# HT6541ARTZ

**HTCSEMI** · Comparators · SOT-23-5

HT6541ARTZ from HTCSEMI, in a SOT-23-5. 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 | OUT | output | Push-pull CMOS/TTL-compatible output that swings rail-to-rail and is capable of driving heavy DC or capacitive loads. |
| 2 | VSS | power_in | Negative power supply, equal to GND in the electrical specifications (VDD - VSS up to 7.0V absolute maximum). |
| 3 | VIN+ | power_in | Non-inverting comparator input; input voltage range is VSS - 0.3V to VDD + 0.3V. |
| 4 | VIN- | power_in | Inverting comparator input; input voltage range is VSS - 0.3V to VDD + 0.3V and input current must be limited to ±2 mA beyond that range. |
| 5 | VDD | power_in | Positive power supply, 1.6V to 5.5V single-supply operation. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | HTCSEMI |
| Package | SOT-23-5 |
| Category | Amplifiers/Comparators |
| Pins | 5 |

## Electrical characteristics

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

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Supply Voltage | VDD | 1.6 |  | 5.5 | V |  | 2 |
| Input Voltage Range | VCMR | -0.3 |  | 0.3 | V | Printed VSS, 0.3 V to VDD + 0.3 V; min is offset from VSS, max is offset from VDD | 2 |
| Common Mode Rejection Ratio | CMRR | 55 | 70 |  | dB | VDD = 5V, VCM = -0.3V to 5.3V | 2 |
| Common Mode Rejection Ratio | CMRR | 50 | 65 |  | dB | VDD = 5V, VCM = 2.5V to 5.3V | 2 |
| Power Supply Rejection Ratio | PSRR | 63 | 80 |  | dB | VCM = VSS | 2 |
| Quiescent Current per comparator | IQ | 0.3 | 0.6 | 1 | µA | IOUT = 0 | 2 |
| Input Offset Voltage | VOS | -7 | 1.5 | 7 | mV | VCM = VSS (Note 1); typ printed ±1.5 mV | 2 |
| Input Hysteresis Voltage | VHYST | 1.5 | 3.3 | 6.5 | mV | VCM = VSS (Note 1) | 2 |
| High-Level Output Voltage | VOH | -0.2 |  |  | V | IOUT = -2 mA, VDD = 5V; printed VDD, 0.2 V, min is offset from VDD | 2 |
| Low-Level Output Voltage | VOL |  |  | 0.2 | V | IOUT = 2 mA, VDD = 5V; printed VSS + 0.2 V, max is offset from VSS | 2 |
| Input Bias Current Over-Temperature | IB |  |  | 100 | pA | TA = -40°C to +85°C, VCM = VSS | 2 |
| Propagation Delay (High-to-Low) | tPHL |  | 4 | 8 | µs |  | 3 |
| Propagation Delay (Low-to-High) | tPLH |  | 4 | 8 | µs |  | 3 |
| Specified Temperature Range | TA | -40 |  | 85 | °C |  | 4 |
| Operating Temperature Range | TA | -40 |  | 125 | °C | Extended range with reduced performance (Note) | 4 |
| Storage Temperature Range | TA | -65 |  | 150 | °C |  | 4 |
| Supply Voltage Difference (VDD, VSS) | VDD-VSS |  |  | 7 | V |  | 2 |
| All Inputs and Outputs | VIN/VOUT | -0.3 |  | 0.3 | V | Printed VSS -0.3 V to VDD +0.3 V; min offset from VSS, max offset from VDD | 2 |
| Current at Input Pins | IIN | -2 |  | 2 | mA | Printed ±2 mA | 2 |
| Current at Output and Supply Pins | IOUT/IDD | -30 |  | 30 | mA | Printed ±30 mA | 2 |
| Storage Temperature | TSTG | -65 |  | 150 | °C |  | 2 |
| Maximum Junction Temperature | TJ |  |  | 150 | °C |  | 2 |
| ESD Protection HBM | ESD |  |  | 4 | kV | Human Body Model, all pins | 2 |
| ESD Protection MM | ESD |  |  | 400 | V | Machine Model, all pins | 2 |
| Thermal Resistance, 5L-SOT-23 | θJA |  | 256 |  | °C/W |  | 4 |
| Input Offset Voltage Drift with Temperature | VOS/TA |  | 3 |  | µV/°C | TA = -40°C to +85°C, VCM = VSS; printed ±3 µV/°C | 2 |
| Input Hysteresis Voltage Drift (TA = -40°C to +25°C) | VHYST/TA |  | 10 |  | µV/°C | TA = -40°C to +25°C, VCM = VSS | 2 |
| Input Hysteresis Voltage Drift (TA = +25°C to +85°C) | VHYST/TA |  | 5 |  | µV/°C | TA = +25°C to +85°C, VCM = VSS | 2 |
| Input Bias Current | IB |  | 1 |  | pA | VCM = VSS | 2 |
| Input Offset Current | IOS |  | 1 |  | pA | VCM = VSS; printed ±1 pA | 2 |
| Short-Circuit Current | ISC |  | 50 |  | mA | Note 2; printed ±50 mA | 2 |
| Rise Time | tR |  | 0.85 |  | µs |  | 3 |
| Fall Time | tF |  | 0.85 |  | µs |  | 3 |
| Propagation Delay Skew | tPDS |  | 0.2 |  | µs | Note 1; printed ±0.2 µs | 3 |
| Maximum Toggle Frequency | fMAX |  | 160 |  | kHz | VDD = 1.6V | 3 |
| Maximum Toggle Frequency | fMAX |  | 120 |  | kHz | VDD = 5.5V | 3 |
| Input Noise Voltage | EN |  | 200 |  | µVP-P | 10 Hz to 100 kHz | 3 |

## Materials and finish

As the datasheet states them (page.json `metadata.appearance`; the 3D model's colours follow it).

| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| contacts |  | tin | 8-Lead Plastic Small Outline (SN), Narrow, 150 mil(SOIC) Units INCHES* MILLIMETERS | 18 |

## CAD (KiCad official)

- Symbol: `HT6541ARTZ`
- Footprint: `Package_TO_SOT_SMD:SOT-23-5`
- 3D model: SOT-23-5 (KiCad packages3D, STEP)
- 3D model files: `ht6541artz-etched.step` / `ht6541artz-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ht6541artz.step` / `ht6541artz.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [HTCSEMI datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590456024734855168) (22 pp, sha256 `81d1b724b679a683`, 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/ht6541artz-datasheet.pdf)