M74HC238 Datasheet PDF | STMicroelectronics

STMicroelectronics M74HC238

The M54/74HC238 is a high speed CMOS 3 to 8 line 2 decoder fabricated in silicon gate C MOS technology. It has the same high speed performance of LSTTL combined with true CMOS low power consumption.

Part No.	M74HC238
Datasheet	M74HC238 Download
Manufacturer	STMicroelectronics
Description	3 TO 8 LINE DECODER
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DESCRIPTION

If the device is enabled, 3 binary select inputs (A, B and C) determine which one of outputs will go high. Enable input G1 is held ”Low” or either G2A or G2B is held ”High” decoding function is inhibited and all the 8 outputs go low. Three enable inputs are provided to ease cascade connection and application of this address decoder in memory systems. All inputs are equipped with protection circuits against static discharge and transient excess voltage. NC = No Internal Connection October 1993 1/10 M54/M74HC238 INPUT AND OUTPUT EQUIVALENT CIRCUIT PIN

DESCRIPTION

PIN No 1, 2, 3 4, 5 6 15, 14, 13, 12, 11, 10, 9, 7 8 16 SYMBOL A, B, C G2A G2B G1 Y0 to Y7 NAME AND FUNCTION Data Inputs Enable Input (Active LOW) Data Enable Input (Active HIGH) Outputs GND VCC Ground (0V) Positive Supply Voltage IEC LOGIC SYMBOLS TRUTH TABLE INPUTS ENABLE G2B X X H L L L L L L L L G2A X H X L L L L L L L L G1 L X X H H H H H H H H C X X X L L L L H H H H SELECT B X X X L L H H L L H H A X X X L H L...