?999 fairchild semiconductor corporation www.fairchildsemi.com 74lvt2245, 74lvth2245 rev. 1.5.0 ja n uary 2008 74lvt2245, 74lvth2245 ?low voltage octal bidirectional transceiver with 3-state inputs/outputs and 25 ? series resistors in the b port outputs 74lvt2245, 74lvth2245 low voltage octal bidirectional transceiver with 3-state inputs/outputs and 25 ? series resistors in the b port outputs features input and output interface capability to systems at 5v v cc equivalent 25 ? series resistor on b port outputs bushold data inputs eliminate the need for external pull-up resistors to hold unused inputs (74lvth2245), also available without bushold feature (74lvt2245) live insertion/extraction permitted power up/down high impedance provides glitch-free bus loading outputs source/sink ?2ma/+12ma on b port, ?2ma/+64ma on a port latch-up performance exceeds 500ma esd performance: ? human-body model > 2000v ? machine model > 200v ? charged-device model > 1000v general description the lvt2245 and lvth2245 contain eight non-inverting bidirectional buffers with 3-state outputs and are intended for bus-oriented applications. the transmit/ receive (t/r ) input determines the direction of data flow through the bidirectional transceiver. transmit (active- high) enables data from a ports to b ports; receive (active-low) enables data from b ports to a ports. the output enable input, when high, disables both a and b ports by placing them in a high impedance state. the equivalent 25 ? -series resistor in the b port helps reduce output overshoot and undershoot. the lvth2245 data inputs include bushold, eliminating the need for external pull-up resistors to hold unused inputs. these transceivers are designed for low voltage (3.3v) v cc applications, but with the capability to provide a ttl interface to a 5v environment. the lvt2245 and lvth2245 are fabricated with an advanced bicmos technology to achieve high speed operation similar to 5v abt while maintaining low power dissipation. ordering information device also available in tape and reel. specify by appending suffix letter ??to the ordering number. all packages are lead free per jedec: j-std-020b standard. order number package number package description 74lvt2245wm m20b 20-lead small outline integrated circuit (soic), jedec ms-013, 0.300" wide 74lvt2245sj m20d 20-lead small outline package (sop), eiaj type ii, 5.3mm wide 74lvt2245mtc mtc20 20-lead thin shrink small outline package (tssop), jedec mo-153, 4.4mm wide 74lvth2245wm m20b 20-lead small outline integrated circuit (soic), jedec ms-013, 0.300" wide 74lvth2245sj m20d 20-lead small outline package (sop), eiaj type ii, 5.3mm wide 74lvth2245mtc mtc20 20-lead thin shrink small outline package (tssop), jedec mo-153, 4.4mm wide
?999 fairchild semiconductor corporation www.fairchildsemi.com 74lvt2245, 74lvth2245 rev. 1.5.0 2 74lvt2245, 74lvth2245 ?low voltage octal bidirectional transceiver with 3-state inputs/outputs and 25 ? series resistors in the b port outputs connection diagram pin description logic symbols ieee/iec truth table h = high voltage level l = low voltage level x = immaterial pin names description oe output enable input t/r tr ansmit/receive input a 0 ? 7 side a inputs or 3-state outputs b 0 ? 7 side b inputs or 3-state outputs inputs outputs oe t/r ll bus b data to bus a lh bus a data to bus b hx high-z state
?999 fairchild semiconductor corporation www.fairchildsemi.com 74lvt2245, 74lvth2245 rev. 1.5.0 3 74lvt2245, 74lvth2245 ?low voltage octal bidirectional transceiver with 3-state inputs/outputs and 25 ? series resistors in the b port outputs absolute maximum ratings stresses exceeding the absolute maximum ratings may damage the device. the device may not function or be operable above the recommended operating conditions and stressing the parts to these levels is not recommended. in addition, extended exposure to stresses above the recommended operating conditions may affect device reliability. the absolute maximum ratings are stress ratings only. note: 1. i o absolute maximum rating