TC74AC240,244P/F/ FT TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic TC74AC240P, TC74AC240F, TC74AC240FT TC74AC244P, TC74AC244F, TC74AC244FT Octal Bus Buffer TC74AC240P/F/FT TC74AC244P/F/FT Inverted, 3-State Outputs Non-Inverted, 3-State Outputs The TC74AC240 and 244 are advanced high speed CMOS OCTAL BUS BUFFERs fabricated with silicon gate and double-layer metal wiring C2MOS technology. They achieve the high speed operation similar to equivalent Bipolar Schottky TTL while maintaining the CMOS low power dissipation. The 74AC240 is an inverting 3-state buffer while the 74AC244 is non-inverting. Both devices have two active-low output enables. These devices are designed to be used in such applications as 3-state memory address drivers. All inputs are equipped with protection circuits against static discharge or transient excess voltage. TC74AC240P, TC74AC244P TC74AC240F, TC74AC244F TC74AC240FT, TC74AC244FT Features * High speed: tpd = 4.0 ns (typ.) at VCC = 5 V * Low power dissipation: ICC = 8 A (max) at Ta = 25C * High noise immunity: VNIH = VNIL = 28% VCC (min) * Symmetrical output impedance: |IOH| = IOL = 24 mA (min) * Capability of driving 50 transmission lines. Balanced propagation delays: tpLH - tpHL * Wide operating voltage range: VCC (opr) = 2 to 5.5 V * Pin and function compatible with 74F240/244 Weight DIP20-P-300-2.54A SOP20-P-300-1.27A TSSOP20-P-0044-0.65A : 1.30 g (typ.) : 0.22 g (typ.) : 0.08 g (typ.) Start of commercial production 1986-05 1 2014-03-01 TC74AC240,244P/F/ FT Pin Assignment TC74AC244 TC74AC240 1G 1 20 VCC 1G 1 20 VCC 1A1 2 19 2G 1A1 2 19 2G 3 18 1Y1 2Y4 3 18 1Y1 1A2 4 17 2A4 1A2 4 17 2A4 2Y3 5 16 1Y 2 2Y3 5 16 1Y2 1A3 6 15 2A3 1A3 6 15 2A3 2Y 2 7 14 1Y3 2Y2 7 14 1Y3 1A4 8 13 2A2 1A4 8 13 2A2 2Y1 9 12 1Y 4 2Y1 9 12 1Y4 GND 10 11 2A1 GND 10 11 2A1 2Y 4 (top view) (top view) IEC Logic Symbol TC74AC244 TC74AC240 1G 1A1 1A2 1A3 1A4 2G 2A1 2A2 2A3 2A4 (1) 1G EN (2) (4) (18) (16) (14) (6) (8) (19) (12) 1A1 1A2 1A3 1A4 1Y1 1Y 2 1Y3 1Y 4 2G EN (11) (13) (15) (17) (9) (7) (5) (3) 2A1 2A2 2A3 2A4 2Y1 2Y 2 2Y3 2Y 4 (1) EN (2) (4) (18) (16) (6) (8) (14) (12) (19) (11) (13) (15) (17) 1Y1 1Y2 1Y3 1Y4 EN (9) (7) (5) (3) 2Y1 2Y2 2Y3 2Y4 Truth Table Inputs Outputs G An Yn (244) Y n (240) L L L H L H H L H X Z Z X: Don't care Z: High impedance 2 2014-03-01 TC74AC240,244P/F/ FT Absolute Maximum Ratings (Note 1) Characteristics Symbol Rating Unit Supply voltage range VCC -0.5 to 7.0 V DC input voltage VIN -0.5 to VCC + 0.5 V VOUT -0.5 to VCC + 0.5 V Input diode current IIK 20 mA Output diode current IOK 50 mA DC output current IOUT 50 mA DC VCC/ground current ICC 200 mA Power dissipation PD 500 (DIP) (Note 2)/180 (SOP/TSSOP) mW Storage temperature Tstg -65 to 150 C DC output voltage Note 1: Exceeding any of the absolute maximum ratings, even briefly, lead to deterioration in IC performance or even destruction. Using continuously under heavy loads (e.g. the application of high temperature/current/voltage and the significant change in temperature, etc.) may cause this product to decrease in the reliability significantly even if the operating conditions (i.e. operating temperature/current/voltage, etc.) are within the absolute maximum ratings and the operating ranges. Please design the appropriate reliability upon reviewing the Toshiba