UNISONIC TECHNOLOGIES CO., LTD U74AHCT157 CMOS IC QUADRUPLE 2-LINE TO 1-LINE DATA SELECTOR/ MULTIPLEXER DESCRIPTION The U74AHCT157 is a quadruple 2-line to 1-line data selector/multiplexer. When G is high, all outputs are low. When G is low, a 4-bit word is selected from one of two sources and is routed to the four outputs. The devices provide true data. FEATURES * TTL-Voltage Compatible * Max tPD of 4.1ns from A or B to Y at 5V, CL=15pF * Low Quiescent Current: ICC = 2 μA (MAX) at 5.5V * ±8 mA output driver at 5V ORDERING INFORMATION Ordering Number Lead Free Halogen Free U74AHCT157L-P16-R U74AHCT157G-P16-R U74AHCT157L-P16-T U74AHCT157G-P16-T www.unisonic.com.tw Copyright © 2011 Unisonic Technologies Co., Ltd Package Packing TSSOP-16 TSSOP-16 Tape Reel Tube 1 of 6 QW-R502-652.A U74AHCT157 CMOS IC PIN CONFIGURATION FUNCTION TABLE INPUTS G H L L L L A/B X L L H H A B OUTPUTS Y X L H X X X X X L H L L H L H LOGIC DIAGRAM UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 2 of 6 QW-R502-652.A U74AHCT157 CMOS IC ABSOLUTE MAXIMUM RATING (TA =25°C ,unless otherwise specified) PARAMETER SYMBOL RATINGS UNIT Supply Voltage Range VCC -0.5~7 V Input Voltage Range VIN -0.5~7 V Output Voltage Range VOUT -0.5~VCC +0.5 V Input Clamp Current (VIN<0) IIK -20 mA Output Clamp Current (VOUT<0, or VOUT>VCC) IOK ±20 mA Output Current IOUT ±25 mA VCC or GND Current ICC ±50 mA Storage Temperature TSTG -65 ~ +150 °C Note: 1. The input and output voltage ratings may be exceeded if the input and output current ratings are observed. 2. 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. RECOMMENDED OPERATING COMDITIONS PARAMETER Supply Voltage High-Level Input Voltage Low-Level Input Voltage Input Voltage Output Voltage High-Level Output Current Low-Level Output Current Input Rise or Fall Times Operating Temperature SYMBOL VCC VIH VIL VIN VOUT IOH IOL Δt/Δv TA RATINGS 4.5 ~ 5.5 2 0.8 0 ~ 5.5 0 ~ VCC -8 8 20 -40 ~ 85 UNIT V V V V V mA mA ns/V ℃ ELECTRICAL CHARACTERISTICS (TA =25°C , unless otherwise specified) PARAMETER SYMBOL Output Voltage High-Level VOH Output Voltage Low-Level VOL Input Leakage Current Quiescent Supply Current II(LEAK) ICC Additional quiescent supply current ΔICC Input Capacitance CI TEST CONDITIONS VCC=4.5V, IOH=-50μA VCC=4.5V, IOH=-8mA VCC=4.5V, IOL=50μA VCC=4.5V, IOL=8mA VCC=0V to 5.5V, VIN=0 or 5.5V VCC=5.5V, VIN=VCC or GND, IOUT=0 VCC=5.5V, one input at 3.4V, Other inputs at VCC or GND VCC=5V, VIN=VCC or GND UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw MIN 4.4 3.94 TYP 4.5 2 MAX UNIT V 0.1 0.36 ±0.1 2 μA μA 1.35 mA 10 pF V 3 of 6 QW-R502-652.A U74AHCT157 SWITCHING CHARACTERISTICS (VCC = 5V ± 0.5V, TA =25°C) PARAMETER Propagation delay from input A or B to output Y, tPD Propagation delay from input A / B to output Y, tPD Propagation delay from input G to output Y, tPD CMOS IC SYMBOL tPLH tPHL tPLH tPHL tPLH tPHL TEST CONDITIONS CL=15pF, RL=1kΩ CL=50pF, RL=1kΩ CL=15pF, RL=1kΩ CL=50pF, RL=1kΩ CL=15pF, RL=1kΩ CL=50pF, RL=1kΩ CL=15pF, RL=1kΩ CL=50pF, RL=1kΩ CL=15pF, RL=1kΩ CL=50pF, RL=1kΩ CL=15pF, RL=1kΩ CL=50pF, RL=1kΩ MIN TYP 4.1 5.6 4.1 5.6 5.3 6.8 5.3 6.8 5.6 7.1 5.6 7.1 MAX 6.4 8.7 6.4 8.7 8.1 10.4 8.1 10.4 8.6 11 8.6 11 UNIT ns ns ns ns ns ns OPERATING CHARACTERISTICS (TA =25°C) PARAMETER Power dissipation capacitance SYMBOL TEST CONDITIONS CPD VCC = 5V, f=1MHz, No load UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw RATINGS 11 UNIT pF 4 of 6 QW-R502-652.A U74AHCT157 CMOS IC TEST CIRCUIT AND WAVEFORMS VCC 5V±0.5V Input VIN tR, tF VCC ≤3ns TEST tPLH/tPHL tPLZ/tPZL tPHZ/tPZH S1 Open VLOAD GND VM VLOAD CL RL VΔ VCC/2 VCC 15pF 50pF 1kΩ 0.5V UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 5 of 6 QW-R502-652.A U74AHCT157 CMOS IC TEST CIRCUIT AND WAVEFORMS(Cont.) Notes: 1. CL includes probe and jig capacitance. 2. All input pulses are supplied by generators having the following characteristics: PRR ≤1MHz, 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-R502-652.A