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| TC74LCX240F/FW/FT TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic TC74LCX240F,TC74LCX240FW,TC74LCX240FT Low-Voltage Octal Bus Buffer (inverted) with 5-V Tolerant Inputs and Outputs The TC74LCX240F/FW/FT 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 74LCX240F/FW/FT is an 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. Note: xxxFW (JEDEC SOP) is not available in Japan. TC74LCX240F TC74LCX240FW 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 JEDEC SOP, JEITA SOP and TSSOP Power-down protection provided on all inputs and outputs Pin and function compatible with the 74 series (74AC/VHC/HC/F/ALS/LS etc.) 240 type TC74LCX240FT Weight SOP20-P-300-1.27: 0.22 g (typ.) SOL20-P-300-1.27: 0.46 g (typ.) TSSOP20-P-0044-0.65: 0.08 g (typ.) 1 2002-01-11 TC74LCX240F/FW/FT Pin Assignment (top view) IEC Logic Symbol 1OE 1 2 4 6 8 1OE 1 2 3 4 5 6 7 8 9 20 19 18 17 16 15 14 13 12 11 VCC 2OE EN 18 16 14 12 1Y1 1Y 2 1A1 2Y 4 1Y1 1A2 2Y3 2A4 1Y 2 1A1 1A2 1A3 1A4 1Y 3 1Y 4 2OE 1A3 2Y 2 19 11 13 15 17 EN 9 7 5 3 2 Y1 2Y 2 2Y3 2Y 4 2A3 1Y 3 1A4 2 Y1 2A2 1Y 4 2A1 2A2 2A3 2A4 GND 10 2A1 Truth Table Inputs OE Outputs An L H X H L Z L L H X: Don't care Z: High impedance Maximum Ratings Characteristics Power supply voltage DC input voltage Symbol VCC VIN Rating -0.5 to 7.0 -0.5 to 7.0 -0.5 to 7.0 (Note 1) DC output voltage VOUT -0.5 to VCC + 0.5 (Note 2) Input diode current Output diode current DC output current Power dissipation DC VCC/ground current Storage temperature IIK IOK IOUT PD ICC/IGND Tstg -50 50 50 180 100 -65 to 150 (Note 3) mA mA mA mW mA C V Unit V V Note 1: Output in OFF state Note 2: High or low state. IOUT absolute maximum rating must be observed. Note 3: VOUT < GND, VOUT > VCC 2 2002-01-11 TC74LCX240F/FW/FT Recommended Operating Conditions Characteristics Power supply voltage Input voltage Output voltage Symbol VCC VIN VOUT Rating 2.0 to 3.6 1.5 to 3.6 (Note 4) 0 to 5.5 0 to 5.5 (Note 5) 0 to VCC (Note 6) 24 12 -40 to 85 Unit V V V Output current Operating temperature Input rise and fall time IOH/IOL Topr dt/dv (Note 7) (Note 8) mA C ns/V 0 to 10 (Note 9) Note 4: Data retention only Note 5: Output in OFF state Note 6: High or low state Note 7: VCC = 3.0 to 3.6 V Note 8: VCC = 2.7 to 3.0 V Note 9: 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) Input voltage 3/4 3/4 Min 2.7 to 3.6 2.7 to 3.6 2.0 3/4 Max 3/4 Unit V 0.8 3/4 3/4 3/4 3/4 IOH = -100 mA H-level VOH VIN = VIH or VIL IOH = -12 mA IOH = -18 mA Output voltage IOH = -24 mA IOL = 100 mA 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 DICC 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 3/4 3/4 3/4 3/4 3/4 3/4 3/4 3/4 3/4 3/4 V 0.2 0.4 0.4 0.55 5.0 5.0 mA mA mA 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 V 10.0 10.0 10.0 mA 500 3 2002-01-11 TC74LCX240F/FW/FT AC Characteristics (Ta = -40 to 85C) Characteristics Symbol tpLH tpHL Output enable time tpZL tpZH Output disable time tpLZ tpHZ Output to output skew tosLH tosHL (Note 10) Figure 1, Figure 3 Figure 1, Figure 3 Test Condition VCC (V) Propagation delay time Figure 1, Figure 2 2.7 3.3 0.3 2.7 3.3 0.3 2.7 3.3 0.3 2.7 3.3 0.3 3/4 Min Max 7.5 6.5 9.0 8.0 8.0 7.0 3/4 Unit ns 1.5 3/4 ns 1.5 3/4 ns 1.5 3/4 3/4 ns 1.0 Note 10: 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 W) Characteristics Quiet output maximum dynamic VOL Quiet output minimum dynamic VOL Symbol Test Condition VCC (V) VOLP |VOLV| VIH = 3.3 V, VIL = 0 V VIH = 3.3 V, VIL = 0 V 3.3 3.3 0.8 0.8 V V Typ. Unit Capacitive Characteristics (Ta = 25C) Characteristics Input capacitance Output capacitance Power dissipation capacitance Symbol CIN COUT CPD fIN = 10 MHz Test Condition VCC (V) 3/4 3/4 Typ. 3.3 3.3 (Note 11) 3.3 7 8 25 Unit pF pF pF Note 11: 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 2002-01-11 TC74LCX240F/FW/FT 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 W Figure 1 AC Waveform tf 2.5 ns Input (A) tr 2.5 ns 90% 1.5 V 10% 2.7 V GND Output (Y ) tpLH VOH 1.5 V tpHL VOL Figure 2 tpLH, tpHL tr 2.5 ns Output Enable ( OE ) tpLZ Output ( Y ) Low to Off to Low tpHZ tf 2.5 ns 90% 1.5 V 10% tpZL 3.0 V 1.5 V VOL + 0.3 V VOH - 0.3 V 1.5 V GND tpZH VOL VOH 2.7 V GND Output ( Y ) High to Off to High Outputs enabled Outputs disabled Outputs enabled Figure 3 tpLZ, tpHZ, tpZL, tpZH 5 2002-01-11 TC74LCX240F/FW/FT Package Dimensions Weight: 0.22 g (typ.) 6 2002-01-11 TC74LCX240F/FW/FT Package Dimensions Note: This package is not available in japan. Weight: 0.46 g (typ.) 7 2002-01-11 TC74LCX240F/FW/FT Package Dimensions Weight: 0.08 g (typ.) 8 2002-01-11 TC74LCX240F/FW/FT RESTRICTIONS ON PRODUCT USE 000707EBA * 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 this document shall be made at the customer's own risk. * The products described in this document are subject to the foreign exchange and foreign trade laws. * The information contained herein is presented only as a guide for the applications of our products. No responsibility is assumed by TOSHIBA CORPORATION for any infringements of intellectual property or other rights of the third parties which may result from its use. No license is granted by implication or otherwise under any intellectual property or other rights of TOSHIBA CORPORATION or others. * The information contained herein is subject to change without notice. 9 2002-01-11 |
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