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Analog Devices Inc./Maxim Integrated DS5250F-125+
- Part No.:
- DS5250F-125+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Microcontrollers
- Package:
- 100-BQFP
- Datasheet:
-
DS5250F-125+.pdf
- Description:
- IC MCU 8BIT ROMLESS 100MQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,928
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Product details
Overview
DS5250F-125+ from Maxim Integrated is a secure, 8051-compatible microcontroller with four clocks-per-machine-cycle architecture, 25MHz max operating frequency, hardware single/3DES encryption engine, and tamper-resistant features including thermal/voltage/probe detection. It executes encrypted programs in-place and integrates a 4096-bit modulo-arithmetic accelerator for public/private key operations, targeting PIN pads and financial terminals.
For engineers reviewing the DS5250F-125+ datasheet, DS5250F-125+ pinout, DS5250F-125+ application, or DS5250F-125+ equivalent, key selection considerations include 100-pin MQFP package compatibility, -40°C to +85°C industrial temperature grade (via DS5250F-1N5+), real-time clock with alarm interrupt, and secure-loader mode for trusted firmware updates.
Technical Context
The DS5250F-125+ implements a hardened 8051 core with dual data pointers, 1KB instruction cache, and programmable MOVX speed control. Its memory subsystem supports up to 4MB nonvolatile program and data memory, partitionable into segments from 4KB to 256KB, each independently encryptable via hardware DES/3DES engines.
Security architecture includes a true random-number generator, unique per-device ID, program memory integrity checking, and two self-destruct inputs triggering immediate memory wipe. Tamper sensors feed into programmable countermeasures that respond to thermal, voltage, or physical probe attacks before data exposure occurs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 8051-compatible, 4-clock-per-machine-cycle execution |
| Max Operating Frequency | 25MHz - enables 160ns single-cycle instruction execution |
| Encryption Engine | Hardware-accelerated single- and triple-DES - enables in-place execution of encrypted code without decryption overhead |
| Memory Protection | Partitionable memory segments (4KB–256KB) with independent encryption keys - prevents cross-segment data leakage |
| Tamper Response | Dual self-destruct inputs + thermal/voltage/probe sensors - triggers immediate zeroization of SRAM and cryptographic keys upon attack detection |
| Real-Time Clock | On-chip RTC with alarm interrupt - operates from VBAT backup supply, independent of main power rail |
| Random Number Generation | True RNG (not PRNG) - certified entropy source for cryptographic key generation and nonce creation |
Pinout & Package
DS5250F-125+ uses a 100-pin MQFP (Metric Quad Flat Package) with 0.5mm lead pitch, RoHS-compliant and lead-free. Package dimensions are 14mm × 20mm × 1.4mm (body height).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RST | Reset Input | Active-low synchronous reset; initiates secure boot sequence and memory zeroization if tamper flags are set |
| XTAL1 / XTAL2 | Crystal Oscillator Inputs | Supports external crystal (1–25MHz) or CMOS clock input; drives internal PLL for CPU and peripheral timing |
| VBAT | RTC Backup Supply | Provides power to real-time clock and 2KB battery-backed SRAM during main power loss |
| SDI1 / SDI2 | Serial Data Inputs | Two independent serial ports supporting UART, SPI, or custom protocols; used for secure bootloader communication |
| PE1 / PE2 / PE3 / PE4 | Programmable Enable Outputs | Control external memory enable signals (CExN) and bus arbitration for up to 4MB address space expansion |
| VRST | Voltage Monitor Reset | Triggers early-warning power-fail interrupt and hardware reset when VCC drops below 4.25V ±5% |
Key Features
| Feature | Design Value |
|---|---|
| 4096-bit Modulo-Arithmetic Accelerator (MAA) | Offloads RSA/ECC modular exponentiation, reducing public-key operation time from seconds to milliseconds |
| In-Application Programmability | Enables field-upgradable firmware without external programmer - critical for PCI PTS-certified terminal lifecycle management |
| Secure-Loader Mode | Verifies digital signature of incoming firmware images using embedded public key before execution or storage |
| CRC-16/32 Generator | Hardware-accelerated checksum calculation for memory integrity validation and communication frame error detection |
| Watchdog Timer with Independent Clock | Guarantees system recovery from software lockup even during power brownouts or clock glitches |
Applications
| PIN Pad Systems | EMV Financial Terminals |
|---|---|
Use Scenario: Secure entry and verification of customer PINs at point-of-sale devices with PCI PTS v6.0 compliance requirements. IC Role / Device Role / Timing Role: Primary cryptographic controller executing encrypted PIN block processing, key derivation, and secure session establishment. Use Value: Hardware DES/3DES engine and tamper sensors meet PCI PTS physical security requirements for Level 3 devices. | Use Scenario: EMV chip card transaction processing in unattended kiosks requiring offline PIN verification and dynamic data authentication. IC Role / Device Role / Timing Role: Host processor managing card interface, cryptographic signing, and secure element communication via ISO 7816-3/4. Use Value: 4096-bit MAA accelerates RSA-2048 signature generation within EMV time limits (<500ms). |
| Secure Firmware Update Gateways | Government ID Card Issuance Systems |
Use Scenario: Remote over-the-air (OTA) firmware updates for deployed payment terminals with zero-trust verification. IC Role / Device Role / Timing Role: Root-of-trust execution environment validating signed update packages before flash programming. Use Value: Secure-loader mode and program memory integrity checking prevent unauthorized or corrupted firmware installation. | Use Scenario: High-assurance personalization of e-passports and national ID cards with biometric template protection. IC Role / Device Role / Timing Role: Cryptographic co-processor generating digital signatures, encrypting biometric templates, and enforcing access policies. Use Value: Unique device ID and true RNG support ICAO Doc 9303 and ISO/IEC 19794-2 compliance for biometric binding. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar secure microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DS5250F-1N5+ | Same die, extended temperature range (-40°C to +85°C) and identical 100-pin MQFP package | Required for outdoor or industrial deployment where ambient temperature exceeds 70°C | Select DS5250F-1N5+ when operating outside commercial temperature range; pinout and firmware are binary-compatible |
| MAX32590 | ARM Cortex-M4F core, integrated secure boot ROM, AES-256 but no native DES/3DES hardware acceleration | Targets newer designs requiring higher throughput and TLS stack support, not legacy 8051-based firmware | Choose MAX32590 only for greenfield designs; not a drop-in replacement due to architecture and instruction set differences |
Compared with DS5250F-125+, DS5250F-1N5+ offers identical security features and pinout with extended temperature tolerance, while MAX32590 provides modern ARM performance and AES acceleration but requires full firmware rearchitecture and lacks native 3DES support required by legacy financial protocols.
