74FR245 NSC | Alldatasheet
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N . > ZANational Neroroerne | Pe] Semiconductor i) a 74FR245 9 Octal Bidirectional Transceiver with TRI-STATE® Outputs | = General Description Features Q The ‘FR245 contains eight non-inverting bidirectional buff- ™ Non-inverting buffers a ers with TRISTATE outputs and is intended for bus-orient- ™ Bidirectional data path x ed applications. Current sinking capability is 64 mA on both # A and B output sink capability of 64 mA, source capa- g the A and B ports. The Transmit/Receive (T/A) input deter- bility of 15 mA > mines the direction of data flow through the bidirectional gm Guaranteed 4000V minimum ESD protection roe transceiver. Transmit (active HIGH) enables data from Ag Guaranteed pin to pin skew Ss ports to B ports; Receive (active LOW) enables data from B D> ports to A ports. The Output Enable input, when HIGH, dis- _— ables both A and B ports by placing them in a High Z condi- = tion. Py} s ao oO Logic Symbol Connection Diagram s Pin Assignment for =) a A Ay Ay Ay Ay As Ag Ay DIP and SOIC = o - wy, =~ IRN Es s = TR 7D eG: Yoo Rm 8 (oS tle x | 0 _By Bp Bs By Bs By By , Tbe Bs] a 0 = TUF /10887~1 fae ttt ies Y . 7) teal, =- “ee mm Agta fo) we eel 125° S ono 22 Ca ite => 7 mo) Twenoaer-2 = FAST® and TALSTATE® are registered trademarks of National Semiconductor Corporation. ©1990 Natonal Semiconductor Corporation TL/E/10887 ( RRO-B20M110/Prntodin U.S.A
Pin Descriptions Truth Table [ Pin Names _| Description [tmputs [ OE _| Output Enable input (Active Low) OE TA L L Bus B Data to Bus A Side A Inputs or TRI-STATE Outputs L H Bus A Data to Bus B H x High Z State Side B Inputs or TRI-STATE Outputs H = HIGH Voltage Level L = LOW Voltage Level X = Immaterial Logic Diagram "FR245 ho Ay hy hs Me hs hs Ay “THEA ATA TA IK TU To . LS A Z\\ Z\\ Z\\ Z\\ Z\\ Z\\ Z\\ ve 8 8 By By 8, Bs 85 8, TUF 10887-3
Absolute Maximum Ratings (note 1) If Military/Aerospace specified devices are required, Current Applied to Output please contact the National Semiconductor Sales in LOW State (Max) twice the rated Io. (mA) Office/Distributors for availability and specifications. ESD Last Passing Voltage (Min) 4000V Storage Temperature —65°C to + 150°C Note 1: Absolute maximum ratings are values beyond which the device may Ambient Temperature under Bias 55°C to + 125°C be damaged or have its useful life impaired. Functional operation under - these conditions is not implied. Junction Temperature under Bias Note 2: Either voltage limit or current limit is sufficient to protect inputs. Ceramic -55°C to + 175°C y rete sential SSC to + 160°C Recommended Operating cc Pin Potential to sae Ground Pin -0.5V to +7.0V Conditions Input Voltage (Note 2) —0.5V to +7.0V Free Air Ambient Temperature oCto +70°C Input Current (Note 2) =30 mA to +5.0 mA 3 "Volto ° upply Voltage Voltage Applied to Output a in HIGH State (with Voc = OV) Commercial +4.5V to +5.5V Standard Output =0.5V to Voc TRI-STATE Output —0.5V to +5.5V 74FR Symbol Conditions Min Typ Max vu Input HIGH Voltage feo Tv TT Recogrizes HIGH Signa Vi Input LOW Voltage [oe Tv TT Recognized LOW Signal Veo InputClamp Diode Votage [2 |v | Min [iy = —18mA Vou Output HIGH Voltage poe Pv in [tg = ama in 8) ee ee Vou Output LOW Vottage Poss Pv Loin [ton = 64 ma An Be) im Input HIGH Current Po nk ae Vin = 2.70 08,17) Ipvi Input HIGH Current = J Breakdown Test 7 HA Vin = 7.0V (OE, T/A) Ievir Input HIGH Current _ Breakdown Test (I/O) BA Vin = 8.8V (Any Bn) in Input LOW Current Po 250 nT Max | Vin = 0.5 OETA) Vio Input Leakage Test 475 Vv lip = 1.9 pA : All Other Pins Grounded lop Output Circuit 375 Vv Viop = 150 mV Leakage Test ° All Other Pins Grounded Iii + lozH_ | Output Leakage Current po | Max | Vour = 2:70 (An. Bo) nw +loa | Outputteskagecurent | 150 | wa | Max | Vout = 0.5V (An Br) los OuiputShortGrevitGurent | 100 225 [| ma_| Max | Vour = 00V (An Ba) loex OuiputHigh Leakage Curent | 80 [A | Max | Vour = Veo (An Br) lz Bus Drainage Test Po t00 nf 0.0 | our = 5.250 An Ba) locH Power Supply Current 55 75 | mA | Max | AllOutputs HIGH lect Power Supply Current 75 110 | ma _| Max | AllOutputs Low loz Power Supply Current 55 75__| mA | Max | Outputs TRI-STATE Ow Input Capacttance a [oo | 50 | nn
