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Analog Devices Inc./Maxim Integrated DS89C430-ENG
- Part No.:
- DS89C430-ENG
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Microcontrollers
- Package:
- 44-TQFP
- Datasheet:
-
DS89C430-ENG.pdf
- Description:
- IC MCU 8BIT 16KB FLASH 44TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,869
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Product details
Overview
DS89C430-ENG from Maxim Integrated (formerly Dallas Semiconductor) is a 16kB flash, ultra-high-speed 8051-compatible microcontroller executing instructions at 1 clock per machine cycle. It operates up to 33MHz, delivers 33 MIPS performance, features dual data pointers, two full-duplex serial ports, and 1kB MOVX SRAM - enabling real-time control in industrial automation and power management systems.
For engineers reviewing the DS89C430-ENG datasheet, DS89C430-ENG pinout, DS89C430-ENG application, or DS89C430-ENG equivalent, key selection criteria include its 33MHz max clock rate, 16kB on-chip flash with in-system programmability, 44-pin TQFP package, 5V operation, and compatibility with legacy 8051 firmware requiring only timing recalibration.
Technical Context
The DS89C430-ENG implements a redesigned 8051 core eliminating wasted memory cycles: all instructions execute in one system clock cycle (vs. 12 in legacy 8051), achieving up to 12× speed improvement at identical crystal frequency. Its ROMSIZE feature dynamically selects internal program memory size (0–64kB), while variable-length MOVX timing supports flexible external peripheral interfacing.
Power management includes a programmable clock divider (1× to 1024×) and automatic hardware/software exit from idle/stop modes. EMI reduction is enabled by disabling ALE during non-memory-access periods, and early-warning power-fail interrupt (VPFW = 4.2–4.6V) supports graceful shutdown in UPS and energy-control applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Max Clock Frequency | 33MHz - enables 33 MIPS throughput for real-time deterministic control loops. |
| Flash Memory | 16kB - in-application programmable via serial port; supports field firmware updates without hardware rework. |
| SRAM | 1kB MOVX RAM - dedicated fast data space for buffer-intensive tasks like serial protocol handling or sensor aggregation. |
| Operating Voltage | 4.5V to 5.5V - compatible with standard 5V industrial logic rails and tolerant of supply ripple in motor-control environments. |
| Temperature Range | -40°C to +85°C - qualified for deployment in HVAC, building automation, and automotive test equipment enclosures. |
| Reset Threshold | VRST = 3.95–4.35V - ensures reliable boot under brownout conditions; paired with VPFW for pre-reset warning. |
| Power Consumption | ISTOP = 1–100µA (bandgap disabled) - enables battery-backed sleep modes in data loggers and remote sensors. |
Pinout & Package
DS89C430-ENG is housed in a 44-pin Thin Quad Flat Package (TQFP) with 0.8mm lead pitch, optimized for compact industrial PCB layouts and thermal dissipation in enclosed systems.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC (Pin 16, 17, 28, 39) | Primary Power Supply | Multiple VCC pins reduce IR drop and improve noise immunity across high-speed I/O banks. |
| GND (Pin 6, 38) | Logic Ground Reference | Dual ground pins adjacent to VCC support low-impedance return paths for analog-sensitive peripherals. |
| RST (Pin 4) | Bidirectional Reset Input | Internal Schmitt trigger + 50–200kΩ pulldown eliminates need for external RC network; supports wire-OR reset sources. |
| XTAL1/XTAL2 (Pins 14, 15) | Clock Oscillator Interface | Supports fundamental-mode AT-cut crystals (1–33MHz) or external CMOS clock; XTAL1 accepts direct clock input. |
| P0.0–P0.7 (Pins 33–37, 39–42) | Multiplexed Address/Data Bus | Open-drain outputs with weak pullups; latched by ALE for external memory access; tri-state at reset. |
| P2.0–P2.7 (Pins 18–25) | High-Order Address Bus (A8–A15) | Provides MSB address in external memory mode; supports page-mode addressing for faster burst reads/writes. |
| P3.6/P3.7 (Pins 12, 13) | External Memory Strobes | WR and RD signals directly drive external RAM/peripherals; timing configurable via MD bits for slow devices. |
