Am54S/74S240 -Am54S/74S241 Am54S/74S242 -Am54S/74S243 Am54S/74S244 Octal Buffers/Line Drivers/Line Receivers With Three-State Outputs DISTINCTIVE CHARACTERISTICS Three-state outputs drive bus lines directly Advanced Schottky processing Hysteresis at inputs improve noise margin PNP inputs reduce D.C. loading on bus lines Voi of 0.55V at 64mA for Am74S; 48mA for Am54S Data-to-output propagation delay times: Inverting 7.0ns MAX Non-inverting 9.0ns MAX Enable-to-output 15.0ns MAX 100% reliability assurance testing in compliance with MIL-STD-883 @ 20 pin hermetic and molded DIP packages for Am54S/ 748240, Am54S/74S241, and Am54S/74S$244 FUNCTIONAL DESCRIPTION These buffers/line drivers, used as memory-address drivers, clock drivers, and bus oriented transmitters/receivers, pro- vide improved PC board density. The outputs of the com- mercial temperature range versions have 64mA sink and 15mA source capability, which can be used to drive termi- nated lines down to 1330. The outputs of the military tem- perature range versions have 48mA sink and 12mA source current capability. Featuring 0.2V minimum guaranteed hysteresis at each low-current PNP data input, they provide improved noise rejection and high-fan-out outputs to restore Schottky TTL levels completely. The Am54S/74S240, Am54S/74S241 and Am54S/74S244 have four buffers which are enabled from one common line, and the other four buffers are enabled from another common line. The Am54S/74S240 is inverting, while the Am54S/ 748241 and Am54S/74S244 present true data at the outputs. The Am54S/74S242 and Am54S/74S243 have the two 4-line data paths connected input-to-output on both sides to form an asynchronous transceiver/buffer with complementing enable inputs. The Am54S/74S242 is inverting, while the Am54S/74S243 presents non-inverting data at the outputs. CONNECTION DIAGRAMS Top Views Am54S/74S240 Am54S/748241 Am54S/74S242 Am54S/748243 Am54S/74S8244 ech ad 20[_] cc mtd ad 20[_] Yee mc]:* 47] vce il 1417] Yee 7 ad 20[7] Vee vat (2 rf }i tai ]2 19[] 26 ne] 2 13 [7] 26 we (] 2 13 [] 26 rar Lz 19] % ave C]2 af Jiyi ava ds wef Jivt ay (] 3 v2 [_] nc wy(]3 12 Jac ava[]3 ef] az[]a waa taza 7 Jraa AV (Ja un [Jaay o2zayvt]s uf yeav az [Ja 17 [7] 244 ava L]s wE}yv2 2v3(L]s5 w]e 3ay(C]s wif my 3ay(]s io fJrav ava TJs 16 [_] 12 ra3 [Jo wp ]2a3 az ]e6 [2a AY C}o o9[ jay ay] 9[Jeay tas (Je 15[ 7] 242 aval]? af Jiva 2vz(]7 1a] 3 anol]? s[sy sno lL]? 8 | ]sa v ave]? 14[_] 1a ras(]e 13 r] a2 aa JB 13 [7] 202 MPR-357 MPR-358 1aa (fa 13[_] 202 2avi(]s 12. ]iva avi 9 2.7] va avi (fs 1217] v4 onp [J 10 11.0] 2a1 Gnd [10 nf) zai 6no []10 11[7] 201 Note: Pin 1 is marked for orientation. MPR-355 MPR-356 MPR-359 ORDERING INFORMATION Order Numb Package Temperature raer Number Type Range Am54S/74S240 Am54S/74S241 Am54S/74S242 Am54S/74S243 Am54S/74S244 Hermetic ~55C to +125C SN548240J SN548241J SNS54S242J SN54S243J SN548244) Dice -55C to +125C AM54S240X AM54S241X AM54S242X AM54S243X = AM54S244x Hermetic OC to +70C SN74S240J SN74S241J SN74S242J SN74S8243J SN74S244) Molded 0C to +70C SN74S240N SN74S241N SN74S244N Dice oC ta +70C AM74S240X AM748241X AM74S242X AM74S243X AM74S244X 4-142Am54S/74S240/241/242/243/244 Ty Le > LIC-464 Am54S/74S240 tT 12 242 13 S| YYYY LiC-461 2yY1 lal t 272 2y3 143 t 2Y4 Am54S/748242 LOGIC DIAGRAMS Am54S/748241 Am54S/748244 SANANAN Nore: All gates have input hysteresis. 