My Inquiry
My Account
Analog Devices Inc./Maxim Integrated DS80C320-ENL
- Part No.:
- DS80C320-ENL
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Microcontrollers
- Package:
- 44-TQFP
- Datasheet:
-
DS80C320-ENL.pdf
- Description:
- IC MCU 8BIT ROMLESS 44TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,194
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
DS80C320-ENL from Maxim Integrated is a high-speed, 80C32-compatible 8-bit microcontroller featuring a 4-clock-per-machine-cycle core, 33MHz maximum crystal frequency, 256 bytes of on-chip RAM, three 16-bit timer/counters, and dual full-duplex hardware serial ports. It operates from 4.25V to 5.5V and targets industrial control, embedded instrumentation, and legacy 8051 system upgrades requiring deterministic real-time performance.
For engineers reviewing the DS80C320-ENL datasheet, DS80C320-ENL pinout, DS80C320-ENL application, or DS80C320-ENL equivalent, key selection considerations include its -40°C to +85°C extended temperature rating, 44-pin TQFP package, programmable MOVX memory access stretch (2–9 cycles), dual data pointer for accelerated block moves, and power-fail reset/interrupt support - all while maintaining 8051 instruction set and pin compatibility.
Technical Context
The DS80C320-ENL implements a redesigned 8051-compatible core eliminating wasted clock cycles: every instruction executes in 4, 8, or 12 oscillator cycles (vs. 12/24 in standard 80C32), delivering up to 3× faster execution at identical crystal frequencies. Its dual SFR-mapped serial ports (UART0 on P3.0/P3.1, UART1 on P1.2/P1.3) operate independently with separate baud rate generators and control registers (SCON0/SCON1, SBUF0/SBUF1).
Timing-critical peripherals retain backward compatibility via configurable clock dividers: timers default to 12-clock operation on reset (preserving legacy baud rates), but CKCON bits allow per-timer selection of 4-clock mode. Memory access is decoupled - program fetches run at fixed 4-cycle timing, while MOVX data transfers are software-stretchable (2–9 machine cycles) via CKCON.2–0 to interface seamlessly with slow peripherals or fast SRAM without glue logic.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 80C32-compatible 8-bit CPU with 4-clock-per-machine-cycle execution (vs. 12-clock baseline) |
| Max Clock Frequency | 33MHz crystal input - enables 82.5MHz apparent instruction throughput (2.5× speedup) |
| On-Chip RAM | 256 bytes scratchpad RAM - directly addressable as internal data space, no external bus overhead |
| Timer/Counters | Three 16-bit programmable timers - Timer 2 supports capture/reload; all support 4- or 12-clock modes via CKCON |
| Serial Interfaces | Two independent full-duplex UARTs - UART0 (P3.0/P3.1) and UART1 (P1.2/P1.3) with separate SFRs and baud rate sources |
| Memory Addressing | 64kB program space (ROM/Flash) + 64kB external data space (RAM/peripherals) - uses P0 (AD0–AD7) and P2 (A8–A15) |
| Operating Voltage | 4.25V to 5.5V - ensures compatibility with legacy 5V TTL/CMOS logic and power rails |
| Temperature Range | -40°C to +85°C - qualified for industrial and extended-environment embedded deployments |
Pinout & Package
DS80C320-ENL is housed in a 44-pin Thin Quad Flat Package (TQFP) with 0.8mm lead pitch, thermally enhanced for industrial ambient operation. Pin functions align with standard 80C32 layouts while adding dedicated signals for enhanced peripherals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC (Pin 16, 17) | Power Supply | +5V main supply - dual pins reduce IR drop and improve noise immunity in high-speed operation |
| GND (Pin 4) | Digital Ground | Reference return for all digital I/O and core logic - isolated from analog ground in mixed-signal designs |
| RST (Pin 14) | Reset Input | Schmitt-triggered active-high input with internal pulldown - accepts RC or pushbutton reset; no external capacitor required |
| XTAL1 (Pin 15), XTAL2 (Pin 14) | Crystal Oscillator Interface | Supports parallel-resonant AT-cut crystals up to 33MHz; XTAL1 accepts external clock source if crystal omitted |
| P0.0–P0.7 (Pins 33–38, 26, 27) | Multiplexed Address/Data Bus | AD0–AD7 - latched by ALE; provides LSB address during ALE high, bidirectional data during ALE low |
| P1.0–P1.7 (Pins 40–44, 1–3) | General-Purpose I/O + Alternate Functions | Includes UART1 (P1.2/RXD1, P1.3/TXD1), Timer2 I/O (P1.0/T2, P1.1/T2EX), and five external interrupts (INT2–INT5) |
| P2.0–P2.7 (Pins 18–25) | Upper Address Bus | A8–A15 - supplies MSB for external memory/peripheral addressing; value reflects internal latch during MOVX |
| P3.0–P3.7 (Pins 5, 7–13) | Multifunction I/O Port | UART0 (P3.0/RXD0, P3.1/TXD0), INT0/INT1 (P3.2/P3.3), Timer inputs (P3.4/T0, P3.5/T1), WR/ RD strobes (P3.6/P3.7) |
