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| TC74LCX16244FT TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic TC74LCX16244FT Low-Voltage 16-Bit Bus Buffer with 5-V Tolerant Inputs and Outputs The TC74LCX16244FT is a high-performance CMOS 16-bit bus buffer. Designed for use in 2.5-V or 3.3-V systems, it achieves high-speed operation while maintaining the CMOS low power dissipation. The device is designed for low-voltage (2.5-V or 3.3-V) VCC applications, but it could be used to interface to 5 V supply environment for both inputs and outputs. This device is non-inverting 3-state buffer having four active-low output enables. It can be used as four 4-bit buffers two 8-bit buffers or one 16-bit buffer. When the OE input is high, the Weight: 0.25 g (typ.) outputs are in a high-impedance state. This device is designed to be used with 3-state memory address drivers, etc. All inputs are equipped with protection circuits against static discharge. Features * * * * * * Low-voltage operation: VCC = 2.0 to 3.6 V High-speed operation: tpd = 4.5 ns (max) (VCC = 3.0 to 3.6 V) Output current: |IOH|/IOL = 24 mA (min) (VCC = 3.0 V) Latch-up performance: 500 mA Package: TSSOP (thin shrink small outline package) Power-down protection provided on all inputs and outputs 1 2002-10-1 TC74LCX16244FT Pin Assignment (top view) IEC Logic Symbol 1 48 25 24 47 46 44 43 41 40 38 37 36 35 33 32 30 29 27 26 1OE 1 2 3 4 5 6 7 8 9 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 2OE 1OE 2OE 3OE 4OE 1Y1 1Y2 GND 1Y3 1Y4 VCC 2Y1 2Y2 1A1 1A2 GND 1A3 1A4 VCC 2A1 2A2 GND 2A3 2A4 3A1 3A2 GND 3A3 3A4 VCC 4A1 4A2 GND 4A3 4A4 3OE EN1 EN2 EN3 EN4 1 1 2 3 5 6 8 9 11 12 13 14 16 17 19 20 22 23 1Y1 1Y2 1Y3 1Y4 2Y1 2Y2 2Y3 2Y4 3Y1 3Y2 3Y3 3Y4 4Y1 4Y2 4Y3 4Y4 GND 10 2Y3 11 2Y4 12 3Y1 13 3Y2 14 GND 15 3Y3 16 3Y4 17 VCC 18 4Y1 19 4Y2 20 GND 21 4Y3 22 4Y4 23 4OE 1A1 1A2 1A3 1A4 2A1 2A2 2A3 2A4 3A1 3A2 3A3 3A4 4A1 4A2 4A3 4A4 1 2 1 3 1 4 24 2 2002-10-1 TC74LCX16244FT Truth Table Inputs 1OE System Diagram Outputs 1Y1-1Y4 L H Z 1A1-1A4 2A1-2A4 1Y1-1Y4 2Y1-2Y4 3Y1-3Y4 4Y1-4Y4 3A1-3A4 4A1-4A4 1/4 1OE 2OE 3OE 4OE 1A1-1A4 L H X L L H Inputs 2OE Outputs 2Y1-2Y4 L H Z 2A1-2A4 L H X L L H Inputs 3OE Outputs 3Y1-3Y4 L H Z 3A1-3A4 L H X L L H Inputs 4OE Outputs 4Y1-4Y4 L H Z 4A1-4A4 L H X L L H X: Don't care Z: High impedance 3 2002-10-1 TC74LCX16244FT Maximum Ratings Characteristics Power supply voltage Input voltage Output voltage Input diode current Output diode current DC output current Power dissipation DC VCC/ground current per supply pin Storage temperature Symbol VCC VIN VOUT IIK IOK IOUT PD ICC/IGND Tstg Rating -0.5 to 6.0 -0.5 to 7.0 -0.5 to 7.0 (Note 1) -0.5 to VCC + 0.5 (Note 2) -50 50 50 400 100 -65 to 150 (Note 3) Unit V V V mA mA mA mW mA C 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 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) V 0 to VCC (Note 6) 24 Output current IOH/IOL 12 8 Operating temperature Input rise and fall time Topr dt/dv -40 to 85 0 to 10 (Note 10) (Note 7) (Note 8) (Note 9) C ns/V mA V Unit V 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: VCC = 2.3 to 2.7 V Note 10: VIN = 0.8 to 2.0 V, VCC = 3.0 V 4 2002-10-1 TC74LCX16244FT Electrical Characteristics DC Characteristics (Ta = -40 to 85C) Characteristics Symbol Test Condition VCC (V) H-level Input voltage L-level VIL 3/4 IOH = -100 mA IOH = -8 mA H-level VOH VIN = VIH or VIL IOH = -12 mA IOH = -18 mA Output voltage IOH = -24 mA IOL = 100 mA IOL = 8 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 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 VIH 3/4 2.3 to 2.7 2.7 to 3.6 2.3 to 2.7 2.7 to 3.6 2.3 to 3.6 2.3 2.7 3.0 3.0 2.3 to 3.6 2.3 2.7 3.0 3.0 2.3 to 3.6 2.3 to 3.6 0 2.3 to 3.6 2.3 to 3.6 2.3 to 3.6 1.7 2.0 3/4 3/4 VCC -0.2 1.8 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 3/4 3/4 3/4 0.7 0.8 3/4 3/4 3/4 3/4 3/4 0.2 0.6 0.4 0.4 0.55 5.0 5.0 10.0 20.0 20.0 500 mA mA mA mA V V Min Max Unit AC Characteristics (Ta = -40 to 85C) Characteristics Symbol tpLH Propagation delay time tpHL Figure 1, Figure 2 Test Condition VCC (V) 2.5 0.2 2.7 3.3 0.3 2.5 0.2 Figure 1, Figure 3 2.7 3.3 0.3 2.5 0.2 Figure 1, Figure 3 2.7 3.3 0.3 2.5 0.2 (Note 11) 2.7 3.3 0.3 CL(pF) 30 50 50 30 50 50 30 50 50 30 50 50 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 3/4 3/4 3/4 5.4 5.2 4.5 7.2 6.3 5.5 6.5 5.7 5.4 3/4 3/4 1.0 ns ns ns ns Min Max Unit 3-state output enable time tpZL tpZH tpLZ tpHZ tosLH tosHL 3-state output disable time Output to output skew Note 11: Parameter guaranteed by design. (tosLH = |tpLHm - tpLHn|, tosHL = |tpHLm - tpHLn|) 5 2002-10-1 TC74LCX16244FT Dynamic Switching Characteristics (Ta = 25C, input: tr = tf = 2.5 ns, RL = 500 W) Characteristics Quiet output maximum dynamic Quiet output minimum dynamic Symbol Test Condition VCC (V) VOL VOLP VIH = 2.5 V, VIL = 0 V, CL =30pF VIH = 3.3 V, VIL = 0 V, CL =50pF VIH = 2.5 V, VIL = 0 V, CL =30pF VIH = 3.3 V, VIL = 0 V, CL =50pF 2.5 3.3 2.5 3.3 0.6 0.8 0.6 V 0.8 V Typ. Unit VOL |VOLV| 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 (Note 12) 3.3 3.3 3.3 7 8 25 pF pF pF Typ. Unit Note 12: 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) = CPDVCCfIN + ICC/16 (per bit) AC Test Circuit Switch RL 6.0 V or VCC 2 Open GND Measure CL RL Parameter tpLH, tpHL tpLZ, tpZL tpHZ, tpZH RL = 500 W 6.0 V VCC 2 Switch Open @VCC = 3.3 0.3 V @VCC = 2.5 0.2 V GND Output Figure 1 AC Waveform tr 2.5 ns Input (A) tf 2.5 ns 90% VM 10% VIH GND Output (Y) tpLH VOH VM tpHL VOL Figure 2 tpLH, tpHL 6 2002-10-1 TC74LCX16244FT tr 2.5 ns Output Enable ( OE ) tpLZ Output (Y) Low to Off to Low tpHZ tf 2.5 ns 90% VM 10% tpZL 3.0 V or Vcc VM VX tpZH VOL VOH VM GND Outputs enabled Outputs disabled Outputs enabled VIH GND Output (Y) High to Off to High VY Figure 3 tpLZ, tpHZ, tpZL, tpZH VCC Symbol VIH VM VX VY 3.3 0.3 V 2.7 V 1.5 V VOL + 0.3 V VOH - 0.3 V 2.7 V 2.7 V 1.5 V VOL + 0.3 V VOH - 0.3 V 2.5 0.2 V VCC VCC/2 VOL + 0.15 V VOH - 0.15 V 7 2002-10-1 TC74LCX16244FT Package Dimensions Weight: 0.25 g (typ.) 8 2002-10-1 TC74LCX16244FT 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 2002-10-1 |
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