My Inquiry
My Account
Analog Devices Inc./Maxim Integrated DS89C430-QNL+
.jpg)
- Part No.:
- DS89C430-QNL+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Microcontrollers
- Package:
- 44-LCC (J-Lead)
- Datasheet:
-
DS89C430-QNL+.pdf
- Description:
- IC MCU 8BIT 16KB FLASH 44PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:222
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
DS89C430-QNL+ from Maxim Integrated is a RoHS-compliant, 16kB flash, 44-pin PLCC ultra-high-speed 8051-compatible microcontroller delivering 33 MIPS at 33MHz with single-cycle instruction execution (30ns), dual data pointers, and two full-duplex serial ports. It targets industrial control, HVAC, and data logging systems requiring deterministic real-time response and in-system programmability.
For engineers reviewing the DS89C430-QNL+ datasheet, DS89C430-QNL+ pinout, DS89C430-QNL+ application, or DS89C430-QNL+ equivalent, key selection criteria include its 33MHz max clock, 16kB on-chip flash with 10,000 write/erase cycles, 1kB MOVX SRAM, power-fail reset, and EMI reduction mode-critical for embedded systems operating in electrically noisy environments.
Technical Context
The DS89C430-QNL+ implements a fully static CMOS 8051-compatible core executing instructions in one system clock cycle (vs. 12 in legacy 8051), enabling 33 MIPS at 33MHz. Its architecture supports five interrupt priority levels, 13 interrupt sources (six external), and programmable clock division down to 1/1024 for low-power operation.
It integrates dual data pointers with automatic increment/decrement and toggle select, variable-length MOVX timing (2–9 machine cycles), ROMSIZE feature for dynamic internal memory size selection (0–64kB), and hardware power-fail detection with early-warning interrupt-enabling robust data retention during brownout events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Max Clock Frequency | 33MHz - enables 33 MIPS throughput with single-cycle instruction execution |
| Flash Memory | 16kB - in-application and in-system programmable via serial port; 100-year data retention |
| SRAM | 1kB MOVX RAM - dedicated fast-access data memory for external bus operations |
| Supply Voltage | 4.5V to 5.5V - supports industrial-grade voltage tolerance with 4.125V reset trip point |
| Operating Temperature | -40°C to +85°C - qualified for extended industrial ambient conditions |
| Power-Fail Detection | VPFW = 4.375V (typ) - triggers early-warning interrupt before reset threshold (VRST = 4.125V) |
| Instruction Cycle Time | 30ns at 33MHz - eliminates wasted clocks per machine cycle vs. legacy 8051 |
Pinout & Package
DS89C430-QNL+ uses a 44-pin Plastic Leaded Chip Carrier (PLCC) package with J-lead configuration, 1.27mm pitch, and body size 16.5mm × 16.5mm. Pin 1 is index corner, counterclockwise numbering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC (Pins 1, 22, 23, 34) | Power Supply | +5V main supply with 4.5–5.5V operating range; four pins reduce IR drop and improve noise immunity |
| GND (Pins 12, 44) | Logic Ground | Dedicated ground reference for analog/digital sections; dual pins minimize ground bounce |
| RST (Pin 10) | Reset Input/Output | Bidirectional Schmitt-trigger input with internal 120kΩ pulldown; supports wire-OR reset sources without external RC |
| XTAL1/XTAL2 (Pins 21, 20) | Clock Oscillator Interface | Supports fundamental-mode AT-cut crystals (1–33MHz) or external clock source; XTAL1 accepts TTL-level input |
| P0.0–P0.7 (Pins 43–36) | Multiplexed Address/Data Bus | Open-drain I/O with weak pullups; latched by ALE for external memory access; tri-state on reset |
| P1.0–P1.7 (Pins 2–9) | General-Purpose I/O | Strong pulldown on write-0; weak pullup on reset; supports T2, RXD1/TXD1, and INT2–INT5 functions |
| P2.0–P2.7 (Pins 24–31) | High-Order Address Bus | Provides A8–A15 during external memory access; supports page mode addressing and dual-role in page mode 2 |
| P3.0–P3.7 (Pins 11–19) | Multiplexed I/O/Control | Includes RXD0/TXD0, INT0/INT1, T0/T1, WR/RD strobes; RD/WR drive external memory with 3.2mA sink capability |
| EA (Pin 35) | External Access Control | Active-high signal selecting internal flash (EA = VCC) or external program memory (EA = GND) |
| ALE/PROG (Pin 32) | Address Latch Enable | Drives external latch (e.g., 74LS373); pulse width configurable per page mode; doubles as parallel programming input |
