SN74LS145DR

These monolithic BCD-to-decimal decoder/drivers consist of eight inverters and ten four-input NAND gates. The inverters are connected in pairs to make BCD input data available for decoding by the NAND gates. Full decoding of valid BCD input logic ensures that all outputs remain off for all invalid binary input conditions. These decoders feature high-performance, n-p-n output transistors designed for use as indicator/relay drivers or as open-collector logic-circuit drivers. Each of the high-breakdown output transistors (15 volts) of the SN54145, SN74145, or SN74LS145 will sink up to 80 milliamperes of current. Each input is one Series 54/74 or Series 54LS/74LS standard load, respectively. Inputs and outputs are entirely compatible for use with TTL or DTL logic circuits, and the outputs are compatible for interfacing with most MOS integrated circuits. Power dissipation is typically 215 milliwatts for the '145 and 35 milliwatts for the 'LS145.

Applications

• BCD-to-decimal decoder
• Indicator lamp driver
• Relay driver
• MOS driver
• Open-collector logic circuit driver
• Interface connection between logic circuits

Key features

• Full decoding of input logic; all outputs remain off for all invalid binary input conditions
• SN54145, SN74145, SN74LS145 with 80mA sink current capability
• High-performance n-p-n open-collector output transistors with 15V output transistor breakdown voltage
• Typical power dissipation: 215mW for SN54145/SN74145, 35mW for SN74LS145
• Each input meets the corresponding Series 54/74 or Series 54LS/74LS standard load requirements
• Maximum supply voltage: 7V
• Maximum input voltage: 5.5V for non-LS versions, 7V for LS versions
• Maximum off-state output current: 1mA
• Operating free-air temperature range: -55℃ to 125℃ for SN54 series, 0℃ to 70℃ for SN74 series
• Storage temperature range: -65℃ to 150℃