| EA (Pin 29) | External Access Control | High = execute from internal 16kB flash; low = fetch code from external memory - enables hybrid memory architectures. |
Key Features
| Feature | Design Value |
|---|---|
| One-Cycle Instruction Execution | Eliminates 11 redundant clocks per instruction vs. legacy 8051 - cuts latency in time-critical ISR response and PWM generation. |
| Dual Data Pointers (DPTR/DPTR1) | Enables simultaneous source/destination addressing in block moves - accelerates DMA-like operations without CPU overhead. |
| Variable-Length MOVX Timing | Configurable 2–9 machine-cycle delays via MD2:MD0 bits - matches timing to diverse external peripherals (ADCs, displays, EEPROMs). |
| Seven External Interrupt Sources | INT2–INT5 added to standard INT0/INT1 - supports multi-sensor event-driven architectures in industrial monitoring. |
| Programmable Watchdog & Power-Fail Detection | Independent watchdog timer + VPFW/VRST thresholds - ensures fail-safe recovery in unattended systems like HVAC controllers. |
| EMI Reduction Mode | Disables ALE during idle cycles - lowers radiated emissions in EMC-compliant building automation and medical devices. |
Applications
| Industrial Motor Control | Uninterruptible Power Supply (UPS) |
|---|---|
|
Use Scenario: Closed-loop servo control with real-time current sensing and PWM update at ≥20kHz. IC Role / Device Role / Timing Role: Primary controller executing PID calculations, generating synchronized 16-bit PWM, and managing CAN/RS-485 comms. Use Value: 33MHz clock + 1-cycle instructions enable sub-500ns loop latency; dual DPTR accelerates ADC buffer transfers. |
Use Scenario: Battery backup coordination, AC line monitoring, and inverter gate driving during grid failure. IC Role / Device Role / Timing Role: System supervisor managing power sequencing, early-warning brownout response, and serial logging. Use Value: VPFW interrupt triggers graceful shutdown before VRST; 1kB MOVX RAM buffers event logs during power transition. |
| Building Energy Management | Automotive Test Equipment |
|
Use Scenario: Distributed HVAC node aggregating temperature, humidity, and airflow sensor data across RS-485 network. IC Role / Device Role / Timing Role: Edge node processor running Modbus RTU stack, local control logic, and nonvolatile configuration storage. Use Value: 16kB flash stores firmware + calibration tables; two serial ports handle sensor interface and upstream gateway comms. |
Use Scenario: Portable diagnostic tool capturing CAN bus traffic, decoding OBD-II protocols, and displaying results on LCD. IC Role / Device Role / Timing Role: Protocol analyzer core with real-time packet filtering, timestamping, and USB-to-CAN bridging. Use Value: 33 MIPS handles concurrent CAN frame parsing, display refresh, and SD card logging; 44-TQFP fits handheld form factor. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8051-compatible microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DS89C450-ENL+ | 64kB flash (vs. 16kB), same 44-TQFP package, identical pinout and instruction set. | Suitable where larger firmware footprint or future-proofing for feature expansion is required. | Select DS89C450-ENL+ if application demands >16kB code space; otherwise DS89C430-ENG reduces BOM cost and flash programming time. |
| DS87C530-QNL | 16kB flash, 44-PLCC package, 33MHz max, but lacks dual DPTR, variable MOVX timing, and EMI reduction mode. | Acceptable for legacy 8051 drop-in replacement where advanced peripherals are unused. | Choose DS87C530-QNL only when PLCC is mandated and DS89C430-ENG's speed/peripheral advantages are unnecessary. |
Compared with DS89C450-ENL+ and DS87C530-QNL, DS89C430-ENG delivers optimal balance of speed, peripheral richness, and cost for mid-complexity embedded control - offering 33 MIPS and dual serial ports without over-provisioning flash or sacrificing modern power/EMI features.
Availability
DS89C430-ENG is available at Aetrix Electronics and suitable for industrial motor control, uninterruptible power supplies, building energy management, and automotive test equipment requiring stable component supply across long production lifecycles.
