TC74LCX244F/FT/FK TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic TC74LCX244F,TC74LCX244FT,TC74LCX244FK Low-Voltage Octal Bus Buffer with 5-V Tolerant Inputs and Outputs The TC74LCX244 is a high-performance CMOS octal bus buffer. Designed for use in 3.3-V systems, it achieves high-speed operation while maintaining the CMOS low power dissipation. The device is designed for low-voltage (3.3 V) VCC applications, but it could be used to interface to 5 V supply environment for both inputs and outputs. The 74LCX244F/FT is a non-inverting 3-state buffer having two active-low output enables. This device is designed to be used with 3-state memory address drivers, etc. All inputs are equipped with protection circuits against static discharge. TC74LCX244F TC74LCX244FT Features • Low-voltage operation: VCC = 2.0 to 3.6 V • High-speed operation: tpd = 6.5 ns (max) (VCC = 3.0 to 3.6 V) • Ouput current: |IOH|/IOL = 24 mA (min) (VCC = 3.0 V) • Latch-up performance: −500 mA • Available in JEITA SOP, TSSOP and VSSOP (US) • Power-down protection provided on all inputs and outputs • Pin and function compatible with the 74 series TC74LCX244FK (74AC/VHC/HC/F/ALS/LS etc.) 244 type Weight SOP20-P-300-1.27A TSSOP20-P-0044-0.65A VSSOP20-P-0030-0.50 1 : 0.22 g (typ.) : 0.08 g (typ.) : 0.03 g (typ.) 2007-10-19 TC74LCX244F/FT/FK Pin Assignment (top view) IEC Logic Symbol 1 20 VCC 1A1 2 19 2OE 2Y4 3 18 1Y1 1A2 4 17 2A4 2Y3 5 16 1Y2 1OE 1OE 1A1 1A2 1A3 1A4 2OE 1A3 6 15 2A3 2Y2 7 14 1Y3 1A4 8 13 2A2 2Y1 9 12 1Y4 GND 10 11 2A1 2A1 2A2 2A3 2A4 1 EN 2 4 6 8 19 18 16 14 12 1Y1 1Y2 1Y3 1Y4 EN 11 13 15 17 9 7 5 3 2Y1 2Y2 2Y3 2Y4 Truth Table Inputs OE An Outputs L L L L H H H X Z X: Don’t care Z: High impedance Absolute Maximum Ratings (Note 1) Characteristics Symbol Rating Unit Power supply voltage VCC −0.5 to 7.0 V DC input voltage VIN −0.5 to 7.0 V VOUT −0.5 to VCC + 0.5 −0.5 to 7.0 (Note 2) DC output voltage V (Note 3) Input diode current IIK −50 Output diode current IOK ±50 DC output current IOUT ±50 mA Power dissipation PD 180 mW ICC/IGND ±100 mA Tstg −65 to 150 °C DC VCC/ground current Storage temperature mA (Note 4) mA 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: Output in OFF state Note 3: High or low state. IOUT absolute maximum rating must be observed. Note 4: VOUT < GND, VOUT > VCC 2 2007-10-19 TC74LCX244F/FT/FK Operating Ranges (Note 1) Characteristics Symbol Power supply voltage VCC Input voltage VIN Output voltage VOUT Output current IOH/IOL Rating Unit 2.0 to 3.6 1.5 to 3.6 (Note 2) 0 to 5.5 V 0 to 5.5 (Note 3) 0 to VCC (Note 4) ±24 (Note 5) ±12 (Note 6) Operating temperature Topr −40 to 85 Input rise and fall time dt/dv 0 to 10 V V mA °C (Note 7) ns/V Note 1: The operating ranges must be maintained to ensure the normal operation of the device. Unused inputs must be tied to either VCC or GND. Note 2: Data retention only Note 3: Output in OFF state Note 4: High or low state Note 5: VCC = 3.0 to 3.6 V Note 6: VCC = 2.7 to 3.0 V Note 7: VIN = 0.8 to 2.0 V, VCC = 3.0 V Electrical Characteristics