Availability
DS5250F-125+ is available at Aetrix Electronics and suitable for PIN pad manufacturing, EMV terminal development, and secure firmware gateway design requiring stable component supply and long-term lifecycle assurance.
Supply support for DS5250F-125+ 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-performance analog and mixed-signal ICs for security, power, and precision applications.
The DS5250F-125+ belongs to Maxim's secure microcontroller product line, engineered specifically for PCI PTS-certified financial transaction systems requiring hardware-enforced confidentiality, integrity, and tamper resistance.
FAQ
What is the maximum operating frequency of the DS5250F-125+?
The DS5250F-125+ operates at up to 25MHz, delivering single-cycle instruction execution in 160ns. This speed is achieved through its four-clocks-per-machine-cycle architecture and 1KB on-chip instruction cache. The DS5250F-125+ maintains full functionality across its specified 0°C to +70°C temperature range at this frequency, with timing validated per Maxim's abridged datasheet Rev 4.
Does the DS5250F-125+ support in-system programming?
Yes, the DS5250F-125+ supports in-system programming via its serial port (SDI1/SDI2), enabling firmware updates without removing the device from the PCB. It also supports in-application programming, allowing user software to modify program or data memory dynamically. This capability is essential for secure bootloader implementation and field updates in PCI PTS-certified terminals using the DS5250F-125+.
How does the DS5250F-125+ handle power failure events?
The DS5250F-125+ integrates both power-fail reset and early-warning power-fail interrupt circuitry. When VCC drops below 4.25V ±5%, the VRST pin asserts an interrupt, giving firmware time to save state before the subsequent hardware reset. This dual-stage response ensures deterministic behavior during brownouts and supports safe shutdown of cryptographic operations in the DS5250F-125+.
What memory types and capacities are integrated in the DS5250F-125+?
The DS5250F-125+ includes 256 bytes of scratchpad RAM, 5KB of internal SRAM (with optional 1KB dedicated stack), 2KB of battery-backed SRAM, and 1KB of instruction cache. External memory interfaces support up to 4MB nonvolatile program and 4MB nonvolatile data memory. All memory segments in the DS5250F-125+ are partitionable and independently encryptable.
Is the DS5250F-125+ pin-compatible with other variants in the DS5250 family?
Yes, the DS5250F-125+ is pin-compatible with DS5250F-1N5+ and DS5250F-125, all sharing the same 100-pin MQFP footprint and signal mapping. Differences are limited to temperature grade and RoHS compliance (+ suffix). Firmware and PCB layout designed for DS5250F-125+ can be reused directly with DS5250F-1N5+ for extended-temperature deployments without modification.
DS5250F-125+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 100-BQFP
- Series:
- DS525x
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- 8051
- Core Size:
- 8-Bit
- Speed:
- 25MHz
- Connectivity:
- -
- Peripherals:
- -
- Number of I/O:
- 38
- Program Memory Size:
- -
- Program Memory Type:
- ROMless
- EEPROM Size:
- -
- RAM Size:
- 5K x 8
- Voltage - Supply (Vcc/Vdd):
- 4.5V ~ 5.5V
- Data Converters:
- -
- Oscillator Type:
- Internal
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
DS5250F-125+ FAQ
1.How can I place an order for DS5250F-125+ through Aetrix?
Please submit a Request for Quotation (RFQ) for DS5250F-125+ 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 DS5250F-125+ reliable?
The price and inventory of DS5250F-125+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS5250F-125+ is usually 5 days.
3.What payment methods are accepted for DS5250F-125+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS5250F-125+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS5250F-125+?
DS5250F-125+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS5250F-125+ 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 DS5250F-125+?
For technical support, including DS5250F-125+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS5250F-125+ requirements.
6.How does Aetrix verify that DS5250F-125+ is sourced from the original manufacturer or authorized distributors?
All DS5250F-125+ 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 DS5250F-125+ meets industry standards.
7.What is the process for return or replacement of DS5250F-125+?
All DS5250F-125+ units undergo pre-shipment inspection (PSI). If there is an issue with DS5250F-125+, 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 DS5250F-125+ part is unused and in its original packaging.
Return procedure for DS5250F-125+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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