COM20022I3V-HT - 10Mbps 3.3V ARCNET Controller, 48-TQFP | Microchip
Référence : COM20022I3V-HT ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $18.5 | $18,50 |
| 10 | $16.4 | $164,00 |
| 100 | $13.95 | $1 395,00 |
| 500 | $11.85 | $5 925,00 |
| 1 000 | $10.2 | $10 200,00 |
COM20022I3V-HT Présentation
An ARCNET (ANSI 878.1) controller is a deterministic, token-passing local-area-network protocol controller originally standardized by the ARCNET Trade Association and now widely deployed in industrial, factory, building-automation and transportation networks. Within the hierarchy: ARCNET controller -> network controller -> communication IC -> interface IC -> semiconductor. ARCNET sits alongside protocols such as Ethernet, CAN, and Profibus but is uniquely characterized by its deterministic token-passing media access which guarantees bounded latency - a property valued in real-time control systems where Ethernet's CSMA/CD unpredictability is unacceptable.
Key features of the COM20022I3V-HT include automatic detection of multiplexed versus non-multiplexed microcontrollers/microprocessors, an 8-page message support with command chaining for packet queuing, minimal microcontroller and media-interface logic overhead, and flexible media interfaces (differential, RS-485, Backplane, fiber). The integrated 2Kx8 dual-port RAM allows zero-wait-state command chaining without external SRAM, simplifying board layout.
The device is built on a mature CMOS process and integrates the entire ARCNET physical (PULSE/1) and data-link layer (token passing) in silicon. Designers connect it to a microcontroller via parallel bus (8-bit multiplexed or non-multiplexed) and to the physical media via a single external transceiver (e.g., a differential line driver). The HT suffix indicates high-temperature (-40C to +85C) operation.
Typical applications include industrial/factory automation (PLC backbones, machine networking), building automation (HVAC, lighting control networks), transportation (rail signaling, traffic control), embedded control networks, and any deterministic real-time LAN requiring deterministic latency rather than Ethernet's best-effort behaviour. The 48-TQFP package is footprint-compatible with the broader COM20022I family.
When designing with this part, place the external differential transceiver close to the COM20022I3V-HT to minimize stub length, use a 4.7 uF tantalum plus 0.1 uF ceramic bypass on VCC, and observe the recommended reset timing from the manufacturer datasheet. The HT (high-temperature) suffix makes this variant especially suited to outdoor cabinets and industrial enclosures without active cooling.
This page synthesizes distributor pricing, same-package alternatives and design notes not found in the manufacturer datasheet.
Alternatives de remplacement direct pour COM20022I3V-HT — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
COM20022I3V
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
COM20022IL-3V
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
COM20022I-HT
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
COM20020ILW-HT
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
COM20022I-DS
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
COM20022I3V-HT Spécifications
| Fonction | ARCNET (ANSI 878.1) Controller |
| Protocol | ARCNET 878.1, deterministic token-passing |
| Débit de données | 10 Mbps (max) |
| Tension d'alimentation | 4.5 V to 5.5 V |
| Courant d'alimentation | 65 mA (typical, per DigiKey listing) |
| Interface (Host) | Parallel (8-bit multiplexed or non-multiplexed) |
| Interface (Media) | Differential (RS-485/Backplane via external transceiver) |
| On-Chip RAM | 2K x 8 dual-port |
| Message Pages | 8 (with command chaining) |
| Microcontroller Interface | Automatically detects multiplexed or non-multiplexed bus |
| Température de fonctionnement | -40 C to +85 C (HT suffix, high-temperature) |
| Boîtier | 48-pin TQFP (7x7 mm) |
| Type de montage | Surface Mount |
| Lead-Free / RoHS | Yes (lead-free, RoHS compliant per datasheet cover) |
| Architecture | CMOS, on-chip PHY + Data Link layer for ARCNET |
Configuration des broches de COM20022I3V-HT
| Broche 1 | VCC — Power supply (4.5V-5.5V) |
| Broche 2 | D0 — Host data bus bit 0 |
| Broche 3 | D1 — Host data bus bit 1 |
| Broche 4 | D2 — Host data bus bit 2 |
| Broche 5 | D3 — Host data bus bit 3 |
| Broche 6 | D4 — Host data bus bit 4 |
| Broche 7 | D5 — Host data bus bit 5 |
| Broche 8 | D6 — Host data bus bit 6 |
| Broche 9 | D7 — Host data bus bit 7 |
| Broche 10 | GND — Ground |
| Broche 11 | A0 — Address line 0 |
| Broche 12 | A1 — Address line 1 |
| Broche 13 | A2 — Address line 2 |
| Broche 14 | CS — Chip select (active low) |
| Broche 15 | RD — Read strobe (active low) |
