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Analog Devices Inc./Maxim Integrated DS5003M-DNS+
- Part No.:
- DS5003M-DNS+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Microcontrollers
- Package:
- Die
- Datasheet:
-
DS5003M-DNS+.pdf
- Description:
- IC MCU 8BIT EXTERNAL NVSRAM DICE
- Quantity:
- Payment:
- Shipping:
Inventory:4,227
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Product details
Overview
DS5003M-DNS+ from Maxim Integrated is an 8051-compatible secure microprocessor with lithium-backed nonvolatile SRAM, 256 bytes of on-chip RAM (128 direct + 128 indirect), 64-bit on-chip encryption key, self-destruct input (SDI), and crash-proof operation preserving data for >10 years without power - deployed in gaming machines and software-protection-critical embedded systems.
For engineers reviewing the DS5003M-DNS+ datasheet, DS5003M-DNS+ pinout, DS5003M-DNS+ application, or DS5003M-DNS+ equivalent, this page delivers verified electrical specs (VCC = 4.00–5.5 V, ICC = 36 mA @ 16 MHz), security architecture details (encrypted bus, true random-key generation), memory mapping (up to 128 kB external SRAM), and tamper-response behavior (SDI pulse acceptance ≥50 µs at VCC = 0 V).
Technical Context
The DS5003M-DNS+ implements real-time hardware encryption/decryption of all byte-wide address and data bus transactions using a protected 64-bit key generated by an on-chip true random-number generator. Its memory map supports up to 128 kB of external SRAM partitioned across CE1–CE4 and PE1–PE4 enables, with lithium-backed retention for VCCO, CE1, CE2, CE3, CE4, PE1, and PE2.
It operates in three power modes - active (16 MHz max), idle (7.0 mA @ 12 MHz), and stop (80 µA) - with early-warning power-fail interrupt (VPFW = 4.25–4.50 V), power-fail reset, and watchdog timer. The SDI pin triggers immediate erasure of vector SRAM and encryption keys regardless of VCC presence, and VRST provides guaranteed reset-state indication even at VCC = 0 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Oscillator Frequency | 1.0–16.0 MHz - supports high-speed execution while maintaining deterministic timing for encrypted bus cycles. |
| Operating Voltage (VCC) | 4.00–5.5 V - wide supply range ensures compatibility with legacy 5 V industrial and gaming platforms. |
| Power-Fail Warning (VPFW) | 4.25–4.50 V - triggers early interrupt before brownout, enabling safe state save to lithium-backed SRAM. |
| Stop-Mode Current | 80 µA - ultra-low quiescent draw preserves lithium cell life during extended backup operation. |
| Lithium-Backed Quiescent Current (ILI) | 5–75 nA - enables >10-year data retention at room temperature with minimal battery drain. |
| SDI Pulse Accept Time | ≥50 µs at VCC = 0 V - guarantees tamper response even during complete power loss. |
| On-Chip RAM | 256 bytes (128 direct + 128 indirect) - supports stack operations and 8051 register-indirect addressing (R0/R1) for secure runtime variables. |
Pinout & Package
DS5003M-DNS+ is housed in an 80-pin MQFP (Metric Quad Flat Package) with 0.65 mm pitch, lead(Pb)-free and RoHS-compliant per the "+" suffix. Pin functions are validated per Maxim's official DS5003 datasheet Rev 0 (March 2008), including lithium-backed outputs (VCCO, CE1–CE4, PE1–PE2) and tamper-critical inputs (SDI, VRST).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Primary Power Supply | +5 V main supply; powers core logic and I/O; monitored for VPFW and reset thresholds. |
| VCCO | Switched Output Supply | Auto-switches between VCC and VLI to power external SRAM; remains active during lithium backup. |
| VLI | Lithium Cell Input | Accepts 2.5–4.0 V lithium source; enables nonvolatile retention and tamper-resilient operation. |
| SDI | Self-Destruct Input | Active-high trigger causing irreversible erasure of encryption key and vector SRAM - functional at VCC = 0 V. |
| VRST | Reset State Indicator | Open-drain output signaling low-VCC reset condition; also accepts external low assertion to synchronize multi-device shutdown. |
| BA0–BA14 / BD0–BD7 | Byte-Wide Address/Data Bus | Nonmultiplexed 15-bit address + 8-bit bidirectional data path for encrypted access to up to 128 kB SRAM. |
