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Analog Devices Inc./Maxim Integrated DS5001FP-16N
- Part No.:
- DS5001FP-16N
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Microcontrollers
- Package:
- 80-BQFP
- Datasheet:
-
DS5001FP-16N.pdf
- Description:
- IC MCU 8BIT EXTRNL NVSRAM 80QFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,737
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Product details
Overview
DS5001FP-16N from Maxim Integrated is an 8051-compatible nonvolatile SRAM-based microprocessor with 128kB NV RAM, 16MHz max clock, -40°C to +85°C industrial temperature range, and 80-pin MQFP package. It performs in-system reprogramming, CRC-16 memory integrity checking, and power-fail reset/interrupt functions - deployed in data loggers, secure metering, and battery-backed control systems requiring persistent state retention.
For engineers reviewing the DS5001FP-16N datasheet, DS5001FP-16N pinout, DS5001FP-16N application, or DS5001FP-16N equivalent, key selection criteria include lithium-backed memory retention (>10 years), byte-wide nonmultiplexed address/data bus (BA14–0 / BD7–0), R/W-controlled write protection, and integrated watchdog timer with early-warning power-fail interrupt at VPFW = 4.1–4.6V.
Technical Context
The DS5001FP-16N implements an 8051 instruction-set-compatible core with dual 16-bit timers, on-chip UART, and 32 I/O port pins. Its architecture separates memory access via a dedicated byte-wide bus (BA14–0 + BD7–0), eliminating multiplexing overhead and freeing all port pins for application use.
Power management integrates a precision bandgap reference to monitor VCC against VPFW (power-fail warning), VCCMIN (reset threshold), and VLI (lithium switchover). All chip enables (CE1–CE4, PE1–PE2) and VRST/PF signals remain active during lithium backup, ensuring deterministic behavior during brownout and zero-voltage conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 8051-compatible instruction set with full object-code compatibility for existing assemblers and compilers. |
| Nonvolatile Memory | 128kB NV SRAM with CRC-16 integrity verification and automatic write-protection of ROM/program segments. |
| Max Clock Speed | 16MHz - supports real-time operation in industrial control loops and high-speed serial communication. |
| Operating Temperature | -40°C to +85°C - qualified for extended deployment in outdoor metering, transportation, and factory automation. |
| Power Management | Three-tier voltage monitoring: VPFW (4.1–4.6V), VCCMIN (3.85–4.25V), VLI (2.5–4.0V); enables graceful shutdown and lithium switchover without external supervision. |
| Package | 80-pin MQFP (24.0 × 18.0 mm body, 0.8 mm pitch) - compatible with standard surface-mount assembly and thermal profiling. |
| Memory Interface | Byte-wide nonmultiplexed bus: BA14–0 (15-bit address), BD7–0 (8-bit bidirectional data), R/W strobe - eliminates glue logic and simplifies SRAM interfacing. |
Pinout & Package
DS5001FP-16N uses an 80-pin MQFP package with exposed thermal pad (not electrically connected). Pin functions are validated per Maxim DS5001FP datasheet Rev 070605, including lithium-backed outputs (CE1–CE4, PE1–PE2, VRST, PF) and dual-mode MSEL-controlled memory configuration (32k vs. 128k SRAM).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P0.0–P0.7 | Port 0 I/O / Address-Data Multiplexed Bus | Open-drain general-purpose I/O; serves as expanded address/data bus when ALE active - requires external pullups unless used in expanded mode. |
| P1.0–P1.7 | Port 1 General-Purpose I/O | CMOS push-pull I/O with no internal pullups; fully software-controllable for peripheral interfacing or GPIO expansion. |
| P2.0–P2.7 | Port 2 I/O / High-Order Address Bus | Provides A8–A15 during expanded memory accesses; also usable as general I/O when not addressing external memory. |
| P3.0/RXD, P3.1/TXD | UART Serial Interface | Full-duplex asynchronous serial port - isolated from PC COM ports by design; requires level-shifting for RS-232 interfacing. |
| RST | Active-High Reset Input | Internally pulled down; asserts hardware reset on logic-high assertion - no external RC circuit required. |
| VRST | Power-Fail Reset Indicator | Open-drain output driven low when VCC < VCCMIN - guaranteed active even at VCC = 0V due to lithium backup. |
| PF | Lithium Backup Status Flag | Active-low output signaling VCC < VLI - used to isolate non-battery-backed peripherals during backup mode. |
| BA0–BA14 | Byte-Wide Address Bus | 15-bit nonmultiplexed address lines driving SRAM address inputs directly - eliminates latch requirements and timing complexity. |
| BD0–BD7 | Byte-Wide Data Bus | Bidirectional 8-bit data path for NV SRAM access - synchronized with CEx and R/W to enable zero-wait-state operation. |
| R/W | Read/Write Strobe | Active-low signal controlling SRAM write enable - automatically deasserted for program-memory regions to enforce write protection. |
