DF2166VT33V - H8S/2100 16-bit MCU 33MHz 512KB Flash | Renesas
MPN: DF2166VT33V ✓ Active| Qty | Unit Price | Extended |
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| 1 | $0 | $0.00 |
| 10 | $0 | $0.00 |
| 100 | $0 | $0.00 |
| 500 | $0 | $0.00 |
| 1,000 | $0 | $0.00 |
DF2166VT33V Overview
A microcontroller (MCU) is a single-chip computer integrating a CPU core, program memory, data memory, and peripherals such as timers, serial interfaces, and analog converters. Within the semiconductor hierarchy, the H8S/2100 sits in the 16-bit microcontroller category, positioned between 8-bit MCUs for simple control tasks and 32-bit MCUs for compute-heavy embedded systems. MCUs of this class are the backbone of industrial control boards, motor drives, and instrumentation front ends.
Key differentiating specifications include the 512KB flash program memory - large for a 16-bit core - supporting complex firmware with in-field update capability; 40KB of on-chip RAM for buffering and protocol stacks; 106 general-purpose I/O lines for dense peripheral interfacing; and on-chip peripherals including LPC, CRC, H8S serial interfaces, and JTAG boundary scan for board-level test. The 33 MHz maximum clock delivers roughly 16.5 MIPS-class throughput on the H8S CISC architecture.
The DF2166VT33V operates from a single 3.0V to 3.6V supply (Vcc), simplifying power design in 3.3V logic systems, and its device suffix indicates the V-speed grade and 3.3V operating class. The package code PTQP0144LC-A corresponds to a JEDEC-compliant lead-free 144-TQFP (16x16 mm body) suitable for surface-mount assembly with standard reflow profiles. The operating temperature range is -20C to +75C, targeting commercial and light-industrial environments rather than automotive or extended-temperature applications.
Typical applications include industrial automation controllers, embedded instrumentation, motor control and inverter panels, building control, and legacy telecommunications equipment where the H8S instruction-set compatibility protects existing firmware investments.
A key design consideration is memory wait-state configuration: at the full 33 MHz clock, verify flash access wait states and bus settings per the Renesas hardware manual to avoid illegal-access resets, and decouple all Vcc pins with 0.1uF ceramics placed at each corner of the 144-TQFP.
This page synthesizes distributor pricing, drop-in alternative analysis, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for DF2166VT33V — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DF2167VT33V
✅ Drop-In📋 Reference alternative (not in catalog)
DF2166VT33WV
✅ Drop-In📋 Reference alternative (not in catalog)
DF2168VT33V
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DF2166TTF13V
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DF2166VT33V Maximum Ratings & Electrical Characteristics
| Core Architecture | H8S/2000 (H8S/2100 family, 2168 Group) |
| Core Width | 16-bit CISC |
| Maximum Clock Frequency | 33 MHz |
| Program Memory Size | 512 KB (512K x 8) Flash |
| RAM Size | 40 KB (40K x 8) |
| Number of I/O | 106 |
| Supply Voltage (Vcc) | 3.0 V to 3.6 V |
| Operating Temperature | -20C to +75C |
| Package / Case | 144-TQFP (16x16 mm) |
| Package Code | PTQP0144LC-A |
| Mounting Type | Surface Mount |
| Peripherals | LPC, CRC, H8S serial, Boundary scan (JTAG) |
| RoHS / Pb-Free | Pb-Free, JEDEC compliant |
| Family | H8S/2000 H8 H8S/2100 |
| Program Memory Type | FLASH |
| Core Supplier Series | H8S/2168 Group |
DF2166VT33V ptqp0144lc-a Pin Configuration Guide
Pin configuration for DF2166VT33V (ptqp0144lc-a 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 DF2166VT33V.
Refer to the datasheet for full pin configuration.
Typical Applications
DF2166VT33V is suitable for 6 applications: Industrial Automation Controllers, Embedded Instrumentation, Motor Control and Inverter Panels, Building Control and HVAC, Legacy Telecommunications Equipment, Security and Access Control Systems.
Industrial Automation Controllers
The DF2166VT33V fits industrial automation controllers because its 33 MHz 16-bit H8S core, 512KB flash, and 106 I/O lines provide the throughput and connectivity density needed for PLC-style sequencing, sensor polling, and actuator drive logic. Its on-chip CRC accelerates communication integrity checks on Modbus-class links, while JTAG boundary scan simplifies production test of dense I/O boards. In a typical deployment, the MCU runs control firmware from flash while a 3.3V rail powers the entire logic domain directly, eliminating level shifting against external 3.3V peripherals. The main trade-off versus a 32-bit MCU is integer-only arithmetic, which is acceptable for ladder-logic-class control loops up to the kHz range but not for high-resolution motion planning.
Recommended
Embedded Instrumentation
Bench and field instrumentation benefits from the DF2166VT33V's combination of 512KB flash - ample for menus, calibration tables, and communication stacks - and 40KB RAM for data buffering. The 3.0V to 3.6V supply range matches common 3.3V analog front-end rails, and the -20C to +75C rating covers typical laboratory and light-industrial environments. Firmware stores in flash allows field updates through the H8S serial bootloader, a practical advantage for deployed instruments. In a typical design, the MCU reads an external ADC over a serial interface and drives a display plus serial port; the H8S CISC core's predictable execution simplifies timing-critical acquisition sequencing. The limitation is the absence of a hardware floating-point unit, so DSP-heavy instruments should offload math to a companion DSP.
