Analog Devices Inc. ADM8617SAYAKSZ-RL7

Overview

ADM8617SAYAKSZ-RL7 from Analog Devices is a low-voltage supervisory circuit with integrated watchdog timer, designed for microprocessor reset supervision in portable and embedded systems. It monitors VCC at 2.93 V threshold, provides 1 ms reset timeout, 1.6 s watchdog timeout, and features open-drain active-low RESET output in a 4-lead SC70 package - used to ensure reliable power-up sequencing and code execution integrity in battery-powered controllers.

For engineers reviewing the ADM8617SAYAKSZ-RL7 datasheet, ADM8617SAYAKSZ-RL7 pinout, ADM8617SAYAKSZ-RL7 application, or ADM8617SAYAKSZ-RL7 equivalent, key selection criteria include its guaranteed RESET validity down to VCC = 1 V, glitch-immune supply monitoring, precise 2.93 V threshold with ±15 mV tolerance, and compatibility with low-power microcontroller watchdog strobe timing requirements.

Technical Context

The ADM8617SAYAKSZ-RL7 implements a precision bandgap-based voltage reference to generate a stable 2.93 V reset threshold with 40 ppm/°C temperature coefficient and 2 × VTH hysteresis. Its watchdog timer resets on WDI inactivity exceeding 1.6 s (typical), cleared by any logic transition ≥50 ns wide.

RESET assertion occurs when VCC falls below 2.93 V or WDI remains static beyond watchdog timeout; deassertion follows a fixed 1 ms (min) delay after VCC rises above threshold. The open-drain output supports flexible pull-up configurations and guarantees VOL ≤ 0.3 V at ISINK = 1.2 mA (VCC ≥ 2.7 V).

Key Specifications

Pinout & Package

ADM8617SAYAKSZ-RL7 is housed in a 4-lead SC70 (KS-4) package measuring 2.20 mm × 1.35 mm × 0.90 mm, with gull-wing leads and RoHS-compliant finish.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADM8617SAYAKSZ-RL7, MAX6326UT29D3+ offers higher drive capability but sacrifices wiring flexibility, while TPS3808G18DBVR shares the SC70-4 form factor but targets lower-voltage domains - neither matches the exact 2.93 V/1 ms/1.6 s/open-drain specification set of ADM8617SAYAKSZ-RL7.

Availability

ADM8617SAYAKSZ-RL7 is available at Aetrix Electronics and suitable for microprocessor reset supervision, portable medical device safety monitoring, and industrial I/O module recovery requiring stable component supply and long-term lifecycle support.

Supply support for ADM8617SAYAKSZ-RL7 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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA, with design centers worldwide.

The ADM8616/ADM8617 family delivers precision voltage supervision and watchdog functionality for resource-constrained embedded systems, targeting applications where low power, small size, and deterministic reset behavior are critical.

FAQ

What is the exact reset threshold voltage of ADM8617SAYAKSZ-RL7?

The ADM8617SAYAKSZ-RL7 has a nominal reset threshold of 2.93 V, with a guaranteed range of 2.85 V to 3.00 V over −40°C to +85°C. This value is laser-trimmed during production and specified in Table 1 of the Rev. C datasheet under the "ADM861xS" designation, confirming its use in 3.3 V supply monitoring where 2.93 V provides appropriate brownout margin.

Does ADM8617SAYAKSZ-RL7 support watchdog disable without external components?

Yes - ADM8617SAYAKSZ-RL7 supports watchdog disable by leaving the WDI pin unconnected (floating). Internal circuitry detects the floating state and disconnects the watchdog timer from the RESET generation path, eliminating the need for pull-up/pull-down resistors or configuration pins.

Can ADM8617SAYAKSZ-RL7 operate reliably at VCC = 1.2 V?

Yes - ADM8617SAYAKSZ-RL7 guarantees valid open-drain RESET output down to VCC = 1 V, including logic-low assertion (VOL ≤ 0.3 V at ISINK = 100 µA) and functional watchdog timing. At 1.2 V, it draws ~7 µA and maintains full specification compliance per Figure 3 and Table 1.

What is the maximum sink current capability of the RESET pin on ADM8617SAYAKSZ-RL7?

The RESET pin of ADM8617SAYAKSZ-RL7 can sink up to 1.2 mA while maintaining VOL ≤ 0.3 V, provided VCC ≥ 2.7 V. At lower VCC (≥1.2 V), it sustains 100 µA sink with same VOL limit; absolute maximum rating is 20 mA, but sustained operation above 1.2 mA risks violating VOL spec.

Is ADM8617SAYAKSZ-RL7 RoHS compliant and what does the 'Z' suffix indicate?

Yes - ADM8617SAYAKSZ-RL7 is RoHS compliant, as confirmed by the final 'Z' in its ordering code per Figure 17 of the datasheet. This denotes lead-free, halogen-free construction meeting JEDEC J-STD-020 moisture sensitivity level 1 and IPC/JEDEC J-STD-033 handling requirements.