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Analog Devices Inc./Maxim Integrated DS89C430-QNG
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- Part No.:
- DS89C430-QNG
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Microcontrollers
- Package:
- 44-LCC (J-Lead)
- Datasheet:
-
DS89C430-QNG.pdf
- Description:
- IC MCU 8BIT 16KB FLASH 44PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:1,231
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Product details
Overview
DS89C430-QNG from Maxim Integrated is a 16kB flash, 8051-compatible ultra-high-speed microcontroller executing instructions at 1 clock per machine cycle, achieving up to 33 MIPS at 33MHz with DC–33MHz operation and single-cycle instruction execution in 30ns. It features dual data pointers, two full-duplex serial ports, and operates across –40°C to +85°C for industrial control and data logging systems.
For engineers reviewing the DS89C430-QNG datasheet, DS89C430-QNG pinout, DS89C430-QNG application, or DS89C430-QNG equivalent, key selection factors include its 16kB on-chip flash memory, 44-pin PLCC package, 33MHz max clock, 1kB MOVX SRAM, and compatibility with legacy 8051 software-requiring timing validation for high-speed interrupt response and external memory interface timing.
Technical Context
The DS89C430-QNG implements a redesigned 8051 core with one-clock-per-cycle execution, eliminating the 12-clock overhead of legacy 8051s. Its PMR register controls clock division (1× to 1024×) and crystal multiplier modes, enabling flexible system clock derivation from 1–33MHz external sources.
It supports five memory-access page modes (including 1-, 2-, and 4-cycle variants), configurable MOVX timing via MD2:MD0 bits (2–9 machine cycles), and ROMSIZE feature dynamically selecting internal program memory size (0–64kB), allowing full external address map access without hardware changes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | High-speed 8051, 1 clock per machine cycle - eliminates 12× timing penalty of standard 8051, enabling direct replacement with speed-up verification |
| Max Clock Frequency | 33MHz - delivers 33 MIPS performance; supports crystal (1–33MHz) or external clock input |
| Flash Memory | 16kB - in-application and in-system programmable via serial port; 10,000 write/erase cycles, 100-year data retention |
| RAM | 1kB SRAM for MOVX - dedicated external-data-space RAM accessible via DPTR/DPTR1, separate from 256B internal RAM |
| Supply Voltage | 4.5V to 5.5V - operates over full industrial range; includes power-fail reset (VRST = 3.95–4.35V) and early-warning interrupt (VPFW = 4.2–4.6V) |
| I/O Ports | Four 8-bit bidirectional ports (P0–P3) - P0 open-drain with weak pullups in bus mode; P1/P2/P3 quasi-bidirectional with strong pulldown on write-0 |
| Interrupt System | 13 sources, 5 priority levels - includes six external interrupts (INT0–INT5), programmable watchdog timer, and power-fail interrupt |
Pinout & Package
DS89C430-QNG is housed in a 44-pin Plastic Leaded Chip Carrier (PLCC) package with J-lead configuration, lead-free/RoHS-compliant (QNG suffix), and 1.27mm pitch. Pin 1 is marked by a notch; orientation follows standard PLCC top-view numbering (pin 1 at top-left corner).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC (Pin 12, 22, 23, 34) | Power supply | +5V main supply; four pins reduce IR drop and improve noise immunity in high-speed operation |
| GND (Pin 1, 2, 23, 34) | Ground reference | Dedicated ground pins adjacent to VCC enhance power integrity and EMI reduction |
| RST (Pin 10) | Reset input/output | Bidirectional Schmitt-trigger input with internal 50–200kΩ pulldown; enables wire-OR reset networks without external RC |
| XTAL1 (Pin 21), XTAL2 (Pin 20) | Clock oscillator interface | Supports fundamental-mode AT-cut crystals (1–33MHz); XTAL1 accepts external clock source when crystal omitted |
| P0.0–P0.7 (AD0–AD7, Pins 39–32) | Multiplexed address/data bus | Open-drain I/O; latched by ALE for external memory access; requires pullups only in pure I/O mode |
| P2.0–P2.7 (A8–A15, Pins 21–28) | Upper address bus / I/O | Provides MSB of external address in nonpage mode; supplies both address and data in page mode 2 |
