Z86E3312SSG
Z86E3312SSG - 8-Bit 12MHz OTP Microcontroller | Zilog
Zilog Z86E3312SSG is an 8-bit Z8 microcontroller with a 12 MHz clock, 4 KB of one-time-programmable memory organized as 4K x 8, and 24 I/O ports. The device operates from a 4.5 V to 5.5 V supply and is listed as an active part in the Zilog Z86E3312 family. Its combination of OTP program memory, an 8-bit CPU, and a 5 V operating range makes it suitable for embedded control products requiring fixed-program logic and broad I/O access.
An 8-bit microcontroller is a compact embedded-processing device that executes firmware from internal program memory and reads inputs through configurable digital ports. The Z86E3312 belongs to the Z8 family, a hierarchy that includes 8-bit microcontrollers, embedded processors, integrated circuits, and semiconductors. Zilog designed this controller for cost-sensitive appliances, access controls, industrial interfaces, and other systems where deterministic digital control is more important than high memory capacity or high-speed computation.
The principal device parameters include a 12 MHz maximum clock frequency, 4 KB of OTP program memory, an 8-bit data bus, 24 I/O ports, and a 4.5 V to 5.5 V supply-voltage range. OTP memory allows the application program to be written during manufacturing and prevents subsequent modification, which supports application locking and production traceability. The 24 available I/O lines provide substantial connectivity for switches, sensors, indicators, relays, and communication peripherals.
The Z86E3312SSG is identified as part of the Zilog Z8 microcontroller series and uses the SSG ordering code. Distributor records associate the device with the Z86E3312 family and identify its lifecycle as active. Because the detailed package dimensions, pin assignments, interrupt architecture, timer resources, and electrical timing limits are not stated in the cited product records, engineers should use the manufacturer datasheet and its pin-description table before finalizing a PCB layout.
Typical uses for this controller include industrial control panels, appliance control boards, security and access-control equipment, programmable logic controllers, and compact instrumentation. In these applications, the 24 I/O ports can distribute control signals across a compact board, while the 12 MHz clock provides sufficient throughput for sequential logic, debouncing, state-machine execution, and periodic interface servicing. OTP programming is particularly appropriate when the finished control logic must remain fixed.
The main design consideration is to verify the complete pinout, pin multiplexing, and peripheral assignments against the manufacturer datasheet before PCB routing. Designers should also confirm that every attached signal remains compatible with the 4.5 V to 5.5 V supply range and that firmware timing accounts for the 12 MHz operating limit. A Request a Quote form is available on this page for current commercial availability, lead time, and quantity requirements.
This product record combines the exact Z86E3312SSG identity, core electrical and memory characteristics, lifecycle information, practical embedded-control applications, sourcing guidance, and a conservative drop-in assessment. It is designed to help engineers evaluate whether the MCU fits a fixed-program 8-bit design while separating confirmed specifications from details that still require direct manufacturer-document verification.
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