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| TC74LCX138F/FN/FT/FK TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic TC74LCX138F,TC74LCX138FN,TC74LCX138FT,TC74LCX138FK Low-Voltage 3-to-8 Line Decoder with 5-V Tolerant Inputs and Outputs The TC74LCX138 is a high-performance CMOS 3-to-8 decoder. 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 inputs. When the device is enabled, 3 binary select inputs (A, B and C) determine which one of the outputs ( Y0 - Y7 ) will go low. When enable input G1 is held low or either G2A or G2B is held high, decoding function is inhibited and all outputs go high. G1, G2A , and G2B inputs are provided to ease cascade connection and for use as an address decoder for memory systems. All inputs are equipped with protection circuits against static discharge. Note: xxxFN (JEDEC SOP) is not available in Japan. TC74LCX138F TC74LCX138FN Features * * * * * * * Low-voltage operation: VCC = 2.0 to 3.6 V High-speed operation: tpd = 6.0 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, 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.) 138 type TC74LCX138FK TC74LCX138FT Weight SOP16-P-300-1.27A SOL16-P-150-1.27 TSSOP16-P-0044-0.65A VSSOP16-P-0030-0.50 : 0.18 g (typ.) : 0.12 g (typ.) : 0.06 g (typ.) : 0.02 g (typ.) 1 2007-10-19 TC74LCX138F/FN/FT/FK Pin Assignment (top view) A B C G2A G 2B 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 VCC Y0 Y1 Y2 Y3 G1 Y7 GND Y4 Y5 Y6 IEC Logic Symbol Bin/Oct A B C G1 G2A G2B (1) (2) (3) (6) (4) (5) 1 2 4 & EN 0 1 2 3 4 5 6 7 (15) (14) (13) (12) (11) (10) (9) (7) Y0 Y1 Y2 Y3 A B C G1 G2A G2B (1) (2) (3) (6) (4) (5) 0 2 & Dmux 0 G 7 0 1 2 3 4 5 6 7 (15) (14) (13) (12) (11) (10) (9) (7) Y0 Y1 Y2 Y3 Y4 Y5 Y6 Y4 Y5 Y6 Y7 Y7 Truth Table Inputs Enable G1 G2 A Outputs Select G 2B X X H L L L L L L L L C X X X L L L L H H H H B X X X L L H H L L H H A X X X L H L H L H L H Y0 H H H L H H H H H H H Y1 H H H H L H H H H H H Y2 H H H H H L H H H H H Y3 H H H H H H L H H H H Y4 H H H H H H H L H H H Y5 H H H H H H H H L H H Y6 H H H H H H H H H L H Y7 H H H H H H H H H H L Selected Output L X X H H H H H H H H X H X L L L L L L L L None None None Y0 Y1 Y2 Y3 Y4 Y5 Y6 Y7 X: Don't care 2 2007-10-19 TC74LCX138F/FN/FT/FK System Diagram 15 14 13 12 11 10 9 7 Enable inputs G2 A G 2B Y0 Y1 Y2 A 1 Select inputs B 2 Y3 Y4 Data outputs C 3 Y5 Y6 Y7 4 5 6 G1 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 Unit V V V mA (Note 4) mA mA mW mA C 180 100 -65 to 150 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 range (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: VCC = 0 V Note 3: High or low state. IOUT absolute maximum rating must be observed. Note 4: VOUT < GND, VOUT > VCC 3 2007-10-19 TC74LCX138F/FN/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: VCC = 0 V 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 Power-off leakage current Quiescent supply current Increase in Icc per input IIN 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 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 A A VIN = 0 to 5.5 V VIN/VOUT = 5.5 V VIN = VCC or GND VIN = 3.6 to 5.5 V VIH = VCC - 0.6 V 10.0 10.0 10.0 A 500 4 2007-10-19 TC74LCX138F/FN/FT/FK AC Characteristics (Ta = -40 to 85C) Characteristics Propagation delay time (A, B, C- Y ) Propagation delay time (G1- Y ) Propagation delay time ( G2 - Y ) Output to output skew Symbol tpLH tpHL tpLH tpHL tpLH tpHL 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 7.0 6.0 8.0 7.0 7.0 6.0 Unit Figure 1, Figure 2 1.5 ns Figure 1, Figure 2 1.5 ns Figure 1, Figure 2 1.5 ns 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 0 (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 without load. Average operating current can be obtained by the equation: ICC (opr) = CPDVCCfIN + ICC 5 2007-10-19 TC74LCX138F/FN/FT/FK AC Test Circuit Output CL RL Measure CL = 50 pF RL = 500 Figure 1 AC Waveform tf 2.5 ns Input tr 2.5 ns 90% 1.5 V 10% 2.7 V GND VOH Output tpLH 1.5 V tpHL VOL Figure 2 tpLH, tpHL 6 2007-10-19 TC74LCX138F/FN/FT/FK Package Dimensions Weight: 0.18 g (typ.) 7 2007-10-19 TC74LCX138F/FN/FT/FK Package Dimensions (Note) Note: This package is not available in japan. Weight: 0.12 g (typ.) 8 2007-10-19 TC74LCX138F/FN/FT/FK Package Dimensions Weight: 0.06 g (typ.) 9 2007-10-19 TC74LCX138F/FN/FT/FK Package Dimensions Weight: 0.02 g (typ.) 10 2007-10-19 TC74LCX138F/FN/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. 11 2007-10-19 |
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