Model No: COM20020I-DZD-TR
Microchip Technology COM20020I-DZD-TR
Manufacturer: Microchip Technology
SEMICON NO.: COM20020I-DZD-TR
Package: 28-PLCC
Stock: In stock
Description: Controller ARCNET 878.1 Interface
SEMICON NO.: COM20020I-DZD-TR
Package: 28-PLCC
Stock: In stock
Description: Controller ARCNET 878.1 Interface
Quantity :
| Mfr | Microchip Technology |
| Device Type | ARCNET Network Controller |
| Protocol / Standard | ARCNET (ANSI 878.1) |
| Data Rate (Max) | 5 Mbps |
| On-Chip RAM | 2K × 8 Port RAM |
| Number of Transceivers | 1 |
| Interface Type | RS-485 |
| Supply Voltage | 5 V, 4.5 V 至 5.5 V |
| Supply Current (Max) | 40 mA |
| Technology | CMOS |
| Operating Temperature | –40°C to +85°C |
| Package | 28-PLCC |
| Mounting Type | Surface Mount |
| Compliance | RoHS Compliant |
COM20020I-DZD-TR - 5 Mbps ARCNET Controller (ANSI 878.1) with 2K x 8 On-Chip RAM (28-PLCC)
The COM20020I-DZD-TR is a 5 Mbps embedded ARCNET network controller from Microchip Technology (originally SMSC) that networks microcontrollers and intelligent peripherals in industrial, automotive and embedded control environments. Compliant with ANSI 878.1, it implements a deterministic token-passing protocol guaranteeing bounded, predictable response times for real-time applications. On chip it integrates a 2K x 8 dual-port RAM organised as eight 256-byte pages (four transmit, four receive) plus scratch-pad memory, a flexible interface that automatically detects the host bus type, an internal clock scaler and clock multiplier, and a configurable media interface supporting both the traditional hybrid interface and an RS-485 differential driver. Supporting up to 255 nodes across star, tree and bus topologies, it adds self-reconfiguration, duplicate node ID detection, receive-all-packets mode and powerful diagnostics. It runs from a single +5 V supply (4.5 V to 5.5 V), draws 40 mA typical, and comes in a RoHS-compliant 28-PLCC package rated -40 C to +85 C.
Applications
● Industrial, factory and building automation networks.
● Embedded control and intelligent peripheral networking.
● Transportation systems such as rail signalling, traffic control and vehicle networks.
● Data acquisition, remote I/O and sensor networks.
● Medical, security and legacy ARCNET infrastructure requiring deterministic performance.
Frequently Asked Questions
Q: Why choose ARCNET instead of Ethernet?
A: The token-passing protocol is deterministic, so every node transmits within a bounded time, giving predictable latency for real-time control.
Q: What is the maximum data rate and node count?
A: Up to 5 Mbps, with as many as 255 nodes on a single network.
Q: Can it connect directly to my microcontroller?
A: Yes. The interface auto-detects the host and bus type and works with 8-bit buses up to a 40 MHz clock.
The COM20020I-DZD-TR is a 5 Mbps embedded ARCNET network controller from Microchip Technology (originally SMSC) that networks microcontrollers and intelligent peripherals in industrial, automotive and embedded control environments. Compliant with ANSI 878.1, it implements a deterministic token-passing protocol guaranteeing bounded, predictable response times for real-time applications. On chip it integrates a 2K x 8 dual-port RAM organised as eight 256-byte pages (four transmit, four receive) plus scratch-pad memory, a flexible interface that automatically detects the host bus type, an internal clock scaler and clock multiplier, and a configurable media interface supporting both the traditional hybrid interface and an RS-485 differential driver. Supporting up to 255 nodes across star, tree and bus topologies, it adds self-reconfiguration, duplicate node ID detection, receive-all-packets mode and powerful diagnostics. It runs from a single +5 V supply (4.5 V to 5.5 V), draws 40 mA typical, and comes in a RoHS-compliant 28-PLCC package rated -40 C to +85 C.
Applications
● Industrial, factory and building automation networks.
● Embedded control and intelligent peripheral networking.
● Transportation systems such as rail signalling, traffic control and vehicle networks.
● Data acquisition, remote I/O and sensor networks.
● Medical, security and legacy ARCNET infrastructure requiring deterministic performance.
Frequently Asked Questions
Q: Why choose ARCNET instead of Ethernet?
A: The token-passing protocol is deterministic, so every node transmits within a bounded time, giving predictable latency for real-time control.
Q: What is the maximum data rate and node count?
A: Up to 5 Mbps, with as many as 255 nodes on a single network.
Q: Can it connect directly to my microcontroller?
A: Yes. The interface auto-detects the host and bus type and works with 8-bit buses up to a 40 MHz clock.
Alternative and Equivalent ARCNET controller Models
● COM20020I3V-DZD - the 3.3 V version in the 28-pin PLCC, a parametrically equivalent option for lower-voltage systems.
● COM20019I-DZD - a cost-competitive member limited to 312.5 Kbps for designs that do not need the full 5 Mbps.
● COM20019I-HD - the low-cost ARCNET controller in a 24-pin DIP for through-hole and legacy boards.
● COM20022I-3.3V - a higher-performance 10 Mbps ARCNET controller with 2K x 8 on-chip RAM for bandwidth-hungry networks.
● COM20020I3V-DZD - the 3.3 V version in the 28-pin PLCC, a parametrically equivalent option for lower-voltage systems.
● COM20019I-DZD - a cost-competitive member limited to 312.5 Kbps for designs that do not need the full 5 Mbps.
● COM20019I-HD - the low-cost ARCNET controller in a 24-pin DIP for through-hole and legacy boards.
● COM20022I-3.3V - a higher-performance 10 Mbps ARCNET controller with 2K x 8 on-chip RAM for bandwidth-hungry networks.
