SL74HCT245

SL74HCT245 Octal 3-State Noninverting Bus Transceiver High-Performance Silicon-Gate CMOS The SL74HCT245 is identical in pinout to the LS/ALS245.This device may be used as a level converter for interfacing TTL or NMOS outputs to High Speed CMOS inputs. The SL74HCT245 is a 3-state noninverting transceiver that is used for 2-way asynchronous communication between data buses. The device has an active-low Output Enable pin, which is used to place the I/O ports into high-impedance states. The Direction control determines whether data flows from A to B or from B to A. • 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 µA ORDERING INFORMATION SL74HCT245N Plastic SL74HCT245D SOIC TA = -55° to 125° C for all packages PIN ASSIGNMENT LOGIC DIAGRAM FUNCTION TABLE PIN 20=VCC PIN 10 = GND Control Inputs Output Enable L Direction L Operation Data Transmitted from Bus B to Bus A Data Transmitted from Bus A to Bus B Buses Isolated (High Impedance State) L H H X X = don’t care SLS System Logic Semiconductor SL74HCT245 MAXIMUM RATINGS * Symbol VCC VIN VOUT IIN IOUT ICC PD T stg 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 125°C SOIC Package: : - 7 mW/°C from 65° to 125°C RECOMMENDED OPERATING CONDITIONS Symbol VCC VIN, VOUT TA tr, t f 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 a nd 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 V ). CC Unused outputs must be left open. SLS System Logic Semiconductor SL74HCT245 DC ELECTRICAL CHARACTERISTICS (Voltages Referenced to GND) VCC Symbol Parameter Test Conditions V Guaranteed Limit 25 °C to -55°C 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 µA µA 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 µA VOUT=0.1 V or VCC-0.1 V IOUT ≤ 20 µA VIN=VIH or VIL IOUT ≤ 20 µA 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 µA VIN= VIL or VIH IOUT ≤ 6.0 mA IIN IOZ Maximum Input Leakage Current Maximum Three-State Leakage Current VIN=VCC or GND, Pin 1 or 19 Output in High-Impedance State VIN= VIL or VIH VOUT=VCC or GND, I/O Pins VIN=VCC or GND IOUT=0µA VIN=2.4 V, Any One Input VIN=VCC or GND, Other Inputs IOUT=0µA ICC Maximum Quiescent Supply Current (per Package) Additional Quiescent Supply Current 5.5 4.0 40 160 µA ∆ICC ≥-55°C 25°C to 125°C 2.4 mA 5.5 2.9 SLS System Logic Semiconductor SL74HCT245 AC ELECTRICAL CHARACTERISTICS (VCC =5.0 V ± 10%, CL=50pF,Input t r=t f=6.0 ns) Guaranteed Limit Symbol tPLH, t PHL tPLZ, t PHZ tPZL, t PZH tTLH, t THL CIN COUT Parameter Maximum Propagation Delay, A to B or B to A (Figures 1 and 3) Maximum Propagation Delay , Direction or Output Enable to A or B (Figures 2 and 4) Maximum Propagation Delay , Direction or Output Enable to A or B (Figures 2 and 4) Maximum Output Transition Time, Any Output (Figures 1 and 3) Maximum Input Capacitance (Pin 1 or Pin 19) Maximum Three-State I/O Capacitance (I/O in High-Impedance State) Power Dissipation Capacitance (Per Enable Output) CPD Used to determine the no-load dynamic power consumption: PD=CPDVCC2f+ICCVCC 25 °C to -55°C 22 32 30 12 10 15 ≤85°C 28 40 38 15 10 15 ≤125°C 33 48 45 18 10 15 Unit ns ns ns ns pF pF Typical @25°C,VCC=5.0 V 97 pF Figure 1. Switching Waveforms Figure 2. Switching Waveforms SLS System Logic Semiconductor SL74HCT245 Figure 3. Test Circuit Figure 4. Test Circuit EXPANDED LOGIC DIAGRAM SLS System Logic Semiconductor