Analog Devices Inc. IA186EBPLQ80IR2

Overview

IA186EBPLQ80IR2 from Innovasic Semiconductor is a 16-bit embedded microcontroller and form-fit-function replacement for the Intel 80C186EB, featuring 66.7 MHz operation at 5 V, integrated dual UARTs, three 16-bit programmable timers, and 10 configurable chip-select units with integral wait-state generation. It serves as a drop-in upgrade in legacy industrial control and telecom equipment requiring long-term supply continuity.

For engineers reviewing the IA186EBPLQ80IR2 datasheet, IA186EBPLQ80IR2 pinout, IA186EBPLQ80IR2 application, or IA186EBPLQ80IR2 equivalent, this page delivers verified package mapping (80-pin LQFP), confirmed pin functions per Table 5, real-world timing constraints (e.g., 55.5 MHz @ 3.3 V), and validated alternatives for obsolescence mitigation without board redesign.

Technical Context

The IA186EBPLQ80IR2 implements a static CMOS CPU core compatible with the Intel 80186 instruction set, with bus interface unit supporting multiplexed address/data (AD0–AD15), separate A16–A19 lines, and dedicated control signals including rd_n, wr_n, ale, and den_n. Its architecture includes a clock generator accepting external clkin (up to 66.7 MHz) and producing clkout with 50% duty cycle.

Functional peripherals include a programmable interrupt controller handling five vectored interrupts (int0–int4), a DRAM refresh control unit with auto-refresh capability, and two full-duplex serial ports (UART0/UART1) with independent baud-rate generators and hardware flow control (cts0_n/rxd0/txd0, cts1_n/rxd1/txd1). The chip-select unit provides ten 1-Mbyte addressable regions with programmable timing and wait-state insertion.

Key Specifications

Pinout & Package

IA186EBPLQ80IR2 is housed in an 80-pin Low-Profile Quad Flat Package (LQFP) with 0.5 mm pitch, 14.0 mm × 14.0 mm body, and 1.40 mm nominal height (per Figure 9 and Table 5). Pin 1 is located at top-left corner with dot marking; pins are numbered counter-clockwise.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-bit embedded microcontroller applications.

Compared with IA186EBPQF80IR2, IA186EBPLQ80IR2 offers lower profile and improved thermal dissipation for space-constrained enclosures; compared with IA188EBPLQ80IR2, it preserves full 16-bit data throughput and eliminates need for software data-width adaptation.

Availability

IA186EBPLQ80IR2 is available at Aetrix Electronics and suitable for industrial PLC controllers, legacy telecom terminals, medical diagnostic equipment, avionics data recorders, and embedded instrumentation requiring stable component supply across 10+ year production lifecycles.

Supply support for IA186EBPLQ80IR2 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 fabless IC company specializing in lifetime extension of obsolete industrial and military-grade microcontrollers through its MILES™ cloning technology.

The IA186EB product line was designed to replace Intel's discontinued 80C186EB in mission-critical embedded systems where firmware, layout, and certification reuse are mandatory - prioritizing functional fidelity over feature addition.

FAQ

What is the operating voltage range supported by the IA186EBPLQ80IR2?

The IA186EBPLQ80IR2 operates at either 5.0 V ±10% or 3.3 V ±10%, with corresponding maximum frequencies of 66.7 MHz and 55.5 MHz respectively. Both voltage modes share identical I/O logic levels, register maps, and timing architecture - allowing seamless migration between supply rails without firmware modification. The IA186EBPLQ80IR2 datasheet specifies DC parameters and AC characteristics separately for each voltage condition in Tables 11, 13–16.

Does the IA186EBPLQ80IR2 support the same instruction set as the original Intel 80C186EB?

Yes, the IA186EBPLQ80IR2 executes the full Intel 80186 instruction set, including all documented and undocumented opcodes preserved via Innovasic's MILES™ cloning process. Instruction timing matches the original 80C186EB within ±1 cycle across all addressing modes, ensuring binary compatibility with legacy assemblers, compilers, and debug tools. This fidelity is confirmed in Section 8 (Instruction Execution Times) of the IA186EB/IA188EB datasheet.

How many chip-select signals does the IA186EBPLQ80IR2 provide, and are they configurable?

The IA186EBPLQ80IR2 provides 10 independent chip-select outputs (gcs0_n through gcs7_n, lcs_n, ucs_n), each programmable for address range, wait-state count, and timing parameters via dedicated control registers. This enables direct interfacing with multiple memory banks (Flash, SRAM, EEPROM) and peripherals without external address decoders - a key advantage over generic microcontrollers requiring glue logic.

Can the IA186EBPLQ80IR2 be used as a drop-in replacement for the Intel 80C186EB in an existing design?

Yes, the IA186EBPLQ80IR2 is explicitly designed as a form-fit-function replacement for the Intel 80C186EB, with identical pinout (per Table 5), electrical characteristics, timing behavior, and register-level compatibility. No PCB layout changes, firmware modifications, or toolchain updates are required - validated through Innovasic's MILES™ process which captures even undocumented silicon behaviors present in the original device.

What are the key differences between the IA186EBPLQ80IR2 and the IA188EBPLQ80IR2?

The IA186EBPLQ80IR2 features a 16-bit external data bus (AD0–AD15), while the IA188EBPLQ80IR2 uses an 8-bit bus (AD0–AD7), resulting in fundamentally different pin assignments, memory bandwidth, and firmware data-path requirements. Though both use 80-pin LQFP packages, their pinouts are incompatible - IA188EBPLQ80IR2 replaces AD8–AD15 with address lines A8–A15, making them non-interchangeable without hardware and software redesign.