Semiconductor Reliability Handbook ("Handling Precautions"/Derating Concept and Methods) and individual reliability data (i.e. reliability test report and estimated failure rate, etc). Note 2: 500 mW in the range of Ta = -40 to 65C. From Ta = 65 to 85C, a derating factor of -10 mW/C should be applied up to 300 mW. Operating Ranges (Note) Characteristics Symbol Rating Unit Supply voltage VCC 2.0 to 5.5 V Input voltage VIN 0 to VCC V VOUT 0 to VCC V Operating temperature Topr -40 to 85 C Input rise and fall time dt/dV Output voltage Note: 0 to 100 (VCC = 3.3 0.3 V) 0 to 20 (VCC = 5 0.5 V) ns/V The operating ranges must be maintained to ensure the normal operation of the device. Unused inputs must be tied to either VCC or GND. 3 2014-03-01 TC74AC240,244P/F/ FT Electrical Characteristics DC Characteristics Ta = -40 to 85C Ta = 25C Characteristics High-level input voltage Low-level input voltage High-level output voltage Symbol VIH VIL VOH Test Condition Typ. Max Min Max 2.0 1.50 1.50 3.0 2.10 2.10 5.5 3.85 3.85 2.0 0.50 0.50 3.0 0.90 0.90 5.5 1.65 1.65 2.0 1.9 2.0 1.9 3.0 2.9 3.0 2.9 VIN = VIH or IOH = -4 mA VIL 4.5 4.4 4.5 4.4 3.0 2.58 2.48 4.5 3.94 3.80 5.5 3.85 2.0 0.0 0.1 0.1 IOL = 50 A 3.0 0.0 0.1 0.1 VIN = VIH or IOL = 12 mA VIL 4.5 0.0 0.1 0.1 3.0 0.36 0.44 4.5 0.36 0.44 5.5 1.65 IOH = -75 mA VOL Min IOH = -50 A IOH = -24 mA Low-level output voltage VCC (V) (Note) IOL = 24 mA IOL = 75 mA (Note) Unit V V V V 3-state output off-state current IOZ VIN = VIH or VIL VOUT = VCC or GND 5.5 0.5 5.0 A Input leakage current IIN VIN = VCC or GND 5.5 0.1 1.0 A Quiescent supply current ICC VIN = VCC or GND 5.5 8.0 80.0 A Note: This spec indicates the capability of driving 50 transmission lines. One output should be tested at a time for a 10 ms maximum duration. 4 2014-03-01 TC74AC240,244P/F/ FT AC Characteristics (CL = 50 pF, RL = 500 , input: tr = tf = 3 ns) Characteristics Propagation delay time (Note 2) Propagation delay time (Note 3) Output enable time Output disable time Input capacitance Output capacitance Power dissipation capacitance Symbol tpLH tpHL tpLH tpHL tpZL tpZH tpLZ tpHZ Ta = -40 to 85C Ta = 25C Test Condition VCC (V) Min Typ. Max Min Max 3.3 0.3 6.3 10.5 1.0 12.0 5.0 0.5 4.8 7.0 1.0 8.0 3.3 0.3 7.0 11.4 1.0 13.0 5.0 0.5 5.2 7.5 1.0 8.5 3.3 0.3 8.4 14.0 1.0 16.0 5.0 0.5 5.9 8.7 1.0 10.0 3.3 0.3 6.4 10.5 1.0 12.0 5.0 0.5 5.5 7.9 1.0 9.0 Unit ns ns ns ns CIN 5 10 10 pF COUT 10 pF 30 pF CPD (Note 1) Note 1: CPD 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: ICC (opr) = CPD*VCC*fIN + ICC/8 (per bit) Note 2: For TC74AC240 only Note 3: For TC74AC244 only 5 2014-03-01 TC74AC240,244P/F/ FT Package Dimensions Weight: 1.30 g (typ.) 6 2014-03-01 TC74AC240,244P/F/ FT Package Dimensions Weight: 0.22 g (typ.) 7 2014-03-01 TC74AC240,244P/F/ FT Package Dimensions Weight: 0.08 g (typ.) 8 2014-03-01 TC74AC240,244P/F/ FT RESTRICTIONS ON PRODUCT USE * Toshiba Corporation, and its subsidiaries and affiliates (collectively "TOSHIBA"), reserve the right to make changes to the information in this document, and related hardware, software and systems (collectively "Product") without notice. * This document and any information herein may not be reproduced without prior written permission from TOSHIBA. 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