| P3.6 (WR), P3.7 (RD) | External memory strobes | Active-low write/read strobes synchronized to ALE; timing configurable per MOVX page mode |
| EA (Pin 31) | External access select | Low = force external program memory; high = execute from internal 16kB flash; enables seamless boot-from-flash design |
Key Features
| Feature | Design Value |
|---|---|
| Variable-length MOVX timing | Configurable 2–9 machine-cycle delays via MD2:MD0 bits - matches timing requirements of slow peripherals without software wait states |
| Dual data pointers (DPTR/DPTR1) | Independent auto-increment/decrement and toggle-select - accelerates block memory moves and DMA-like operations in firmware |
| EMI reduction mode | Disables ALE during idle periods - reduces radiated emissions in sensitive industrial or medical environments without affecting functionality |
| ROMSIZE dynamic memory mapping | Software-selectable internal program memory size (0–64kB) - allows runtime switching between flash and external code space |
| Power management clock divider | Programmable 1× to 1024× CPU clock scaling - extends battery life in low-power modes while retaining full interrupt responsiveness |
| Early warning power-fail interrupt | Separate VPFW threshold (4.2–4.6V) triggers interrupt before reset - enables graceful shutdown, data save, or state preservation |
Applications
| Data Logging Systems | Industrial HVAC Controllers |
|---|---|
Use Scenario: Continuous sensor sampling (temperature, humidity, pressure) with timestamped storage to SD card or flash memory. IC Role / Device Role: Main controller managing ADC interfaces, real-time clock, serial comms (RS-485), and nonvolatile storage writes. Use Value: 33MHz execution enables sub-millisecond sampling intervals and concurrent background logging without missing critical events. |
Use Scenario: Zone-based temperature regulation with modulating valves, fan speed control, and BACnet/IP gateway functions. IC Role / Device Role: Real-time process controller interfacing with analog inputs, PWM outputs, and dual serial ports for fieldbus and HMI communication. Use Value: Dual serial ports (UART0 + UART1) support simultaneous Modbus RTU and local debug comms; 16kB flash hosts full control algorithm and protocol stack. |
| Uninterruptible Power Supplies (UPS) | Automotive Test Equipment |
Use Scenario: Monitoring AC input, battery voltage, load current, and inverter output with fast switchover logic and event logging. IC Role / Device Role: Safety-critical supervisor handling brownout detection, power-fail interrupt, watchdog reset, and relay control sequencing. Use Value: Hardware power-fail reset (VRST) and early-warning interrupt (VPFW) ensure deterministic shutdown within 100μs of voltage sag - preserving EEPROM integrity. |
Use Scenario: Portable diagnostic tool capturing CAN/LIN bus traffic, interpreting OBD-II protocols, and displaying results on LCD. IC Role / Device Role: Embedded host processor running protocol parser, display driver, and USB-to-serial bridge firmware. Use Value: 1kB MOVX SRAM buffers high-speed CAN message bursts; 33 MIPS throughput handles real-time filtering and timestamping without packet loss. |
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-QNL | 64kB flash (vs. 16kB), identical pinout/package, same core/peripherals | Suitable where larger firmware image or bootloader+application separation is required | Select DS89C450-QNL if future firmware expansion or secure boot partitioning is needed; no PCB change required |
| DS87C520-QN | Lower max speed (33MHz vs. 33MHz), 16kB flash, but 12-clock-per-cycle legacy timing; no ROMSIZE or dual DPTR | Preferred for drop-in replacement where existing 8051 timing-critical code must run unchanged | Choose DS87C520-QN only when migrating legacy 8051 designs without modifying timing-sensitive ISRs or delay loops |
Compared with DS89C430-QNG, DS89C450-QNL offers scalable flash capacity without altering layout or firmware architecture, while DS87C520-QN trades speed and modern features for guaranteed timing compatibility - making DS89C430-QNG optimal for new designs prioritizing performance-per-clock and peripheral flexibility.
