STMicroelectronics STM6601CM2DDM6F

Overview

STM6601CM2DDM6F from STMicroelectronics is a smart push-button on/off controller with Smart Reset™ and power-on lockout, designed for secure system power sequencing in battery-powered portable electronics. It features 1.6–5.5 V operating range, 0.6 µA standby current, fixed tON_BLANK power-up blanking time, debounced PB/SR inputs, ±15 kV air-discharge ESD protection, and active-high/low enable output (EN/EN) for MOSFET or DC-DC control - deployed in smartphones and audio players requiring fail-safe startup.

For engineers reviewing the STM6601CM2DDM6F datasheet, STM6601CM2DDM6F pinout, STM6601CM2DDM6F application, or STM6601CM2DDM6F equivalent, this device delivers precise 1.5 V reference (±1% accuracy), industrial –40 to +85 °C operation, TDFN12 2 × 3 mm package, and deterministic power-up confirmation via PSHOLD timing - critical for embedded systems with unresponsive microcontrollers or faulty switches.

Technical Context

The STM6601 implements a state-machine-based power controller with dual voltage monitoring: VTH+ (3.4 V typ.) for startup validation and VTH– for undervoltage detection (200 mV hysteresis). Its Smart Reset™ delay (tSRD) is externally adjustable via CSRD capacitor charging at 1.2 µA, enabling configurable long-push recognition independent of internal timers.

Unlike the STM6600, the STM6601 enforces fixed tON_BLANK timeout (120 ms typ.) for PSHOLD confirmation during power-up - preventing false turn-on if the host processor fails to assert PSHOLD. All outputs (RST, INT, VCCLO, PBOUT) are open-drain with 10 kΩ pull-up support, while EN/EN is push-pull with <0.4 V low-level drive at 4 mA sink.

Key Specifications

Pinout & Package

STM6601CM2DDM6F is housed in a 12-pin TDFN (Thin Dual Flat No-lead) package measuring 2 mm × 3 mm with 0.5 mm pitch and exposed thermal pad. The package supports reflow soldering per JEDEC J-STD-020 and provides low thermal resistance for sustained operation in compact enclosures.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar smart push-button controller applications.

Compared with STM6600CM2DDM6F, STM6601CM2DDM6F adds deterministic tON_BLANK enforcement for robust MCU coordination; versus TPS3808G12DBVR, it integrates full push-button state machine, Smart Reset™, and dual-mode enable output - making it a complete power sequencer rather than a simple supervisor.

Availability

STM6601CM2DDM6F is available at Aetrix Electronics and suitable for smartphone power sequencing, portable audio player startup, industrial handheld terminals, and Bluetooth headset power management requiring stable component supply across extended production lifecycles.

Supply support for STM6601CM2DDM6F 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, and analog/mixed-signal devices for industrial, automotive, and consumer markets.

The STM6600/6601 series belongs to ST's Smart Power-On Controller product line, engineered specifically for fail-safe, low-power push-button interface and power sequencing in portable and battery-operated equipment.

FAQ

What is the purpose of the PSHOLD pin on STM6601CM2DDM6F?

The PSHOLD pin enforces a fixed 120 ms tON_BLANK window after power-on during which the host processor must drive it high to confirm successful startup. If unasserted within this period, EN deasserts to prevent unreliable system boot - a hardware-level safeguard against hung or uninitialized MCUs.

Can STM6601CM2DDM6F operate with a 1.8 V supply?

Yes. STM6601CM2DDM6F supports 1.6 V to 5.5 V operation. At 1.8 V, VTH+ remains functional (3.4 V threshold is internally generated), but VCC must exceed VTH+ for startup - meaning 1.8 V supply alone cannot satisfy VTH+, so it must be used with higher-voltage rails or external supervision.

How does the CSRD pin affect Smart Reset™ behavior?

The CSRD pin accepts an external capacitor that sets tSRD - the additional time PB and SR must be held together before long-press recognition. Charging current is 1.2 µA; tSRD ≈ 1.2 µA × C. With no capacitor, tSRD = 0 and long-press triggers immediately after minimum interrupt time (10 ms).

Is the VREF output mandatory to use even if not connected to circuitry?

Yes. A 1 µF ceramic capacitor must be placed on VREF regardless of usage. This stabilizes the internal reference buffer and prevents oscillation or excessive supply current - omission risks erratic EN/RST behavior and violates ST's layout requirements per datasheet Section 2.