must be observed. recommended operating conditions the recommended operating conditions table defines the conditions for actual device operation. recommended operating conditions are specified to ensure optimal performance to the datasheet specifications. fairchild does not recommend exceeding them or designing to absolute maximum ratings. symbol parameter rating v cc supply voltage ?.5v to +4.6v v i dc input voltage ?.5v to +7.0v v o dc output voltage output in 3-state ?.5v to +7.0v output in high or low state (1) ?.5v to +7.0v i ik dc input diode current, v i < gnd ?0ma i ok dc output diode current, v o < gnd ?0ma i o dc output current, v o > v cc output at high state 64ma output at low state 128ma i cc dc supply current per supply pin ?4ma i gnd dc ground current per ground pin ?28ma t stg storage temperature ?5? to +150? symbol parameter min max units v cc supply voltage 2.7 3.6 v v i input voltage 0 5.5 v i oh high-level output current a port ?2 ma b port ?2 i ol low-level output current a port 64 ma b port 12 t a f ree air operating temperature ?0 +85 ? ? t / ? v input edge rate, v in = 0.8v?.0v, v cc = 3.0v 0 10 ns/v
?999 fairchild semiconductor corporation www.fairchildsemi.com 74lvt2245, 74lvth2245 rev. 1.5.0 4 74lvt2245, 74lvth2245 ?low voltage octal bidirectional transceiver with 3-state inputs/outputs and 25 ? series resistors in the b port outputs dc electrical characteristics notes: 2. applies to bushold versions only (74lvth2245). 3. an external driver must source at least the specified current to switch from low-to-high. 4. an external driver must sink at least the specified current to switch from high-to-low. 5. this is the increase in supply current for each input that is at the specified voltage level rather than v cc or gnd. symbol parameter v cc (v) conditions t a = ?0? to +85? units min. max. v ik input clamp diode voltage 2.7 i i = ?8ma ?.2 v v ih input high voltage 2.7?.6 v o 0.1v or v o v cc ?0.1v 2.0 v v il input low voltage 2.7?.6 0.8 v v oh output high voltage a port 2.7 i oh = ?ma 2.4 v 3.0 i oh = ?2ma 2.0 b port 3.0 i oh = ?2ma 2.0 2.7?.6 i oh = ?00? v cc ?.2 v ol output low voltage a port 2.7 i ol = 24ma 0.5 v 3.0 i ol = 16ma 0.4 3.0 i ol = 32ma 0.5 3.0 i ol = 64ma 0.55 b port 3.0 i ol = 12ma 0.8 2.7 i ol = 100? 0.2 i i(hold) (2) bushold input minimum drive 3.0 v i = 0.8v 75 ? v i = 2.0v ?5 i i(od) (2) bushold input over-drive current to change state 3.0 (3) 500 ? (4) ?00 i i input current 3.6 v i = 5.5v 10 ? control pins 3.6 v i = 0v or v cc ? data pins 3.6 v i = 0v ? v i = v cc 1 i off po w er off leakage current 0 0v v i or v o 5.5v ?00 ? i pu/pd po w er up/down, 3-state current 0?.5 v o = 0.5v to 3.0v, v i = gnd or v cc ?00 ? i ozl 3-state output leakage current 3.6 v o = 0.5v ? ? i ozl (2) 3-state output leakage current 3.6 v o = 0.0v ? ? i ozh 3-state output leakage current 3.6 v o = 3.0v 5 a i ozh (2) 3-state output leakage current 3.6 v o = 3.6v 5 a i ozh + 3-state output leakage current 3.6 v cc < v o 5.5v 10 ? i cch po w er supply current 3.6 outputs high 0.19 ma i ccl po w er supply current 3.6 outputs low 5 ma i ccz po w er supply current 3.6 outputs disabled 0.19 ma i ccz +p ow er supply current 3.6 v cc v o 5.5v, outputs disabled 0.19 ma ? i cc increase in power supply current (5) 3.6 one input at v cc ?0.6v, other inputs at v cc or gnd 0.2 ma
?999 fairchild semiconductor corporation www.fairchildsemi.com 74lvt2245, 74lvth2245 rev. 1.5.0 5 74lvt2245, 74lvth2245 ?low voltage octal bidirectional transceiver with 3-state inputs/outputs and 25 ? series resistors in the b port outputs dynamic switching characteristics (6) notes: 6. characterized in soic package. guaranteed parameter, but not tested. 