Recommended
Motor Control and Inverter Panels
Low- and medium-complexity motor drives use the DF2166VT33V for sequencing, protection monitoring, and host communication, leveraging its 106 I/O lines to interface gate drivers, current-sense comparators, and fault latches. The 33 MHz clock provides deterministic interrupt latency for overcurrent protection loops, while the CRC peripheral validates control messages on field buses. Operated from a 3.3V rail with 5V-tolerant H8S I/O characteristics noted in family documentation, it bridges cleanly to legacy 5V signal conditioning stages common in retrofit panels. In a typical topology, this MCU supervises while a dedicated gate-driver IC handles PWM power stages. Its -20C to +75C range suits enclosed panels; extended outdoor ambient requires derating review against the Renesas datasheet.
Recommended
Building Control and HVAC
Building automation nodes benefit from the DF2166VT33V's large 512KB flash, which holds protocol stacks, schedules, and logging tables without external memory, and its 40KB RAM for network buffering. The 3.0V to 3.6V supply supports battery-backed or mains-derived 3.3V domains, and the 106 I/O lines accommodate relay drives, damper actuators, and multiple sensor buses simultaneously. JTAG boundary scan supports in-production testing of the dense I/O boards typical of controllers. In a typical node, the MCU polls sensors, executes PID loops for temperature control, and communicates over RS-485-class serial links using the H8S on-chip serial units with CRC validation. The mature H8S toolchain and stable silicon are advantages for long-lifecycle building products with decade-long service expectations.
Recommended
Legacy Telecommunications Equipment
The H8S family has a long heritage in telecom line-card and network-equipment supervision, and the DF2166VT33V maintains that role: 512KB flash stores firmware including management interfaces, 40KB RAM buffers packet metadata, and the 16-bit CISC core at 33 MHz handles supervisory tasks with predictable timing. JTAG boundary scan supports the high pin-count board test procedures standard in telecom manufacturing, and the JEDEC-compliant lead-free 144-TQFP meets modern assembly requirements even for legacy designs being re-released. In a typical application, the MCU monitors power supplies, fans, and alarms, reporting to a backplane controller over serial links with CRC-checked frames. The -20C to +75C rating covers central-office environments; outside-plant deployments need a hardened enclosure.
Recommended
Security and Access Control Systems
Access-control panels and surveillance controllers leverage the DF2166VT33V's 512KB flash for credential databases and event logs, its 106 I/O lines for keypad, reader, lock, and sensor interfacing, and its CRC peripheral for tamper-evident serial communication. The 3.0V to 3.6V single-supply operation simplifies power design in mixed 3.3V/12V security panels, with the MCU isolated on the logic rail. Flash-based firmware supports on-site updates when security policies change, and boundary scan eases manufacturing test of the dense I/O boards. In a typical controller, the MCU runs the decision engine and communicates upstream over RS-485. The -20C to +75C range covers protected indoor installations; unheated gate enclosures should be evaluated against the datasheet limits.
Recommended
Recommended Products Summary
Engineering reference data for DF2166VT33V — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DF2167VT33V | DF2166VT33WV | DF2168VT33V |
|---|---|---|---|---|
| Package | 144-TQFP (16x16 mm, PTQP0144LC-A) | 144-TQFP class - same | 144-TQFP class (different suffix package option) | 144-TQFP class - same |
| Brand | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics |
| Core / Width | H8S 16-bit CISC | H8S 16-bit CISC | H8S 16-bit CISC | H8S 16-bit CISC |
| Peripheral Set / Group | 2168 Group: LPC, CRC, H8S serial, boundary scan | 2167 Group (different peripheral map) | 2166/2168 Group - same | 2168 Group |
Key Differentiators
- Largest flash in its H8S class (vs DF2167VT33V)
- Highest I/O count for dense boards (vs DF2166VT33WV)
- Integrated test and integrity peripherals (vs DF2168VT33V)
Design Notes
Power the DF2166VT33V from a regulated 3.3V rail within the 3.0V to 3.6V datasheet window. Place 0.1uF ceramic decoupling capacitors at each of the four Vcc pin groups on the 144-TQFP, plus one 4.7-10uF bulk capacitor near the device. Because the flash core draws transient current at 33 MHz, keep the power plane impedance low under the package center. Verify power-up ramp rate against the Renesas H8S hardware manual oscillator/latch-up requirements; if the rail ramps slowly, add a supervisor reset (e.g., a voltage-monitor reset IC) to hold the RES pin valid until Vcc stabilizes.
The PTQP0144LC-A 144-TQFP has 0.5 mm lead pitch; design land patterns per the Renesas package drawing rather than generic IPC calculators to ensure reliable solder fillets. Route the JTAG boundary-scan pins to a test header if in-circuit test is planned - the on-chip boundary scan is most useful when the chain is accessible. Keep crystal/oscillator traces short and guard them with ground, since the H8S clock input is sensitive to coupling from switching loads. For rework, the 16x16 mm body allows hot-air removal but requires a preheater below the board.
Do not assume all family suffixes are interchangeable: the 'V' in DF2166VT33V denotes the 33 MHz / 3.3V class, and the WV variant uses a different package option - verify the mechanical drawing before reusing a footprint. Also confirm flash wait-state and bus settings at full 33 MHz clock per the H8S hardware manual; running with incorrect wait states can cause illegal-access resets. Finally, the -20C to +75C rating excludes automotive-grade use; do not deploy this commercial-grade part in under-hood or extended-temperature environments.
Compliance Information
Mouser lists the part as 'Pb-Free 144-TQFP JEDEC', indicating lead-free, JEDEC-compliant packaging. Not an automotive (AEC-Q100) device - commercial -20C to +75C rating. Formal REACH and conflict-minerals declarations should be requested from Renesas for the exact ordering code.