| PSEN (Pin 33) | Program Store Enable | Active-low chip enable for external program memory; remains low during consecutive page hits in page mode 1 |
Key Features
| Feature | Design Value |
|---|---|
| One-Cycle Instruction Execution | Eliminates 11 redundant clocks per instruction cycle vs. legacy 8051, enabling 12× speedup at same crystal frequency |
| Dual Data Pointers (DPTR/DPTR1) | Accelerates block memory moves with automatic increment/decrement and toggle-select switching between pointers |
| Variable-Length MOVX Timing | Configurable 2–9 machine cycle delays for external peripheral interfacing, eliminating need for external wait-state generators |
| EMI Reduction Mode | Disables ALE during idle periods when external memory is not accessed, reducing radiated emissions in sensitive applications |
| Power-Fail Early Warning | Generates interrupt at VPFW = 4.375V (typ), allowing firmware to save critical data before VRST = 4.125V reset occurs |
| ROMSIZE Dynamic Selection | Software-configurable internal program memory size (0–64kB), enabling flexible memory mapping without hardware changes |
Applications
| Industrial Control and Automation | HVAC Systems |
|---|---|
Use Scenario: Real-time monitoring and closed-loop control of motor drives, sensors, and actuators in factory automation PLCs. IC Role / Device Role / Timing Role: Primary controller executing deterministic control loops with sub-100μs interrupt latency and dual serial comms for HMI and fieldbus bridging. Use Value: 33MHz clock and single-cycle instructions ensure consistent loop timing; 1kB MOVX RAM buffers sensor data streams without external memory latency. | Use Scenario: Centralized management of temperature, airflow, and energy consumption across multi-zone commercial HVAC units. IC Role / Device Role / Timing Role: System-on-module host managing RS-485 Modbus RTU communication, analog sensor acquisition, and relay actuation. Use Value: Two full-duplex UARTs support simultaneous Modbus master/slave operation; power-fail warning preserves setpoint history during grid fluctuations. |
| Data Logging | Uninterruptible Power Supplies |
Use Scenario: Battery-backed environmental data recorder capturing temperature, humidity, and voltage readings at 1Hz over 30-day intervals. IC Role / Device Role / Timing Role: Standalone logger with flash wear-leveling, RTC-less time-stamping via internal timer, and serial upload via UART. Use Value: 16kB flash stores >200,000 timestamped samples; 10,000 erase cycles ensure 10+ years of field deployment; stop-mode current <100μA extends battery life. | Use Scenario: Digital control unit in line-interactive UPS monitoring AC input, battery charge state, and inverter output waveform. IC Role / Device Role / Timing Role: Safety-critical supervisor coordinating battery charging, transfer switching, and fault shutdown with millisecond response. Use Value: Brownout detection and programmable watchdog timer prevent runaway states; 5-level interrupt priority ensures fault interrupts preempt background tasks. |
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, same PLCC-44 package, and identical peripherals/timing | Required where larger firmware image size or future code expansion headroom is needed | Select DS89C450-QNL+ only if firmware exceeds 16kB; otherwise DS89C430-QNL+ reduces cost and flash wear |
| DS87C520-QCL+ | Legacy 12-cycle-per-instruction core, 24MHz max clock, 16kB flash, PLCC-44, no power-fail detection or EMI reduction mode | Suitable for cost-sensitive legacy upgrades where performance gain is not required | Choose DS87C520-QCL+ only for drop-in replacement in existing 8051 designs with unchanged timing constraints |
Compared with DS89C430-QNL+, DS89C450-QNL+ offers 4× more flash but identical speed and features, while DS87C520-QCL+ trades 12× lower performance for broader legacy toolchain compatibility and lower unit cost.
Availability
DS89C430-QNL+ is available at Aetrix Electronics and suitable for industrial control, HVAC, and data logging applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant manufacturing.
Supply support for DS89C430-QNL+ 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-QNL+ belongs to Maxim's Ultra-High-Speed Flash Microcontroller family, engineered to replace legacy 8051s in performance-constrained embedded systems while maintaining software compatibility and minimizing PCB redesign effort.
