MAX810TEXR+ - 3.08V Reset Supervisor, SC-70-3 | Analog Devices
料号： MAX810TEXR+ ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $1.84 | $1.84 |
| 10 | $1.62 | $16.20 |
| 100 | $1.21 | $121.00 |
| 500 | $0.97 | $485.00 |
| 1,000 | $0.78 | $780.00 |
MAX810TEXR+ 概述
A microprocessor reset circuit (also called a voltage supervisor or power-on reset IC) is a specialized monitor IC that sits between a system power rail and a microcontroller's RESET pin. Unlike discrete RC reset networks, supervisor ICs provide a precise, temperature-stable threshold, a defined reset pulse width, and immunity to brown-out events. In the hierarchy of power management semiconductors, the MAX810 family belongs to the supervisor and reset sub-category, complementing voltage regulators and DC-DC converters rather than replacing them.
Key features of the MAX810TEXR+ include ultra-low supply current of typically 1.5 µA (max 17 µA over temperature), push-pull totem-pole output topology, no external components required, and a wide operating temperature range of -40 °C to +105 °C. The 3-pin SC-70-3 footprint is among the smallest reset-IC packages available, enabling its use in space-constrained wearables, IoT sensor nodes, and portable medical devices. According to the manufacturer datasheet, the part is fully specified over commercial and industrial temperature grades.
Internally, the MAX810 combines a precision bandgap reference, a comparator, and a timing generator that produces the reset delay. The push-pull output stage eliminates the need for an external pull-up resistor, simplifying PCB layout and reducing BOM cost versus open-drain alternatives such as the MAX803. The totem-pole driver can source and sink current directly into the MCU reset input, supporting both 3.3 V and 5 V logic levels depending on VCC.
Typical applications include 3.3 V microcontroller supervision in IoT endpoints, battery-powered portable electronics, embedded modules and SBCs, USB peripherals, and industrial sensor nodes. The MAX810TEXR+ is also commonly paired with low-power MCUs such as the STM32L0, PIC32MX, and MSP430 families to guarantee defined startup behavior after a brown-out or battery swap.
When designing with this part, place it as close as possible to the MCU reset pin and keep the VCC trace short to minimize false resets from load transients. The push-pull output does not require a pull-up resistor, which saves board area. Avoid routing noisy switching signals adjacent to the supervisor's VCC pin.
This page synthesizes distributor pricing, same-family drop-in alternatives, and practical design notes not consolidated in the manufacturer datasheet, enabling faster engineering decisions.
直接替换替代料： MAX810TEXR+ ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
快速对比工具——选择替代料号进行并排对比：
MAX810TEXR+T
✅ 直接替换📋 参考替代料（不在目录中）
MAX810TEXR+T10
✅ 直接替换📋 参考替代料（不在目录中）
MAX803R
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
MAX809R
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
CAT810TSDI-T10
✅ 直接替换📋 参考替代料（不在目录中）
CAT803TSDI-T10
✅ 直接替换📋 参考替代料（不在目录中）
MAX810TEXR+ 规格参数
| 功能 | Microprocessor Reset Circuit |
| Number of Supervisors | 1 |
| Reset Threshold Voltage (T suffix) | 3.08 V |
| Reset Output | Active Low, Push-Pull (Totem Pole) |
| Reset Pulse Width (typ) | 240 ms |
| Reset Pulse Width (min) | 140 ms |
| Supply Voltage Range | 1.0 V to 5.5 V |
| Supply Current (typ) | 1.5 uA |
| Supply Current (max over temp) | 17 uA |
| 工作温度范围 | -40 C to +105 C |
| 封装 | SC-70-3 (SOT-323) |
| 安装类型 | Surface Mount |
| Output Drive Type | Push-Pull |
| 引脚数 | 3 |
| RoHS 状态 | Compliant |
MAX810TEXR+ 引脚配置
| 引脚 1 | RESET — Active-low reset output (push-pull) |
| 引脚 2 | GND — Ground |
| 引脚 3 | VCC — Supply voltage input (1.0 V to 5.5 V) |
典型应用
MAX810TEXR+ 适用于 6 应用s: 3.3V Microcontroller Brown-Out Protection, IoT Sensor Node Power Supervision, Portable Medical Device Reset Management, USB Peripherals and Embedded Modules, Industrial Sensor and Field Transmitter, Wearable Fitness Tracker Power Manager.
3.3V Microcontroller Brown-Out Protection
The MAX810TEXR+ provides a guaranteed reset to 3.3 V microcontrollers when VCC drops below 3.08 V, preventing code-execution errors during voltage brown-outs. Its 1.5 µA typical quiescent current adds negligible load to battery-powered designs, while the push-pull output directly drives the MCU reset pin without an external pull-up resistor. Place the supervisor within 5 mm of the MCU VCC pin and keep the trace short to minimize noise-induced false resets during high-current load transients.