Availability
DS89C430-QNG is available at Aetrix Electronics and suitable for industrial control, data logging, and uninterruptible power supply applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for DS89C430-QNG 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 (now part of Analog Devices) designs precision analog, mixed-signal, and high-reliability semiconductor solutions for industrial, automotive, and communications markets.
The DS89C430-QNG belongs to Maxim's Ultra-High-Speed Flash Microcontroller family, engineered to deliver 12× faster 8051 performance while maintaining full software compatibility - targeting cost-sensitive, timing-critical embedded systems needing upgrade paths from legacy MCS-51 platforms.
FAQ
What is the maximum operating frequency and instruction throughput of the DS89C430-QNG?
The DS89C430-QNG operates up to 33MHz with a one-clock-per-machine-cycle core, delivering 33 million instructions per second (MIPS). At this rate, the fastest instructions execute in 30ns. Its AC characteristics guarantee timing compliance across –40°C to +85°C with VCC = 4.5V–5.5V, and it supports external clock inputs or fundamental-mode crystals from 1MHz to 33MHz.
Does the DS89C430-QNG support in-system programming, and what interface is used?
Yes, the DS89C430-QNG supports in-system programming (ISP) and in-application programming (IAP) via its primary serial port (UART0 on P3.0/P3.1). Programming is performed using ROM-resident loader firmware or user-defined loaders, requiring no external high-voltage signals. The 16kB flash memory sustains 10,000 write/erase cycles with 100-year data retention, verified per manufacturer specifications.
How does the DS89C430-QNG handle power-fail conditions, and what thresholds are guaranteed?
The DS89C430-QNG integrates a hardware power-fail reset circuit with a guaranteed trip point VRST of 3.95V–4.35V and an early-warning interrupt threshold VPFW of 4.2V–4.6V. These voltages are specified under VCC = 4.5V–5.5V and –40°C to +85°C. The separation between VPFW and VRST is hardware-guaranteed, enabling deterministic fail-safe shutdown before reset assertion.
Is the DS89C430-QNG pin-compatible with standard 8051 microcontrollers in the 44-pin PLCC package?
Yes, the DS89C430-QNG is pin-compatible with standard 8051-family devices in the 44-pin PLCC package (e.g., DS80C320-QN), retaining identical signal assignments for P0–P3, RST, XTAL1/XTAL2, EA, PSEN, ALE/PROG, RD, and WR. However, software timing validation is required due to its 12× faster execution - especially for delay loops, serial baud rates, and external memory interface handshaking.
What memory configuration options does the DS89C430-QNG provide for external addressing?
The DS89C430-QNG implements the ROMSIZE feature, allowing software to dynamically configure internal program memory size from 0kB to 64kB. When set to 0kB, the full 64kB external address space becomes accessible regardless of EA pin state. This enables runtime switching between internal flash and external memory without hardware modification - a capability not present in legacy 8051 derivatives.
DS89C430-QNG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 44-LCC (J-Lead)
- Series:
- 89C
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- 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-QNG FAQ
1.How can I place an order for DS89C430-QNG through Aetrix?
Please submit a Request for Quotation (RFQ) for DS89C430-QNG 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-QNG reliable?
The price and inventory of DS89C430-QNG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS89C430-QNG is usually 5 days.
3.What payment methods are accepted for DS89C430-QNG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS89C430-QNG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS89C430-QNG?
DS89C430-QNG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS89C430-QNG 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-QNG?
For technical support, including DS89C430-QNG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS89C430-QNG requirements.
6.How does Aetrix verify that DS89C430-QNG is sourced from the original manufacturer or authorized distributors?
All DS89C430-QNG 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-QNG meets industry standards.
7.What is the process for return or replacement of DS89C430-QNG?
All DS89C430-QNG units undergo pre-shipment inspection (PSI). If there is an issue with DS89C430-QNG, 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-QNG part is unused and in its original packaging.
Return procedure for DS89C430-QNG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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