FAQ
What is the maximum operating frequency of the DS89C430-QNL+?
The DS89C430-QNL+ operates at a maximum system clock frequency of 33MHz. This enables 33 million instructions per second (MIPS) performance due to its one-clock-per-machine-cycle architecture. The device supports external crystal oscillators from 1MHz to 33MHz or external clock sources meeting tCHCX/tCLCX timing requirements (min 10ns high/low time). At 33MHz, instruction execution time is 30ns per cycle.
Does the DS89C430-QNL+ support in-system programming (ISP)?
Yes, the DS89C430-QNL+ supports in-system programming through its primary serial port (UART0) using ROM-resident or user-defined loader software. It requires no external high-voltage programming signals. Flash memory can be reprogrammed while the device is soldered on the target board, enabling field firmware updates. External parallel programming is also supported via the ALE/PROG pin for high-volume manufacturing.
How does the power-fail detection feature work on the DS89C430-QNL+?
The DS89C430-QNL+ integrates a dedicated power-fail comparator monitoring VCC. When VCC drops to VPFW = 4.375V (typical), it asserts an early-warning interrupt (PFI), giving firmware time to save critical data before reaching the reset threshold VRST = 4.125V (typical). This two-threshold design ensures deterministic shutdown sequencing and prevents data corruption during brownout events.
Is the DS89C430-QNL+ pin-compatible with standard 8051 microcontrollers?
Yes, the DS89C430-QNL+ is pin-compatible with standard 8051-family devices in the 44-pin PLCC package, including signal mapping for P0–P3, RST, XTAL1/XTAL2, EA, ALE, and PSEN. However, its enhanced peripherals (dual UARTs, extra interrupts, EMI reduction mode) require updated firmware initialization; timing-critical legacy code may need adjustment due to 12× faster instruction execution.
What package type and lead finish does the DS89C430-QNL+ use?
The DS89C430-QNL+ uses a 44-pin Plastic Leaded Chip Carrier (PLCC) package with J-lead configuration and lead-free (RoHS-compliant) matte tin finish. The body dimensions are 16.5mm × 16.5mm, and the lead pitch is 1.27mm. The '+' suffix explicitly denotes compliance with JEDEC J-STD-020 moisture sensitivity level 3 and RoHS Directive 2011/65/EU.
DS89C430-QNL+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 44-LCC (J-Lead)
- Series:
- 89C
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Verified
- Core Processor:
- 8051
- Core Size:
- 8-Bit
- Speed:
- 33MHz
- 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-QNL+ FAQ
1.How can I place an order for DS89C430-QNL+ through Aetrix?
Please submit a Request for Quotation (RFQ) for DS89C430-QNL+ 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-QNL+ reliable?
The price and inventory of DS89C430-QNL+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS89C430-QNL+ is usually 5 days.
3.What payment methods are accepted for DS89C430-QNL+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS89C430-QNL+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS89C430-QNL+?
DS89C430-QNL+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS89C430-QNL+ 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-QNL+?
For technical support, including DS89C430-QNL+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS89C430-QNL+ requirements.
6.How does Aetrix verify that DS89C430-QNL+ is sourced from the original manufacturer or authorized distributors?
All DS89C430-QNL+ 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-QNL+ meets industry standards.
7.What is the process for return or replacement of DS89C430-QNL+?
All DS89C430-QNL+ units undergo pre-shipment inspection (PSI). If there is an issue with DS89C430-QNL+, 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-QNL+ part is unused and in its original packaging.
Return procedure for DS89C430-QNL+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DS89C430-QNL+ Tags
-
ATTINY4-TSHR
Microchip Technology
-
ATTINY10-TSHR
Microchip Technology
-
ATTINY10-TS8R
Microchip Technology
-
ATTINY202-SSNR
Microchip Technology
-
ATTINY202-SSFR
Microchip Technology
-
ATTINY402-SSNR
Microchip Technology
-
PIC16F15213T-I/MF
Microchip Technology
-
PIC16F15213-E/MF
Microchip Technology
-
PIC10F200T-I/OT
Microchip Technology
-
ATTINY412-SSNR
Microchip Technology
-
PIC10F202T-I/OT
Microchip Technology
-
ATTINY404-SSNR
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
