Analog Devices Inc. ADM6318CY46ARJZ-R7

Overview

ADM6318CY46ARJZ-R7 from Analog Devices is a supervisory IC with integrated watchdog timer and dual push-pull reset outputs (active-low RESET and active-high RESET), configured for 4.63 V reset threshold, 140 ms minimum reset timeout, and 1.6 s typical watchdog timeout. It operates over −40°C to +85°C in 5-lead SOT-23 and supports microprocessor power-on/brownout supervision and code execution integrity monitoring in portable and industrial embedded systems.

For engineers reviewing the ADM6318CY46ARJZ-R7 datasheet, ADM6318CY46ARJZ-R7 pinout, ADM6318CY46ARJZ-R7 application, or ADM6318CY46ARJZ-R7 equivalent, key selection criteria include its dual-reset output architecture, guaranteed reset validity down to VCC = 1 V, 5 µA typical supply current, glitch-immune VCC monitoring, and compatibility with manual reset–free system designs.

Technical Context

The ADM6318CY46ARJZ-R7 implements independent reset generation triggered by VCC falling below 4.63 V ±2.5%, MR assertion (not present on this variant), or WDI timeout after 1.6 s. Its dual push-pull outputs drive both active-low and active-high reset lines simultaneously without external components, enabling direct interface to processors requiring complementary reset signals.

Watchdog functionality clears on any WDI logic transition (min. 50 ns pulse width) and resets the timer on VCC undervoltage or WDI floating - no manual reset input is included, distinguishing it from ADM6316/ADM6317 variants. The device guarantees valid reset states across full industrial temperature range and maintains operation down to VCC = 1 V.

Key Specifications

Pinout & Package

ADM6318CY46ARJZ-R7 is housed in a 5-lead SOT-23 package (JEDEC MO-178-AA compliant, 2.90 mm × 1.60 mm × 1.15 mm). Pin 1 is RESET (active-low), Pin 2 is GND, Pin 3 is RESET (active-high), Pin 4 is WDI, and Pin 5 is VCC.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADM6318CY46ARJZ-R7, ADM6316CY46ARJZ-R7 adds manual reset but removes active-high output, while ADM6320CY46ARJZ-R7 trades dual outputs for open-drain flexibility and MR - all share identical threshold, timeout, and watchdog timing but differ in reset interface architecture and system integration requirements.

Availability

ADM6318CY46ARJZ-R7 is available at Aetrix Electronics and suitable for microprocessor power-up sequencing, embedded controller brownout recovery, watchdog-monitored firmware execution, and portable medical device supervision requiring stable component supply and RoHS-compliant packaging.

Supply support for ADM6318CY46ARJZ-R7 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, with engineering expertise spanning precision sensing, power management, and reliability-critical IC design.

The ADM63xx family was designed specifically for robust microprocessor supervision in space-constrained, low-power, and thermally demanding environments - emphasizing glitch immunity, wide VCC operating range, and deterministic reset timing across industrial temperatures.

FAQ

What is the reset threshold voltage of the ADM6318CY46ARJZ-R7?

The ADM6318CY46ARJZ-R7 has a factory-trimmed reset threshold of 4.63 V, specified with ±2.5% tolerance over the full industrial temperature range (−40°C to +85°C). This value is confirmed in Table 5 of the Rev. I datasheet and corresponds to threshold number 46 in the ordering nomenclature. The device guarantees valid reset assertion as long as VCC remains below this threshold, supporting reliable brownout detection for 5 V systems.

Does the ADM6318CY46ARJZ-R7 include a manual reset input?

No, the ADM6318CY46ARJZ-R7 does not include a manual reset (MR) input. Per Table 1 in the datasheet, the ADM6318 variant is defined as having watchdog input (WDI) and dual push-pull reset outputs but no MR pin. This distinguishes it from ADM6316 and ADM6317, which include MR. The ADM6318CY46ARJZ-R7 relies solely on VCC monitoring and WDI supervision for reset generation.

What are the watchdog timeout options available for the ADM6318CY46ARJZ-R7?

The ADM6318CY46ARJZ-R7 is configured with the "Y" watchdog timeout option, delivering a typical timeout period of 1.6 seconds (with min/max of 1.12 s / 2.24 s). This is fixed at manufacture and cannot be adjusted externally. The "Y" option is one of four factory-programmed choices (W/X/Y/Z), and is selected via the fourth character in the part number suffix - "CY46" confirms Y = 1.6 s typical.

How does the dual reset output architecture of the ADM6318CY46ARJZ-R7 benefit system design?

The ADM6318CY46ARJZ-R7 provides simultaneous active-low RESET and active-high RESET outputs (Pins 1 and 3), allowing direct connection to microprocessors or FPGAs requiring either polarity without external inverters or pull resistors. This reduces BOM count, PCB area, and potential signal integrity issues - especially valuable in space-constrained portable and medical devices where layout efficiency and reliability are critical.

Is the ADM6318CY46ARJZ-R7 RoHS compliant and what is its packaging format?

Yes, the ADM6318CY46ARJZ-R7 is RoHS compliant, as indicated by the "Z" suffix in the part number and confirmed in the Ordering Guide. It is supplied in a 3,000-piece 5-lead SOT-23 tape-and-reel package (package code RJ-5), per JEDEC MO-178-AA standard dimensions. The "R7" suffix denotes RoHS-compliant 3,000-piece reel packaging, and the marking code is "M4Q" per the datasheet's Ordering Guide.