推荐
IoT Sensor Node Power Supervision
In battery-powered IoT sensor nodes, the MAX810TEXR+ supervises the 3.3 V LDO output rail and asserts a 240 ms active-low reset whenever the battery droops below the safe operating threshold. The ultra-low 1.5 µA Iq preserves battery life during deep-sleep periods, while the tiny SC-70-3 footprint saves precious PCB area in coin-cell designs. Pair it with a low-Iq LDO and an energy-harvester IC for multi-year battery endurance in field-deployed wireless sensors.
推荐
Portable Medical Device Reset Management
The MAX810TEXR+ is well-suited for portable medical devices such as glucose meters, pulse oximeters, and wearable health monitors that operate from a 3.3 V regulated rail. Its 3.08 V threshold ensures the host MCU resets cleanly when the battery is nearly depleted, preventing measurement errors or data corruption in patient-critical records. The -40 C to +105 C operating range covers the full environmental envelope for medical and wearable applications.
推荐
USB Peripherals and Embedded Modules
In USB peripherals and single-board computers, the MAX810TEXR+ supervises the 3.3 V rail derived from the USB 5 V bus and ensures the host MCU enters a known reset state after hot-plug events or VBUS glitches. Its push-pull output directly drives the MCU reset pin with no external pull-up required, simplifying the BOM and reducing PCB area in space-constrained dongles. The 1.0 V to 5.5 V supply range tolerates USB suspend current spikes gracefully.
推荐
Industrial Sensor and Field Transmitter
The MAX810TEXR+ provides deterministic reset behavior for industrial 4-20 mA loop-powered transmitters and sensor interfaces operating from a 3.3 V LDO rail. Its wide operating temperature range (-40 C to +105 C) covers outdoor and factory-floor deployments, while the 240 ms reset pulse guarantees clean startup of the host MCU after power interruptions common in industrial environments. The SC-70-3 package is robust enough for conformal-coated PCBs.
推荐
Wearable Fitness Tracker Power Manager
In wearable fitness trackers and smartwatches, the MAX810TEXR+ supervises the small Li-ion battery voltage after the LDO and asserts reset before the battery voltage falls below the MCU brown-out threshold. The 1.5 µA Iq extends standby battery life by weeks compared to discrete RC reset networks, and the 3-pin SC-70-3 footprint fits beside tiny PMICs and chargers. It pairs naturally with ultra-low-power MCUs and AMOLED display drivers in wrist-worn devices.
推荐
推荐产品汇总
工程参考数据： MAX810TEXR+ ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | MAX810TEXR+T | MAX810TEXR+T10 | MAX803R | MAX809R | CAT810TSDI-T10 |
|---|---|---|---|---|---|---|
| Package | SC-70-3 (SOT-323) | SC-70-3 (SOT-323) - same | SC-70-3 (SOT-323) - same | SC-70-3 (SOT-323) - same | SC-70-3 (SOT-323) - same | SC-70-3 (SOT-323) - same |
| Brand | Analog Devices | Analog Devices - same | Analog Devices - same | Analog Devices - same | Analog Devices - same | onsemi - cross-brand |
| Reset Threshold (T suffix) | 3.08 V | 3.08 V | 3.08 V | 2.63 V (R suffix) | 2.63 V (R suffix) | 3.08 V |
| Output Type | Push-Pull (Totem Pole) | Push-Pull | Push-Pull | Open-Drain | Push-Pull | Push-Pull |
| External Pull-up Required | No (push-pull) | No | No | Yes (open-drain) | No | No |
关键差异点
- Smallest 3-pin footprint for 3.3V supervisor （对比 MAX809R)
- Push-pull output eliminates external pull-up （对比 MAX803R)
- Direct cross-brand equivalent available from onsemi （对比 CAT810TSDI-T10)
设计说明
Place the MAX810TEXR+ within 5 mm of the MCU VCC pin to keep the supply trace short and minimize false resets caused by load transients. Add a 0.1 µF ceramic bypass capacitor directly adjacent to pin 3 (VCC) of the supervisor, even though the part does not strictly require it, because fast MCU current spikes can couple into the supervisor reference and cause nuisance resets. Avoid routing noisy switching signals or high-current traces adjacent to the VCC pin.
Do not confuse the MAX810 with the MAX803 family: the MAX810 has a push-pull output that does NOT need an external pull-up resistor, while the MAX803 is open-drain and REQUIRES a pull-up to VCC. Substituting a MAX803R on a MAX810 footprint will cause the reset line to never reach a valid logic-high state, leaving the MCU permanently in reset. Always verify the output topology (push-pull vs open-drain) when substituting in this family.
The MAX810TEXR+ typically draws 1.5 µA quiescent current, but maximum supply current can reach 17 µA over the full -40 C to +105 C operating range. Estimated: in a battery-powered design with a 1000 mAh CR2032 coin cell, this worst-case Iq translates to roughly 3.4 years of standby life (1000 mAh / 17 µA = ~6.7 years theoretical; derate by 50% for self-discharge). For ultra-long-life designs, consider the TPS3823 from TI as a same-package alternative.
合规信息
RoHS compliant per Analog Devices product page and DigiKey listing. Lead-free reflow compatible. Not AEC-Q100 qualified (no automotive grade version offered in the MAX810 series). Halogen-free status not explicitly stated in the verified web data.
