ? ? v il gtlpin 0?v ref ? 0.05 v all others ? ? 0.8 v ref gtlp ?1?v gtl ? 0.8 ? v tt gtlp ? 1.5 ? v gtl ? 1.2 ? v ik v cc = min, i i = ?18ma ? ? ?1.2 v i oh = ?100a v cc ?0.2 ? ? v oh oax v cc = min i oh = ?6ma 2.4 ? ? v i oh = ?12ma 2.2 ? ? i ol = 100a ? ? 0.2 v ol oax v cc = min i ol = 6ma ? ? 0.4 v i ol = 12ma ? ? 0.5 v ol obx v cc = min i ol = 100a ? ? 0.2 v i ol = 50ma ? ? 0.55 i i ttlin/control pins v cc = max v i = 5.25v or 0v ? ? 5 a gtlpin v i = v tt or 0v ? ? 5 i off ttlin v cc = 0 v i or v o = 0 to 3.45v ? ? 10 a i ozh oax v cc = max v o = 3.45v ? ? 5 a obx v o = 1.5v ? ? 5 i ozl oax v cc = max v o = 0 ???5a i cc oax or obx v cc = max outputs high ? 8 15 outputs low ? 8 15 ma v i = v cc or gnd outputs disabled ? 7 15 ? i cc (2) ttlin v cc = max v i = v cc - 2.1 ? ? 1 ma
6 industrial temperature range idt74gtlp816 gtlp / ttl 1:2 / 1:6 clock driver ac electrical characteristics (1,2) following conditions apply unless otherwise specified: industrial: t a = ?40c to +85c; v ref = 1v; v cc , v cct = 3.3v 0.15v symbol parameter min. typ. (3) max. unit t plh ttlin to obx 2 3.5 5 ns t phl 2.2 3.7 5.5 t plh oeb to obx 2 3.5 5 ns t phl 2.3 3.8 5.5 t plh gtlpin to oax 2.5 4.3 6 ns t phl 2 3.5 5 t r obx output rise time (20% to 80%) ? 1.7 ? ns t f obx output fall time (20% to 80%) ? 1.7 ? t r oax output rise time (10% to 90%) ? 4 ? ns t f oax output fall time (10% to 90%) ? 3 ? t sk(o) output skew (4) ? 0.1 0.5 ns t pzh oea to oax 2 4.3 6.5 ns t pzl t phz 2.5 5 7 ns t plz notes: 1. see test circuits and waveforms. 2. unless otherwise noted, v ref = 1v, c l = 30pf for obx, and c l = 50pf for oax. 3. typical values are at v cc , v cct = 3.3v, and t a = 25c. 4. skew specs are given for specific, worst case v cc temp. skew values between the obx outputs could vary on the backplane due to loading and impedance seen by the device.
7 idt74gtlp816 gtlp / ttl 1:2 / 1:6 clock driver industrial temperature range 6v open gnd input 0v output v oh vm v ol output vm t phl t plh t sk(o) v oh v ol 80% 20% t r, t f input control v ich 0v v oh v ol v ol v oh ? 0.3v v oh v ol + 0.3v 1.5v output waveform 1 output waveform 2 t plz t pzl t pzh t phz 1.5v v t v t 1.5v for ttl, 1v for gtlp, 0.8v for gtl v h 500 ? c l = 50pf 500 ? 25 ? 30pf from output under test 1.5v (gtlp) 1.2v (gtl) from output under test s (1) (1) test circuits and waveforms test circuit for oa outputs note: 1. c l includes probes and jig capacitance. c l = 30pf is used for worst case. note: 1. c l includes probes and jig capacitance. notes: waveform 1 is for an output with internal conditions such that the output is low except when disabled by the output control. waveform 2 is for an output with internal conditions such that the output is high except when disabled by the output control. all input pulses have the following characteristics: frequency = 10 mhz, t r = t f = 2 ns, z o = 50 ? . the outputs are measured one at a time with one transition per measurement. voltage waveforms pulse duration (v h = 5v for v cc = 5v and 3v for v cc = 3.3v for ttl, 1.5v for gtlp, 1.2v for gtl) (v m = v cc /2 for v cc = 5v and 1.5v for v cc = 3.3v for oax, 1v for obx) voltage waveforms enable and disable times (oax) (v ich = 5v for v cc = 5v, 3v for v cc = 3.3v) (v t = v cc /2 for v cc = 5v, 1.5v for v cc = 3.3v) switch position test switch open drain disable low 6v enable low disable high gnd enable high all other tests open test circuit for ob outputs
8 industrial temperature range idt74gtlp816 gtlp / ttl 1:2 / 1:6 clock driver ordering information idt74gtlp xxx xx package device type pg thin shrink small outline package gtlp/ttl 1:2/1:6 clock driver 816 xx process i -40c to +85c (industrial) corporate headquarters for sales: for tech support: 2975 stender way 800-345-7015 or 408-727-6116 logichelp@idt.com santa clara, ca 95054 fax: 408-492-8674 (408) 654-6459 www.idt.com
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