2yt 4 tat bm 12 o> foe 2a2 L_i3 D> f+. 243 rY4 o> laa = ama 264 tH mS -\ > Ze LiC-462 LiC-463 Am54S/74S243 iG +t ay Ba Ye 2a y {| Sl : 2A 3a y 7 ; < : 6s aa {| 4 | 5A <b 26 Ta 4 > LIC-465 MAXIMUM RATINGS above which the useful life may be impaired Storage Temperature ~65C to +150C Temperature (Ambient) Under Bias -55C to +125C Supply Voltage to Ground Potential DC Voltage Applied to Outputs for HIGH Output State ~0.5V to +7.0V _0.5V to +Vec max. DC Input Voltage -0.5V to +7.0V DC Output Current 150mA DC Input Current 4-143 -30mA to +5.0mAAm54S/74S240/241/242/243/244 ELECTRICAL CHARACTERISTICS The Following Conditions Apply Unless Otherwise Noted: Am54S240'S241 /S242/S243/S244 (MIL) Ta = -55Cto+t25C Vecl(MIN.) =450V Voe:MAX } = 5.50V Am74S240/S241/S242/S243/S244 (COM'L) TaA=OCwr70C VeciMIN}=4.75V VeciMAX.) = $.25V ELECTRICAL CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE Typ. Parameters Description Test Conditions inote 1) Min. (Note 2) Max. Units ViH High-Level! Input Voltage 2.0 Volts Vie Low-Level Input Voltage 0.8 Volts Vik Input Clamp Voltage - Vec=MIN.,1)=18mA -1.2 | Volts Hysteresis (VT4 Vy7-) Vec = MIN. 0.2 0.4 Volts Vec = MIN. COM'L,IQH=-1mA 27 ; ViL=08V | igy=3ama 24 3.4 Vou | High-Level Output Voltage OH - - Valts Voc = MIN. | MIL, Igy = -12mA 2.0 Vit =95V | COM'L, IoH=15mAl 2.0 Vv =MIN. MIL, | =48mA 0.55 VoL Low-Level Output Voltage cc OL Volts ViL=9.8V | COM'L, Io, = 64mA 0.55 "5240, $241 50 lo Off-State Output Current, _ , "$944. 2H High-Level Voltage Applted : Vo=2aVv "S242 Vv =M : , 101 cc = MAX "$243 ' VIH = 2.0V vA "$240 Vit =O.8Vv . | ott tL "$241, -50 | lore State Output Current, Vo =0.5V "$244 | Low-Level Voltage Applied ' $242, _s500 [ $243 \ Input Current at Maximum Vv = MAX., Vy, =5.5V 1 | Input Voltage ce ye 0 ma \ a ae ____| Nhe High-Level Input Current, Any Input Voec = MAX., Vy = 2.7V 50 BA | Any A -400 A tole Low-Level Input Current }/}_-__ Voc = MAX. Vip = 0.5V - AnyG : 2.0 mA los Short-Circuit Output Current (Note 3} Voc = MAX. 50 225 mA _ _ wee ' - -- : All Outputs | MIL 80 123 HIGH cOML 80 135 Am54S/74S240 | All Outputs Voc = MAX. MIL 100 145 mA | Am54S8/748242 Low Outputs open COM'L 100 150 | TTT oi \ | MIL 100 145 Outputs at Hi-Z - : lec | Supply Current COM'L 100 180 Alt Outputs MIL 95 | 147 --} HIGH J come | | 88 180 | | | AmB45 1748241 | ai Outputs Vcc = MAX. MIL 120. | 170 ' Am54S 748243 LOW - mA Am54S$/748244 Outpurs open COML | 120 180 MIL 120 170 Outputs at HI-Z rr tT | COM'L : 120 ' 180 i Notes: 1. For conditions shown as MIN. or MAX., use the appropriate value specified under recommended operating conditions. 