Diodes Incorporated AP1701BWG-7

Overview

AP1701BWG-7 from Diodes Incorporated is a 3-pin active-low microprocessor reset supervisor IC in SC59 package, monitoring +4.38V supply with ±1.5% threshold accuracy, 240ms minimum reset timeout, 20µA typical supply current, and guaranteed reset validity down to VCC = +1V. It provides push-pull RESET output for reliable power-on/brownout detection in embedded microcontroller systems.

For engineers reviewing the AP1701BWG-7 datasheet, AP1701BWG-7 pinout, AP1701BWG-7 application, or AP1701BWG-7 equivalent, key selection criteria include reset threshold tolerance, VCC immunity below 1V, push-pull drive strength, temperature-stable tempco (30 ppm/°C), and compatibility with +3.3V/+5V digital logic interfaces.

Technical Context

The AP1701BWG-7 integrates a precision voltage comparator with internal reference and a 240ms reset timeout timer. Its reset assertion is triggered when VCC falls below 4.38V (typ.), with hysteresis minimized to avoid chatter during slow supply ramps.

It features push-pull output capable of sinking 1.2mA at 0.3V (VCC ≥ VTH min) and sourcing 800µA while maintaining VOH ≥ VCC – 1.5V. The circuit ignores transients ≤100µs at 100mV overdrive, ensuring glitch immunity without external filtering.

Key Specifications

Pinout & Package

AP1701BWG-7 is housed in a lead-free, RoHS-compliant SC59-3L (SOT-23 compatible) surface-mount package measuring 2.90–3.10 mm × 1.50–1.70 mm × 1.00–1.30 mm, optimized for high-density PCB layouts and reflow soldering.

Key Features

Applications

Equivalent & Alternatives

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

Compared with APX809S-43SA-7 and TPS3808G33DBVR, AP1701BWG-7 offers the longest guaranteed reset timeout (240ms) and lowest component count (no pull-up needed), making it optimal for cost-sensitive industrial controllers where timing margin is critical.

Availability

AP1701BWG-7 is available at Aetrix Electronics and suitable for industrial controllers, portable medical devices, automotive body control modules, and networked smart sensors requiring stable component supply and long-term production continuity.

Supply support for AP1701BWG-7 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

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability power management, signal integrity, and protection solutions for industrial, computing, and automotive markets.

The AP170x series was designed specifically for cost-effective, single-function microprocessor reset supervision in space-constrained embedded systems, emphasizing precision threshold stability, low IQ, and push-pull simplicity.

FAQ

Is AP1701BWG-7 pin-compatible with AP1701AWG-7?

Yes - both share identical SC59-3L package and pinout (GND, VCC, RESET). The 'B' suffix denotes 4.38V threshold versus 'A' (4.63V); all other electrical and mechanical characteristics match exactly, enabling drop-in replacement within same threshold tolerance band.

What is the maximum VCC transient amplitude the AP1701BWG-7 can ignore?

At 100mV overdrive (i.e., VCC dipping 100mV below 4.38V threshold), the device ignores transients ≤100µs. This value scales inversely with overdrive magnitude - e.g., a 200mV dip is tolerated only up to ~50µs - per the glitch immunity curve in the datasheet Figure 6.

Does AP1701BWG-7 require an external pull-up resistor on the RESET pin?

No - its push-pull output actively drives both high and low states. Unlike open-drain supervisors, it sources current to pull RESET high when released, eliminating need for external pull-up and reducing leakage paths in battery-critical designs.

Can AP1701BWG-7 operate reliably at –40°C?

Yes - all key parameters including reset threshold (±1.5%), timeout (240ms min), and supply current (20µA typ.) are fully specified from –40°C to +85°C. The 30 ppm/°C tempco ensures threshold drift remains under ±15mV across this range, validated per Rev. 2 datasheet Section 3.