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| TECHNICAL DATA IN74HCT125A Quad 3-State Noninverting Buffers High-Performance Silicon-Gate CMOS The IN74HCT125A is identical in pinout to the LS/ALS125. The IN74HCT125A may be used as a level converter for interfacing TTL or NMOS outputs to High Speed CMOS inputs. The IN74HCT125A noninverting buffers are designed to be used with 3-state memory address drivers, clock drivers, and other busoriented systems. The devices have four separate output enables that are active-low. * TTL/NMOS Compatible Input Levels * Outputs Directly Interface to CMOS, NMOS, and TTL * Operating Voltage Range: 4.5 to 5.5 V * Low Input Current: 1.0 A ORDERING INFORMATION IN74HCT125AN Plastic IN74HCT125AD SOIC TA = -55 to 125 C for all packages LOGIC DIAGRAM PIN ASSIGNMENT FUNCTION TABLE Inputs PIN 14 =VCC PIN 7 = GND A H L X OE L L H Output Y H L Z X = don't care Z = high impedance 123 IN74HCT125A MAXIMUM RATINGS* Symbol VCC VIN VOUT IIN IOUT ICC PD Tstg TL * Parameter DC Supply Voltage (Referenced to GND) DC Input Voltage (Referenced to GND) DC Output Voltage (Referenced to GND) DC Input Current, per Pin DC Output Current, per Pin DC Supply Current, VCC and GND Pins Power Dissipation in Still Air, Plastic DIP+ SOIC Package+ Storage Temperature Lead Temperature, 1 mm from Case for 10 Seconds (Plastic DIP or SOIC Package) Value -0.5 to +7.0 -1.5 to VCC +1.5 -0.5 to VCC +0.5 20 35 75 750 500 -65 to +150 260 Unit V V V mA mA mA mW C C Maximum Ratings are those values beyond which damage to the device may occur. Functional operation should be restricted to the Recommended Operating Conditions. +Derating - Plastic DIP: - 10 mW/C from 65 to 125C SOIC Package: : - 7 mW/C from 65 to 125C RECOMMENDED OPERATING CONDITIONS Symbol VCC VIN, VOUT TA tr, tf Parameter DC Supply Voltage (Referenced to GND) DC Input Voltage, Output Voltage (Referenced to GND) Operating Temperature, All Package Types Input Rise and Fall Time (Figure 1) Min 4.5 0 -55 0 Max 5.5 VCC +125 500 Unit V V C ns This device contains protection circuitry to guard against damage due to high static voltages or electric fields. However, precautions must be taken to avoid applications of any voltage higher than maximum rated voltages to this high-impedance circuit. For proper operation, VIN and VOUT should be constrained to the range GND(VIN or VOUT)VCC. Unused inputs must always be tied to an appropriate logic voltage level (e.g., either GND or VCC). Unused outputs must be left open. 124 IN74HCT125A DC ELECTRICAL CHARACTERISTICS(Voltages Referenced to GND) VCC Symbol Parameter Test Conditions V Guaranteed Limit 25 C to -55C 2.0 2.0 0.8 0.8 4.4 5.4 3.98 0.1 0.1 0.26 0.1 0.5 85 C 2.0 2.0 0.8 0.8 4.4 5.4 3.84 0.1 0.1 0.33 1.0 5.0 125 C 2.0 2.0 0.8 0.8 4.4 5.4 3.7 0.1 0.1 0.4 1.0 10 A A V Unit VIH VIL VOH Minimum High-Level Input Voltage Maximum Low Level Input Voltage Minimum High-Level Output Voltage VOUT= VCC-0.1 V IOUT 20 A VOUT=0.1 V IOUT 20 A VIN=VIH IOUT 20 A VIN=VIH IOUT 6.0 mA 4.5 5.5 4.5 5.5 4.5 5.5 4.5 4.5 5.5 4.5 5.5 5.5 V V V VOL Maximum Low-Level Output Voltage VIN=VIL IOUT 20 A VIN=VIL IOUT 6.0 mA IIN IOZ Maximum Input Leakage Current Maximum ThreeState Leakage Current Maximum Quiescent Supply Current (per Package) Additional Quiescent Supply Current VIN=VCC or GND Output in High-Impedance State VIN=VIL or VIH VIN=VCC or GND VIN=VCC or GND IOUT=0A VIN = 2.4 V, Any One Input VIN=VCC or GND, Other Inputs IOUT=0A ICC 5.5 4.0 40 160 A ICC -55C 25C to 125C 2.4 mA 5.5 2.9 125 IN74HCT125A AC ELECTRICAL CHARACTERISTICS(VCC=5.0 V 10%, CL=50pF,Input tr=tf=6.0 ns) Guaranteed Limit Symbol Parameter 25 C to -55C 18 24 18 12 10 15 85C 125C Unit tPLH, tPHL tPLZ, tPHZ tPZL, tPZH tTLH, tTHL CIN COUT Maximum Propagation Delay, Input A to Output Y (Figures 1 and 3) Maximum Propagation Delay, Output Enable toY (Figures 2 and 4) Maximum Propagation Delay, Output Enable toY (Figures 2 and 4) Maximum Output Transition Time, Any Output (Figures 1 and 3) Maximum Input Capacitance Maximum Three-State Output Capacitance (Output in High-Impedance State) Power Dissipation Capacitance (Per Buffer) 23 30 23 15 10 15 27 36 27 18 10 15 ns ns ns ns pF pF Typical @25C,VCC=5.0 V 48 pF CPD Used to determine the no-load dynamic power consumption: PD=CPDVCC2f+ICCVCC Figure 1. Switching Waveforms Figure 2. Switching Waveforms 126 IN74HCT125A Figure 3. Test Circuit Figure 4. Test Circuit EXPANDED LOGIC DIAGRAM (1/4 of the Device) 127 |
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