CD74HC238E (74HC238)
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Description:
The CD74HC238E features three binary-coded inputs (A, B, and C) and eight active-low outputs (Y0 to Y7). Depending on the combination of inputs, one of the eight outputs is selected and driven low while the remaining outputs remain high. This IC operates at high speed with minimal power consumption, making it suitable for various digital logic circuits where efficient address decoding and selection are required.
Key Features:
- 3-to-8 line decoder/demultiplexer
- High-speed CMOS technology
- Low power consumption
- Wide operating voltage range: 2V to 6V
- Typical propagation delay: 21 ns at VCC = 5V, CL = 15 pF
- High output drive capability: ±5.2 mA at VCC = 5V
- Active-low outputs for direct interface with TTL logic
- Schmitt-trigger action on all inputs for improved noise immunity
- Package Type: 16-pin DIP (Dual In-line Package)
- Supply Voltage (VCC): 2V to 6V
- Input Voltage (VIN): 0V to VCC
- Output Voltage (VOUT): 0V to VCC
- Input High Voltage (VIH): 3.15V (min) at VCC = 6V
- Input Low Voltage (VIL): 1.35V (max) at VCC = 6V
- Output Current (IO): ±5.2 mA (max)
- Quiescent Supply Current (ICC): 4 µA (max)
- Operating Temperature Range: -55°C to +125°C
- Address decoding in microprocessor systems
- Memory selection in digital systems
- Control logic circuits
- Signal routing and multiplexing
- Microcontroller interfacing
Technical Specifications:
- Logic Family: CMOS
- Number of Channels: 3
- Switch Configuration: Single-Pole Double-Throw (SPDT)
- Supply Voltage Range: 3V to 15V
- “ON” Resistance (R_ON): 125Ω typical at V_DD = 10V
- “OFF” Leakage Current (I_OFF): ±100pA typical at V_DD = 10V
- Control Input Voltage (V_IH): 0.7 V_DD min, 0.3 V_DD max
- Maximum Operating Frequency: 40 MHz at V_DD = 10V
Applications:
- Signal routing and switching
- Analog and digital multiplexing
- Audio and video signal processing
- Data acquisition systems
- Test equipment