Supply support for DS89C430-ENG 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
Maxim Integrated (acquired by Analog Devices in 2021) designs precision analog, mixed-signal, and high-reliability microcontrollers for industrial, automotive, and communications markets.
The DS89C430-ENG belongs to Maxim's ultra-high-speed 8051 microcontroller family, engineered to replace legacy 8051s in performance-constrained applications while preserving software investment and board layout compatibility.
FAQ
What is the maximum operating frequency of the DS89C430-ENG?
The DS89C430-ENG operates at up to 33MHz system clock frequency, delivering 33 million instructions per second (MIPS). This is achieved through a one-clock-per-instruction architecture - a 12× speed improvement over standard 8051 cores at the same crystal frequency. The device supports external crystal oscillators from 1MHz to 33MHz and accepts external CMOS clock inputs meeting tCHCX/tCLCX timing requirements.
Does the DS89C430-ENG support in-system programming (ISP)?
Yes, the DS89C430-ENG supports in-system programming via its primary serial port (P3.0/P3.1) using ROM-resident or user-defined loader software. Its 16kB flash memory is rated for 10,000 write/erase cycles with 100-year data retention. Programming requires no external high-voltage supply - standard 5V operation suffices - and can be performed without removing the device from the target board.
How does the DS89C430-ENG handle power-fail conditions?
The DS89C430-ENG integrates a dedicated power-fail detection circuit with two thresholds: VPFW (4.2–4.6V) triggers an early-warning interrupt for controlled shutdown, and VRST (3.95–4.35V) initiates hardware reset. This dual-threshold design allows firmware to save critical state, flush buffers, or signal upstream systems before voltage collapse - essential in UPS and data-logging applications.
Is the DS89C430-ENG pin-compatible with standard 8051 microcontrollers?
Yes, the DS89C430-ENG is pin-compatible with standard 8051-family devices in the 44-TQFP package, including identical placement of VCC, GND, RST, XTAL1/XTAL2, P0–P3, EA, ALE, PSEN, RD, and WR. However, it adds new functions on P1.0–P1.7 (T2, T2EX, RXD1/TXD1, INT2–INT5), requiring minor PCB routing updates if those features are utilized.
What packaging and RoHS status applies to the DS89C430-ENG?
The DS89C430-ENG is supplied in a 44-pin Thin Quad Flat Package (TQFP) with 0.8mm lead pitch and is RoHS-compliant and lead(Pb)-free, indicated by the "+" suffix in ordering codes (e.g., DS89C430-ENL+). The DS89C430-ENG variant specifically uses this environmentally compliant packaging, meeting IPC/JEDEC J-STD-020 reflow standards.
DS89C430-ENG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 44-TQFP
- Series:
- 89C
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- 8051
- Core Size:
- 8-Bit
- Speed:
- 25MHz
- Connectivity:
- EBI/EMI, SIO, UART/USART
- Peripherals:
- Power-Fail Reset, WDT
- Number of I/O:
- 32
- Program Memory Size:
- 16KB (16K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 1K x 8
- Voltage - Supply (Vcc/Vdd):
- 4.5V ~ 5.5V
- Data Converters:
- -
- Oscillator Type:
- External
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
DS89C430-ENG FAQ
1.How can I place an order for DS89C430-ENG through Aetrix?
Please submit a Request for Quotation (RFQ) for DS89C430-ENG 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 DS89C430-ENG reliable?
The price and inventory of DS89C430-ENG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS89C430-ENG is usually 5 days.
3.What payment methods are accepted for DS89C430-ENG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS89C430-ENG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS89C430-ENG?
DS89C430-ENG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS89C430-ENG 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 DS89C430-ENG?
For technical support, including DS89C430-ENG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS89C430-ENG requirements.
6.How does Aetrix verify that DS89C430-ENG is sourced from the original manufacturer or authorized distributors?
All DS89C430-ENG 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 DS89C430-ENG meets industry standards.
7.What is the process for return or replacement of DS89C430-ENG?
All DS89C430-ENG units undergo pre-shipment inspection (PSI). If there is an issue with DS89C430-ENG, 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 DS89C430-ENG part is unused and in its original packaging.
Return procedure for DS89C430-ENG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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