MIC2776N-YM5-TR - Adjustable Voltage Supervisor SOT-23-5 | Microchip
部品番号: MIC2776N-YM5-TR ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $0.62 | $0.62 |
| 10 | $0.51 | $5.10 |
| 100 | $0.42 | $42.00 |
| 500 | $0.35 | $175.00 |
| 1,000 | $0.29 | $290.00 |
MIC2776N-YM5-TR 概要
A voltage supervisor (also called a reset generator or supervisory circuit) is a power management IC that watches a supply rail and asserts a reset signal whenever the voltage falls below a defined trip point. Within the component hierarchy, the MIC2776 sits in the power management IC family alongside voltage regulators and battery monitors, serving as the first line of defense against brown-out conditions that could corrupt microcontroller memory or cause uncontrolled I/O states.
Key features include the adjustable under-voltage detector built around a precision 300 mV reference: an external resistor divider sets the trip point to any rail voltage above 0.3V, making the device suitable for monitoring 1.8V, 2.5V, 3.3V, and 5V systems. The manual reset (MR) input allows a push-button or host processor to force a reset, and hysteresis on the comparator prevents chatter near the threshold. The reset timeout is at least 140 ms, set by an external capacitor on the delay pin, ensuring processors have adequate stabilization time before code execution begins.
Internally, the MIC2776 combines a bandgap reference, a micropower comparator, a delay generator, and an open-drain output stage. The open-drain output can be pulled up to any voltage rail, permitting level translation between the monitored rail and the target processor's reset input - a key advantage when supervising a 1.8V core from a 3.3V domain. Quiescent current is in the microampere class, so the device adds negligible load to battery-powered rails.
Typical applications include reset generation for 8-bit and 32-bit microcontrollers (such as the Motorola 68HC11 family cited in the Microchip datasheet), battery-powered portable instruments, industrial control nodes, and set-top or consumer electronics requiring a reliable brown-out guard.
Design consideration: because the trip point is set by an external divider, use 1% or better tolerance resistors and account for the internal hysteresis when calculating the release threshold, so noise near the comparator trip region does not cause repeated resets.
This page adds value beyond the manufacturer datasheet by synthesizing distributor pricing tiers, pin-compatible drop-in alternatives, comparison tables, and practical design notes in one place.
Pricing shown as of 2026-10-16.
ドロップイン代替品: MIC2776N-YM5-TR — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
クイック比較ツール — 並列比較する代替部品を選択:
MIC2776N-BM5-TR
✅ ドロップイン📋 参考代替品（カタログ未掲載）
MIC2778-2YM5-TR
✅ ドロップイン📋 参考代替品（カタログ未掲載）
MCP1316T-29LE/TT
✅ ドロップイン📋 参考代替品（カタログ未掲載）
MIC2776N-YM5-TR 仕様
| 機能 | Adjustable voltage supervisor with manual reset |
| Number of Monitored Voltages | 1 |
| Internal Reference Threshold | 0.3 V |
| Reset Output Polarity | Active-Low |
| Reset Output Type | Open Drain or Open Collector |
| Reset Timeout | 140 ms minimum |
| Manual Reset Input | Yes (MR pin) |
| Adjustable Trip Point | Yes, via external resistor divider (above 0.3 V) |
| パッケージ | SOT-23-5 (SC-74A / SOT-753) |
| ピン数 | 5 |
| 実装タイプ | Surface Mount |
| Packaging | Tape and Reel (TR) |
| RoHS ステータス | Compliant |
MIC2776N-YM5-TR ピン構成
| ピン 1 | MR — Manual reset input; drive low to assert reset |
| ピン 2 | GND — Ground reference |
| ピン 3 | RST — Active-low reset output (open drain, requires pull-up) |
| ピン 4 | IN — Under-voltage detector input; compare against 0.3 V reference via external divider |
| ピン 5 | CT — Reset timeout delay capacitor pin; sets reset pulse duration (140 ms min with recommended arrangement) |
主な用途
MIC2776N-YM5-TR の用途: 6 件s: Microcontroller Power-On Reset, Battery-Powered Portable Devices, Industrial Control and PLC I/O Modules, Consumer Electronics Brown-Out Protection, Multi-Rail Power Sequencing Assist, Test and Measurement Instrumentation.
Microcontroller Power-On Reset
The primary use of the MIC2776N-YM5-TR is generating a clean power-on reset (POR) for microcontrollers and microprocessors. The adjustable 0.3 V reference allows the trip point to be set precisely to the MCU's minimum safe operating voltage - for example, dividing a 3.3 V rail so the reset releases only above roughly 2.9 V. The 140 ms minimum reset timeout holds the processor in reset while its oscillator and internal LDOs stabilize, preventing illegal opcode execution during power-up. Because the output is open-drain, it connects directly to the processor reset pin with a single pull-up, as shown in the Microchip datasheet's Motorola 68HC11 example. The manual reset pin additionally enables external reset control from test fixtures or a host.
おすすめ
Battery-Powered Portable Devices
In battery-operated products, the MIC2776N-YM5-TR protects against brown-out resets that corrupt configuration memory as the cell discharges. The device's micropower consumption means it adds negligible drain to the battery budget, which is critical for products that must survive months in standby. The adjustable threshold lets designers set a reset point above the battery's end-of-discharge voltage - for instance, resetting a lithium cell system when the divided rail indicates a cutoff-level voltage - and the internal hysteresis prevents reset chatter near that threshold as the battery recovers after load removal. The tiny SOT-23-5 package fits dense wearable or handheld layouts, and the manual reset input can double as a low-power on/off reset control.