7. max number of outputs defined as (n). n? data inputs are driven 0v to 3v. output under test held low. ac electrical characteristics note: 8. skew is defined as the absolute value of the difference between the actual propagation delay for any two separate outputs of the same device. the specification applies to any outputs switching in the same direction, either high-to-low (t oshl ) or low-to-high (t oslh ). capacitance (9) note: 9. capacitance is measured at frequency f = 1mhz, per mil-std-883, method 3012. symbol parameter v cc (v) conditions t a = 25? units c l = 50pf, r l = 500 ? min. typ. max. v olp quiet output maximum dynamic v ol 3.3 (7) 0.8 v v olv quiet output minimum dynamic v ol 3.3 (7) ?.8 v symbol parameter t a = ?0? to +85?, c l = 50pf, r l = 500 ? units v cc = 3.3v ?0.3v v cc = 2.7v min. max. min. max. t plh propagation delay data to b port output 1.2 4.4 1.2 5.1 ns t phl 1.2 4.4 1.2 5.1 t plh propagation delay data to a port output 1.2 3.6 1.2 4.0 ns t phl 1.2 3.5 1.2 4.0 t pzh output enable time for b port output 1.3 6.2 1.3 7.3 ns t pzl 1.7 6.2 1.7 7.3 t pzh output enable time for a port output 1.3 5.5 1.3 7.1 ns t pzl 1.7 5.7 1.7 6.7 t phz output disable time for b port output 2.0 5.9 2.0 6.5 ns t plz 2.0 5.4 2.0 5.7 t phz output disable time for a port output 2.0 5.9 2.0 6.5 ns t plz 2.0 5.0 2.0 5.1 t oshl , t oslh a port output to output skew (8) 1.0 1.0 ns t oshl , t oslh b port output to output skew (8) 1.0 1.0 ns symbol parameter conditions typical units c in input capacitance v cc = 0v, v i = 0v or v cc 4pf c i/o input/output capacitance v cc = 3.0v, v o = 0v or v cc 8pf
?999 fairchild semiconductor corporation www.fairchildsemi.com 74lvt2245, 74lvth2245 rev. 1.5.0 6 74lvt2245, 74lvth2245 ?low voltage octal bidirectional transceiver with 3-state inputs/outputs and 25 ? series resistors in the b port outputs physical dimensions figure 1. 20-lead small outline integrated circuit (soic), jedec ms-013, 0.300" wide pa c kage drawings are provided as a service to customers considering fairchild components. drawings may change in any manner without notice. please note the revision and/or date on the drawing and contact a fairchild semiconductor representative to ver ify or obtain the most recent revision. package speci?ations do not expand the terms of fairchild s worldwide terms and conditions, speci?ally the warranty therein, which covers fairchild products. always visit fairchild semiconductor s online packaging area for the most recent package drawings: http://www .f airchildsemi.com/pac kaging/ 0.10 c c a see detail a notes: unless otherwise specified a) this package conforms to jedec ms-013, variation ac, issue e b) all dimensions are in millimeters. c) dimensions do not include mold flash or burrs. e) landpattern standard: soic127p1030x265-20l pin one indicator 0.25 1 10 b c a m 20 11 b x45 8 0 seating plane gage plane detail a scale: 2:1 seating plane land pattern recommendation f) drawing filename: mkt-m20brev3 0.65 1.27 2.25 9.50 13.00 12.60 11.43 7.60 7.40 10.65 10.00 0.51 0.35 1.27 2.65 max 0.30 0.10 0.33 0.20 0.75 0.25 (r0.10) (r0.10) 1.27 0.40 (1.40) 0.25 d) conforms to asme y14.5m-1994
?999 fairchild semiconductor corporation www.fairchildsemi.com 74lvt2245, 74lvth2245 rev. 1.5.0 7 74lvt2245, 74lvth2245 ?low voltage octal bidirectional transceiver with 3-state inputs/outputs and 25 ? series resistors in the b port outputs physical dimensions (continued) figure 2. 20-lead small outline package (sop), eiaj type ii, 5.3mm wide pa c kage drawings are provided as a service to customers considering fairchild components. drawings may change in any manner without notice. please note the revision and/or date on the drawing and contact a fairchild semiconductor representative to ver ify or obtain the most recent revision. package speci?ations do not expand the terms of fairchild s worldwide terms and conditions, speci?ally the warranty therein, which covers fairchild products. always visit fairchild semiconductor s online packaging area for the most recent package drawings: http://www .f airchildsemi.com/pac kaging/