| EA (Pin 29) | External Access Enable | Must be tied LOW - forces all code fetches from external ROM/Flash; no internal program memory |
Key Features
| Feature | Design Value |
|---|---|
| Dual Data Pointer (DPTR0/DPTR1) | Reduces 64-byte RAM-to-RAM block move cycles from 1869 to 1097 at 25MHz - eliminates address save/restore overhead |
| Programmable MOVX Stretch (CKCON.2–0) | Configures external data memory access from 2 to 9 machine cycles - enables direct interfacing with 120ns SRAM or 10ms LCD controllers |
| Power-Fail Detection & Reset | Generates early-warning interrupt before brownout and hard reset - allows safe EEPROM save or state preservation |
| Programmable Watchdog Timer | Independent timeout circuit with software-selectable period - prevents runaway code in unattended industrial systems |
| Seven External Interrupt Sources | Extends standard 8051's two interrupts to seven (INT0–INT5 + power-fail), all edge-selectable for precise event capture |
| Timer Clock Mode Select (CKCON.3–5) | Per-timer selection of 4- or 12-clock timing - preserves legacy baud rates while enabling high-speed PWM or capture |
Applications
| Industrial PLC I/O Module | Legacy Medical Device Upgrade |
|---|---|
|
Use Scenario: Real-time monitoring of 16-channel analog sensor inputs with RS-485 telemetry and local LCD display. IC Role / Device Role / Timing Role: DS80C320-ENL serves as the central controller managing ADC sequencing, UART0 for Modbus RTU communication, UART1 for local debug console, and Timer2 for precise 100ms sampling intervals. Use Value: 33MHz operation enables sub-10μs GPIO toggling for SPI-driven ADCs; dual UARTs eliminate multiplexer complexity; -40°C to +85°C rating ensures reliability in factory-floor enclosures. |
Use Scenario: Retrofitting an aging ECG monitor with enhanced data logging, Bluetooth LE bridging, and battery-backed configuration storage. IC Role / Device Role / Timing Role: DS80C320-ENL replaces obsolete 80C32, executing legacy firmware unchanged while adding UART1 for BLE module control and power-fail interrupt for graceful shutdown during battery depletion. Use Value: Pin and instruction compatibility avoids PCB redesign; programmable watchdog prevents lockup during wireless firmware updates; dual DPTR accelerates waveform buffer compression. |
| Smart Energy Meter Interface | Automated Test Equipment (ATE) Controller |
|
Use Scenario: Isolated communication gateway between metrology IC (SPI), HPLC power-line modem (UART), and secure MCU (I²C). IC Role / Device Role / Timing Role: DS80C320-ENL acts as protocol translator and scheduler - UART0 handles HPLC framing, UART1 manages SPI-to-UART conversion, and Timer1 generates precise 1ms timebase for metering pulses. Use Value: MOVX stretch allows direct connection to slow HPLC transceivers without wait-state logic; power-fail interrupt triggers secure flash commit before AC loss; 44-TQFP fits constrained meter PCB area. |
Use Scenario: Embedded sequencer controlling relay matrices, DMM backplanes, and calibration DACs in benchtop test systems. IC Role / Device Role / Timing Role: DS80C320-ENL executes deterministic test scripts, using Timer0 for μs-accurate stimulus timing, UART0 for GPIB-to-serial translation, and P1.x pins for relay driver enable signals. Use Value: 2.5× speedup reduces test cycle time without firmware rewrite; dual UARTs support simultaneous host command parsing and instrument feedback; extended temp range ensures stability during prolonged burn-in tests. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DS80C320-MNL | Same core, 40-pin PDIP package, identical -40°C to +85°C rating and 33MHz speed | Larger footprint, through-hole mounting - suited for prototyping or low-volume industrial assemblies where reflow is impractical | Select DS80C320-MNL when manual soldering, socket-based testing, or legacy board compatibility is required over space-constrained TQFP layout. |
| DS80C323-END | Same feature set but 2.7V–5.5V operation, 18MHz max clock, and identical 44-pin TQFP package | Lower power consumption and wider voltage range - ideal for battery-powered or mixed-voltage systems where 33MHz speed is unnecessary | Choose DS80C323-END for portable medical sensors or IoT edge nodes needing extended battery life and single-supply flexibility at reduced performance. |
Compared with DS80C320-MNL, DS80C320-ENL offers superior board-area efficiency and thermal performance in surface-mount production; compared with DS80C323-END, it delivers 83% higher throughput for time-critical control loops while maintaining identical pinout and firmware compatibility - making DS80C320-ENL optimal for industrial upgrades demanding speed and ruggedness.
