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Product Detailed Parameters
- Description：IC UART CMOS DUAL 40DIP
- Series：-
- Mfr：MaxLinear, Inc.
- Package：Tube
- Features：Internal Oscillator, Timer/Counter
- Number of Channels：2, DUART
- FIFO's：-
- Protocol：-
- Data Rate (Max)：1Mbps
- Voltage - Supply：5V
- With Auto Flow Control：-
- With IrDA Encoder/Decoder：-
- With False Start Bit Detection：-
- With Modem Control：-
- Mounting Type：Through Hole
- Package / Case：40-DIP (0.600", 15.24mm)
- Supplier Device Package：40-PDIP
- Grade：-
- Qualification：-
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Overview
The XR68C681P-F is a CMOS Dual Channel UART (DUART) manufactured by MaxLinear, Inc. It provides two independent asynchronous serial communication channels within a single integrated circuit. The device supports data rates up to 1 Mbps and operates with a supply voltage of 5 V. It features an internal oscillator and timer/counter capabilities for precise baud rate generation. The component is housed in a 40-pin Dual In-line Package (DIP), suitable for through-hole mounting on printed circuit boards.
Feature Summary
- Dual independent asynchronous receiver/transmitter channels
- Internal oscillator and timer/counter functionality
- CMOS technology for low power consumption
- Standard 5V logic interface compatibility
Applications
- Industrial control systems requiring dual serial ports
- Embedded computer interfaces
- Telecommunications equipment
- Point-of-sale terminals
Procurement Notes
Verify the specific suffix P-F against the manufacturer's current datasheet to confirm pinout and electrical characteristics. Confirm end-of-life status as distribution availability varies. Ensure the 40-PDIP package matches the target PCB footprint requirements before procurement.
Selection Notes
Select this component when dual UART functionality is required in a through-hole DIP package. Compare against the XR68C681J-F variant if surface mount PLCC packaging is preferred instead. Verify that the 5V operating voltage aligns with the system power rails and that the 1 Mbps maximum data rate meets application throughput needs.
Part Context
This part belongs to the XR68C681 family of dual UART controllers originally developed by Exar Corporation and later acquired by MaxLinear. It serves as a legacy interface solution for systems requiring standard RS-232 or TTL serial communication links without external controller overhead.
Replacement Considerations
Direct pin-compatible replacements may include the XR68C681J-F in PLCC packaging or the XR88C681 series. Verify functional equivalence regarding register maps and timing specifications before substitution.
