Analog Devices Inc. ADM6384YKS45D3Z-R7

Overview

ADM6384YKS45D3Z-R7 from Analog Devices is a precision microprocessor supervisory circuit in a 4-lead SC70 package, monitoring VCC with a 4.50 V reset threshold and 140 ms minimum reset timeout. It features push-pull active-low RESET output valid down to VCC = 1 V, manual reset input with 52 kΩ internal pull-up, and consumes only 4–7 µA at 1.8–2.5 V. It is used in embedded controllers requiring reliable power-on and brownout reset during industrial temperature operation (−40°C to +125°C).

For engineers reviewing the ADM6384YKS45D3Z-R7 datasheet, ADM6384YKS45D3Z-R7 pinout, ADM6384YKS45D3Z-R7 application, or ADM6384YKS45D3Z-R7 equivalent, key selection criteria include reset threshold accuracy (±2% over temperature), glitch immunity against sub-100 ns transients, guaranteed reset assertion during VCC ramp-up, and compatibility with low-voltage microcontrollers operating down to 1.8 V.

Technical Context

The ADM6384YKS45D3Z-R7 implements a precision bandgap-based voltage reference and comparator architecture to detect VCC falling below its 4.50 V threshold (typical), with 60 ppm/°C temperature coefficient and 2×VTH hysteresis. Its internal debounce logic ensures MR input pulses as short as 1 µs reliably trigger reset, while rejecting noise spikes up to 100 ns.

Reset assertion timing is governed by a fixed timeout generator: after VCC rises above threshold or MR releases, RESET remains low for ≥140 ms (min) before deassertion. The push-pull output stage sinks up to 3.2 mA at VCC ≥ 4.5 V with VOL ≤ 0.4 V, enabling direct interface with standard CMOS inputs without external pull-ups.

Key Specifications

Pinout & Package

ADM6384YKS45D3Z-R7 is housed in a 4-lead SC70 (KS-4) package measuring 2.20 mm × 1.35 mm × 0.90 mm, optimized for space-constrained PCB layouts and reflow-compatible with Pb-free soldering profiles (260°C, 40 sec).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6384TUT45+T and TPS3808G33DBVR, ADM6384YKS45D3Z-R7 offers the smallest footprint (SC70), lowest current at 1.8–2.5 V rails, and factory-trimmed 4.50 V threshold-making it optimal for space- and power-constrained designs requiring exact 4.5 V supervision without calibration.

Availability

ADM6384YKS45D3Z-R7 is available at Aetrix Electronics and suitable for industrial automation, automotive body electronics, and medical device applications requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for ADM6384YKS45D3Z-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 design and manufacturing expertise spanning precision sensing, power management, and signal conditioning.

The ADM6384 family delivers highly accurate, low-power voltage supervision for microprocessor-based systems, specifically engineered for robust operation in harsh environments including automotive under-hood, industrial control, and portable medical equipment.

FAQ

What is the exact reset threshold voltage of ADM6384YKS45D3Z-R7?

The ADM6384YKS45D3Z-R7 has a nominal reset threshold of 4.50 V, with a guaranteed range of 4.39 V (min) to 4.61 V (max) over −40°C to +125°C. This specification is confirmed in Table 1 of the Rev. E datasheet under "RESET THRESHOLD VOLTAGE" for the "ADM6384x45x" variant, which corresponds directly to the "45" in the part number's ordering code.

Does ADM6384YKS45D3Z-R7 support operation down to 1 V supply voltage?

Yes, ADM6384YKS45D3Z-R7 guarantees valid reset output functionality down to VCC = 1 V, as explicitly stated in the General Description and Specifications sections. Its push-pull RESET output remains asserted and logic-low at VCC ≥ 1 V, enabling reliable supervision during deep brownout conditions where other supervisors may fail.

What is the function of the MR pin on ADM6384YKS45D3Z-R7?

The MR (Manual Reset) pin on ADM6384YKS45D3Z-R7 is an active-low input with a built-in 52 kΩ pull-up resistor. Driving MR low for ≥1 µs forces the RESET output low regardless of VCC level. The internal debounce circuit rejects transients <100 ns, and the pin is designed for direct connection to a push-button switch tied to GND.

How does the 140 ms reset timeout of ADM6384YKS45D3Z-R7 behave during power-up?

During power-up, ADM6384YKS45D3Z-R7 asserts RESET low while VCC rises. Once VCC exceeds 4.50 V, RESET remains low for a minimum of 140 ms (and up to 280 ms) before transitioning high. This fixed timeout ensures the monitored microprocessor completes oscillator startup, PLL lock, and memory initialization before release.

Is ADM6384YKS45D3Z-R7 RoHS compliant and what packaging format is supplied?

Yes, ADM6384YKS45D3Z-R7 is RoHS compliant, indicated by the "Z" suffix in the part number. It is supplied in a 3,000-piece tape-and-reel format (R7 designation), using the 4-lead SC70 (KS-4) package, with Pb-free soldering compatibility per JEDEC J-STD-020 (260°C, 40 sec).