MAX1361MEUB+T - 4-Ch 10-Bit System Monitor ADC | Maxim
MPN: MAX1361MEUB+T ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.42 | $6.42 |
| 10 | $5.78 | $57.80 |
| 100 | $4.55 | $455.00 |
| 500 | $3.92 | $1,960.00 |
| 1,000 | $3.41 | $3,410.00 |
MAX1361MEUB+T Overview
An ADC (Analog-to-Digital Converter) is a mixed-signal integrated circuit that converts continuous analog voltages into discrete digital codes, and a system monitor is a specialized ADC class that adds autonomous threshold detection so a host processor is interrupted only when a measured parameter moves outside a pre-programmed window. These ICs sit in the hierarchy: ADC -> data converter -> mixed-signal IC -> semiconductor, and they commonly supervise power rails, temperature sensors, and other analog health signals in space-constrained embedded designs.
Key features of the MAX1361MEUB+T include 10-bit resolution, four single-ended analog input channels multiplexed into one ADC core, an integrated programmable window comparator that generates the ALERT/INT signal when any channel leaves its user-defined min/max band, and SMBus-compatible alert response that complies with the SMBALERT# protocol used by system management ICs. The interface is an I2C/SMBus-compatible serial port. The 10-pin TSSOP (also referred to as uMAX in Maxim's package family) keeps board area to about 3 mm by 3 mm and supports surface-mount reflow assembly.
The device is specified over the industrial temperature range of -40C to +85C and supports an external reference voltage for the ADC core. Its low supply current makes it attractive for always-on supervisory functions in battery-powered systems where the host CPU is normally in sleep mode. The MAX1361 (internal reference setup) and MAX1362 (external reference setup) form the family; the EUB suffix indicates the 10-pin TSSOP industrial-grade package, and the +T suffix denotes tape-and-reel packaging.
Typical applications include multi-rail voltage monitoring in servers, industrial control boards, and battery management systems (BMS); temperature-point monitoring with external sensors connected to the analog inputs; portable and handheld instruments requiring 4-channel data acquisition; and any embedded design that wants to offload analog threshold supervision from the main MCU. The autonomous window comparator means the MAX1361MEUB+T can wake the host only when an alarm condition occurs, reducing software overhead and interrupt traffic.
When designing with the MAX1361MEUB+T, place 0.1 uF decoupling capacitors as close as possible to the VDD and GND pins, use a low-impedance analog ground, and keep analog input traces short and away from switching nodes. Configure the trip-window limits via the SMBus registers during initialization; the part then monitors autonomously and asserts ALERT/INT whenever any input leaves its programmed band. A pull-up resistor on the SMBus SDA/SCL lines and on the alert output is required.
This page synthesizes distributor pricing, drop-in alternatives, and practical design guidance not found in the manufacturer datasheet.
Drop-in alternatives for MAX1361MEUB+T — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with MAX1361MEUB+T (same form factor and footprint) — differing in Package, Sampling Rate, Operating Temperature Range, Window Comparator, Resolution.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MAX1361EUB+
✅ Drop-In📋 Reference alternative (not in catalog)
MAX1361MEUB+
✅ Drop-In✓ In Stock
$4.1 / Unit
View Datasheet →MAX1362MEUB+T
✅ Drop-In✓ In Stock
$3.96 / Unit
View Datasheet →MAX1362EUB+
✅ Drop-In📋 Reference alternative (not in catalog)
MAX1162ACUB+T
✅ Drop-In✓ In Stock
$5.74 / Unit
View Datasheet →MAX1361MEUB+T Maximum Ratings & Electrical Characteristics
| Function | 4-Channel, 10-Bit System Monitor ADC with Programmable Trip Window and SMBus Alert Response |
| Resolution | 10 bit |
| Number of Channels | 4 (single-ended) |
| Sampling Rate | 150 ksps (aggregate) |
| Supply Voltage | 2.7 V to 3.6 V |
| Interface | I2C / SMBus-compatible serial |
| Reference Voltage | Internal (MAX1361) / External (MAX1362 family variant) |
| Window Comparator | Yes, digitally programmable per channel |
| Alert Output | Yes (SMBus ALERT# / INT) |
| Operating Temperature Range | -40 C to +85 C (industrial) |
| Package | 10-pin TSSOP (uMAX / MEUB) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
