Z86E3412PSG - 8-Bit 12MHz 16KB OTP MCU | Zilog
MPN: Z86E3412PSG ✓ ActiveZ86E3412PSG Overview
An MCU, or microcontroller, is a single semiconductor integrating a processor core, program memory, data memory, and peripherals on one die. Within the embedded-control hierarchy, the Z8 family belongs to the broader category of 8-bit microcontrollers and combines a compact instruction set with application-specific peripherals. Its OTP memory makes the device suitable for products where firmware is finalized during manufacturing and field reprogramming is unnecessary.
The principal specifications of the Z86E3412PSG are its 8-bit CPU architecture, 12 MHz maximum clock frequency, and 16 KB OTP program memory organized as 16K x 8. The device is identified as a CMOS Z8 microcontroller, while the manufacturer and distributor listings place it in the 28-pin DIP class. These characteristics distinguish it from devices that require external program memory or provide flash-based field updates.
The Z86E3412PSG belongs to the Z86E3412 family and is designed for embedded control rather than high-performance computing. OTP program storage gives the manufacturer a defined, permanently programmed firmware path and can support repeatable production across an appliance or controller. The 12 MHz operating rate provides more timing headroom than many low-pin-count 8-bit controllers while retaining the simplicity of a compact MCU architecture.
Typical applications include dedicated appliance controllers, small motor-control boards, keypads, sensor-interface modules, and simple sequence controllers. Its 28-pin DIP format is useful for prototypes, repairable assemblies, and through-hole production where a QFP package would be unnecessary. A system designer should verify peripheral assignments, interrupt behavior, and timing requirements against the device's pin description and application information.
A critical design consideration is that OTP memory cannot be erased and rewritten in the field. Firmware changes therefore require a new programmed device or a board-level replacement strategy. Decoupling, oscillator layout, I/O drive, and programming should be implemented according to the manufacturer datasheet, especially in electrically noisy motor or relay-control environments.
This product page combines the manufacturer device identity with focused design guidance, verified package and memory details, application analysis, and same-family replacement considerations. It is intended to help engineers confirm fit, assess programming constraints, and plan a reliable embedded-control implementation before requesting an order.
Drop-in alternatives for Z86E3412PSG — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Z86E3412PSC
✅ Drop-In📋 Reference alternative (not in catalog)
Z86E3412FSG
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
Z86E3412FSC
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
Z86E3412PSG Maximum Ratings & Electrical Characteristics
| Microcontroller Type | 8-bit CMOS Z8 microcontroller |
| Maximum Clock Frequency | 12 MHz |
| Program Memory Type | One-time programmable (OTP) |
| Program Memory Size | 16 KB |
| Program Memory Organization | 16K x 8 bits |
| Minimum Operating Supply Voltage | 5.00 V |
| Maximum Operating Supply Voltage | 5.50 V |
| Package Type | 28-pin DIP through-hole package |
| Number of Pins | 28 pins |
| Mounting Style | Through-hole |
| CPU Architecture | 8-bit |
| Process Technology | CMOS |
| Series | Z8 Z8 |
| Device Family | Z86E3412 |
Z86E3412PSG 28-pin dip through-hole package Pin Configuration Guide
Pin configuration for Z86E3412PSG (28-pin dip through-hole package package). This digital IC includes GPIO, communication interfaces (UART, SPI, I2C), and power pins. Refer to the manufacturer datasheet for alternate pin functions and configuration options. Essential for embedded system design and PCB layout.
No detailed pinout data available for Z86E3412PSG.
Refer to the datasheet for full pin configuration.
Typical Applications
Z86E3412PSG is suitable for 6 applications: Small Appliance Controllers, Keypad and Access-Control Panels, Sensor Interface Modules, Simple Motor Sequence Controllers, LED and Indicator Sequencers, Legacy Through-Hole Control Boards.
Small Appliance Controllers
The Z86E3412PSG fits dedicated appliance controllers where an 8-bit CPU, 12 MHz operating speed, and 16 KB of OTP firmware are sufficient for sequencing and user-interface logic. Its permanent program memory supports production-oriented controls whose firmware does not require routine field rewriting. The 28-pin DIP package also simplifies through-hole assembly and repair compared with a fine-pitch surface-mount MCU. Engineers should allocate pins for user controls, indicators, and actuator commands only after checking the datasheet's fixed pin assignments and peripheral multiplexing.
Keypad and Access-Control Panels
A 12 MHz Z8 microcontroller can scan keys, manage indicator states, and execute control sequences within a compact keypad or access-control panel. The Z86E3412PSG's 16 KB OTP program memory is useful for fixed firmware implementing debounce, input handling, lock-control logic, and status feedback. Because OTP cannot be updated in the field, the panel configuration must be fixed before programming or paired with a serviceable upstream controller. Confirm the required key-scan I/O count and any serial interface against the 28-pin pin description.
