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MC74AC640N
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Product Detailed Parameters
- Description：BUS TRANSCEIVER
- Series：*
- Mfr：onsemi
- Package：Bulk
- Logic Type：-
- Number of Elements：-
- Number of Bits per Element：-
- Input Type：-
- Output Type：-
- Current - Output High, Low：-
- Voltage - Supply：-
- Operating Temperature：-
- Mounting Type：-
- Package / Case：-
- Supplier Device Package：-
- Grade：-
- Qualification：-
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Overview
The MC74AC640N is an octal buffer and line driver manufactured by onsemi, belonging to the AC logic family. It features eight independent buffers with inverting outputs and operates within a supply voltage range of 2.0 V to 6.0 V. The device provides high noise immunity and low input current characteristics typical of CMOS technology. It is housed in a 20-pin DIP package and supports output drive capabilities of 24 mA. The component is designed for applications requiring robust signal buffering and driving in digital systems.
Feature Summary
- Octal configuration with inverting outputs for versatile signal routing
- High noise immunity and low input current inherent to CMOS architecture
- Dual-sided pinout layout facilitating printed circuit board density optimization
- Robust output drive capability suitable for multiple load interfacing
Applications
- Memory address and data bus buffering
- Clock signal distribution and driving
- Microprocessor I/O port expansion
- General-purpose bidirectional bus transceiver applications
Procurement Notes
Verify the specific suffix 'N' indicates the 20-pin DIP package variant when sourcing. Confirm RoHS compliance status as manufacturing processes evolve. Ensure the operating temperature range meets system requirements. Cross-reference the manufacturer part number with distributor databases to confirm current production status and availability constraints.
Selection Notes
Select this component for designs requiring eight-channel inverting buffering with high drive strength. Consider the AC series speed-power trade-offs compared to HC or ACT families. Evaluate the through-hole DIP packaging against surface-mount alternatives if PCB layout constraints permit. Verify voltage compatibility with the target system logic levels before integration.
Part Context
This device is part of the broader 74AC logic family, known for faster switching speeds than standard HC devices while maintaining CMOS power efficiency. It shares functional similarities with other octal drivers like the 74AC240 but differs in pinout configuration. The AC series is widely used in legacy and industrial systems requiring reliable digital signal transmission.
Replacement Considerations
Direct substitutes include MC74ACT640N for TTL-compatible inputs. Equivalent parts from other manufacturers may include SN74AC640N. Verify pinout compatibility and electrical specifications before substitution.
