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| TECHNICAL DATA IN74HCT373A Octal 3-State Noninverting Transparent Latch High-Performance Silicon-Gate CMOS The IN74HCT373A may be used as a level converter for interfacing TTL or NMOS outputs to High-Speed CMOS inputs. The IN74HCT373A is identical in pinout to the LS/ALS373. The eight latches of the IN74HCT373A are transparent D-type latches. While the Latch Enable is high the Q outputs follow the Data Inputs. When Latch Enable is taken low, data meeting the setup and hold times becomes latched. The Output Enable does not affect the state of the latch, but when Output Enable is high, all outputs are forced to the high-impedance state. Thus, data may be latched even when the outputs are not enabled. * 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 IN74HCT373AN Plastic IN74HCT373ADW SOIC TA = -55 to 125 C for all packages PIN ASSIGNMENT LOGIC DIAGRAM FUNCTION TABLE Inputs Output Enable L PIN 20=VCC PIN 10 = GND L L H Latch Enable H H L X D H L X X Output Q H L No Change Z X = Don't Care Z = High Impedance 371 IN74HCT373A 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. 372 IN74HCT373A 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=0.1 V or VCC-0.1 V IOUT 20 A VOUT=0.1 V or VCC-0.1 V IOUT 20 A VIN=VIH or VIL IOUT 20 A VIN=VIH or VIL 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 or VIH IOUT 20 A VIN= VIL or VIH 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 VOUT=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 2.9 373 IN74HCT373A AC ELECTRICAL CHARACTERISTICS(VCC =5.0 V 10%, CL=50pF,Input tr=tf=6.0 ns) Guaranteed Limit Symbol Parameter 25 C to -55C 28 32 30 35 12 10 15 85C 125C Unit tPLH, tPHL tPLH, tPHL tPLZ, tPHZ tPZL, tPZH tTLH, tTHL CIN COUT Maximum Propagation Delay, Input D to Q (Figures 1 and 5) Maximum Propagation Delay , Latch Enable to Q (Figures 2 and 5) Maximum Propagation Delay ,Output Enable to Q (Figures 3 and 6) Maximum Propagation Delay , Output Enable to Q (Figures 3 and 6) Maximum Output Transition Time, Any Output (Figures 1 and 5) Maximum Input Capacitance Maximum Three-State Output Capacitance (Output in High-Impedance State) Power Dissipation Capacitance (Per Latch) 35 40 38 44 15 10 15 42 48 45 53 18 10 15 ns ns ns ns ns pF pF Typical @25C,VCC=5.0 V 65 pF CPD Used to determine the no-load dynamic power consumption: PD=CPDVCC2f+ICCVCC TIMING REQUIREMENTS (VCC =5.0 V 10%, CL=50pF,Input tr=tf=6.0 ns) Guaranteed Limit Symbol tSU Parameter Minimum Setup Time, Input D to Latch Enable (Figure 4) Minimum Hold Time,Latch Enable to Input D (Figure 4) Minimum Pulse Width, Latch Enable (Figure 2) Maximum Input Rise and Fall Times (Figure 1) 25 C to -55C 10 85C 13 125C 15 Unit ns th 10 13 15 ns tw tr, tf 12 500 15 500 18 500 ns ns 374 IN74HCT373A Figure 1. Switching Waveforms Figure 2. Switching Waveforms Figure 3. Switching Waveforms Figure 4. Switching Waveforms Figure 5. Test Circuit Figure 6. Test Circuit EXPANDED LOGIC DIAGRAM 375 |
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