?999 fairchild semiconductor corporation www.fairchildsemi.com 74lvt2245, 74lvth2245 rev. 1.5.0 8 74lvt2245, 74lvth2245 ?low voltage octal bidirectional transceiver with 3-state inputs/outputs and 25 ? series resistors in the b port outputs physical dimensions (continued) figure 3. 20-lead thin shrink small outline package (tssop), jedec mo-153, 4.4mm wide pa c kage drawings are provided as a service to customers considering fairchild components. drawings may change in any manner without notice. please note the revision and/or date on the drawing and contact a fairchild semiconductor representative to ver ify or obtain the most recent revision. package speci?ations do not expand the terms of fairchild s worldwide terms and conditions, speci?ally the warranty therein, which covers fairchild products. always visit fairchild semiconductor s online packaging area for the most recent package drawings: http://www .f airchildsemi.com/pac kaging/
?999 fairchild semiconductor corporation www.fairchildsemi.com 74lvt2245, 74lvth2245 rev. 1.5.0 9 trademarks th ef ollowing includes registered and unregistered trademarks and service marks, owned by fairchild semiconductor and/or its global s ubsidiaries, and is not intended to be an exhaustive list of all such trademarks. acex build it now coreplus crossvolt ctl current transfer logic ecospark ezswit ch * fairchild fairchild semiconductor fact quiet series fact fast fastvcore flashwriter ? fps frfet global power resource sm green fps green fps e-series gto i-lo intellimax isopla nar m egabuck mi crocoupler microfet micropak mi llerdrive mo ti on-spm optologic optopl anar pdp-spm pow er220 poweredge power-spm po we rtrench pr ogrammable active droop qfet qs qt optoelectronics quiet series rapidconfigure smart start spm stealth s uperfet su persot -3 s upersot -6 s upersot -8 s upremos syncfet the power franchise tinyboost tinybuck tinylogic tinyopto tinypower tinypwm tinywire serdes uhc ultra f rfet unifet vcx *ezswi tch and flashwriter are trademarks of system general corporation, used under license by fairchild semiconductor. disc laimer fa i rchild semiconductor reserves the right to make changes without further notice to any products herein to improve reliability, function, or design. fairchild does not assume any liability arising out of the application or use of any pro duct or circuit described herein; neither does it convey any license under its patent rights, nor the rights of others. these speci fications do not expand t he terms of fairchild? wo rl dw ide terms and conditions, specifically the warranty therein, which covers these products. life support policy fa i rchild s products are not authorized for use as critical components in life support devices or systems without the express written approval of fairchild semiconductor corporation. as used herein: 1. life support devices or systems are devices or systems wh ic h, (a) are intended for surgical implant into the body or (b) support or sustain life, and (c) whose failure to perform wh en properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury of the user. 2. a critical component in any component of a life support, device, or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. pr oduct status definitions defi nition of terms da tasheet identification product status definition ad vance information formative or in design this datasheet contains the design specifications for product development. specifications may change in any manner without notice. pr eliminary first production this datasheet contains preliminary data; supplementary data will be published at a later date. fairchild semiconductor reserves the right to ma ke c hanges at any time without notice to improve design. no identification needed full production this datasheet contains final specifications. fairchild semiconductor reserves the right to make changes at any time without notice to improve the des i gn. obsolete not in production this datasheet contains specifications on a product that has been discontinued by fairchild semiconductor. the datasheet is printed for reference information only. rev. i33 74lvt2245, 74lvth2245 ?low voltage octal bidirectional transceiver with 3-state inputs/outputs and 25 ? series resistors in the b port outputs
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