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 μA (max) at Ta = 25°C • High noise immunity: VNIH = VNIL = 28% VCC (min) • Symmetrical output impedance: |IOH| = IOL = 24 mA (min) • Capability of driving 50 Ω transmission lines. ∼ tpHL Balanced propagation delays: tpLH − • Wide operating voltage range: VCC (opr) = 2 to 5.5 V • Pin and function compatible with 74F240/244 1 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.) 2007-10-01 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 2007-10-01 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 65°C. From Ta = 65 to 85°C 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 2007-10-01 TC74AC240,244P/F/ FT Electrical Characteristics DC Characteristics Ta = −40 to 85°C Ta = 25°C 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 Unit V V 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 μA 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 5.5 ― ― ±0.5 ― ±5.0 μA IOH = −75 mA VOL Min IOH = −50 μA IOH = −24 mA Low-level output voltage VCC (V) (Note) IOL = 24 mA IOL = 75 mA (Note) VIN = VIH or VIL V V 3-state output off-state current IOZ Input leakage current IIN VIN = VCC or GND 5.5 ― ― ±0.1 ― ±1.0 μA Quiescent supply current ICC VIN = VCC or GND 5.5 ― ― 8.0 ― 80.0 μA Note: VOUT = VCC or GND This spec indicates the capability of driving 50 Ω transmission lines. One output should be tested at a time for a 10 ms maximum duration. 4 2007-10-01 TC74AC240,244P/F/ FT AC Characteristics (CL = 50 pF, RL = 500 Ω, 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 85°C Ta = 25°C 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 2007-10-01 TC74AC240,244P/F/ FT Package Dimensions Weight: 1.30 g (typ.) 6 2007-10-01 TC74AC240,244P/F/ FT Package Dimensions Weight: 0.22 g (typ.) 7 2007-10-01 TC74AC240,244P/F/ FT Package Dimensions Weight: 0.08 g (typ.) 8 2007-10-01 TC74AC240,244P/F/ FT RESTRICTIONS ON PRODUCT USE 20070701-EN GENERAL • The information contained herein is subject to change without notice. • TOSHIBA is continually working to improve the quality and reliability of its products. Nevertheless, semiconductor devices in general can malfunction or fail due to their inherent electrical sensitivity and vulnerability to physical stress. It is the responsibility of the buyer, when utilizing TOSHIBA products, to comply with the standards of safety in making a safe design for the entire system, and to avoid situations in which a malfunction or failure of such TOSHIBA products could cause loss of human life, bodily injury or damage to property. In developing your designs, please ensure that TOSHIBA products are used within specified operating ranges as set forth in the most recent TOSHIBA products specifications. Also, please keep in mind the precautions and conditions set forth in the “Handling Guide for Semiconductor Devices,” or “TOSHIBA Semiconductor Reliability Handbook” etc. • The TOSHIBA products listed in this document are intended for usage in general electronics applications (computer, personal equipment, office equipment, measuring equipment, industrial robotics, domestic appliances, etc.).These TOSHIBA products are neither intended nor warranted for usage in equipment that requires extraordinarily high quality and/or reliability or a malfunction or failure of which may cause loss of human life or bodily injury (“Unintended Usage”). Unintended Usage include atomic energy control instruments, airplane or spaceship instruments, transportation instruments, traffic signal instruments, combustion control instruments, medical instruments, all types of safety devices, etc.. Unintended Usage of TOSHIBA products listed in his document shall be made at the customer’s own risk. • The products described in this document shall not be used or embedded to any downstream products of which manufacture, use and/or sale are prohibited under any applicable laws and regulations. • The information contained herein is presented only as a guide for the applications of our products. No responsibility is assumed by TOSHIBA for any infringements of patents or other rights of the third parties which may result from its use. No license is granted by implication or otherwise under any patents or other rights of TOSHIBA or the third parties. • Please contact your sales representative for product-by-product details in this document regarding RoHS compatibility. Please use these products in this document in compliance with all applicable laws and regulations that regulate the inclusion or use of controlled substances. Toshiba assumes no liability for damage or losses occurring as a result of noncompliance with applicable laws and regulations. 9 2007-10-01