Sensor Interface Modules
The Z86E3412PSG can serve as the control element in a small sensor-interface module that converts discrete sensor inputs into processed status or switching outputs. Its 8-bit architecture is appropriate for digital thresholding, counting, debounce, and configuration logic rather than intensive signal processing. Operation at up to 12 MHz provides deterministic timing margin for scanning multiple inputs. The 5.00 V to 5.50 V supply range supports conventional 5 V systems, while the designer must ensure sensor signal levels and analog front-end requirements remain separate from the MCU supply constraints.
Simple Motor Sequence Controllers
The Z86E3412PSG is suitable for low-complexity motor sequencing, timed actuator control, and small stepper or relay-control systems where logic-level sequencing is required. Its 12 MHz clock and 8-bit instruction set can coordinate motion steps, limit inputs, and timed transitions. The microcontroller should not drive motor current directly; external transistor or driver circuitry, flyback protection, and appropriate logic-level translation are required. Because OTP memory limits post-deployment changes, safety sequences and timing tables should be thoroughly validated before programming.
LED and Indicator Sequencers
The Z86E3412PSG can control LED arrays, status indicators, and programmable visual sequences in compact controllers. The 12 MHz clock provides ample execution margin for timing loops and update routines, while 16 KB of OTP holds a complete fixed lighting or indication program. GPIO drive capability, port availability, and any current limits must be checked for each indicator directly in the manufacturer datasheet. External transistor drivers are appropriate when indicator current or polarity handling exceeds the MCU's direct output capability.
Legacy Through-Hole Control Boards
The 28-pin DIP package makes the Z86E3412PSG well suited to legacy through-hole control boards, prototypes, repair assemblies, and educational platforms that favor socketed DIP devices. The 8-bit Z8 core operates at up to 12 MHz with 16 KB of OTP memory, covering embedded sequencing, input scanning, and output control. Drop-in board reuse still requires complete confirmation of power, oscillator, programming, I/O, and reset pin assignments. Firmware must be considered part of the hardware configuration because OTP programming is permanent.
Engineering reference data for Z86E3412PSG — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | Z86E3412PSC | Z86E3412FSG | Z86E3412FSC |
|---|---|---|---|---|
| Brand | Zilog, Inc. | Zilog, Inc. | Zilog, Inc. | Zilog, Inc. |
| Package | DIP-28 | DIP-28 | DIP-28 | DIP-28 |
| CPU Architecture | 8-bit | 8-bit | 8-bit | 8-bit |
| Maximum Clock Frequency | 12 MHz | 12 MHz | 12 MHz | 12 MHz |
| Program Memory | 16 KB OTP | 16 KB OTP | 16 KB OTP | 16 KB OTP |
| Program Memory Organization | 16K x 8 bits | 16K x 8 bits | 16K x 8 bits | 16K x 8 bits |
| Operating Supply Range | 5.00 V to 5.50 V | 5.00 V to 5.50 V | 5.00 V to 5.50 V | 5.00 V to 5.50 V |
| Package Material Designation | PSG plastic DIP | PSC ceramic DIP | FSG grade and package suffix | FSC grade and ceramic package suffix |
Key Differentiators
- Permanent OTP program-memory architecture (vs ATMEGA168-20PU)
- Same 12 MHz core speed across the compared Z86E3412 package variants (vs Z86E3412PSC)
- Same 16 KB memory architecture across the compared family variants (vs Z86E3412FSC)
Design Notes
Plan firmware revisions around the one-time-programmable memory architecture. The 16 KB program memory cannot be erased for a normal firmware update, so a corrected program normally requires a newly programmed MCU or a replacement at board level. Freeze requirements early, validate the complete image before programming, and define how field failures will be handled if the product is not designed for alternate control.
Follow the manufacturer pin table and DIP footprint exactly, including pin-1 orientation and the socket or solder-joint layout. Place the required bypass capacitors close to the supply and ground pins, and route oscillator and programming signals away from noisy switching stages. Before committing the PCB, compare the actual footprint, pin numbering, and maximum package dimensions with the manufacturer drawing.
For relay, motor, or mains-adjacent control boards, keep the Z86E3412PSG and its programming interface away from high-energy switching paths. Use a clear separation between logic and power wiring, provide local supply decoupling, and route return currents directly to the ground plane. Add appropriate snubbers or flyback networks at inductive loads to reduce coupling into the MCU's supply and I/O pins.
Compliance Information
The device is a general-purpose 8-bit embedded MCU rather than an automotive-qualified product; no specific RoHS, REACH, lead-free, halogen-free, or conflict-minerals declaration was identified for this ordering code.
