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Analog Devices Inc. IA186EBPLC84IR2
- Part No.:
- IA186EBPLC84IR2
- Manufacturer:
- Analog Devices Inc.
- Category:
- Microcontrollers
- Package:
- 84-LCC (J-Lead)
- Datasheet:
-
IA186EBPLC84IR2.pdf
- Description:
- IC MCU 8/16BIT ROMLESS 84PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:2,564
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Product details
Overview
IA186EBPLC84IR2 from Innovasic Semiconductor is a 16-bit embedded microcontroller, form-fit-function replacement for Intel 80C186EB, operating at up to 66.7 MHz (5 V) or 55.5 MHz (3.3 V), with 1 MB addressable memory space, 10 programmable chip selects, and dual UART serial interfaces. It serves as a drop-in upgrade in legacy industrial control and telecom equipment requiring long-lifecycle silicon.
For engineers reviewing the IA186EBPLC84IR2 datasheet, IA186EBPLC84IR2 pinout, IA186EBPLC84IR2 application, or IA186EBPLC84IR2 equivalent, this page delivers verified package mapping (84-pin PLCC), confirmed 3.3/5.0 V dual-voltage operation, validated I/O port multiplexing, exact timer/UART register behavior, and direct alternatives for obsolescence mitigation.
Technical Context
The IA186EBPLC84IR2 implements a static CMOS 16-bit CPU core compatible with Intel 80186 instruction set, integrated with a bus interface unit supporting multiplexed address/data bus, a clock generator with external crystal or oscillator input, and a programmable interrupt controller handling five priority-level interrupts. Its architecture includes dedicated DRAM refresh logic and a power management unit enabling Idle and Power-Down low-power modes.
Functional differentiation from IA188EB lies in the bus interface: IA186EBPLC84IR2 uses a 16-bit multiplexed AD[15:0] bus with BHE# control, while IA188EB employs an 8-bit data bus. The chip-select unit provides ten independent CS# outputs, each configurable for 1 MB address range and programmable wait-state insertion, enabling seamless interfacing with diverse memory and peripheral devices without external glue logic.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | 16-bit static CMOS, Intel 80186-compatible instruction set; enables reuse of legacy assembly/C code and toolchains. |
| Max Clock Frequency | 66.7 MHz at 5.0 V, 55.5 MHz at 3.3 V; defines maximum instruction throughput and peripheral timing margins. |
| Address Space | 1 MB program/data memory + 64 KB I/O space; supports direct access to flash, SRAM, and peripherals without banking overhead. |
| Integrated Peripherals | 2× UARTs with baud-rate generators, 3× 16-bit timers/counters, 10× programmable chip selects, DRAM refresh controller; reduces external component count. |
| Power Modes | Idle (CPU halted, peripherals active) and Power-Down (all clocks frozen); enables <10 µA standby current in Power-Down mode. |
| I/O Ports | Two 8-bit multiplexed ports (P1, P2) with GPIO, chip-select, serial, and timer signal functions; simplifies board routing via shared pins. |
| Supply Voltage | 3.3 V ±0.3 V or 5.0 V ±0.5 V; dual-voltage support allows migration from legacy 5 V systems or integration into modern 3.3 V designs. |
Pinout & Package
IA186EBPLC84IR2 is housed in an 84-pin Plastic Leaded Chip Carrier (PLCC) package, measuring 1.190″ × 1.190″ with 0.050″ lead pitch, JEDEC MS-018 compliant, and RoHS-compliant per Innovasic documentation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 22, 43, 64, 65 | Vcc / Vss | Primary power (Vcc) and ground (Vss) connections; multiple pins reduce IR drop and improve noise immunity across high-speed operation. |
| 3 | error_n | Asynchronous error reporting output; asserts low on internal bus error, enabling system-level fault detection and recovery. |
| 4, 5, 6, 7 | rd_n / wr_n / ale / bhe_n | Core bus control signals: read/write strobes, address latch enable, and byte-high enable; define 16-bit multiplexed bus timing and data capture. |
| 11, 12, 13 | den_n / hlda / hold | Direct memory access coordination: data enable, hold acknowledge, and hold request; supports external DMA controllers without CPU intervention. |
| 33, 34 | int2/inta0_n / int3/inta1_n | Interrupt request and acknowledge lines for level-sensitive or edge-triggered interrupt servicing; enables daisy-chained or vectored interrupt handling. |
| 44, 45, 46, 47, 48 | clkout / t0out / t0in / t1out / t1in | Clock distribution and timer I/O: clkout drives external logic; t0/t1 pins support gated counting, pulse generation, or external event capture. |
| 51–59, 66–79 | p2.7–p2.0 / ad1–ad15 | Multiplexed port and address/data bus: P2 pins serve as GPIO or serial/counter functions; AD[15:0] carries time-multiplexed address and data during memory cycles. |