| CE1–CE4 / PE1–PE4 | Chip/Peripheral Enables | Lithium-backed (CE1–CE4, PE1–PE2) or non-backed (PE3–PE4) enables for memory/peripheral partitioning and tamper-safe isolation. |
Key Features
| Feature | Design Value |
|---|---|
| Real-Time Hardware Encryption | Encrypts/decrypts all external SRAM reads/writes on-the-fly using address- and key-dependent algorithm - no CPU overhead or timing penalty. |
| True Random-Key Generation | On-chip entropy source generates unique 64-bit key prior to firmware load - user never accesses or controls the key value. |
| Crash-Proof Nonvolatile Retention | Maintains full SRAM contents, encryption key, and security lock state for >10 years at 25°C with no external power. |
| Self-Destruct Tamper Response | SDI activation erases vector SRAM and encryption key within microseconds - effective even when VCC = 0 V. |
| Top-Coating Protection | Die-level physical barrier prevents microprobing attacks - blocks extraction of memory layout or key storage location. |
Applications
| Gaming Machine Security Module | Software License Enforcement System |
|---|---|
Use Scenario: Embedded in slot machine mainboards to store and execute licensed game code while resisting physical tampering and memory dumping. IC Role / Device Role / Timing Role: Secure execution engine with encrypted bus interface, lithium-backed SRAM, and SDI-linked tamper detection circuitry. Use Value: Prevents unauthorized code modification or cloning by ensuring only authenticated, encrypted firmware executes - enforced via on-chip key and self-destruct. |
Use Scenario: Deployed in medical device controllers to enforce software license terms and prevent feature unlocking via memory patching. IC Role / Device Role / Timing Role: Trusted runtime environment that validates license tokens, encrypts configuration data, and triggers irreversible wipe on violation. Use Value: Guarantees license compliance through hardware-enforced encryption and irreversible key erasure - eliminates software-only bypass vectors. |
| Secure Firmware Update Node | Industrial Control Logic Vault |
Use Scenario: Used in programmable logic controllers (PLCs) to authenticate and decrypt field-updated firmware images before loading into SRAM. IC Role / Device Role / Timing Role: Secure bootloader co-processor managing PROG-triggered bootstrap mode, memory map configuration, and encrypted L-command writes. Use Value: Enables over-the-air updates without exposing plaintext firmware - decryption occurs transparently during execution, not at load time. |
Use Scenario: Installed in energy metering systems to protect calibration constants and tariff tables from unauthorized alteration or readout. IC Role / Device Role / Timing Role: Nonvolatile configuration vault with VRST-monitored power-fail handling and lithium-backed retention of critical parameters. Use Value: Ensures metrological integrity by retaining calibrated values for >10 years without battery replacement - backed by crash-proof design. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar secure microprocessor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DS5002FP+ | 128 bytes total RAM (no indirect scratchpad); lacks DS5003's additional 128-byte indirect RAM accessible via R0/R1 addressing. | No support for stack expansion or large local variable sets in secure runtime context. | Select DS5002FP+ only if application requires minimal on-chip RAM and avoids 8051 indirect addressing beyond 0x00–0x7F. |
| MAXQ1062 | ARM-based secure MCU with SHA-256, ECC, and secure boot; no lithium-backed SRAM or self-destruct pin; uses flash instead of external SRAM. | Targets modern IoT authentication, not legacy SRAM-based secure execution with >10-year retention. | Choose MAXQ1062 for cloud-connected devices needing cryptographic acceleration - not for crash-proof, long-term SRAM vaults. |
Compared with DS5002FP+, DS5003M-DNS+ adds critical runtime flexibility via 128-byte indirect RAM; compared with MAXQ1062, it delivers unmatched lithium-backed longevity and physical tamper response - making it irreplaceable for legacy gaming and metering vaults requiring decade-scale data integrity.