DC Characteristics (Ta = −40 to 85°C) Characteristics Input voltage Symbol Test Condition H-level VIH ⎯ L-level VIL ⎯ H-level VOH Min Max 2.7 to 3.6 2.0 ⎯ 2.7 to 3.6 ⎯ 0.8 IOH = −100 μA 2.7 to 3.6 VCC − 0.2 ⎯ IOH = −12 mA 2.7 2.2 ⎯ IOH = −18 mA 3.0 2.4 ⎯ IOH = −24 mA 3.0 2.2 ⎯ IOL = 100 μA 2.7 to 3.6 ⎯ 0.2 IOL = 12 mA 2.7 ⎯ 0.4 IOL = 16 mA 3.0 ⎯ 0.4 IOL = 24 mA 3.0 ⎯ 0.55 2.7 to 3.6 ⎯ ±5.0 μA 2.7 to 3.6 ⎯ ±5.0 μA VIN/VOUT = 5.5 V 0 ⎯ 10.0 μA VIN = VCC or GND 2.7 to 3.6 ⎯ 10.0 VIN/VOUT = 3.6 to 5.5 V 2.7 to 3.6 ⎯ ±10.0 VIH = VCC − 0.6 2.7 to 3.6 ⎯ 500 VIN = VIH or VIL Output voltage L-level VOL Input leakage current IIN 3-state output off-state current IOZ Power off leakage current IOFF Quiescent supply current ICC Increase in ICC per input ΔICC VIN = VIH or VIL VIN = 0 to 5.5 V VIN = VIH or VIL VOUT = 0 to 5.5 V 3 VCC (V) Unit V V μA 2007-10-19 TC74LCX244F/FT/FK AC Characteristics (Ta = −40 to 85°C) Characteristics Propagation delay time Output enable time Output disable time Output to output skew Note: Symbol tpLH tpHL tpZL tpZH tpLZ tpHZ Test Condition Figure 1, Figure 2 Figure 1, Figure 3 Figure 1, Figure 3 tosLH (Note) tosHL Min Max 2.7 ⎯ 7.5 3.3 ± 0.3 1.5 6.5 2.7 ⎯ 9.0 3.3 ± 0.3 1.5 8.0 2.7 ⎯ 8.0 3.3 ± 0.3 1.5 7.0 2.7 ⎯ ⎯ 3.3 ± 0.3 ⎯ 1.0 VCC (V) Unit ns ns ns ns Parameter guaranteed by design. (tosLH = |tpLHm − tpLHn|, tosHL = |tpHLm − tpHLn|) Dynamic Switching Characteristics (Ta = 25°C, input: tr = tf = 2.5 ns, CL = 50 pF, RL = 500 Ω) Characteristics Symbol Test Condition VCC (V) Typ. Unit Quiet output maximum dynamic VOL VOLP VIH = 3.3 V, VIL = 0 V 3.3 0.8 V Quiet output minimum dynamic VOL |VOLV| VIH = 3.3 V, VIL = 0 V 3.3 0.8 V Typ. Unit Capacitive Characteristics (Ta = 25°C) Characteristics Input capacitance Output capacitance Power dissipation capacitance Note: Symbol Test Condition CIN ⎯ 3.3 7 pF COUT ⎯ 3.3 8 pF 3.3 25 pF CPD fIN = 10 MHz VCC (V) (Note) CPD is defined as the value of the internal equivalent capacitance which is calculated from the operating current consumption. Average operating current can be obtained by the equation: ICC (opr) = CPD･VCC･fIN + ICC/8 (per bit) 4 2007-10-19 TC74LCX244F/FT/FK AC Test Circuit RL Switch RL Measure CL Output Open 6.0 V GND CL = 50 pF Parameter Switch tpLH, tpHL Open tpLZ, tpZL 6.0 V tpHZ, tpZH GND RL = 500 Ω Figure 1 AC Waveform tr 2.5 ns tf 2.5 ns 2.7 V 90% 1.5 V Input (A) 10% GND VOH Output (Y) 1.5 V VOL tpHL tpLH Figure 2 tpLH, tpHL tr 2.5 ns tf 2.5 ns 2.7 V 90% 1.5 V Output Enable ( OE ) 10% tpLZ GND tpZL 3.0 V Output (Y) Low to Off to Low 1.5 V tpHZ VOL + 0.3 V VOH − 0.3 V Output (Y) High to Off to High VOL tpZH VOH 1.5 V GND Outputs enabled Outputs disabled Outputs enabled Figure 3 tpLZ, tpHZ, tpZL, tpZH 5 2007-10-19 TC74LCX244F/FT/FK Package Dimensions Weight: 0.22 g (typ.) 6 2007-10-19 TC74LCX244F/FT/FK Package Dimensions Weight: 0.08 g (typ.) 7 2007-10-19 TC74LCX244F/FT/FK Package Dimensions Weight: 0.03 g (typ.) 8 2007-10-19 TC74LCX244F/FT/FK 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 2007-10-19