Diodes Incorporated AP1704EWG-7

Overview

AP1704EWG-7 from Diodes Incorporated is a 3-pin active-high microprocessor reset supervisor IC in SC59 package, with 2.93 V reset threshold, 240 ms minimum reset timeout, 20 µA typical supply current, and guaranteed reset validity down to VCC = 1 V. It monitors +3.0 V digital power rails in embedded controllers and portable systems to prevent erroneous code execution during brownout or power-up.

For engineers reviewing the AP1704EWG-7 datasheet, AP1704EWG-7 pinout, AP1704EWG-7 application, or AP1704EWG-7 equivalent, key selection criteria include reset threshold accuracy (±1.5% at 25°C), push-pull output drive capability (800 µA high, 1.2 mA low), transient immunity (100 µs @ 100 mV overdrive), and RoHS-compliant green SC59-3L packaging for space-constrained PCB layouts.

Technical Context

The AP1704EWG-7 implements a precision bandgap-based voltage comparator with internal 30 ppm/°C tempco and a monolithic delay timer circuit. Its push-pull RESET output asserts high when VCC falls below 2.93 V and remains high for ≥240 ms after VCC recovers above threshold.

Designed for single-supply operation from 1.0 V to 5.5 V, it features glitch immunity via controlled comparator overdrive response and guarantees valid logic states across –40°C to +105°C junction temperature. The device requires no external components and draws only 20 µA at 25°C.

Key Specifications

Pinout & Package

AP1704EWG-7 is housed in a lead-free, green SC59-3L (SOT-23 compatible) surface-mount package measuring 2.90 mm × 1.30 mm × 1.00 mm, with gull-wing leads and thermal pad omitted.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AP1704EWG-7, APX810S-29SA-7 offers 12× lower quiescent current but reduced timeout margin, while TPS3808G12DBVR trades simplicity for configurability-neither matches the AP1704EWG-7's combination of fixed 2.93 V accuracy, 240 ms hold, and zero-component integration in SC59.

Availability

AP1704EWG-7 is available at Aetrix Electronics and suitable for industrial PLC controllers, portable medical sensors, automotive body control modules, and smart energy meters requiring stable component supply throughout extended product lifecycles.

Supply support for AP1704EWG-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, headquartered in Plano, Texas, with design centers across Asia and manufacturing in China, Taiwan, and the US.

The AP170x series belongs to Diodes' microprocessor supervisory product line, engineered specifically for cost-sensitive, space-constrained embedded systems requiring precise, single-supply reset functionality without external components.

FAQ

What is the reset timeout behavior of AP1704EWG-7 during repeated brownout events?

The AP1704EWG-7 features a retriggerable internal timer: each time VCC falls below 2.93 V, the 240 ms timeout period resets and restarts. This ensures RESET remains asserted continuously during sustained undervoltage, preventing premature release even if VCC briefly recovers above threshold for less than 240 ms.

Can AP1704EWG-7 drive a 10 kΩ pull-down resistor on its RESET output?

No - the AP1704EWG-7 has a push-pull output rated for 800 µA source and 1.2 mA sink. A 10 kΩ pull-down would draw 300 µA at 3 V, exceeding the specified 800 µA high-level drive capability and risking invalid logic-high voltage. External pull-downs are unnecessary and not recommended.

Is AP1704EWG-7 qualified for automotive AEC-Q100 stress testing?

No - AP1704EWG-7 is not AEC-Q100 qualified. It operates across –40°C to +105°C junction temperature and meets industrial reliability standards, but lacks the qualification documentation, test reports, and process controls required for automotive under-hood applications.

How does the 30 ppm/°C tempco affect reset threshold over temperature?

With a nominal 2.93 V threshold and 30 ppm/°C tempco, the maximum deviation over –40°C to +105°C is ±4.4 mV (2.93 V × 30 ppm × 145°C). This yields a total threshold range of 2.926 V to 2.934 V, well within ±1.5% specification and sufficient for robust +3.0 V rail supervision.