Specifications
SKU: 8978447
Parameter | Description | Value |
---|---|---|
Part Number | Part number of the device | SN74LS688DWR2 |
Function | 8-Bit Identity Comparator with Three-State Outputs | |
Supply Voltage (VCC) | Operating supply voltage | 4.75 V to 5.25 V |
Supply Current (ICC) | Maximum supply current at VCC = 5 V, TA = 25°C | 30 mA |
Input Voltage (VIH) | High-level input voltage | 2.0 V to 5.25 V |
Input Voltage (VIL) | Low-level input voltage | 0 V to 0.8 V |
Output Voltage (VOH) | High-level output voltage (IOL = -0.4 mA) | 2.4 V to 5.25 V |
Output Voltage (VOL) | Low-level output voltage (IOH = 16 mA) | 0 V to 0.5 V |
Propagation Delay Time | Typical propagation delay time from input to output (TA = 25°C) | 18 ns |
Operating Temperature | Junction temperature range | -55°C to 125°C |
Storage Temperature | Storage temperature range | -65°C to 150°C |
Package Type | Package type | DIP-20 |
Pin Count | Number of pins | 20 |
Instructions for Use
Power Supply:
- Connect VCC to +5 V and GND to ground.
- Ensure that the power supply is stable and within the specified range (4.75 V to 5.25 V).
Inputs:
- Connect the A0-A7 inputs to the first set of 8-bit data.
- Connect the B0-B7 inputs to the second set of 8-bit data.
- The A0-A7 and B0-B7 inputs should be driven by logic levels (0 V or 5 V).
Outputs:
- The A=B output will be high (5 V) if the data on A0-A7 matches the data on B0-B7.
- The A>B and A<B outputs will be high (5 V) if the data on A0-A7 is greater than or less than the data on B0-B7, respectively.
- The three-state outputs can be enabled or disabled using the G (gate) input. When G is low, the outputs are in a high-impedance state.
Three-State Control:
- The G input controls the three-state outputs. When G is high, the outputs are active. When G is low, the outputs are in a high-impedance state.
Temperature Considerations:
- Ensure that the device operates within the specified temperature range (-55°C to 125°C).
- Avoid exposing the device to temperatures outside the storage range (-65°C to 150°C).
Handling:
- Handle the device with care to avoid damage from electrostatic discharge (ESD).
- Use appropriate ESD protection measures when handling and soldering the device.
Mounting:
- Ensure proper mounting and soldering to maintain electrical and mechanical integrity.
- Follow standard PCB design and assembly guidelines for reliable operation.
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