| CE1–CE4 | Lithium-Backed Chip Enables | Four decoded enables for up to 128kB SRAM partitioning; remain logic-high during VCC loss to prevent spurious writes. |
| PE1–PE4 | Peripheral Enable Signals | Four memory-mapped peripheral selects (0000h–FFFFh); PE1–PE2 are lithium-backed for RTC or battery-backed peripherals. |
| MSEL | Memory Size Select | Hardwired input determining SRAM configuration: logic-high = four 32kB banks; logic-low = single 128kB bank with A15/A16 remapped from CE2/CE3. |
| VLI | Lithium Voltage Input | Accepts 2.5–4.0V lithium cell (nominal 3.0V); powers VCCO and lithium-backed logic when VCC drops below VLI. |
| VCCO | Battery-Backed Power Output | Switched output delivering VLI − 0.45V (min) to SRAM VCC pins - ensures data retention with low-quiescent-current SRAMs. |
Key Features
| Feature | Design Value |
|---|---|
| In-system programmability | On-chip serial bootstrap loader enables field firmware updates without removing the device - critical for remote or sealed-system deployments. |
| Nonvolatile memory retention | Guarantees >10 years of data retention at room temperature using external lithium cell - eliminates EEPROM wear-out and flash endurance limits. |
| Power-fail resilience | Triple-threshold monitoring (VPFW/VCCMIN/VLI) with early-warning interrupt and deterministic reset - prevents corruption during brownout events. |
| Dedicated memory bus | Separate BA14–0 and BD7–0 buses eliminate address/data multiplexing - reduces PCB layer count and removes latch timing constraints. |
| Hardware write protection | Automatic ROM-segment locking via memory map partitioning - prevents accidental overwrites of boot code or calibration data. |
| Watchdog timer | Independent timeout circuit resets CPU on software hang - configurable via SFRs and immune to VCC fluctuations during lithium backup. |
Applications
| Smart Utility Metering | Industrial Data Logger |
|---|---|
Use Scenario: Long-term energy consumption recording in electricity/water/gas meters with tamper-resistant storage and regulatory compliance reporting. IC Role / Device Role / Timing Role: Primary controller storing firmware, calibration tables, and time-stamped usage logs in battery-backed NV SRAM. Use Value: Eliminates need for external EEPROM or flash; retains 128kB of history across power cycles and grid outages without data loss. |
Use Scenario: Environmental sensor networks capturing temperature, pressure, and vibration data in manufacturing plants or remote infrastructure. IC Role / Device Role / Timing Role: Standalone logging node with real-time clock synchronization, CRC-verified storage, and scheduled upload triggers. Use Value: On-chip CRC-16 validation ensures log integrity; lithium-backed memory preserves records during extended maintenance blackouts. |
| Secure Access Control System | Medical Device Configuration Storage |
Use Scenario: Door controllers storing biometric templates, access logs, and audit trails in physically secured enclosures with anti-tampering features. IC Role / Device Role / Timing Role: Trusted execution environment for credential validation and encrypted log generation using internal NV RAM. Use Value: Write-protection of program space prevents malicious firmware injection; power-fail reset ensures consistent state after unexpected power loss. |
Use Scenario: Portable diagnostic equipment requiring FDA-compliant parameter persistence, calibration history, and patient session data retention. IC Role / Device Role / Timing Role: Nonvolatile configuration manager interfacing with ADCs, displays, and USB host controllers. Use Value: Guaranteed 10-year data retention meets medical device lifecycle requirements; VCCO output powers SRAM independently of main supply. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DS5001FP-16 | Same silicon, but rated for 0°C to +70°C only; lacks industrial temperature qualification and tighter VPFW/VCCMIN tolerances. | Suitable for commercial indoor applications only; not certified for automotive or outdoor industrial environments. | Select DS5001FP-16N when operating ambient exceeds 70°C or requires guaranteed performance across full industrial range. |
| DS5002FP-16N | Pin- and function-compatible variant with enhanced firmware security: encrypted boot loader, secure memory partitioning, and tamper detection. | Required where regulatory standards mandate cryptographic firmware integrity (e.g., payment terminals, government ID systems). | Choose DS5002FP-16N if application demands hardware-enforced code authentication beyond basic NV RAM persistence. |
Compared with DS5001FP-16 and DS5002FP-16N, the DS5001FP-16N uniquely balances industrial temperature robustness, lithium-backed memory retention, and cost-effective 8051 compatibility - making it optimal for data-critical embedded systems where security is secondary to reliability and longevity.
