UNISONIC TECHNOLOGIES CO., LTD U74AHCT125 CMOS IC QUADRUPLE BUS BUFFER GATES WITH 3-STATE OUTPUTS DESCRIPTION The U74AHCT125 is a quadruple bus buffer gates with 3-state output. When OE is high, the Y output is in a high-impedance state. When OE is low, the device passes noninverted data from the A input to the Y output. To ensure the high-impedance state during power up or power down, OE should be tied to VCC through a pull-up resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver. FEATURES * TTL-Voltage Compatible * Max tPD of 3.8ns from A 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 U74AHCT125G-P14-R U74AHCT125G-S14-R Package TSSOP-14 SOP-14 Packing Tape Reel Tape Reel MARKING SOP-14 14 13 12 11 10 9 8 UTC AHCT125G 1 2 3 4 5 6 7 TSSOP-14 14 13 12 11 10 9 Date Code Lot Code www.unisonic.com.tw Copyright © 2015 Unisonic Technologies Co., Ltd 8 UTC AHCT125G 1 2 3 4 5 6 7 Date Code Lot Code 1 of 6 QW-R502-670.C U74AHCT125 CMOS IC PIN CONFIGURATION FUNCTION TABLE INPUTS OE A OUTPUTS Y L L H H L X H L Z LOGIC DIAGRAM OE A UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw Y 2 of 6 QW-R502-670.C U74AHCT125 CMOS IC ABSOLUTE MAXIMUM RATING PARAMETER SYMBOL RATINGS UNIT Supply Voltage VCC -0.5~7 V Input Voltage VIN -0.5~7 V Output Voltage 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 Transition Rise or Fall Rate Operating Temperature SYMBOL VCC VIH VIL VIN VOUT IOH IOL t/v 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 °C ELECTRICAL CHARACTERISTICS (TA =25°C , unless otherwise specified) PARAMETER SYMBOL High-Level Output Voltage VOH Low-Level Output Voltage VOL TEST CONDITIONS IOH = -50 μA, VCC = 4.5V IOH = -8 mA, VCC = 4.5V IOH = 50 μA, VCC = 4.5V IOH = 8 mA, VCC = 4.5V MIN TYP MAX UNIT 4.4 4.5 V 3.94 0.1 V 0.36 Input Leakage Current (A or OE input) II(LEAK) VIN = 5.5V or GND, VCC = 0 to 5.5V ±0.1 μA High-impedance state Current Quiescent Supply Current Additional quiescent supply current Input Capacitance Output Capacitance IOZ ICC ΔICC CIN COUT VOUT = VCC or GND, VCC = 5.5V VIN = VCC or GND, IOUT = 0, VCC = 5.5V ±0.25 2 1.35 10 μA μA mA pF pF One input at 3.4V,other inputs at VCC or GND VIN = VCC or GND, VCC=5V VOUT = VCC or GND, VCC=5V UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 4 15 3 of 6 QW-R502-670.C U74AHCT125 SWITCHING CHARACTERISTICS (VCC = 5V ± 0.5V, TA =25°C) PARAMETER Propagation Delay from Input A to Output Y, tPD Propagation Delay from Input OE to Output Y, tEN Propagation Delay from Input OE to Output Y, tDIS CMOS IC SYMBOL tPLH tPHL tPZH tPZL tPHZ tPLZ 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 3.8 5.3 3.8 5.3 3.6 5.1 3.6 5.1 4.6 6.1 4.6 6.1 MAX UNIT 5.5 ns 7.5 5.5 ns 7.5 5.1 ns 7.1 5.1 ns 7.1 6.8 ns 8.8 6.8 ns 8.8 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 14 UNIT pF 4 of 6 QW-R502-670.C U74AHCT125 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 V∆ VCC/2 VCC 15pF 50pF 1kΩ 0.5V UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 5 of 6 QW-R502-670.C U74AHCT125 CMOS IC TEST CIRCUIT AND WAVEFORMS(Cont.) VIN Input VM VM tPLH tPHL 0V VOH Output VM VM VOL tPLH tPHL VOH VM Output VM VOL Voltage Waveforms Propagation Delay Times Notes: 1. CL includes probe and jig capacitance. Notes: 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-R502-670.C