Availability
DS80C320-ENL is available at Aetrix Electronics and suitable for industrial automation, medical device retrofitting, smart metering, and test equipment requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for DS80C320-ENL 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) is a semiconductor company specializing in precision analog, mixed-signal, and high-reliability microcontrollers for industrial, medical, and communications applications.
The DS80C320-ENL belongs to Maxim's high-speed 8051-compatible microcontroller family, designed specifically to extend the life of legacy 8051-based systems with measurable performance gains, enhanced peripherals, and industrial-grade robustness - without requiring software or hardware redesign.
FAQ
What is the maximum crystal frequency supported by the DS80C320-ENL?
The DS80C320-ENL supports a maximum crystal frequency of 33MHz, enabling a 4-clock-per-cycle architecture that delivers up to 82.5MHz apparent instruction throughput. This specification is validated across the full -40°C to +85°C operating range and is explicitly listed in the Ordering Information table for the DS80C320-ENL variant. The device maintains timing compliance and signal integrity at this frequency under nominal VCC conditions.
Does the DS80C320-ENL include on-chip program memory (ROM/Flash)?
No, the DS80C320-ENL does not contain on-chip program memory. It is a ROMless microcontroller requiring external program memory accessed via the P0 and P2 address/data bus. The EA pin must be tied LOW to enable external code fetches. This architecture matches the original 80C32 and allows flexible selection of EPROM, Flash, or masked ROM based on application requirements and update needs.
How does the dual data pointer (DPTR0/DPTR1) improve performance in the DS80C320-ENL?
The DS80C320-ENL's dual data pointer accelerates block memory operations by eliminating software overhead for address management. With DPTR0 and DPTR1 mapped to SFRs 82h–85h and selected via DPS bit (SFR 86h), a 64-byte RAM-to-RAM move requires only 1097 machine cycles versus 1869 on a standard 8051 - a 41% reduction. This is achieved by toggling DPS instead of saving/restoring addresses in registers, directly benefiting firmware handling large buffers or display framestores.
Can the DS80C320-ENL operate with a 3.3V supply?
No, the DS80C320-ENL requires a 4.25V to 5.5V supply and is not rated for 3.3V operation. For 3.3V-compatible alternatives with similar features, consider the DS80C323-END, which supports 2.7V to 5.5V operation but has a lower 18MHz maximum clock speed. The DS80C320-ENL's voltage range is optimized for compatibility with legacy 5V TTL/CMOS logic families and industrial power rails.
What peripheral functions are enabled by Port 1 pins on the DS80C320-ENL?
Port 1 on the DS80C320-ENL provides eight bidirectional I/O lines with alternate functions including UART1 (P1.2/RXD1, P1.3/TXD1), Timer2 I/O (P1.0/T2, P1.1/T2EX), and five edge-selectable external interrupts (P1.4/INT2, P1.5/INT3, P1.6/INT4, P1.7/INT5). These functions are accessed via dedicated SFRs and do not conflict with standard port operations, allowing simultaneous use of GPIO and enhanced peripherals in real-time applications.
DS80C320-ENL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 44-TQFP
- Series:
- 80C
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not 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:
- -
- Program Memory Type:
- ROMless
- EEPROM Size:
- -
- RAM Size:
- 256 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:
DS80C320-ENL FAQ
1.How can I place an order for DS80C320-ENL through Aetrix?
Please submit a Request for Quotation (RFQ) for DS80C320-ENL 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 DS80C320-ENL reliable?
The price and inventory of DS80C320-ENL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS80C320-ENL is usually 5 days.
3.What payment methods are accepted for DS80C320-ENL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS80C320-ENL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS80C320-ENL?
DS80C320-ENL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS80C320-ENL 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 DS80C320-ENL?
For technical support, including DS80C320-ENL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS80C320-ENL requirements.
6.How does Aetrix verify that DS80C320-ENL is sourced from the original manufacturer or authorized distributors?
All DS80C320-ENL 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 DS80C320-ENL meets industry standards.
7.What is the process for return or replacement of DS80C320-ENL?
All DS80C320-ENL units undergo pre-shipment inspection (PSI). If there is an issue with DS80C320-ENL, 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 DS80C320-ENL part is unused and in its original packaging.
Return procedure for DS80C320-ENL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DS80C320-ENL 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…