| Packaging | Tape & Reel (T suffix) |
MAX1361MEUB+T Pin Configuration
| Pin 1 | VDD — Positive supply (2.7V to 3.6V) |
| Pin 2 | GND — Ground reference |
| Pin 3 | AIN0 — Analog input channel 0 |
| Pin 4 | AIN1 — Analog input channel 1 |
| Pin 5 | AIN2 — Analog input channel 2 |
| Pin 6 | AIN3 — Analog input channel 3 |
| Pin 7 | REF — Reference voltage input (MAX1362) / internal reference bypass (MAX1361) |
| Pin 8 | SCL — SMBus/I2C serial clock |
| Pin 9 | SDA — SMBus/I2C serial data |
| Pin 10 | INT/ALERT# — Interrupt/alert output (active-low) |
Typical Applications
MAX1361MEUB+T is suitable for 6 applications: Multi-Rail Voltage Monitoring, Battery Management System (BMS) Supervision, Temperature Monitoring via Analog Sensors, Portable Data Logger / Handheld Instruments, Industrial PLC Analog Threshold Detection, Embedded System Health Monitoring.
Multi-Rail Voltage Monitoring
The MAX1361MEUB+T fits multi-rail voltage monitoring in servers, networking switches, and industrial control boards where 3.3 V, 2.5 V, 1.8 V, and 1.2 V rails must each stay within +/-5% of nominal. Its four single-ended channels accept resistor-scaled rail voltages up to VDD, while the integrated window comparator compares each conversion against programmable upper and lower thresholds stored in on-chip registers. Per the Maxim datasheet, an ALERT# interrupt is asserted only when a rail leaves its band, so the host CPU stays asleep during steady-state operation. This routing-through bypass of host polling reduces interrupt traffic from thousands of conversions per second to a few alarm events per day.
Recommended
Battery Management System (BMS) Supervision
The MAX1361MEUB+T is well-suited to battery management system (BMS) supervision in 1S to 4S Li-ion packs where pack voltage, charge current sense, and temperature must each be monitored against programmable thresholds. The four analog inputs are routed through resistor dividers for cell voltages and to a thermistor divider for pack temperature, then converted by the 10-bit SAR core at up to 150 ksps. According to the Maxim datasheet, the integrated SMBus alert response means the charge controller IC only needs to wake when a measured parameter leaves its safe band, dropping quiescent draw by orders of magnitude versus continuous polling.
Recommended
Temperature Monitoring via Analog Sensors
The MAX1361MEUB+T supports temperature monitoring with external NTC or PTC thermistors in industrial and medical equipment, where four discrete temperature zones must each be supervised independently. The thermistor divider outputs are applied to the four analog inputs, and the on-chip window comparator compares each conversion against programmable min/max thresholds set via the SMBus registers during factory setup. Per the Maxim datasheet, the integrated ALERT# output can directly gate a fan, heater, or shutdown MOSFET through a single GPIO interrupt, eliminating dedicated comparator ICs and shrinking BOM cost.
Recommended
Portable Data Logger / Handheld Instruments
The MAX1361MEUB+T's low supply current and 2.7 V to 3.6 V single-supply range make it well-suited for portable data loggers, handheld multimeters, and field instruments that need four channels of 10-bit acquisition on a single coin-cell or Li-ion rail. The four single-ended inputs can be routed through sensor front-ends for voltage, current, temperature, and process signals, and the SMBus interface is shared with the main MCU. According to the Maxim datasheet, the integrated window comparator can flag out-of-range measurements directly to the MCU's idle/interrupt pin, reducing firmware complexity and the on-time AA-battery drain.
Recommended
Industrial PLC Analog Threshold Detection
The MAX1361MEUB+T fits industrial PLC analog threshold detection where 4-20 mA loop signals, photoelectric sensors, or proximity-switch contacts must each be monitored for over/under-range conditions. The four analog inputs accept scaled sensor outputs, and the integrated window comparator asserts ALERT# whenever any input leaves its pre-programmed band, gating the PLC's interrupt controller. Per the Maxim datasheet, the industrial -40C to +85C operating range plus the SMBus interface make it ideal for DIN-rail-mount backplanes and remote I/O modules where space is constrained.
