S-80830ALY - High-Precision Voltage Detector Technical Summary

S-80830ALY - Super-Small Package High-Precision Voltage Detector

Overview

The S-80830ALY is part of the S-808 Series of high-precision voltage detectors developed by Seiko Instruments Inc. using advanced CMOS process technology. This component features an internally fixed detection voltage with an exceptional accuracy of ±2.0%. Designed for applications requiring reliable voltage monitoring, the S-80830ALY is available in two output configurations: N-channel open-drain and CMOS, providing flexibility for various circuit designs. Its super-small package makes it ideal for space-constrained applications.

Features

High Precision: Detection voltage accuracy of ±2.0%.
Low Current Consumption: Optimized for power-sensitive applications.
Two Output Types: N-channel open-drain and CMOS output configurations.
Super-Small Package: Compact form factor suitable for space-constrained designs.
Wide Operating Voltage Range: Compatible with a broad range of supply voltages.
Built-in Hysteresis: Ensures stable operation and noise immunity.
CMOS Process Technology: Provides low power consumption and high reliability.

Applications

The S-80830ALY is designed for a variety of applications where precise voltage monitoring is critical. Common use cases include:

Battery-Powered Devices: Voltage monitoring in portable electronics to prevent over-discharge.
Power Management Systems: Ensuring stable voltage levels in power supplies and regulators.
Microcontroller Reset Circuits: Providing reliable reset signals during power-up or brown-out conditions.
Industrial Control Systems: Monitoring voltage levels in automation and control equipment.
Consumer Electronics: Used in devices such as digital cameras, smartphones, and wearables.

Electrical Characteristics

Absolute Maximum Ratings

Supply Voltage (VDD): -0.3V to +10.0V
Output Voltage (VOUT): -0.3V to VDD + 0.3V
Output Current (IOUT): ±10mA
Operating Temperature Range: -40°C to +85°C
Storage Temperature Range: -55°C to +125°C

Typical Electrical Characteristics

Detection Voltage (Vdet): 3.0V ±2.0%
Release Voltage (Vrel): Typically 2.9V (with built-in hysteresis)
Supply Current (IDD): 1.0µA (typical) at VDD = 3.0V
Output Leakage Current (Ileak): 0.1µA (max) at VOUT = VDD
Response Time (tRES): 50µs (typical) for voltage detection

Package Information

Dimensions

The S-80830ALY is available in a super-small package with the following dimensions:

Package Type: SOT-23-5
Length: 2.9mm (max)
Width: 1.6mm (max)
Height: 1.2mm (max)
Lead Pitch: 0.95mm

Taping and Reel Specifications

Tape Width: 8mm
Reel Diameter: 180mm
Quantity per Reel: 3,000 units

Marking Information

The S-80830ALY features a laser-marked code on the package for identification. The marking includes the part number and lot code for traceability.

Block Diagram and Pin Assignment

Pin Configuration (SOT-23-5 Package)

Pin 1 (VOUT): Output pin (N-channel open-drain or CMOS)
Pin 2 (GND): Ground reference
Pin 3 (NC): No connection (reserved for future use)
Pin 4 (VDD): Supply voltage input
Pin 5 (NC): No connection (reserved for future use)

Block Diagram

The internal block diagram of the S-80830ALY consists of a voltage reference, comparator, hysteresis circuit, and output driver. The comparator monitors the input voltage and triggers the output when the voltage crosses the detection threshold.

Test Circuits and Standard Circuit

The S-80830ALY can be tested using standard voltage monitoring circuits. A typical application circuit includes a pull-up resistor (for open-drain output) or direct connection (for CMOS output) to the monitored voltage rail. Test circuits for evaluating performance under various conditions are provided in the datasheet.

Operation

The S-80830ALY operates by continuously comparing the supply voltage (VDD) with the internal reference voltage. When VDD falls below the detection voltage (Vdet), the output is activated (either pulled low for open-drain or driven high/low for CMOS). The built-in hysteresis ensures stable operation by preventing output oscillation near the detection threshold.

Characteristics (Typical Performance)

Detection Voltage vs. Temperature: Stable across the operating temperature range.
Supply Current vs. Supply Voltage: Minimal variation with voltage changes.
Output Response Time: Consistent performance under varying load conditions.

Application Circuit Examples

Example circuits include battery voltage monitoring, microcontroller reset generation, and power supply sequencing. The datasheet provides detailed schematics for each configuration, including component values and layout recommendations.

Remarks

For optimal performance, it is recommended to place a bypass capacitor (0.1µF) close to the VDD pin. Care should be taken to minimize noise on the supply rail to ensure accurate voltage detection.

Frequently Asked Questions

Q: Can the S-80830ALY be used with lithium-ion batteries?

A: Yes, the S-80830ALY is suitable for monitoring lithium-ion battery voltage, providing an alert when the battery voltage drops below the detection threshold.

Q: What is the difference between N-channel open-drain and CMOS output types?

A: The N-channel open-drain output requires an external pull-up resistor and can only sink current, while the CMOS output can both source and sink current without an external resistor.