Analog Devices Inc. ADM8696ARWZ-REEL

Overview

ADM8696ARWZ-REEL from Analog Devices is a microprocessor supervisory circuit integrating power-on/brownout reset, adjustable low-line voltage monitoring (1.3 V threshold), watchdog timer with 100 ms/1.6 s or user-adjustable timeout, automatic battery backup switchover (VBATT to VOUT), and power-fail warning (PFI/PFO). It supports VCC from 3.0 V to 5.5 V, asserts RESET down to 1 V VCC, and delivers up to 100 mA from VOUT during main supply operation - used in embedded controllers and automotive microprocessor systems for reliable power sequencing and fault recovery.

For engineers reviewing the ADM8696ARWZ-REEL datasheet, ADM8696ARWZ-REEL pinout, ADM8696ARWZ-REEL application, or ADM8696ARWZ-REEL equivalent, key selection considerations include its dual-mode watchdog (internal oscillator or external clock/capacitor), battery switchover hysteresis (20 mV), 400 nA standby current in backup mode, 50 ms reset pulse width (adjustable), and compatibility with CMOS RAM write protection via BATT ON and LOW LINE outputs.

Technical Context

The ADM8696ARWZ-REEL implements a dual-threshold comparator architecture: LLIN monitors VCC against a precision 1.3 V reference with ~12 mV hysteresis, while PFI compares an external voltage against the same reference for early power-fail detection. Its reset generator guarantees assertion down to 1 V VCC and holds RESET active for 50 ms after LLIN recovers.

Watchdog functionality uses a three-level WDI input (internally biased to 38% of VCC) that resets on any transition; timeout is selectable via OSC SEL and OSC IN - supporting fixed 100 ms/1.6 s periods or externally tuned timing (e.g., 4096 cycles with external clock or 1.6 s × C/47 pF with capacitor). Battery switchover employs PMOS switches with 0.7 Ω on-resistance (VCC→VOUT) and 7 Ω (VBATT→VOUT), enabling seamless transition at <70 mV switchover threshold.

Key Specifications

Pinout & Package

ADM8696ARWZ-REEL is housed in a 16-pin SOIC (R-16) package with 1.27 mm pitch, RoHS-compliant, tape-and-reel format (REEL suffix). Pin functions are electrically validated per Analog Devices' official ADM8696 pin configuration diagram and functional description.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar microprocessor supervisory applications.

Compared with MAX696CPE+ and TPS3823-50DBVR, ADM8696ARWZ-REEL uniquely integrates battery switchover control, ultra-low 0.4 µA backup current, and field-configurable watchdog/reset timing - making it irreplaceable in space-constrained, long-life battery-backed microcontroller designs requiring full power supervision.

Availability

ADM8696ARWZ-REEL is available at Aetrix Electronics and suitable for industrial controllers, automotive infotainment systems, and medical diagnostic equipment requiring stable component supply, long-term lifecycle support, and guaranteed RoHS-compliant sourcing.

Supply support for ADM8696ARWZ-REEL 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

Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA.

The ADM8696ARWZ-REEL belongs to Analog Devices' microprocessor supervisory product line, engineered specifically for robust power monitoring, battery backup management, and fault-tolerant reset generation in mission-critical embedded systems.

FAQ

What is the minimum VCC voltage at which ADM8696ARWZ-REEL guarantees RESET assertion?

ADM8696ARWZ-REEL guarantees RESET assertion down to 1 V VCC, as confirmed in the Absolute Maximum Ratings and General Description sections of the official datasheet. This ensures the microprocessor remains held in reset during deep brownout conditions where other supervisors may release prematurely. The ADM8696ARWZ-REEL maintains this guarantee across its full industrial temperature range (–40°C to +85°C), enabling reliable operation in unstable power environments.

How does ADM8696ARWZ-REEL handle battery switchover during power failure?

ADM8696ARWZ-REEL automatically switches VOUT from VCC to VBATT when LLIN falls below 1.3 V and VCC drops below VBATT minus 70 mV (power-up) or 50 mV (power-down). The internal PMOS switch exhibits 7 Ω on-resistance in battery mode, delivering up to 250 µA at <5 mV dropout. In backup mode, supply current drops to 0.4 µA typical, and BATT ON goes high to signal switchover - enabling direct drive of external PNP transistors for higher current.

Can ADM8696ARWZ-REEL's watchdog timeout be adjusted, and how?

Yes, ADM8696ARWZ-REEL's watchdog timeout is fully adjustable via OSC SEL and OSC IN pins. With OSC SEL high or floating, internal oscillator modes yield 100 ms or 1.6 s timeouts selected by OSC IN logic level. With OSC SEL low, timeout is set by external clock frequency (4096 cycles) or external capacitor value (1.6 s × C/47 pF). This allows precise tuning from ~100 ms to >100 s - verified in Table I and Figure 4 of the datasheet.

What is the function of the BATT ON pin on ADM8696ARWZ-REEL?

The BATT ON pin on ADM8696ARWZ-REEL is an active-high logic output that signals when VOUT is sourced from VBATT instead of VCC. It sinks up to 7 mA and is designed to directly drive the base of an external PNP transistor, extending VOUT current capability beyond the internal 100 mA limit. During normal operation (VCC > VBATT), BATT ON is low; during battery backup, it goes high - providing both status indication and boost control in a single pin.

Does ADM8696ARWZ-REEL support both active-high and active-low reset outputs?

Yes, ADM8696ARWZ-REEL provides complementary reset outputs: active-low RESET (Pin 15) and active-high RESET (Pin 16). Both are guaranteed functional down to 1 V VCC. RESET (Pin 15) pulls low during undervoltage or watchdog timeout; RESET (Pin 16) is its logical inverse and sources up to 1 µA at 3.5 V (VCC = 5 V). This dual-output architecture eliminates need for external inverters when interfacing with processors requiring either reset polarity.