TC7MET138AFK TOSHIBA CMOS Didital Integrated Circuit Silicon Monolithic TC7MET138AFK 3-to-8 Line Decoder The TC7MET138AFK is an advanced high speed CMOS 3-to-8 line decoder fabricated with silicon gate C2MOS technology. It achieves the high speed operation similar to equivalent bipolar schottky TTL while maintaining the CMOS low power dissipation. 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. The input voltage are compatible with TTL output voltage. Weight: 0.02 g (typ.) This device may be used as a level converter for interfacing 3.3 V to 5 V system. Input protection and output circuit ensure that 0 to 5.5 V can be applied to the input and output (*) pins without regard to the supply voltage. These structure prevents device destruction due to mismatched supply and input/output voltages such as battery back up, hot board insertion, etc. *: VCC = 0 V Features • High speed: tpd = 7.6 ns (typ.) (VCC = 5 V) • Low power dissipation: ICC = 4 µA (max) (Ta = 25°C) • Compatible with TTL outputs: VIL = 0.8 V (max) VIH = 2.0 V (min) • Power down protection is provided on all inputs and outputs. • Balanced propagation delays: tpLH ≈ tpHL • Pin and function compatible with the 74 series (74AC/HC/ALS/LS etc.) 138 type. 1 2001-09-12 TC7MET138AFK Pin Assignment (top view) A 1 16 VCC B 2 15 Y0 C 3 14 Y1 G2A 4 13 Y2 G2B 5 12 Y3 G1 6 11 Y4 Y7 7 10 Y5 GND 8 9 Y6 IEC Logic Symbol A B C Bin/Oct (1) (2) (3) 1 2 4 0 1 2 3 4 5 6 7 ＆ G1 G2 A G2B (6) (4) (5) EN (15) (14) (13) (12) (11) (10) (9) (7) A B C Y0 Y1 Y2 (1) (2) (3) Dmux 0 2 0 1 2 3 4 5 6 7 0 G 7 Y3 ＆ Y4 G1 G2 A G2B Y5 Y6 Y7 (6) (4) (5) EN (15) (14) (13) (12) (11) (10) (9) (7) Y0 Y1 Y2 Y3 Y4 Y5 Y6 Y7 Truth Table Inputs Enable Outputs Selected Output Select Y0 Y1 Y2 Y3 Y4 Y5 Y6 Y7 G1 G2 A G 2B C B A L X X X X X H H H H H H H H None X H X X X X H H H H H H H H None X X H X X X H H H H H H H H None H L L L L L L H H H H H H H Y0 H L L L L H H L H H H H H H Y1 H L L L H L H H L H H H H H Y2 H L L L H H H H H L H H H H Y3 H L L H L L H H H H L H H H Y4 H L L H L H H H H H H L H H Y5 H L L H H L H H H H H H L H Y6 H L L H H H H H H H H H H L Y7 X: Don’t care 2 2001-09-12 TC7MET138AFK System Diagram 15 14 A 1 13 12 Select inputs B 2 11 10 C 3 9 7 G2 A Enable inputs G2B G1 4 Y0 Y1 Y2 Y3 Y4 Data outputs Y5 Y6 Y7 5 6 Maximum Ratings Characteristics Symbol Rating Unit Supply voltage range VCC −0.5~7.0 V DC input voltage VIN −0.5~7.0 V DC output voltage VOUT −0.5~7.0 −0.5~VCC + 0.5 (Note1) V (Note2) Input diode current IIK −20 Output diode current IOK ±20 DC output current IOUT ±25 mA DC VCC/ground current ICC ±75 mA Power dissipation PD 180 mW Storage temperature Tstg −65~150 °C mA (Note3) mA Note1: VCC = 0 V Note2: High or low state. IOUT absolute maximum rating must be observed. Note3: VOUT < GND, VOUT > VCC 3 2001-09-12 TC7MET138AFK Recommended Operating Conditions Characteristics Symbol Rating Unit Supply voltage VCC 4.5~5.5 V Input voltage VIN 0~5.5 V Output voltage 0~5.5 (Note4) 0~VCC (Note5) V VOUT Operating temperature Topr −40~85 °C Input rise and fall time dt/dv 0~20 ns/V Note4: VCC = 0 V Note5: High or low state. Electrical Characteristics DC Characteristics Characteristics Input voltage Symbol Ta = 25°C Test Condition Ta = −40~85°C VCC (V) Min Typ. Max Min Max Unit High level VIH 4.5~5.5 2.0 2.0 Low level VIL 4.5~5.5 0.8 0.8 4.4 4.5 4.4 VOH VIN = VIH IOH = −50 µA or VIL IOH = −8 mA 4.5 High level 4.5 3.94 3.80 4.5 0 0.1 0.1 VOL VIN = VIH IOL = 50 µA or VIL IOL = 8 mA 4.5 0.36 0.44 VIN = 5.5 V or GND 0~5.5 ±0.1 ±1.0 µA VIN = VCC or GND 5.5 4.0 40.0 µA 5.5 1.35 1.50 mA 0 0.5 5.0 µA Output voltage Low level Input leakage current IIN ICC Quiescent supply current ICCT Output leakage current IOPD Per input: VIN = 3.4 V V V Other input: VCC or GND VOUT = 5.5 V AC Characteristics (Input: tr = tf = 3 ns) Characteristics Symbol Ta = 25°C Test Condition VCC (V) CL (pF) Propagation delay time tpLH tpHL tpLH tpHL ( G2 - Y ) tpLH tpHL Input capacitance CIN Power dissipation capacitance CPD (A, B, C- Y ) Propagation delay time (G1- Y ) Propagation delay time 5.0 ± 0.5 5.0 ± 0.5 5.0 ± 0.5 Ta = −40~85°C Unit Min Typ. Max Min Max 15 7.6 10.4 1.0 12.0 50 8.1 11.4 1.0 13.0 15 6.6 9.1 1.0 10.5 50 7.1 10.1 1.0 11.5 15 7.0 9.6 1.0 11.0 50 7.5 10.6 1.0 12.0 4 10 10 pF 49 pF (Note6) ns ns ns Note6: 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) = CPD･VCC･fIN + ICC 4 2001-09-12 TC7MET138AFK Package Dimensions Weight: 0.02 g (typ.) 5 2001-09-12 TC7MET138AFK 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. 6 2001-09-12