Recommended
Embedded System Health Monitoring
The MAX1361MEUB+T suits embedded system health monitoring in routers, set-top boxes, and printers where board temperature, fan RPM (via analog tach IC), and key supply rails must each be supervised. The four analog inputs are routed to a board temperature sensor, a fan tachometer, and two key rails (e.g., 5 V and 3.3 V), and the integrated window comparator alerts the host only on fault conditions. According to the Maxim datasheet, the SMBus alert response shares the alert pin with other system-management ICs, eliminating the need for a dedicated GPIO per supervisor.
Recommended
Recommended Products Summary
Engineering reference data for MAX1361MEUB+T — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MAX1361EUB+ | MAX1361MEUB+ | MAX1362MEUB+T | MAX1362EUB+ | MAX1162ACUB+T |
|---|---|---|---|---|---|---|
| Package | 10-pin TSSOP (uMAX / MEUB) | 10-pin TSSOP (uMAX) - same | 10-pin TSSOP (uMAX) - same | 10-pin TSSOP (uMAX) - same | 10-pin TSSOP (uMAX) - same | 10-pin TSSOP (uMAX) - same |
| Brand | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated |
| Resolution | 10 bit | 10 bit | 10 bit | 10 bit | 10 bit | 14 bit |
| Number of Channels | 4 single-ended | 4 single-ended | 4 single-ended | 4 single-ended | 4 single-ended | 1 differential |
| Reference Type | Internal (MAX1361) | Internal | Internal | External (REF pin) | External (REF pin) | External (REF pin) |
| Window Comparator | Yes (integrated) | Yes | Yes | Yes | Yes | No |
| SMBus Alert Response | Yes | Yes | Yes | Yes | Yes | No |
Key Differentiators
- Integrated programmable window comparator plus ALERT/INT output (vs MAX1162ACUB+T)
- Higher channel count in the same footprint (vs MAX1162ACUB+T)
- Internal ADC reference eliminates external reference IC (vs MAX1362MEUB+T)
Design Notes
Per the Maxim datasheet, the MAX1361MEUB+T operates from 2.7 V to 3.6 V on VDD. Place a 0.1 uF ceramic bypass capacitor from VDD to GND as close as physically possible to the IC pins (within 2-5 mm) to ensure low-impedance high-frequency decoupling. Add a bulk 1 uF to 10 uF tantalum or ceramic capacitor near VDD if the upstream 3.3 V regulator is more than 25 mm away. Estimate: total VDD pin current including ADC conversions and SMBus activity is typically <1 mA, so the 0.1 uF + 10 uF combination is more than sufficient.
Per the Maxim datasheet, the SMBus SDA and SCL lines and the ALERT/INT output are open-drain and require external pull-up resistors to VDD; values between 2.2 kohm and 10 kohm are typical, with 4.7 kohm a good default. Do not connect any of these pins directly to a push-pull logic output or to a pull-up to a voltage higher than VDD. Also, be careful to distinguish between MAX1361 (internal) and MAX1362 (external reference) variants at ordering time: the pinout is identical, but the MAX1362 REF pin must be driven by a precision external reference for normal operation.
Estimated: route the four AIN traces as short and direct as possible (under 25 mm ideal), keep them away from switching nodes (DC-DC converters, clock signals) by at least 3 mm, and route them over a continuous analog ground plane. Per the Maxim datasheet, the GND pin should return to the system analog ground, ideally a star-ground point near the ADC's GND pin. Avoid running AIN traces parallel to noisy digital traces; if they must cross, do so at 90 degrees to minimize coupling. Place the 0.1 uF VDD bypass within 2 mm of the VDD pin with a via to the ground plane as close as possible.
Compliance Information
RoHS and REACH compliant per Maxim Integrated product page; lead-free and halogen-free per package marking; not AEC-Q100 qualified (industrial grade only).
