TOSHIBA Octal Bus Buffer TC74HC7240 Inverted, 3-State Outputs TC74HC7241 Non-Inverted, 3-State Outputs TC74HC7244 Non-Inverted, 3-State Outputs The TC74HC240A, 241A AND 244A are high speed CMOS OCTAL BUS BUFFERs fabricated with silicon gate CMOS technology. They achieve the high speed operation similar to equivalent LSTTL while maintaining the CMOS low power dissipation. The TC74HC? 240A/7241A/7244A have same pin con- figuration and function as the TC74HC240A/241A/244A. And they have a hysteresis characteristics with each input, so TC74HC7240A/7241A/7 244A can be used as a line receiver, etc. The 74HC7 240A is an inverting 3-state buffer having two active low output enables. The TC74HC7241A and HC7244A are non-inverting 3-state buffers that differ only in that the 7241A has one active-high and one active-low output enable, and the HC7244A has two active-low output enables. All inputs are equipped with protection circuits against static discharge or transient excess voltage. Features High Speed: thy = 15ns(Typ.) at Voc = 5V Low Power Dissipation: leg = 4uA(Max.) at Ta = 25C High Noise Immunity: Vai = 1.1V(Typ.) at Veg = 5V * Output Drive Capability: 15 LSTTL Loads TC74HC7240AP/AF TC74HC7241AP/AF TC74HC7244AP/AF F * Symmetrical Output Impedance: Iloy! = lo, = BMA(Min.) * Balanced Propagation Delays: ty, = toa Wide Operating Voltage Range: Vec(opr) = 2V ~ 6V * Pin and Function Compatible with 74LS240/241/244 TC74HC7240A 16 1 1A1 2 C Ba <p 1} 20 Vee [19 2G 26 3 1a2 4] 2v3 5 ax r} 18 11 [17 24 w3 6 RaNaw OO on ry 16 12 15 203 v2 70 1a4 8 [] J [}14 13 [}13 202 2719] GND 10[] [12 14 Qa Pit 2a1 Truth Table Inputs Outputs G 64 A, Y, y,44 L H L L H L H H H L H L x Z 2 A: for TG74HC7241A, 244A AA: for TC74HC7240A only X: Dont Care Z: High Impedance TC74HC7241A TC74HC7244A 1K" D2 vee 1610 120 Vee wi 2C n\ p< 2 wi 20] nh pep 6 zva 3 \) ry 18 v1 eve 3] [18 11 1A2 ee Rea 17 2a4 1024 ge Re 17 2M4 2v3 5 [] [) 16 1v2 2v3 50 [) 16 12 waa o CESK RAs ons tas 6 GE REL 1s 20s v2 70 \] isis = ave 7 ry 14 13 ia a PHF 13 2a2 ia 8 a F193 2a2 avi 9] izive =o avi 9 G Py 12 14 env 10( yi 201s pn 10] Ty 11 2a TOSHIBA AMERICA ELECTRONIC COMPONENTS, INC. 771TC74HC7240AP/AF*TC74HC7241 AP/AF TC74HC7244AP/AF C2MOS Logic TC74HC/HCT Series TC74HC7240A TC74HC7241A TC74HC7244A - _ 6 =x 1G = = 772 1A1 az v1 1A2 12 143 13 1A4 14 26 2at 21 2Aa2 272 203 23 2A4 2a 16 1At 1A2 1A3 1A4 a 11 12 13 14 26 evi 2v2 2N3 2a 2A1 2A2 IEC Logic Symbol 1A1 Tt v vt 12 43 14 2v1 2v2 2Y3 2v4 TOSHIBA AMERICA ELECTRONIC COMPONENTS, INC.TC74HC7240AP/AF*TC74HC7241 AP/AF c?mos Logic TC74HC/HCT Series TC74HC7244AP/AF Absolute Maximum Ratings Parameter Symbol Value Unit Supply Voltage Range Voc -05~7 V DC Input Voltage Vin 0.5 ~ Vo +05 V DC Output Voltage Vout 0.5 ~ Veg + 0.5 V Input Diode Current I #20 mA Output Diode Current lox 420 mA DC Output Current lour 5 mA DC Voc /Ground Current leo 40 mA Power Dissipation Pp 500(DIP)*/180(SOIC) mW Storage Temperature Tytg -65 ~ 150 C Lead Temperature 10sec Tr 300 C *500mW in the range of Ta = -40C ~ 65C. From Ta = 65C to 85C a derating factor of -10mWA/C shall be applied until 300mW. Recommended Operating Conditions Parameter Symbol Value Unit Supply Voltage Voc 2~6 V Input Voltage Vin 0-Voo v Output Voltage Vour 0-Voo Vv Operating Temperature Toor -40 ~ 85 C DC Electrical Characteristics Ta = 25C Ta = -40 ~ 85C Parameter Symbol Test Condition Unit Voce | Min. Typ. Max. Min Max. a: 2.0 1.0 1.25 1.5 10 15 foative Threshold Vp - 45 | 23 27 3.15 23 3.15 v onage 60 | 35 35 42 3.0 42 . 2.0 0.3 0.65 0.9 03 09 wae Threshold Wy - 45} 1.28 16 20 1.13 20 v onage so | 15 23 26 15 26 Hysteresis 20 0.3 0.6 1.0 0.3 10 Vo Vu - 45 0.6 1 14 06 14 V nage 60 | a8 12 17 08 17 2.0 19 2.0 - 19 - lon=-20nA | 45 44 45 - 44 - High-Level v Vin= 6.0 59 6.0 - 5.9 - V Output Voltage OH Vy OF Vy. lon=-6MA | 45 4.18 431 - 413 - lon=78mA | 6.0 | 5.68 5.80 - 5.63 - 2.0 - 0.0 01 - 01 lo. =20pA | 45 - 0.0 0.4 - 04 Low-Level Vy Vin = 6.0 - 0.0 04 - of v Output Voltage ot Vip OF Vy. lop=6mA | 45 - 0.17 0.26 - 0.33 lo.=7.8mA | 6.0 - 0.18 0.26 - 0.33 3-State Output Vin = Vig OF Vp _ _ _ Off-State Current loz Vout = Voc of GND 60 #05 #05 Input Leakage Current In Vin = Voc or GND 6.0 - - 0.1 - H.0 vA Quiescent Supply Current loo Vin = Voc or GND 6.0 - - 40 - 40.0 TOSHIBA AMERICA ELECTRONIC COMPONENTS, INC.TC74HC7240AP/AF*TC74HC7241 AP/AF TC74HC7244AP/AF C?MOS Logic TC74HC/HCT Series AC Electrical Characteristics (C, = 50pF, Input t, = t, = 6ns) Ta = 25C Ta = -40 ~ 85C Parameter Symbol Test Condition - Unit CL | Vee Min. Typ. Max. Min. Max. t 2.0 - 25 60 ~ 75 Output Transition Time a - 50 45 - 7 12 - 15 THL 6.0 ~ 6 10 - 13 2.0 - 50 125 - 155 50 45 - 15 25 - a 6.0 - 13 21 - 26 Propagation Delay Time tou ~ tou 20 - 87 165 - 205 150 45 - 20 33 - 41 6.0 - 17 28 - 35 ns 2.0 - 68 150 - 190 50 45 - 2i 30 - 38 . t 6.0 - 16 26 - 32 Output Enable Time pat R.=1kQ tom 20 - 84 165 - 230 150 45 - 26 37 - 46 6.0 ~ 20 31 - 39 \ 2.0 - 48 150 - 190 Output Disable Time PY R= 1kQ 50 45 - 21 30 - 38 pHZ 6.0 - 19 26 - 32 Input Capacitance Cin - - 5 10 - 10 Output Capacitance Cour - - 10 - - - oF a TC74HC7240A - 33 _ a _ Power Dissipation Capacitance Cop (1) TC74HC7241A/7244A - 34 - > - Note (1) Cpp is defined as the value of the internal equivalent capacitance which is calculated from the operating current consumption without load. Average operating current can be obtained by the equation: lecwopn = Cen * Voc * fin + loc/8(per bit) 774 TOSHIBA AMERICA ELECTRONIC COMPONENTS, INC.