Availability
DS5001FP-16N is available at Aetrix Electronics and suitable for smart metering, industrial data logging, secure access control, and medical device configuration storage requiring stable component supply across extended product lifecycles.
Supply support for DS5001FP-16N 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 high-reliability analog and mixed-signal ICs for harsh-environment applications, emphasizing precision, power efficiency, and long-term stability.
The DS5001FP product line delivers nonvolatile microcontrollers optimized for battery-backed data retention, power-fail resilience, and seamless 8051 software migration - targeting utility, industrial, and medical systems needing guaranteed memory persistence.
FAQ
What is the maximum supported SRAM size for DS5001FP-16N?
The DS5001FP-16N supports up to 252kB of accessible data memory through bank switching: primary 64kB, second 64kB via peripheral selector, third 64kB via expanded bus, and up to 60kB converted from program space. This is achieved using CE1–CE4, PE1–PE4, and MSEL-controlled remapping - all documented in the Secure Microcontroller User's Guide. The DS5001FP-16N itself does not limit SRAM size; external logic determines final capacity.
Does DS5001FP-16N require an external crystal oscillator?
Yes, the DS5001FP-16N requires an external crystal connected between XTAL1 and XTAL2 pins to operate its internal oscillator. It supports crystals up to 16MHz and specifies startup time in the datasheet (tCSU). External clock drive is also supported, with defined high/low time, rise/fall time, and slew rate requirements - all verified in AC Characteristics section of the DS5001FP-16N datasheet.
How does DS5001FP-16N handle power failure during write operations?
The DS5001FP-16N prevents corruption during power failure using three coordinated mechanisms: early-warning interrupt (VPFW), hard reset (VCCMIN), and lithium switchover (VLI). When VCC drops below VPFW, software can flush buffers; at VCCMIN, all chip enables go high and R/W deasserts to freeze memory access; below VLI, lithium power sustains NV SRAM and critical logic. This sequence is hardware-enforced and requires no firmware intervention.
Can DS5001FP-16N be programmed in-circuit without removing it from the board?
Yes, the DS5001FP-16N supports full in-system programming via its on-chip serial bootstrap loader. Programming is initiated by pulling PROG low (debounced), which activates the loader to receive firmware over P3.0/RXD and P3.1/TXD. The loader validates checksums and CRC-16 before committing to NV SRAM - enabling field upgrades, adaptive firmware, and remote calibration without physical access to the device.
What is the role of the MSEL pin on DS5001FP-16N?
The MSEL pin on DS5001FP-16N configures memory mapping mode: logic-high selects four independent 32kB SRAM banks (using CE1–CE4), while logic-low configures a single 128kB SRAM with CE2/CE3 repurposed as A16/A15 address lines. This pin must be hardwired and cannot be changed dynamically - it determines how the DS5001FP-16N decodes external memory and must match the attached SRAM's organization.
DS5001FP-16N Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 80-BQFP
- Series:
- DS500x
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- 8051
- Core Size:
- 8-Bit
- Speed:
- 16MHz
- Connectivity:
- EBI/EMI, SIO, UART/USART
- Peripherals:
- Power-Fail Reset, WDT
- Number of I/O:
- 32
- Program Memory Size:
- External
- Program Memory Type:
- NVSRAM
- EEPROM Size:
- -
- RAM Size:
- -
- 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:
DS5001FP-16N FAQ
1.How can I place an order for DS5001FP-16N through Aetrix?
Please submit a Request for Quotation (RFQ) for DS5001FP-16N 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 DS5001FP-16N reliable?
The price and inventory of DS5001FP-16N are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS5001FP-16N is usually 5 days.
3.What payment methods are accepted for DS5001FP-16N?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS5001FP-16N transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS5001FP-16N?
DS5001FP-16N orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS5001FP-16N 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 DS5001FP-16N?
For technical support, including DS5001FP-16N datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS5001FP-16N requirements.
6.How does Aetrix verify that DS5001FP-16N is sourced from the original manufacturer or authorized distributors?
All DS5001FP-16N 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 DS5001FP-16N meets industry standards.
7.What is the process for return or replacement of DS5001FP-16N?
All DS5001FP-16N units undergo pre-shipment inspection (PSI). If there is an issue with DS5001FP-16N, 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 DS5001FP-16N part is unused and in its original packaging.
Return procedure for DS5001FP-16N:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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