74LS242 Quad Bus Transceiver IC
- Quad Bus Transceiver
- Logic Type:Â Bipolar
- Logic Family:Â 74LS
- Number of Circuits:Â 4
- Output Type:Â 3-State
- High Level Output Current:Â -15 mA
- Low Level Output Current:Â 24 mA
- Propagation Delay Time:Â 30 ns
- Polarity:Â Inverting
- Supply Voltage Range:Â 4.75V to 5.25V
- Operating Temperature Range: 00C to +700C
74LS243 Quadruple Bus Transceiver IC
- Quadruple Bus Transceivers
- Logic Family:Â LS
- Number of Circuits:Â 4
- Output Type:Â 3-State
- High Level Output Current:Â -15 mA
- Low Level Output Current:Â 24 mA
- Polarity:Â Non-Inverting
- Propagation Delay Time: 18 ns
- No. of Pins:Â 14
- Operating Temperature Range: 0°C to +70°C
- Â Supply Voltage Range:Â 4.75V to 5.25V
- Package:Â DIP-14
74LS245 Octal Bus Transceiver IC
- Technology Family: LS
- VCC (Min): 4.75V
- VCC (Max): 5.25V
- Bits (#): 8
- Voltage at nominal operation: 5V
- Frequency at normal voltage (Max): 35MHz
- ICC at normal voltage (Max): 0.09mA
- Propagation delay (Max): 8ns – 12ns
- 3-State Outputs to Drive Bus Lines Directly
- PNP Inputs Reduce DC Loading on Bus Lines
- Hysteresis at Bus Inputs Improves Noise Margins
- IOL (Max): 24mA
- IOH (Max): -15mA Rating: Catalog
- Operating temperature range: 0°C to 70°C
74LS248 BCD to Seven Segment Decoder Driver IC
- BCD to Seven Segment Decoder/Driver
- Logic Family:Â 74LS
- Propagation Delay Time:Â 100 ns at 5 V
- Number of Lines In/Out:Â 4 / 7
- Operating Temperature Range:Â 00C to +700C
- Supply Voltage Range:Â 4.75V to 5.25V
- Internal Pull-Ups Eliminate Need for External Resistors
- Lamp-Test Provision
- Â Leading/Trailing Zero Suppression
- Package:Â DIP-16
74LS25 Dual 4-Input NOR Gate IC
- Dual 4-Input NOR Gates With Strobe
- High-level input voltage:Â 2V
- Low-level input voltage:Â 0.8V
- High-level output current:Â -0.8mA
- Low-level output current:Â 16mA
- No. of gates:Â 2
- No. of inputs:Â 4
- No. of outputs:Â 1
- Propagation delay time:Â 22ns
- Package:Â DIP-14
- Output type: Push-Pull
- Max Speed: (tpd 10-50ns)
- Max Data rate: 70Mbps
- Rating: Catalog
- Operating temperature range: 0°C to 70°C
74LS251 Data Selector or Multiplexer IC With 3-State Output
74LS253 Dual 4-Line to 1-Line Data Selector Multiplexer IC
- Â Permits multiplexing from N lines to 1 line
- Performs at parallel-to-serial conversion
- Strobe (enable) line provided for cascading (N lines to n lines)
- High fan-out, low impedance, totem pole outputs
- Typical average propagation delay times From data 14 ns From strobe 19 ns From select 22 ns
- Typical power dissipation 31 mW
74LS257 Quadruple 2-Line to 1-Line Data Selector or Multiplexer IC
- Quadruple 2-Line to 1-Line Data Selector/Multiplexer
- Logic Family:Â LS
- No. of Bits:Â 4
- Propagation Delay Time:Â 15 ns at 5 V
- No. of Lines In/Out:Â 2 / 1
- Output Current Max:Â 24mA
- Power Dissipation:Â 200 mW
- No. of Channels:Â 1
- No. of Pins:Â 16
- Operating Temperature Range: 0°C to +70°C
- Supply Voltage Range:Â 4.75V to 5.25V
- Package:Â DIP-16
74LS258 Quadruple 2-Line to 1-Line Data Selector or Multiplexer IC
74LS260 Dual 5-Input NOR Gate IC
- Dual 5-Input NOR Gate
- Logic Family: LS
- Technology Family: TTL
- Min VCC: 4.75V
- VCC (Max): 5.25V
- Number of Gates: 2
- High Level Output Current: - 0.4 mA
- Low Level Output Current: 8 mA
- Number of Lines In/Out: 5 / 1
- Propagation Delay Time: 12 ns at 5 V
- Supply Voltage Range: 4.75V to 5.25V
- Package: DIP14
- Output type: Push-Pull
- Max Speed: (TPD 10-50ns)
- Max Data rate: 70Mbps
- Low Power Requirements
- Standard TTL Switching Voltages
- Operating temperature range: 0°C to 70°C
74LS27 Triple 3-Input NOR Gate IC
- Triple 3-Input NOR Gate
- Max Supply Voltage 7V
- Max Input Voltage 7V
- TTL outputs
- Maximum ESD: 3.5KV
- Typical Rise Time: 15ns
- Typical Fall Time: 15ns
- High-level input voltage: 2V
- Low-level input voltage: 0.8V
- High-level output current: -0.4mA
- Low-level output current: 8mA
- of gates: 3
- of inputs: 9
- of outputs: 3
- Propagation delay time: 18ns
- Package: DIP-14
- Operating voltage range: +4.75V to +5.25V
- Low power consumption
- Operating Free Air Temperature Range 0°C to +70°C
- Storage Temperature Range -65°C to +150°C
