MD-001HRL

Overview

The MD-001HRL is a Thinnet Transceiver module from the HALO Electronics TnT family, designed as a complete on-board solution compliant with ANSI/IEEE802.3 and ISO8802-3 standards for Thin Net. It integrates all transceiver functions into a single 20-pin package. The module operates at a nominal supply voltage of 5V with a tolerance of ±5%. Input Vee ripple is limited to 100mVpp maximum at 20MHz, while the maximum input current is 225mA. It supports an operating temperature range of 0°C to +70°C and a storage temperature range of -40°C to +125°C. This specific part number does not include the optional heartbeat function.

Feature Summary

• Integrates complete Thin Net transceiver functions within a single 20-pin package
• Includes squelch circuits on all signal inputs to eliminate noise
• Compliant with ANSI/IEEE802.3 and ISO8802-3 standards for Thin Net
• Features internal DC/DC converter

Applications

• Backplane Applications
• Network Interface Cards
• 10BASE-T Hub with 10BASE2 Interface
• Thin Net Transceivers

Procurement Notes

Verify the exact ordering suffix against official HALO Electronics documentation before purchase. Confirm that the required voltage level matches the specific variant needed, as the series includes 3.3V, 5V, and 12V options. Ensure the application does not require the heartbeat feature, which is designated by different suffixes in this product line.

Selection Notes

Select the MD-001HRL when a 5V supply is available and the heartbeat test functionality is not required. Verify that the operating environment stays within the 0°C to +70°C range. Consider other variants if the design requires extended temperature ranges or different supply voltages such as 3.3V or 12V.

Part Context

This component belongs to the HALO Electronics TnT (Thinnet Transceiver) module family. These modules are built around the H83C92 transceiver chip, developed to ensure long-term availability for IEEE802.3 compliant thin net applications. The family provides various voltage and feature configurations to support diverse network interface requirements.

Replacement Considerations

Direct replacements must match the 5V supply requirement and lack of heartbeat enablement. Variants like MD-002HRL offer the same electrical characteristics but include the heartbeat function. Ensure any substitute maintains the 20-pin DIP form factor and compatible pinout for TX±, RX±, and collision detection signals.