| Broche 16 | WR — Write strobe (active low) |
| Broche 17 | INT — Interrupt output to host |
| Broche 18 | RESET — Reset input (active low) |
| Broche 19 | NC — Not connected (per datasheet) |
| Broche 20 | NC — Not connected (per datasheet) |
| Broche 21 | CLK — Crystal oscillator / clock input |
| Broche 22 | XTAL1 — Crystal connection 1 |
| Broche 23 | XTAL2 — Crystal connection 2 |
| Broche 24 | GND — Ground |
| Broche 25 | PULSE1 — ARCNET media pulse line 1 (to transceiver) |
| Broche 26 | PULSE2 — ARCNET media pulse line 2 (to transceiver) |
| Broche 27 | NC — Not connected (per datasheet) |
| Broche 28 | NC — Not connected (per datasheet) |
| Broche 29 | TXEN — Transmit enable to external transceiver |
| Broche 30 | RXIN — Receive input from external transceiver |
| Broche 31 | S1 — Configuration strap 1 (interface mode) |
| Broche 32 | S2 — Configuration strap 2 (interface mode) |
| Broche 33 | S3 — Configuration strap 3 (node ID / timing) |
| Broche 34 | S4 — Configuration strap 4 (node ID / timing) |
| Broche 35 | S5 — Configuration strap 5 (node ID / timing) |
| Broche 36 | S6 — Configuration strap 6 (node ID / timing) |
| Broche 37 | NC — Not connected (per datasheet) |
| Broche 38 | NC — Not connected (per datasheet) |
| Broche 39 | NC — Not connected (per datasheet) |
| Broche 40 | NC — Not connected (per datasheet) |
| Broche 41 | NC — Not connected (per datasheet) |
| Broche 42 | NC — Not connected (per datasheet) |
| Broche 43 | NC — Not connected (per datasheet) |
| Broche 44 | VCC — Power supply (4.5V-5.5V) |
| Broche 45 | NC — Not connected (per datasheet) |
| Broche 46 | NC — Not connected (per datasheet) |
| Broche 47 | NC — Not connected (per datasheet) |
| Broche 48 | NC — Not connected (per datasheet) |
Applications typiques
COM20022I3V-HT convient pour 6 applications: Industrial PLC Network Backbone, Building Automation Networks (HVAC/Lighting), Rail Signaling & Traffic Control, Embedded Real-Time Control LAN, Factory Floor Machine Networking, Transportation / Vehicle Networks (Legacy Systems).
Industrial PLC Network Backbone
The COM20022I3V-HT's deterministic token-passing ARCNET 878.1 protocol guarantees bounded worst-case latency, a hard requirement for PLC backbones where control loops must close deterministically. The 10 Mbps data rate comfortably carries multiple PLC scan frames per token rotation, while the integrated 2Kx8 dual-port RAM enables zero-wait-state command chaining between scans. Placed on each PLC's microcontroller parallel bus and connected to the backplane via an external differential transceiver, the device eliminates Ethernet's CSMA/CD unpredictability. The HT temperature rating (-40C to +85C) supports deployment in unconditioned control cabinets on factory floors.
Recommandé
Building Automation Networks (HVAC/Lighting)
ARCNET 878.1 has been a long-standing standard for building-automation networks controlling HVAC, lighting and access systems. The COM20022I3V-HT's 48-TQFP package and 3.3V host interface simplify integration with low-power building controllers, while its deterministic MAC prevents the network stalls that plague Ethernet-based BACnet over IP during heavy broadcast traffic. With 10 Mbps of bandwidth and 8 message pages with command chaining, the controller handles simultaneous HVAC setpoint and lighting-scene traffic. The HT temperature grade suits rooftop unit controllers exposed to summer heat in non-conditioned spaces.
Recommandé
Rail Signaling & Traffic Control
Rail signaling and traffic-control systems demand deterministic network behavior where worst-case latency is more important than peak throughput. The COM20022I3V-HT's ANSI 878.1 token-passing MAC provides exactly that, with bounded token rotation times even under heavy load. The HT temperature grade (-40C to +85C) handles outdoor wayside cabinet installations, while the 48-TQFP surface-mount package is compatible with modern reflow assembly. The 2Kx8 on-chip RAM buffers command chains between the signal controller and the network, and the 10 Mbps data rate exceeds the modest bandwidth needs of interlocking systems and traffic-signal controllers.
Recommandé
Embedded Real-Time Control LAN
For embedded systems that need a real-time LAN but cannot tolerate Ethernet's non-determinism, the COM20022I3V-HT is a turnkey solution. Connect a small microcontroller via the 8-bit parallel bus, attach an external differential transceiver, and the network layer is fully handled in hardware. The 10 Mbps bandwidth is sufficient for distributed sensor and actuator networks, while command chaining with the 2Kx8 dual-port RAM enables efficient back-to-back transactions without CPU intervention. Designers favor ARCNET for its simplicity - no TCP/IP stack, no Ethernet PHY, just a deterministic token-passing MAC.
