STMicroelectronics STM1404ASMJQ6F

Overview

STM1404ASMJQ6F from STMicroelectronics is a FIPS-140 Level 4 security supervisor IC with four high-impedance physical tamper inputs, over/under voltage detection (2.0 V / 4.2 V thresholds), and customer-selectable over/under temperature monitoring (–25°C to +95°C). It provides automatic battery switchover, open-drain SAL/RST/PFO/BLD outputs, and Vccsw status indication for secure POS terminal power management.

For engineers reviewing the STM1404ASMJQ6F datasheet, STM1404ASMJQ6F pinout, STM1404ASMJQ6F application, or STM1404ASMJQ6F equivalent, this device serves as a tamper-responsive supply supervisor in cryptographic module designs requiring certified physical intrusion detection, battery-backed reset signaling, and voltage/temperature fault reporting under FIPS-140-2 compliance.

Technical Context

The STM1404ASMJQ6F implements independent analog comparators for VCC/VBAT voltage monitoring (2.0 V undervoltage, 4.2 V overvoltage), programmable thermal trip points (TH/TL factory-set), and four dedicated tamper sense pins (TP1–TP4) with NH/NL configurations. Its internal switchover logic routes VOUT between VCC and VBAT based on VSW (~2.4 V) threshold crossing, while maintaining SAL assertion during alarm conditions regardless of supply source.

All critical outputs-SAL, RST, PFO, and BLD-are open-drain with internal pull-down or external pull-up requirements. The Vccsw pin reflects VOUT sourcing state (low = VCC, high = VBAT), and the STM1404A variant includes a 1.237 V reference (VREF) on Pin 9, unused in B/C versions where it functions as VTPU.

Key Specifications

Pinout & Package

STM1404ASMJQ6F uses a RoHS-compliant, lead-free 16-pin QFN package (3 mm × 3 mm, 0.5 mm pitch), optimized for secure, low-profile PCB integration in tamper-evident enclosures.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar security supervisor applications.

Compared with MAX1364 and DS1233M, STM1404ASMJQ6F uniquely integrates four independent tamper detectors, programmable thermal thresholds, and certified battery switchover in a single QFN package-enabling full FIPS-140 Level 4 compliance without supplemental ICs or firmware intervention.

Availability

STM1404ASMJQ6F is available at Aetrix Electronics and suitable for POS terminal security modules, EMVCo-compliant payment devices, banking ATM control boards, and ZKA-certified PIN pads requiring stable component supply with long lifecycle assurance.

Supply support for STM1404ASMJQ6F 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing microcontrollers, power management ICs, sensors, and security solutions for industrial, automotive, and consumer markets.

The STM1404 family belongs to ST's security supervisory product line, engineered specifically to meet stringent physical and environmental intrusion detection requirements in cryptographic modules compliant with FIPS-140, EMVCo, ISO, and ZKA standards.

FAQ

What is the function of the Vccsw pin?

Vccsw indicates the current source of VOUT: it is low when VOUT is supplied from VCC and high when VOUT is supplied from VBAT. This pin serves as a "BATTERY ON" status signal and can drive an external p-channel MOSFET for higher-current VCC bypass. During SAL assertion, its behavior depends on variant: STM1404A maintains normal mode, while STM1404B/C force it high.

How are temperature thresholds configured?

Temperature thresholds (TH and TL) are factory-programmed during production and cannot be modified in the field. Available options include upper limits of +80°C, +85°C, or +95°C and lower limits of –25°C or –35°C. These values are fixed per device order and documented in the ordering code; no external configuration or calibration is required.

Can STM1404ASMJQ6F operate without a backup battery?

Yes, STM1404ASMJQ6F functions as a standard voltage supervisor and tamper detector with VCC only. Battery switchover and VBAT-related features (e.g., BLD, VOUT backup) are disabled when VBAT is unconnected or at 0 V. All tamper, voltage, and temperature monitoring remains fully operational using VCC as the sole supply.

Is the VREF pin present on all STM1404 variants?

No. VREF (1.237 V) is exclusive to the STM1404A variant and appears on Pin 9. In STM1404B and STM1404C, Pin 9 is repurposed as VTPU (tamper pull-up), which connects internally to either VCC or VBAT depending on switchover state. This functional difference is reflected in the part number suffix and must be verified before schematic reuse.