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MAX809STRG

3-pin uP reset monitor, push-pull RESET, 4.63V threshold, SOT-23

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جزء الشركة المصنعة ： جزء الشركة المصنعة

MAX809STRG

الحزمة ： الحزمة

SOT-23-3

الوصف

نظرة عامة على المنتج

The MAX809STRG from onsemi is a 3-pin microprocessor reset circuit in a SOT-23 package. It provides a push-pull active-low RESET output that monitors VCC supply voltages for 2.5V, 3.0V, 3.3V, and 5.0V systems. With a minimum power-on reset pulse width of 140ms and ultra-low supply current of 0.5 µA, this device ensures reliable processor initialization without external components.

المواصفات الرئيسية

الوظيفة	Microprocessor Reset Monitor
نوع الإخراج	Push-Pull Active-Low RESET
Reset Threshold	4.63V (S version, 5V system)
Reset Timeout	140ms minimum
Supply Current	0.5 µA typical at 3.2V
Operating Voltage	1.0V to 5.5V
درجة حرارة التشغيل	-40°C to +105°C
الحزمة	SOT-23-3

الميزات

Precision VCC monitoring for 2.5V, 3.0V, 3.3V, and 5.0V supplies
140ms minimum power-on reset pulse width
RESET output guaranteed valid to VCC = 1.0V
Ultra-low supply current (0.5 µA typical)
VCC transient immunity
No external components required
SOT-23 and SC-70 package options

التطبيقات

Embedded systems and microcontroller supervision
Battery-powered portable equipment
Computers, servers, and workstations
Critical microprocessor power supply monitoring
Intelligent instruments and automotive systems

مقدمة المنتج:MAX809STRG مقدمة المنتج

The MAX809STRG from onsemi is a cost-effective microprocessor supervisory circuit designed to monitor power supply voltages in digital systems. It asserts an active-low RESET output whenever VCC declines below a preset threshold, maintaining the reset for at least 140ms after VCC rises above the threshold. The S suffix indicates a 4.63V threshold suitable for 5V systems. With supply current as low as 0.5 µA and no external components required, this device is ideal for battery-powered and space-constrained applications.

مبدأ العمل:MAX809STRG مبدأ العمل

The MAX809STRG uses an internal voltage reference and comparator to continuously monitor the VCC supply. When VCC falls below the reset threshold (4.63V for the S version), the RESET output is driven low. After VCC rises above the threshold, an internal timeout counter keeps RESET low for a minimum of 140ms to ensure the microprocessor has stabilized before beginning execution. The push-pull output stage provides active drive in both directions, eliminating the need for an external pullup resistor. The device is designed to ignore fast transients on VCC, preventing false reset triggering.

وصف الدبوس:MAX809STRG تعريف الدبوس ووظائفه

دبوس	الاسم	النوع	الوظيفة
1	GND	أرضي	Ground connection
2	إعادة الضبط	المخرجات	Active-low reset output (push-pull)
3	VCC	الطاقة	Supply voltage input (monitored)

Application Scenarios:In which products and applications isMAX809STRG مستعمل

Embedded microcontroller systems requiring reliable power-on reset
Battery-powered portable devices needing ultra-low quiescent current
Computers, servers, and workstations for supply supervision
Automotive ECUs and intelligent instrument monitoring
Hot-plug applications requiring transient-immune reset protection

Alternative Models:What chips are recommended as replacements for MAX809STRG

الشركة المصنعة	رقم الجزء	الحزمة	الملاحظات
الأجهزة التناظرية	MAX809TEUR+T	SOT-23-3	Original Maxim version, 4.63V threshold
أونسمي	MAX810STRG	SOT-23-3	Active-high RESET variant
أونسمي	MAX809MTRG	SOT-23-3	4.38V threshold (M version)
TI	TPS3823-33DBVR	SOT-23-5	3.3V watchdog reset, 5-pin
الرقاقة الدقيقة	MCP130T-300I/TT	SOT-23-3	3.0V reset, open-drain