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| 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 (74AC/VHC/HC/F/ALS/LS etc.) 244 type TC74LCX244FK Weight SOP20-P-300-1.27A TSSOP20-P-0044-0.65A VSSOP20-P-0030-0.50 : 0.22 g (typ.) : 0.08 g (typ.) : 0.03 g (typ.) 1 2007-10-19 TC74LCX244F/FT/FK Pin Assignment (top view) IEC Logic Symbol 1 2 4 6 8 1OE 1A1 2Y4 1A2 2Y3 1A3 2Y2 1A4 2Y1 1 2 3 4 5 6 7 8 9 20 19 18 17 16 15 14 VCC 1OE EN 18 16 14 12 1Y1 1Y2 1Y3 1Y4 2OE 1Y1 2A4 1Y2 1A1 1A2 1A3 1A4 2OE 2A3 19 11 13 15 17 EN 9 7 5 3 2Y1 2Y2 2Y3 2Y4 1Y3 2A2 1Y4 2A1 13 12 11 2A1 2A2 2A3 2A4 GND 10 Truth Table Inputs OE L L H An L H X Outputs L H Z X: Don't care Z: High impedance Absolute Maximum Ratings (Note 1) Characteristics Power supply voltage DC input voltage DC output voltage Input diode current Output diode current DC output current Power dissipation DC VCC/ground current Storage temperature Symbol VCC VIN VOUT IIK IOK IOUT PD ICC/IGND Tstg Rating -0.5 to 7.0 -0.5 to 7.0 -0.5 to 7.0 (Note 2) -0.5 to VCC + 0.5 (Note 3) -50 50 50 180 100 -65 to 150 (Note 4) mA mA mA mW mA C V Unit V V 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 Power supply voltage Input voltage Output voltage Symbol VCC VIN VOUT Rating 2.0 to 3.6 1.5 to 3.6 (Note 2) 0 to 5.5 0 to 5.5 (Note 3) 0 to VCC (Note 4) 24 12 -40 to 85 Unit V V V Output current Operating temperature Input rise and fall time IOH/IOL Topr dt/dv (Note 5) (Note 6) mA C 0 to 10 (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 85C) Characteristics H-level L-level Symbol VIH VIL Test Condition VCC (V) 2.7 to 3.6 2.7 to 3.6 Min 2.0 Max Unit Input voltage V 0.8 IOH = -100 A H-level VOH VIN = VIH or VIL IOH = -12 mA IOH = -18 mA Output voltage IOH = -24 mA IOL = 100 A L-level VOL VIN = VIH or VIL IOL = 12 mA IOL = 16 mA IOL = 24 mA Input leakage current 3-state output off-state current Power off leakage current Quiescent supply current Increase in ICC per input IIN IOZ IOFF ICC ICC 2.7 to 3.6 2.7 3.0 3.0 2.7 to 3.6 2.7 3.0 3.0 2.7 to 3.6 2.7 to 3.6 0 2.7 to 3.6 2.7 to 3.6 2.7 to 3.6 VCC - 0.2 2.2 2.4 2.2 V 0.2 0.4 0.4 0.55 5.0 5.0 A A A VIN = 0 to 5.5 V VIN = VIH or VIL VOUT = 0 to 5.5 V VIN/VOUT = 5.5 V VIN = VCC or GND VIN/VOUT = 3.6 to 5.5 V VIH = VCC - 0.6 10.0 10.0 10.0 A 500 3 2007-10-19 TC74LCX244F/FT/FK AC Characteristics (Ta = -40 to 85C) Characteristics Symbol tpLH tpHL tpZL tpZH tpLZ tpHZ tosLH tosHL Test Condition VCC (V) 2.7 3.3 0.3 2.7 3.3 0.3 2.7 3.3 0.3 (Note) 2.7 3.3 0.3 Min Max 7.5 6.5 9.0 8.0 8.0 7.0 Unit Propagation delay time Figure 1, Figure 2 1.5 ns Output enable time Figure 1, Figure 3 1.5 ns Output disable time Figure 1, Figure 3 1.5 ns Output to output skew 1.0 ns Note: Parameter guaranteed by design. (tosLH = |tpLHm - tpLHn|, tosHL = |tpHLm - tpHLn|) Dynamic Switching Characteristics (Ta = 25C, input: tr = tf = 2.5 ns, CL = 50 pF, RL = 500 ) Characteristics Quiet output maximum dynamic VOL Quiet output minimum dynamic VOL Symbol VOLP |VOLV| Test Condition VIH = 3.3 V, VIL = 0 V VIH = 3.3 V, VIL = 0 V VCC (V) 3.3 3.3 Typ. 0.8 0.8 Unit V V Capacitive Characteristics (Ta = 25C) Characteristics Input capacitance Output capacitance Power dissipation capacitance Symbol CIN COUT CPD fIN = 10 MHz Test Condition VCC (V) 3.3 3.3 (Note) 3.3 Typ. 7 8 25 Unit pF pF pF 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) = CPDVCCfIN + ICC/8 (per bit) 4 2007-10-19 TC74LCX244F/FT/FK AC Test Circuit Open 6.0 V GND Measure CL RL Switch RL Parameter tpLH, tpHL tpLZ, tpZL tpHZ, tpZH Switch Open 6.0 V GND Output CL = 50 pF RL = 500 Figure 1 AC Waveform tr 2.5 ns Input (A) tf 2.5 ns 90% 1.5 V 10% 2.7 V GND VOH 1.5 V tpLH tpHL VOL Output (Y) Figure 2 tpLH, tpHL tr 2.5 ns Output Enable ( OE ) tpLZ Output (Y) Low to Off to Low tpHZ Output (Y) High to Off to High Outputs enabled tf 2.5 ns 90% 1.5 V 10% tpZL 3.0 V 1.5 V VOL + 0.3 V VOH - 0.3 V tpZH VOL VOH 1.5 V GND Outputs disabled Outputs enabled 2.7 V GND 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 * The information contained herein is subject to change without notice. 20070701-EN GENERAL * 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 |
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