Ta = +25°C Ta = Comm Symbol Parameter Voc = +5.0V Vec = Comm Units. C. = 50 pF Ci = 50 pF Min typ Max | Min Max | teLH Propagation Delay 1.0 26 3.9 1.0 39 ns teHL Aq to Bp oF By to An 1.0 17 3.9 1.0 3.9 tezH Output Enable Time 25 5.0 70 25 7.0 ns tezi 25 43 7.0 25 7.0 tpHz Output Disable Time WT 3.7 65 17 65 ns teLz W7 3.6 65 17 65 Extended AC Characteristics 74FR 74FR = +25 Ta = +280 Ta = Comm Vec = Comm _ CL = 50 pF Vec = Comm bol Cy = 250 pF Units Symi Eight Outputs Switching ‘No te 3. (Note 2) tel Propagation Delay 1.0 59 25 75 ns teHL Ap to Bp or Br to An, 1.0 59 25 75 tezH Output Enable Time 25 11.9 ns tpzi 25 11.9 tpuz Output Disable Time 13 65 ns tpLz 13 65 . tosHL Pin to Pin Skew TBD ns (Note 1) for HL Transitions tos. Pin to Pin Skew TBD ns (Note 1) for LH Transitions tost Pin to Pin Skew TBD ns (Note 1) for HL/LH Transitions Note 1: Skew is defined as the absolute value of the difference between the actual propagation delays for any two outputs of the same device. The specification applies to any outputs switching high to low (tosxL), low to high (tosiH). of any combination of high to low and/or low to high (tost). Note 2: This specification is guaranteed but not tested. The limits apply to propagation delays for all paths described switching in phase, i.e. all low-to-high, high-to-low, TRI-STATE-to-high, etc. Note 3: These specifications guaranteed but not tested. The limits represent propagation delays with 250 pF load capacitors in place of the 50 pF load capacitors in the standard AC load. This specification pertains to single output switching only.
Ordering Information
The device number is used to form part of a simplified purchasing code where the package type and temperature range are defined as follows: 74FR 245 P GC QR Temperature Range Family a L Special Variations 74FR = Commercial QR = Commercial grade device F with burn-in Device Type Temperature Range Package Code C = Commercial (0°C to +70°C) P = Plastic DIP S = Small Outline (SOIC) Physical Dimensions inches (milimeters) [este ASAARAABAD I Hit if ffi fin A ages!) Teom—1005) ves00 1 ! ent ‘4 PUDUCUUTE + YUUUETUIEE Pada ser ag we 01010 janx wes) ooze Tan=738) cor—n02s 4, 0.963 -0.108 . (o2s4-0.737) * i ariel i 1 4 QA hee i fo boon=0013 a | nn -0050 T he 208, 2.010.070 yp TYP ALL LEADS: TYP ALL LEADS: ™ 8.008 typ comm moons 20-Lead Small Outline Integrated Circuit (S)
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2 Physical Dimensions inches (milimeters) (Continued) Lite 114630
Ss 0.970-0.990_ i” (2337 x0.762) | 0.032 0.005 w MAX DP A | ama Pe) fa) RAD 0.240-0.260 Fad PINNO IDENT © © (6.036~6.604) PIN NO. 1 DENT —~_ oO; —2t ornioN + a ‘Ee é ail | MIAO ae oe C) | 0.090 [a 0290-0328 000 OPTION 2 Ee 9.290-0.325_ Sal (22706) £ | 006s (1526) aa | fun | G302-o127 =) | is 1 1? \\ ce ES i | i | I , unas Po . (3.683.080) o | S1eesoare | LL I! 0.125-0.150 (0508) c ea80)*™ pad = roe neva) rs} 20-Lead Plastic Dual-In-Line Package (P) c NS Package Number N20B [*) o a wo a N oc irs w LIFE SUPPORT POLICY NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or 2. A critical component is any component of a life systems which, (a) are intended for surgical implant support device or system whose failure to perform can into the body, or (b) support or sustain life, and whose be reasonably expected to cause the failure of the life failure to perform, when properly used in accordance support device or system, or to affect its safety or with instructions for use provided in the labeling, can effectiveness. be reasonably expected to result in a significant injury « to the user. MAR 1 2 1991 ~ wee mee ZA National Semiconductor National Semiconductor National Semiconductor _ National Semiconductor National Semicondutores National Semiconductor Corporation Gmoit Japan Lid. Hong Kong Ltd. Do Brasll a. ‘Austraia) PTY, Lt 2200 Semiconductor Ove industostrasse 10 Sanco Blog. 5¢ Suta $13, th Floor ‘Av Brg. Fan Lima, 1383 1st Floor, 441 Si Kida Re, P.O. Box 58000 10.8080 Furstonelsbrack 4-15 Nish Shinuk Chinachem Golden Paza 60 Ancor Cony 62 Melbourne, 3004 Senta Clara, CA 95052-6080 West Garmany Shank Ku, 77 Mody Road, Tsimshatsu East, 01451 Sao Paulo, SP, Gras Victory. Austra Tet (408) 721-5000 Tor (081-43) 103.0 Tokyo 160, Japan Kowioon, Hong Kong Tok (65/11) 212.5066 Tot (03) 267-5000 TWX: (910) 339-9240 Toles: 527-649 Tek 3.200-7001 Tot 37231200 Fax (65/11) 211-1181 NSBR BR Fax: 61-9-2677458 Fax (08141) 109554 FAX: 3-200.7000 Tole, 52096 NSSEA HX “eoteommmemymemnerinenciryecyecsaspaneneateaen eaearime