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CD74HCT138 Datasheet(PDF) 1 Page - Texas Instruments |
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CD74HCT138 Datasheet(HTML) 1 Page - Texas Instruments |
1 / 7 page 1 Data sheet acquired from Harris Semiconductor SCHS147A Features • Select One Of Eight Data Outputs Active Low for 138, Active High for 238 • l/O Port or Memory Selector • Three Enable Inputs to Simplify Cascading • Typical Propagation Delay of 13ns at VCC = 5V, CL = 15pF, TA = 25 oC • Fanout (Over Temperature Range) - Standard Outputs . . . . . . . . . . . . . . . 10 LSTTL Loads - Bus Driver Outputs . . . . . . . . . . . . . 15 LSTTL Loads • Wide Operating Temperature Range . . . -55oC to 125oC • Balanced Propagation Delay and Transition Times • Significant Power Reduction Compared to LSTTL Logic ICs • HC Types - 2V to 6V Operation - High Noise Immunity: NIL = 30%, NIH = 30% of VCC at VCC = 5V • HCT Types - 4.5V to 5.5V Operation - Direct LSTTL Input Logic Compatibility, VIL= 0.8V (Max), VIH = 2V (Min) - CMOS Input Compatibility, Il ≤ 1µA at VOL, VOH Pinout CD74HC138, CD74HCT138, CD74HC238, CD74HCT238 (PDIP, SOIC) TOP VIEW Signal names in parentheses are for ’HC238 and ’HCT238. 14 15 16 9 13 12 11 10 1 2 3 4 5 7 6 8 A0 A1 A2 E1 E2 E3 GND (Y7) Y7 VCC Y1 (Y1) Y2 (Y2) Y3 (Y3) Y4 (Y4) Y5 (Y5) Y6 (Y6) Y0 (Y0) October 1997 - Revised February 1999 CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper IC Handling Procedures. Copyright © 1999, Texas Instruments Incorporated CD74HC138, CD74HCT138, CD74HC238, CD74HCT238 High Speed CMOS Logic 3-to-8 Line Decoder/ Demultiplexer Inverting and Non-Inverting [ /Title (CD74 HC138 , CD74 HCT13 8, CD74 HC238 , CD74 HCT23 8) /Sub- ject (High Speed |
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