SN74LS145N (74LS145) Decimal decoder

Description:

The SN74LS145N IC takes a 4-bit binary-coded input (BCD) and decodes it into one of ten outputs corresponding to the decimal values 0 through 9. It operates with a latch enable (LE) input that controls the data storage and a ripple-blanking (RB) input for suppressing false outputs due to momentary glitches. This IC is commonly used in applications where binary-coded data from digital systems needs to be converted into a form suitable for driving displays or other output devices.

Key Features:

• BCD to decimal decoding functionality
• Low-power Schottky TTL technology
• Wide operating voltage range: 4.75V to 5.25V
• Typical propagation delay: 21 ns at VCC = 5V, CL = 15 pF
• High output drive capability: ±8 mA at VCC = 5V
• Direct compatibility with TTL input levels
• Schmitt-trigger inputs for improved noise immunity

Technical Specifications:

• Package Type: 16-pin DIP (Dual In-line Package)
• Supply Voltage (VCC): 4.75V to 5.25V
• Input Voltage (VIN): 0V to VCC
• Output Voltage (VOUT): 0V to VCC
• Input High Voltage (VIH): 2V (min) at VCC = 5V
• Input Low Voltage (VIL): 0.8V (max) at VCC = 5V
• Output Current (IOH, IOL): ±8 mA (max)
• Quiescent Supply Current (ICC): 8 mA (max)
• Operating Temperature Range: 0°C to +70°C

Applications:

• BCD to decimal conversion in digital panel meters
• Seven-segment display decoding in digital clocks and calculators
• Signal decoding in electronic scoring systems
• Data decoding in digital control systems
• Binary data manipulation in microprocessor interfaces

Datasheet: For detailed technical information, refer to the SN74LS145N datasheet.