2. All typical values are Voc = 5.0V, Ta = 25 C. 3. Not more than one output should be shorted at a time, and duration of the short-circuit should not exceed one second. SWITCHING CHARACTERISTICS (Vcc = 5V, Ta = 25C) Am54S/748240/242 Am54S/74S241/243/244 Parameter Description Test Conditions Min. Typ. Max. Min. Typ. Max. Units Propagation Delay Time, *PLH Low-to-High-Level Output 45 7.0 6.0 9.0 ns Propagation Delay Time, 4.5 7.0 6.0 9.0 PHL High-to-Low-Leve!t Output CL =50pF, Ry = 902 (Note 3} ns t2L Output Enable Time to Low Level 10 15 10 15 ns tZH Output Enable Time to High Level 6.5 410 8.0 12 ns tLz Output Disable Time fram Low Level 10 15 10 15 ns C_ =5.0pF, Ry = 902 (Note 3} tuz Output Disable Time trom High Level 6.0 9.0 | 6.0 9.0 ns 4-144Am54S/74S8240/241/242/243/244 LOAD CIRCUIT FOR VOLTAGE WAVEFORMS THREE-STATE OUTPUTS ENABLE AND DISABLE TIMES, THREE-STATE OUTPUTS TEST : OUTPUT FOIRT. re CONTFOL s LOW LEVE- ad ay ENABLING { u a 4 oy Ta 7 Le Way EFORR 1 7 dow ay & is - S JLCSED bay ee at S2UPEN : CLOSEE a : Ss) Ge FROM GUTPUT UNGER TEST WAVERURNS LIC-487 5 LIC-466 d Notes: 1. Waveform i is for an output with internal conditrons such that the output is low excepr when disabled by the output control. . Waveform 21s for an output with internal conditions such that the output is high except when disabled by the output control. 3. In the examples above, the phase relationships between inputs and outputs have been chosen arbitrarily. PRR < 1.0MHz, Zoy7 502 and ty 2.5ns, tg 2.5ns, N FUNCTION TABLES Am54$/748241 Am54S/74S242 Am54S/74S240 Am54S/74S8243 Am54S/74S244 INPUTS OUTPUTS INPUTS | OUTPUT INPUTS OUTPUTS INPUTS | OUTPUT 2G Y A Y 2G Y GIA L L H H =z reer rIrx & rFrrt ol rrr rix b&b Zz x Zz H H L L L H Cet Z x H H L L APPLICATIONS Am54S/74S241S USED AS REPEATER/LEVEL RESTORER DRIVER RECEIVER 18S241 Ve s24l t LONG LINE REPEATER REPEATER REPESTER 19S241 18 S241 18S241 INPUT OUTPUT c, cm: | > > 1. > 4 Lets ops < a a a INPUT OuTPUT INPUT OUTPUT INPUT OUTPUT INPUT LIC-468 S240 USED AS SYSTEM AND/OR MEMORY BUS DRIVER 4-BIT ORGANIZATION CAN BE APPLIED TO HANDLE BINARY OR BCD CONTROL OR MICROPRCGRAM RGM PROM IOR ADDRESS REGISTER Am54S 745240 : Y VN) YY ei rN SYSTEM AND OR MEMORY 4CDRESS BUS Lic-469 4-145Am54S/74S240/241/242/243/244 INDEPENDENT 4-BIT BUS DRIVERS/RECEIVERS IN A SINGLE PACKAGE 4amr545 74 S240 APPLICATIONS (Cont.) PARTY-LINE BUS SYSTEM WITH MULTIPLE INPUTS, OUTPUTS, AND RECEIVERS IfuPuT & TOAUOTRKER BU TFESS OUTPUT 4 Ol T FROM PORTS 1 p Data aus 5 aq K = I | G | GUTFUT PoAT HO. 8 4 | CONTROL Lt : 7 LooH 2 . 4 | | ROL MENE foot 4 INPUT ro PORTS Dare BUS S {input Fort J CONTROL LIC-470 L _ LIC-471 Metallization and Pad Layouts Am548/74S240 Am548/74$242 Am54S/748241 Am54S/748243 Am54S/74S244 vec 14 iG 3 2G" 1G 1 13.20 At 2 1T ova 3 11 8A 2A4 wa24 2v35 Ww? 1 74 2a3 1a3 6 2v2 7 W3 9 Bay 242 144 8 14 2 54ay 2y1 9 2al DIE SIZE 0.077" X 0.124" DIE SIZE 0.077" X 0.124" 4-146