Availability
DS5003M-DNS+ is available at Aetrix Electronics and suitable for gaming machines, software license enforcement systems, and industrial control logic vaults requiring stable component supply, long-lifecycle support, and certified tamper resistance.
Supply support for DS5003M-DNS+ 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 analog, mixed-signal, and secure ICs for industrial, communications, and computing applications.
The DS5003M-DNS+ belongs to Maxim's secure microprocessor product line, designed specifically for applications demanding hardware-enforced software protection, long-term nonvolatile memory retention, and physical tamper resilience - especially in unattended, revenue-critical equipment.
FAQ
What is the function of the SDI pin on the DS5003M-DNS+?
The SDI (Self-Destruct Input) pin on the DS5003M-DNS+ is an active-high tamper-detection interface. When asserted for ≥50 µs - even with VCC = 0 V - it triggers irreversible erasure of the 64-bit encryption key and 48-byte vector SRAM. This ensures no recovery of protected firmware or secrets after physical intrusion, making DS5003M-DNS+ suitable for high-risk environments like gaming terminals.
How does the DS5003M-DNS+ maintain data for over 10 years without power?
The DS5003M-DNS+ achieves >10-year data retention using integrated lithium backup (VLI input) that powers critical circuits - including SRAM, encryption key storage, and security lock state - when main VCC drops below threshold. Its ultra-low lithium-backed quiescent current (5–75 nA) minimizes battery depletion, and the chip's internal architecture preserves volatile state without refresh, enabling true nonvolatile operation at room temperature.
Can the DS5003M-DNS+ execute code directly from external SRAM?
Yes - the DS5003M-DNS+ executes encrypted code directly from external SRAM via its byte-wide bus (BA0–BA14, BD0–BD7). All opcodes and data are decrypted in real time by on-chip hardware before CPU execution, with no software intervention or performance penalty. This transparent encryption/decryption allows standard 8051 toolchains to target DS5003M-DNS+ while guaranteeing runtime confidentiality.
What is the difference between CE1 and CE1N on the DS5003M-DNS+?
CE1 is a lithium-backed, active-low chip-enable output used to select external SRAM during both main power and battery backup; it remains logic-high (inactive) when VCC falls below VLI. CE1N is its nonbattery-backed counterpart - not recommended for use because DS5003M-DNS+'s encryption prevents EPROM compatibility, and CE1N offers no tamper-resilient functionality. Designers should exclusively use CE1 for secure memory enable.
Does the DS5003M-DNS+ support in-system programming?
Yes - the DS5003M-DNS+ supports in-system programming via its on-chip serial port (P3.0/RXD and P3.1/TXD) in bootstrap loader mode, activated by a falling edge on the PROG pin. During bootload, the L command loads application firmware in encrypted form into external SRAM, with automatic key generation and security lock setting - all performed without removing the DS5003M-DNS+ from the target board.
DS5003M-DNS+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- Die
- Series:
- DS500x
- Packaging:
- Tube
- 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):
- 4V ~ 5.5V
- Data Converters:
- -
- Oscillator Type:
- External
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
DS5003M-DNS+ FAQ
1.How can I place an order for DS5003M-DNS+ through Aetrix?
Please submit a Request for Quotation (RFQ) for DS5003M-DNS+ 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 DS5003M-DNS+ reliable?
The price and inventory of DS5003M-DNS+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS5003M-DNS+ is usually 5 days.
3.What payment methods are accepted for DS5003M-DNS+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS5003M-DNS+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS5003M-DNS+?
DS5003M-DNS+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS5003M-DNS+ 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 DS5003M-DNS+?
For technical support, including DS5003M-DNS+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS5003M-DNS+ requirements.
6.How does Aetrix verify that DS5003M-DNS+ is sourced from the original manufacturer or authorized distributors?
All DS5003M-DNS+ 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 DS5003M-DNS+ meets industry standards.
7.What is the process for return or replacement of DS5003M-DNS+?
All DS5003M-DNS+ units undergo pre-shipment inspection (PSI). If there is an issue with DS5003M-DNS+, 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 DS5003M-DNS+ part is unused and in its original packaging.
Return procedure for DS5003M-DNS+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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