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CD74HC138 Datasheet(PDF) 5 Page - Texas Instruments |
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CD74HC138 Datasheet(HTML) 5 Page - Texas Instruments |
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5 / 7 page 
5 HCT TYPES High Level Input Voltage VIH - - 4.5 to 5.5 2- - 2 - 2 - V Low Level Input Voltage VIL - - 4.5 to 5.5 - - 0.8 - 0.8 - 0.8 V High Level Output Voltage CMOS Loads VOH VIH or VIL -0.02 4.5 4.4 - - 4.4 - 4.4 - V High Level Output Voltage TTL Loads -4 4.5 3.98 - - 3.84 - 3.7 - V Low Level Output Voltage CMOS Loads VOL VIH or VIL 0.02 4.5 - - 0.1 - 0.1 - 0.1 V Low Level Output Voltage TTL Loads 4 4.5 - - 0.26 - 0.33 - 0.4 V Input Leakage Current II VCC and GND 0 5.5 - ±0.1 - ±1- ±1 µA Quiescent Device Current ICC VCC or GND 0 5.5 - - 8 - 80 - 160 µA Additional Quiescent Device Current Per Input Pin: 1 Unit Load (Note 4) ∆ICC VCC -2.1 - 4.5 to 5.5 - 100 360 - 450 - 490 µA NOTE: 4. For dual-supply systems theoretical worst case (VI = 2.4V, VCC = 5.5V) specification is 1.8mA. DC Electrical Specifications (Continued) PARAMETER SYMBOL TEST CONDITIONS VCC (V) 25oC -40oC TO 85oC -55oCTO125oC UNITS VI (V) IO (mA) MIN TYP MAX MIN MAX MIN MAX HCT Input Loading Table INPUT UNIT LOADS A0-A2 1.5 E1, E2 1.25 E3 1 NOTE: Unit Load is ∆ICC limit specified in DC Electrical Table, e.g., 360 µA max at 25oC. Switching Specifications Input tr, tf = 6ns PARAMETER SYMBOL TEST CONDITIONS VCC (V) 25oC -40oC TO 85oC -55oC TO 125oC UNITS MIN TYP MAX MIN MAX MIN MAX HC TYPES Propagation Delay tPLH, tPHL CL = 50pF 2 - - 150 - 190 - 225 ns Address to Output 4.5 - - 30 - 38 - 45 ns CL = 15pF 5 - 13 - - - - - ns CL = 50pF 6 - - 26 - 33 - 38 ns CD74HC138, CD74HCT138, CD74HC238, CD74HCT238 |
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