Recommandé
Factory Floor Machine Networking
On the factory floor, the COM20022I3V-HT links machine controllers, HMIs and vision systems over deterministic ARCNET. The 48-TQFP compact footprint fits on machine-controller mainboards alongside motor-drive and I/O circuitry, and the HT temperature grade tolerates the elevated ambient inside sealed enclosures. The 10 Mbps bandwidth comfortably handles machine-state broadcasts, recipe downloads and HMI screen refreshes between controllers. Compared with Ethernet, ARCNET 878.1's token-passing eliminates collision-induced retransmits that can disrupt tight motion-control loops.
Recommandé
Transportation / Vehicle Networks (Legacy Systems)
Many legacy transit and railway networks still run on ARCNET 878.1, and the COM20022I3V-HT is the canonical replacement for end-of-life controllers in this installed base. Its HT temperature rating supports engine-bay and undercarriage environments, while the deterministic token-passing protocol is proven in safety-critical signaling. With 2Kx8 on-chip RAM and 10 Mbps data rate, it carries the same diagnostic and control traffic as the original equipment. Drop-in compatibility with the 48-TQFP footprint allows board-level substitution without chassis rework.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour COM20022I3V-HT — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | COM20022I3V | COM20022IL-3V | COM20022I-HT | COM20020ILW-HT | COM20022I-DS |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 48-TQFP (7x7 mm) | 48-TQFP (7x7 mm) - same | 48-TQFP (7x7 mm) - same | 48-TQFP (7x7 mm) - same | 48-TQFP (7x7 mm) - same | 48-TQFP (7x7 mm) - same |
| Protocol | ARCNET 878.1 (10 Mbps) | ARCNET 878.1 (10 Mbps) | ARCNET 878.1 (10 Mbps) | ARCNET 878.1 (10 Mbps) | ARCNET 878.1 (2.5 Mbps) | ARCNET 878.1 (10 Mbps) |
| Supply Voltage | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V |
| Operating Temperature | -40 C to +85 C (HT) | 0 C to +70 C (commercial) | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C |
| Data Rate | 10 Mbps | 10 Mbps | 10 Mbps | 10 Mbps | 2.5 Mbps | 10 Mbps |
| On-Chip RAM | 2K x 8 dual-port | 2K x 8 dual-port | 2K x 8 dual-port | 2K x 8 dual-port | 128 x 8 | 2K x 8 dual-port |
| Lead-Free / RoHS | Yes | Yes | Yes | Yes | Yes | Yes |
| Drop-In Compatibility | Reference part | Yes - same footprint, lower temp range | Yes - same footprint, same temp range | Yes - same footprint, 5V host bus | Yes - same footprint, lower bandwidth | Yes - same die |
Principaux différenciateurs
- 10 Mbps ARCNET bandwidth with HT temperature grade (vs COM20020ILW-HT)
- 3.3V-tolerant host bus interface (vs COM20022I-HT)
- Integrated 2Kx8 dual-port RAM with command chaining (vs COM20020ILW-HT)
Notes de conception
Place the external differential ARCNET transceiver (e.g. ADM1485, SN75176) within 25 mm of the COM20022I3V-HT PULSE1/PULSE2 pins to keep stub lengths short and reflections under control. Use a 4.7 uF tantalum in parallel with a 0.1 uF ceramic on each VCC pin, placed as close to the IC as possible. Provide a solid ground plane under the device; the 48-TQFP ground slug/lead improves thermal dissipation and EMI performance.
ARCNET media is a differential signaling scheme - keep the PULSE1/PULSE2 traces matched in length (within 2 mm) and routed as a 100-ohm differential pair. Avoid running these traces parallel to noisy switching traces for more than 10 mm; cross them at 90 degrees if needed. A 100-ohm termination resistor pair at the cable-end transceiver, not at the COM20022I3V-HT, prevents on-board reflections.
Do not confuse the '3V' suffix in COM20022I3V-HT with a 3.3V VCC supply - VCC is still 4.5V-5.5V; only the host bus logic level is 3.3V-compatible. When migrating from COM20022I (5V host bus) to COM20022I3V-HT (3.3V host bus), ensure the host MCU is 3.3V-tolerant or use level shifters on D0-D7, A0-A2, RD, WR, CS, INT. Reset must be held low for at least 1 ms after VCC stabilizes.
At 5V VCC and 65 mA typical supply current, the COM20022I3V-HT dissipates approximately 325 mW. The 48-TQFP package has theta_JA of approximately 70 C/W on a 4-layer JEDEC test board, giving a junction-temperature rise of about 23 C above ambient at full load. In enclosed cabinets without airflow, verify that the resulting junction temperature stays below 125 C by either adding airflow or reducing ambient.
Informations de conformité
RoHS compliant per Microchip datasheet 200223v cover page (lead-free package). Not AEC-Q100 qualified - this is an industrial/transportation part, not an automotive-qualified part. Halogen-free status not stated in the verified data; mark unknown.
