UNISONIC TECHNOLOGIES CO., LTD U74HC148 CMOS IC 8-LINE TO 3-LINE PRIORITY ENCODERS DESCRIPTION The UTC U74HC148 devices encode eight data lines to 3-line binary (octal). It feature priority decoding of the inputs to ensure that only the highest-order data line is encoded. (enable input EI and enable output EO) have been provided to allow octal expansion without the need for external circuitry. Data inputs and outputs are active at the low logic level. SOP-16 FEATURES * Wide supply voltage range from 2.0V to 6.0V * Low static power consumption; ICC=8μA (Max.) * Encode Eight Data Lines to 3-Line Binary (Octal) * High Noise Immunity ORDERING INFORMATION Ordering Number U74HC148G-P16-R Package TSSOP-16 Packing Tape Reel MARKING www.unisonic.com.tw Copyright © 2016 Unisonic Technologies Co., Ltd 1 of 6 QW-R126-045.A U74HC148 PIN CONFIGURATION FUNCTION TABLE INPUTS EI 0 1 2 3 4 5 6 H X X X X X X X L H H H H H H H L X X X X X X X L X X X X X X L L X X X X X L H L X X X X L H H L X X X L H H H L X X L H H H H L X L H H H H H L L H H H H H H Note: H: High voltage level; L: Low voltage level; X: Don’t care UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw CMOS IC 7 X H L H H H H H H H A2 H H L L L L H H H H A1 H H L L H H L L H H OUTPUTS A0 H H L H L H L H L H GS H H L L L L L L L L EO H L H H H H H H H H 2 of 6 QW-R126-045.A U74HC148 CMOS IC LOGIC DIAGRAM (positive logic) UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 3 of 6 QW-R126-045.A U74HC148 CMOS IC ABSOLUTE MAXIMUM RATING PARAMETER SYMBOL CONDITIONS RATINGS UNIT Supply Voltage VCC -0.5 ~ +7.0 V Input Voltage VIN -0.5 ~ VCC+0.5 V Output Voltage VOUT Active Mode -0.5 ~ VCC+0.5 V Continuous VCC or GND ICC ±50 mA Current Continuous Output Current IOUT VOUT=0V ~ VCC ±25 mA Input Clamp Current (Note 2) IIK VIN<0V or VIN>VCC ±20 mA Output Clamp Current IOK VOUT>VCC or VOUT<0V ±20 mA (Note 2) Storage Temperature Range TSTG -65 ~ +150 °C Notes: 1. Absolute maximum ratings are those values beyond which the device could be permanently damaged. Absolute maximum ratings are stress ratings only and functional device operation is not implied. 2. The input and output voltage ratings may be exceeded if the input and output current ratings are observed. RECOMMENDED OPERATING CONDITIONS PARAMETER Supply Voltage Input Voltage Output Voltage Operating Temperature Input Transition Rise or Fall Rate SYMBOL VCC VIN VOUT TA ∆t/∆v TEST CONDITIONS MIN 2.0 0 0 -40 TYP 5.0 VCC=2.0V VCC=4.5V VCC=6.0V MAX 6.0 VCC VCC 85 1000 500 400 UNIT V V V °C ns ns ns MAX UNIT V V V V V V V V V ELECTRICAL CHARACTERISTICS (TA =25°C , unless otherwise specified) PARAMETER SYMBOL High-level Input Voltage VIH Low-level Input Voltage VIL High-Level Output Voltage Low-Level Output Voltage Input Leakage Current VOH VOL II(LEAK) Quiescent Supply Current ICC Input Capacitance CI TEST CONDITIONS VCC=2.0V VCC=4.5V VCC=6.0V VCC=2.0V VCC=4.5V VCC=6.0V VCC=2.0V VIN=VIH or VIL VCC=4.5V IOH=-20μA VCC=6.0V VCC=4.5V, VIN=VIH or VIL, IOH=-4mA VCC=6.0V, VIN=VIH or VIL, IOH=-5.2mA VCC=2.0V VIN=VIH or VIL VCC=4.5V IOH=20μA VCC=6.0V VCC=4.5V, VIN=VIH or VIL, IOH=4mA VCC=6.0V, VIN=VIH or VIL, IOH=5.2mA VCC=6.0V, VIN= VCC or GND VCC=6.0V, VIN=VCC or GND, IOUT=0A VCC=2.0~6.0V, VIN=VCC or GND UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw MIN 1.5 3.15 4.2 TYP 0.5 1.35 1.8 1.9 4.4 5.9 1.998 4.498 5.998 3.98 V 5.48 V 0.002 0.001 0.001 3 0.1 0.1 0.1 0.26 V V V V 0.26 V ±0.1 μA 8 μA 10 pF 4 of 6 QW-R126-045.A U74HC148 CMOS IC SWITCHING CHARACTERISTICS (CL=50pF, TA =25°C , unless otherwise specified) PARAMETER SYMBOL Propagation delay from input (1-7) to output(A0~A2) Propagation delay from input (0-7) to output(EO) Propagation delay from input (0-7) to output(GS) tPD Propagation delay from input (EI) to output(A0~A2) Propagation delay from input (EI) to output(GS) Propagation delay from input (EI) to output(EO) Propagation delay to output(Any) tt TEST CONDITIONS VCC=2.0V VCC=4.5V VCC=6.0V VCC=2.0V VCC=4.5V VCC=6.0V VCC=2.0V VCC=4.5V VCC=6.0V VCC=2.0V VCC=4.5V VCC=6.0V VCC=2.0V VCC=4.5V VCC=6.0V VCC=2.0V VCC=4.5V VCC=6.0V VCC=2.0V VCC=4.5V VCC=6.0V MIN TYP 69 23 21 60 20 17 75 25 21 78 26 22 57 19 16 66 22 19 28 8 6 MAX 180 36 31 150 30 26 190 38 32 195 39 33 145 29 25 166 33 28 75 15 13 UNIT ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns TYP MAX UNIT OPERATING CHARACTERISTICS (TA =25°C , unless otherwise specified) PARAMETER Power Dissipation Capacitance SYMBOL CPD TEST CONDITIONS No load. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw MIN 35 pF 5 of 6 QW-R126-045.A U74HC148 CMOS IC TEST CIRCUIT AND WAVEFORMS Note: CL includes probe and jig capacitance. CL=50pF Notes: 1. CL includes probe and jig capacitance. 2. All input pulses are supplied by generators having the following characteristics: PRR ≤10MHz, ZO = 50Ω. UTC assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all UTC products described or contained herein. UTC products are not designed for use in life support appliances, devices or systems where malfunction of these products can be reasonably expected to result in personal injury. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 6 of 6 QW-R126-045.A