UNISONIC TECHNOLOGIES CO., LTD U74AHC373 CMOS IC OCTAL TRANSPARENT D-TYPE LATCHES WITH 3-STATE OUTPUTS DESCRIPTION The U74AHC373 is an octal transparent D-type latch with 3-state outputs, and it has 8 channels. When the OE input is low and the LE input is high, the Q outputs follow the D inputs. When OE is low and LE is low, the Q outputs are latched at the logic levels of the D inputs. When the OE input is high, the outputs are in the high-impedance. The OE does not affect the internal operations of the latches. Old data can be retained or new data can be entered while the outputs are in the high-impedance state. 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 * Operate from 2V to 5.5V * Inputs Accept Voltages to 5.5V * Max tPD of 13.5ns at VCC=3.3V, CL=15pF * Typ VOL< 0.36V at VCC=3V, IOL=4mA, TA=25°C * Typ VOH> 2.58V at VCC=3V, IOH=-4mA, TA=25°C ORDERING INFORMATION Ordering Number U74AHC373G-R20-T U74AHC373G-P20-R Package SSOP-20 TSSOP-20 Packing Tube Tape Reel MARKING www.unisonic.com.tw Copyright © 2015 Unisonic Technologies Co., Ltd 1 of 6 QW-R502-669.C U74AHC373 CMOS IC PIN CONFIGURATION 1 20 VCC 1Q 2 19 8Q 1D 3 18 8D 2D 4 17 7D 2Q 5 16 7Q 3Q 6 15 6Q 3D 7 14 6D 4D 8 13 5D 4Q 9 12 5Q GND 10 11 LE OE FUNCTION TABLE INPUTS( OE ) INPUTS(LE) INPUTS(D) L H H L H L L L X H X X Note: H: HIGH voltage level; L: LOW voltage level. LOGIC SYMBOL LOGIC DIAGRAM UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw OUTPUT(Q) H L Q0 Z 2 of 6 QW-R502-669.C U74AHC373 CMOS IC ABSOLUTE MAXIMUM RATING PARAMETER SYMBOL RATINGS UNIT Supply voltage VCC -0.5 ~ 7 V Input voltage (Note 2) VI -0.5 ~ 7 V Output voltage (Note 2) VO -0.5 ~ VCC +0.5 V Input clamp current IIK -20 mA Output clamp current IOK ±20 mA Output current IO ±25 mA VCC or GND current ICC ±75 mA Storage temperature TSTG -65 ~ +150 ℃ 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 SYMBOL VCC High-Level Input Voltage VIH Low-Level Input Voltage VIL Input Voltage Output Voltage IOH Low-Level Output Current IOL VCC = 2 V VCC = 3 V VCC = 5.5V VCC = 2 V VCC = 3 V VCC = 5.5V VIN VOUT High-Level Output Current Input Rise or Fall Times TEST CONDITIONS tR, tF MIN 2 1.5 2.1 3.85 TYP MAX 5.5 UNIT V V 0.5 0.9 1.65 5.5 VCC -50 -4 -8 50 4 8 100 20 0 0 VCC = 2 V VCC = 3.3 V ± 0.3 V VCC = 5 V ± 0.5 V VCC = 2 V VCC = 3.3 V ± 0.3 V VCC = 5 V ± 0.5 V VCC = 3.3 V ± 0.3 V VCC = 5 V ± 0.5 V V V V μA mA μA mA ns/V ELECTRICAL CHARACTERISTICS (TA=25°C) PARAMETER Output Voltage High-Level Output Voltage Low-Level Input Leakage Current Leakage Current (For output in high-impedance state) SYMBOL VOH VOL II(LEAK) IOZ Quiescent Supply Current IQ Input Capacitance Output Capacitance CI CO TEST CONDITIONS VCC=2V, IOH=-50μA VCC=3V, IOH=-50μA VCC=4.5V, IOH=-50μA VCC=3V, IOH=-4mA VCC=4.5V, IOH=-8mA VCC=2V, IOL=50μA VCC=3V, IOL=50μA VCC=4.5V, IOL=50μA VCC=3V, IOL=4mA VCC=4.5V, IOL=8mA VCC=0V to 5.5V, VIN=0 or 5.5V VCC=5.5V, VIN=VIH or VIH, VOUT=0 or 5.5V VCC=5.5V, VIN=VCC or GND, IOUT=0 VCC=5V, VIN=VCC or GND VCC=5V, VOUT=VCC or GND UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw MIN 1.9 2.9 4.4 2.58 3.94 TYP MAX UNIT V 4 6 0.1 0.1 0.1 0.36 0.36 ±0.1 μA ±0.25 μA 4 μA 10 pF pF V 3 of 6 QW-R502-669.C U74AHC373 CMOS IC SWITCHING CHARACTERISTICS PARAMETER SYMBOL From D to Q tPLH/tPHL From LE to Q From OE to Q tPZL/tPZH From OE to Q tPLZ/tPHZ Pulse Width, LE high tW Setup Time, data before LE↓ tSU Hold Time, data after LE↓ tH TEST CONDITIONS VCC=3.3V±0.3V, CL=15pF VCC=3.3V±0.3V, CL=50pF VCC=5V±0.5V, CL=15pF VCC=5V±0.5V, CL=50pF VCC=3.3V±0.3V, CL=15pF VCC=3.3V±0.3V, CL=50pF VCC=5V±0.5V, CL=15pF VCC=5V±0.5V, CL=50pF VCC=3.3V±0.3V, CL=15pF VCC=3.3V±0.3V, CL=50pF VCC=5V±0.5V, CL=15pF VCC=5V±0.5V, CL=50pF VCC=3.3V±0.3V, CL=15pF VCC=3.3V±0.3V, CL=50pF VCC=5V±0.5V, CL=15pF VCC=5V±0.5V, CL=50pF VCC=3.3V±0.3V VCC=5V±0.5V VCC=3.3V±0.3V VCC=5V±0.5V VCC=3.3V±0.3V VCC=5V±0.5V MIN TYP 7.3 9.8 5 6.5 7 9.5 4.9 6.4 7.3 9.8 5.5 7 7 9.5 5 6.5 5 5 4 4 1 1 MAX 11.4 14.9 7.2 9.2 11 14.5 7.2 9.2 11.4 14.9 8.1 10.1 10 13.2 7.2 9.2 UNIT ns ns ns ns ns ns OPERATING CHARACTERISTICS (TA=25°С) PARAMETER Power Dissipation Capacitance SYMBOL TEST CONDITIONS CPD No load, f=1MHz UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw RATINGS 18 UNIT pF 4 of 6 QW-R502-669.C U74AHC373 CMOS IC TEST CIRCUIT AND WAVEFORMS TEST tPLH/tPHL tPLZ/tPZL tPHZ/tPZH VCC Input VM VLOAD ≤3ns VCC/2 VCC ≤3ns VCC/2 VCC VIN tR, tF 3.3V±0.3V VCC 5V±0.5V VCC UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw CL 15pF 50pF 15pF 50pF S1 Open VLOAD GND RL V∆ 1kΩ 0.3V 1kΩ 0.5V 5 of 6 QW-R502-669.C U74AHC373 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. 2. PRR ≤1MHz, ZO = 50Ω, tR ≤3ns, tF ≤3ns. 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-R502-669.C