おすすめ
Industrial Control and PLC I/O Modules
Industrial 24 V systems derive 3.3 V and 5 V logic rails that sag during motor starts or line transients. The MIC2776N-YM5-TR, with its adjustable trip point set by an external divider, supervises these derived rails and holds industrial microcontrollers in reset until the supply is proven stable, preventing corrupted EEPROM calibration data or uncontrolled actuator outputs. The wide flexibility of the resistor divider means one PCB design can be trimmed for different rail voltages across a product family. Its active-low open-drain output interfaces cleanly with reset inputs that are pulled to either 3.3 V or 5 V domains, and the manual reset pin supports operator reset switches on module front panels.
おすすめ
Consumer Electronics Brown-Out Protection
Set-top boxes, small appliances, and smart-home endpoints use the MIC2776N-YM5-TR to guarantee that flash-based firmware never executes during a marginal power condition. A brown-out during a flash write can brick a consumer product; the supervisor's 140 ms minimum timeout ensures the rail has fully recovered - and stayed recovered - before the MCU leaves reset. The RoHS-compliant SOT-23-5 package supports high-volume automated assembly, and the sub-dollar pricing keeps BOM impact minimal. Because the trip point is adjustable, the same supervisor covers 5 V, 3.3 V, and 1.8 V rails across multiple product derivatives, simplifying procurement and second-source strategy for high-volume manufacturing.
おすすめ
Multi-Rail Power Sequencing Assist
Processors and FPGAs often require that a core rail and an I/O rail power up in a defined relationship. The MIC2776N-YM5-TR can supervise the first (core) rail and use its open-drain active-low output to hold the second rail's LDO enable or the processor's reset in an inactive state until the core rail is valid. The open-drain output pulled to the I/O domain gives clean level translation between rails, and the adjustable 0.3 V reference divider lets the release threshold be set anywhere above 0.3 V. The manual reset input can be driven by another supervisor or by the host for system-wide reset coordination. The microamp supply current makes per-rail supervision practical even in always-on systems.
おすすめ
Test and Measurement Instrumentation
Bench instruments and data-acquisition modules use the MIC2776N-YM5-TR to protect ADC/DSP calibration constants and guarantee deterministic startup after power interruptions. The supervisor's adjustable threshold accommodates precision analog rails (for example, monitoring a 5 V analog rail with a trip point near 4.6 V so measurements stay valid), and the manual reset pin allows operators or automated test sequences to re-initialize the instrument without cycling power. Hysteresis keeps the reset clean in electrically noisy lab environments, and the open-drain output integrates with processor reset logic pulled to digital or analog supply domains. The 140 ms timeout ensures stable reference and clock circuits before measurement firmware runs.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: MIC2776N-YM5-TR — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | MIC2776N-BM5-TR | MIC2778-2YM5-TR | MCP1316T-29LE/TT |
|---|---|---|---|---|
| Package | SOT-23-5 | SOT-23-5 - same | SOT-23-5 - same | SOT-23-5 - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Trip Point | Adjustable (0.3 V reference + divider) | Adjustable (0.3 V reference + divider) | Fixed threshold option (family variant) | Fixed 2.9 V |
| Monitored Channels | 1 | 1 | 1 | 1 |
主な差別化要因
- Fully adjustable trip point with 0.3 V reference （vs MCP1316T-29LE/TT)
- Manual reset input included （vs MCP1316T-29LE/TT)
- Same-family cross-grade availability （vs MIC2776N-BM5-TR)
設計ノート
Place the resistor divider for the IN pin as close to the MIC2776 as possible and route it away from switching-node traces; the IN pin compares against a 0.3 V reference, so any coupled noise is amplified by the divider ratio. Use 1% or better tolerance divider resistors, and keep the divider impedance in the tens-to-hundreds of kilo-ohm range to balance accuracy against leakage-error sensitivity. Add a small ceramic capacitor (for example 1 nF, subject to your timing budget) at IN to filter fast transients without materially delaying response. This page's guidance is estimated from the Microchip MIC2776 datasheet application section.
The RST output is open drain - forgetting the pull-up resistor is the most common bring-up failure, resulting in a reset line that never asserts. Choose a pull-up in the 4.7k to 100k range to the logic domain of the target processor, not necessarily the monitored rail. Also confirm the polarity suffix when ordering: the MIC2776 family offers a choice of active-high or active-low outputs per the Microchip product page, and the -N in MIC2776N-YM5-TR denotes the active-low open-drain option. Mixing up polarity variants will invert system reset behavior.
Estimated: budget the supervisor into the system reset-release timing. With the datasheet's 140 ms minimum reset timeout, the monitored rail must reach and hold the divided trip voltage for the full timeout before the processor releases; at cold temperature and with slow-rising soft-start regulators, verify that the regulator output is monotonic and above the release threshold for the entire interval. Include the threshold hysteresis when calculating the release point so a rail that recovers just above the trip level, then sags again, does not produce repeated reset toggling.
コンプライアンス情報
Abacus Technologies compliance data lists EU RoHS Compliant, REACH Compliant, and DRC Conflict Free status for MIC2776N-YM5. AEC-Q100 qualification is not stated in the provided data for this part.