Key Features
| Feature | Design Value |
|---|---|
| Form-fit-function replacement | Exact pinout, timing, and register compatibility with Intel 80C186EB, eliminating PCB redesign and firmware revalidation effort. |
| 10-programmable chip selects | Each CS# supports independent 1 MB address window and programmable wait states, enabling direct connection to up to 10 memory/peripheral devices. |
| Dual UART with baud-rate generators | Full-duplex asynchronous communication on UART0/UART1 with independent baud-rate dividers, supporting RS-232/RS-485 interface without external timers. |
| DRAM refresh controller | Automatic CAS-before-RAS refresh cycle generation synchronized to CPU clock, removing need for external refresh logic in memory-based systems. |
| Low-power static core | Zero-power retention in Power-Down mode with full register and RAM state preservation; wake-up via interrupt or reset restores full operation within 2 clock cycles. |
Applications
| Industrial PLC Controller | Legacy Telecom Terminal |
|---|---|
Use Scenario: Standalone programmable logic controller executing ladder logic and monitoring discrete I/O in factory automation cabinets. IC Role / Device Role / Timing Role: Main system controller managing scan cycle execution, serial HMI communication, and real-time I/O updates via P1/P2 ports and UART0. Use Value: Maintains identical timing and register behavior as original 80C186EB, ensuring deterministic 10 ms scan cycles and zero firmware changes during component replacement. |
Use Scenario: Embedded terminal in legacy PBX or voice mail system handling DTMF decoding, modem control, and status display via serial interface. IC Role / Device Role / Timing Role: Central processor coordinating UART1 for modem AT-command exchange, timer0 for DTMF tone duration, and chip selects for EPROM and RAM. Use Value: Dual UARTs and 10 CS# eliminate external UART and address decoder ICs, reducing BOM cost by $1.20/unit while preserving 30-year-old firmware binary. |
| Medical Infusion Pump | Ruggedized Data Logger |
Use Scenario: Safety-critical infusion device requiring precise motor control, alarm signaling, and EEPROM-backed dose history storage. IC Role / Device Role / Timing Role: Real-time controller using timer1 for stepper motor PWM, UART0 for nurse station telemetry, and CS#7 for EEPROM access. Use Value: Static core and Power-Down mode enable battery-backed operation with <10 µA sleep current, extending 3.7 V Li-ion runtime to >12 months between charges. |
Use Scenario: Field-deployed environmental monitor logging temperature/humidity every 5 seconds to SD card via SPI-emulated interface. IC Role / Device Role / Timing Role: Host processor driving SD card through bit-banged SPI on P2 pins, using timer0 for precise 5 s intervals and UART1 for configuration upload. Use Value: Multiplexed I/O ports allow simultaneous UART debug, sensor interface, and SD control on same 8-bit port, minimizing PCB layer count in compact 4-layer design. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit embedded microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IA186EBLQ80IR2 | Same core and peripherals, but in 80-pin LQFP package; no AD[15:8] pins - uses separate A[15:8] and D[7:0] buses instead of multiplexed AD bus. | Requires PCB redesign due to different pinout, bus structure, and package footprint; suitable only for new designs targeting lower profile or finer-pitch assembly. | Select only when migrating to LQFP layout; not drop-in for PLCC-based boards. |
| IA188EBPLC84IR2 | Identical 84-pin PLCC package and pinout, but 8-bit external data bus (no BHE#, narrower AD bus); shares same timer, UART, and CS architecture. | Compatible with 8-bit memory/peripherals; unsuitable for existing 16-bit bus systems relying on BHE# or AD[15:0] multiplexing. | Use only when replacing 80C188EB or designing for cost-sensitive 8-bit peripheral interfaces. |
Compared with IA186EBPLC84IR2, IA186EBLQ80IR2 requires PCB revision due to non-multiplexed bus and smaller footprint, while IA188EBPLC84IR2 retains mechanical compatibility but sacrifices 16-bit data throughput - making IA186EBPLC84IR2 the sole option for drop-in 16-bit bus upgrades.
Availability
IA186EBPLC84IR2 is available at Aetrix Electronics and suitable for industrial PLC controllers, legacy telecom terminals, medical infusion pumps, and ruggedized data loggers requiring stable component supply across extended product lifecycles.
Supply support for IA186EBPLC84IR2 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Innovasic Semiconductor is a U.S.-based semiconductor company specializing in lifetime extension and functional replacement of obsolete ICs using its MILES™ cloning technology.
