# MAX6675ISA+

**Analog Devices Inc./Maxim Integrated** · Interface - Specialized · SOIC-8

MAX6675ISA+ from Analog Devices Inc./Maxim Integrated, in a SOIC-8. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | GND | power_in | Ground reference for the device; the datasheet gives no separate limits for this pin. |
| 2 | T- | passive | Alumel lead of the type-K thermocouple, which should be connected to ground externally and kept as close to GND as possible for open-thermocouple detection. |
| 3 | T+ | passive | Chromel lead of the type-K thermocouple; absolute maximum rating is -0.3V to VCC + 0.3V relative to GND. |
| 4 | VCC | power_in | Positive supply, specified from 3.0V to 5.5V with a 0.1µF bypass capacitor to GND placed close to the pin. |
| 5 | SCK | input | Serial clock input, with a maximum serial clock frequency of 4.3 MHz. |
| 6 | CS | input | Chip select; set CS low to enable the serial interface, and forcing it low immediately stops any conversion in progress. |
| 7 | SO | output | Serial data output delivering the 16-bit read (dummy sign bit, 12-bit temperature, open-thermocouple flag, device ID bit and three-state bit), with a maximum SO current of 50mA. |
| 8 | N.C. | unconnected | No connection; the pin is not used internally. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Analog Devices Inc./Maxim Integrated |
| Package | SOIC-8 |
| Category | Interface |
| Pins | 8 |

## Electrical characteristics

Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Temperature Error (TTHERMOCOUPLE = +700°C, TA = +25°C), VCC = +3.3V |  | -5 |  | 5 | LSB | TTHERMOCOUPLE = +700°C, TA = +25°C (Note 2), VCC = +3.3V | 2 |
| Temperature Error (TTHERMOCOUPLE = +700°C, TA = +25°C), VCC = +5V |  | -6 |  | 6 | LSB | TTHERMOCOUPLE = +700°C, TA = +25°C (Note 2), VCC = +5V | 2 |
| Temperature Error (TTHERMOCOUPLE = 0°C to +700°C, TA = +25°C), VCC = +3.3V |  | -8 |  | 8 | LSB | TTHERMOCOUPLE = 0°C to +700°C, TA = +25°C (Note 2), VCC = +3.3V | 2 |
| Temperature Error (TTHERMOCOUPLE = 0°C to +700°C, TA = +25°C), VCC = +5V |  | -9 |  | 9 | LSB | TTHERMOCOUPLE = 0°C to +700°C, TA = +25°C (Note 2), VCC = +5V | 2 |
| Temperature Error (TTHERMOCOUPLE = +700°C to +1000°C, TA = +25°C), VCC = +3.3V |  | -17 |  | 17 | LSB | TTHERMOCOUPLE = +700°C to +1000°C, TA = +25°C (Note 2), VCC = +3.3V | 2 |
| Temperature Error (TTHERMOCOUPLE = +700°C to +1000°C, TA = +25°C), VCC = +5V |  | -19 |  | 19 | LSB | TTHERMOCOUPLE = +700°C to +1000°C, TA = +25°C (Note 2), VCC = +5V | 2 |
| Cold-Junction Compensation Error, VCC = +3.3V |  | -3 |  | 3 | °C | TA = -20°C to +85°C (Note 2), VCC = +3.3V | 2 |
| Cold-Junction Compensation Error, VCC = +5V |  | -3 |  | 3 | °C | TA = -20°C to +85°C (Note 2), VCC = +5V | 2 |
| Supply Voltage | VCC | 3 |  | 5.5 | V |  | 2 |
| Supply Current | ICC |  | 0.7 | 1.5 | mA |  | 2 |
| Power-On Reset Threshold |  | 1 | 2 | 2.5 | V | VCC rising | 2 |
| Input Low Voltage | VIL |  |  | 0.3 | x VCC | Printed as 0.3 x VCC | 2 |
| Input High Voltage | VIH | 0.7 |  |  | x VCC | Printed as 0.7 x VCC | 2 |
| Input Leakage Current | ILEAK | -5 |  | 5 | µA | VIN = GND or VCC | 2 |
| Output High Voltage | VOH | 0.4 |  |  | V | ISOURCE = 1.6mA; printed as VCC - 0.4 V | 3 |
| Output Low Voltage | VOL |  |  | 0.4 | V | ISINK = 1.6mA | 3 |
| Serial Clock Frequency | fSCL |  |  | 4.3 | MHz |  | 3 |
| SCK Pulse High Width | tCH | 100 |  |  | ns |  | 3 |
| SCK Pulse Low Width | tCL | 100 |  |  | ns |  | 3 |
| CSB Fall to SCK Rise | tCSS |  |  | 100 | ns | CL = 10pF | 3 |
| CSB Fall to Output Enable | tDV |  |  | 100 | ns | CL = 10pF | 3 |
| CSB Rise to Output Disable | tTR |  |  | 100 | ns | CL = 10pF | 3 |
| SCK Fall to Output Data Valid | tDO |  |  | 100 | ns | CL = 10pF | 3 |
| Supply Voltage (VCC to GND) | VCC | -0.3 |  | 6 | V |  | 2 |
| SO, SCK, CS, T-, T+ to GND |  | -0.3 |  | 0.3 | V | Printed max is VCC + 0.3V (upper limit referenced to VCC) | 2 |
| SO Current |  |  |  | 50 | mA |  | 2 |
| ESD Protection (Human Body Model) |  | -2000 |  | 2000 | V | Human Body Model | 2 |
| Continuous Power Dissipation |  |  |  | 471 | mW | TA = +70°C, 8-Pin SO (derate 5.88mW/°C above +70°C) | 2 |
| Operating Temperature Range | TA | -20 |  | 85 | °C |  | 2 |
| Storage Temperature Range | TSTG | -65 |  | 150 | °C |  | 2 |
| Junction Temperature | TJ |  |  | 150 | °C |  | 2 |
| Vapor Phase Soldering |  |  |  | 215 | °C | 60s, SO package | 2 |
| Infrared Soldering |  |  |  | 220 | °C | 15s, SO package | 2 |
| Lead Temperature (soldering) |  |  |  | 300 | °C | 10s | 2 |

## CAD (KiCad official)

- Symbol: `MAX6675ISA+`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOIC-8 (KiCad packages3D, STEP)
- 3D model files: `max6675isa-etched.step` / `max6675isa-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `max6675isa.step` / `max6675isa.glb` are the bare package body.

## Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

- **Datasheet:** [Analog Devices Inc./Maxim Integrated datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590939512971341824) (8 pp, sha256 `4a750e839fd0ac04`, retrieved 2026-10-19, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-sonnet-5-5` (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/max6675isa-datasheet.pdf)