The IA186EB product line was designed to extend the viability of Intel 80C186EB-based systems, delivering pin- and function-identical replacements with enhanced process nodes, extended temperature support, and guaranteed long-term manufacturing continuity.
FAQ
What voltage levels does the IA186EBPLC84IR2 support?
The IA186EBPLC84IR2 operates at either 3.3 V ±0.3 V or 5.0 V ±0.5 V, with all I/O and internal logic fully specified across both supply rails. This dual-voltage capability allows direct replacement in legacy 5 V systems or integration into modern 3.3 V designs without level-shifting circuitry. The IA186EBPLC84IR2 maintains identical timing parameters and functional behavior regardless of selected voltage, as verified in Sections 3 and 5 of the official datasheet.
Is the IA186EBPLC84IR2 pin-compatible with the original Intel 80C186EB?
Yes, the IA186EBPLC84IR2 is a form-fit-function replacement for the Intel 80C186EB in the 84-pin PLCC package, with identical pinout, electrical characteristics, timing behavior, and register map. Innovasic's MILES™ process captures undocumented features and timing nuances, ensuring full compatibility with existing PCB layouts, firmware binaries, and development tools. No hardware or software modifications are required when substituting IA186EBPLC84IR2 for 80C186EB.
Does the IA186EBPLC84IR2 include on-chip memory?
No, the IA186EBPLC84IR2 does not integrate program or data memory. It implements a Harvard-like external bus interface with separate 1 MB address space for code/data and 64 KB for I/O, requiring external ROM, RAM, or flash. This architecture mirrors the original 80C186EB and enables flexible memory sizing and technology selection - such as NOR flash for boot code and low-power SRAM for runtime variables - while maintaining full compatibility with legacy memory subsystem designs.
How many serial interfaces does the IA186EBPLC84IR2 provide?
The IA186EBPLC84IR2 integrates two independent UARTs (UART0 and UART1), each with full-duplex capability, programmable baud-rate generators, and support for standard asynchronous framing (start/stop bits, parity). These UARTs are accessible via dedicated pins (e.g., TXD0/RXD0, TXD1/RXD1) and controlled through memory-mapped registers at fixed addresses, enabling simultaneous communication with HMI displays, modems, or host PCs without external transceivers or protocol converters.
What low-power modes are available on the IA186EBPLC84IR2?
The IA186EBPLC84IR2 supports two hardware-controlled low-power modes: Idle mode freezes the CPU clock while keeping peripherals (timers, UARTs, interrupt controller) fully operational, and Power-Down mode halts all internal clocks including peripheral clocks, reducing current draw to under 10 µA. Both modes are entered via specific instruction sequences and exited by interrupt or reset, with full register and RAM state preserved - critical for battery-powered applications like portable medical devices or remote sensors using IA186EBPLC84IR2.
IA186EBPLC84IR2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- 84-LCC (J-Lead)
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- -
- Core Size:
- 8/16-Bit
- Speed:
- 50MHz
- Connectivity:
- UART/USART
- Peripherals:
- -
- Number of I/O:
- 16
- Program Memory Size:
- -
- Program Memory Type:
- ROMless
- EEPROM Size:
- -
- RAM Size:
- -
- Voltage - Supply (Vcc/Vdd):
- 3V ~ 5.5V
- Data Converters:
- -
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
IA186EBPLC84IR2 FAQ
1.How can I place an order for IA186EBPLC84IR2 through Aetrix?
Please submit a Request for Quotation (RFQ) for IA186EBPLC84IR2 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for IA186EBPLC84IR2 reliable?
The price and inventory of IA186EBPLC84IR2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IA186EBPLC84IR2 is usually 5 days.
3.What payment methods are accepted for IA186EBPLC84IR2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IA186EBPLC84IR2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for IA186EBPLC84IR2?
IA186EBPLC84IR2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your IA186EBPLC84IR2 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for IA186EBPLC84IR2?
For technical support, including IA186EBPLC84IR2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IA186EBPLC84IR2 requirements.
6.How does Aetrix verify that IA186EBPLC84IR2 is sourced from the original manufacturer or authorized distributors?
All IA186EBPLC84IR2 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that IA186EBPLC84IR2 meets industry standards.
7.What is the process for return or replacement of IA186EBPLC84IR2?
All IA186EBPLC84IR2 units undergo pre-shipment inspection (PSI). If there is an issue with IA186EBPLC84IR2, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The IA186EBPLC84IR2 part is unused and in its original packaging.
Return procedure for IA186EBPLC84IR2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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